# XLVI International Symposium on Multiparticle Dynamics (ISMD2016)

from 29 August 2016 to 02 September 2016 (Asia/Seoul)
Seogwipo KAL Hotel, Jeju Island
Asia/Seoul timezone
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Displaying 82 contributions out of 82
Session: Session 3-I
Track: Forward physics and diffraction
We will describe possible measurements at the LHC in forward physics that will give more insights on the proton structure in terms of quarks and gluons in the case that protons are intact in the final state. We will finish the presentation by discussing photon-induced processes at the LHC that are relevant to explain the di-photon excess that is observed by the ATLAS and CMS collaborations at abou ... More
Presented by Prof. Christophe ROYON on 30 Aug 2016 at 14:25
Session: Session 3-II
Track: Forward physics and diffraction
The polarized proton-proton collider at RHIC provides an unique opportunity to study the spin structure of proton. In this talk, I will present highlights in latest gluon polarization measurements through double longitudinally polarized proton+proton collision experiment at PHENIX. In addition to the helicity structure of proton, the transverse structure is also to be discussed. Particularly we ha ... More
Presented by Dr. Itaru NAKAGAWA on 30 Aug 2016 at 16:35
Session: Session 5-III
Track: Collectivity in high-energy collisions: jets, flows or other
Event shapes provide a key method of measuring jets in deep-inelastic scattering (DIS). This was done successfully by H1 and ZEUS and compared with theoretical calculations with next-to-leading-logarithmic (NLL) resummation. I will present our progress for a high precision calculation of a event shape called DIS thrust, with next-to-next-to-next-to-leading-logarithmic resummation. I will also show ... More
Presented by Dr. Daekyoung KANG on 1 Sep 2016 at 14:00
Session: Session 4-I
Track: Perturbative and non-perturbative features of QCD
The behaviour of hadronic matter under extreme conditions can be studied in laboratory with ultra-relativistic heavy-ion collisions, allowing one to test Quantum Chromo-Dynamics (QCD) across its phase diagram. ALICE (A Large Ion Collider Experiment) at the LHC is specifically designed to study the properties of the deconfined state of the hadronic matter, the Quark-Gluon Plasma, in the region of t ... More
Presented by Dr. Antonio URAS on 30 Aug 2016 at 08:55
Session: Session2-I
Track: Hadronic final state in high-pT interactions
We present results on several new search strategies for heavy vector-like quark partners at the LHC run-II. Run-II has sensitivity to single- and pair-produced quark partners with masses beyond 1 TeV. Decays of such heavy particles yield highly boosted tops, Higgses, and weak gauge bosons, all of which decay dominantly hadronically. At high boost, the SM background of hadronic final states can be ... More
Presented by Dr. Thomas FLACKE on 30 Aug 2016 at 09:20
Session: Session 4-II
Track: Perturbative and non-perturbative features of QCD
In this talk I give an introduction to our newly constructed light-front ab initio approach to QED and QCD. This method is based on light-front quantization and Hamiltonian formalism of quantum field theory. Its goal is to provide nonperturbative solutions to QCD based on first-principles. In the first part I introduce its applications to stationary problems, where we solve quantum field systems t ... More
Presented by Mr. Zhao XINGBO on 31 Aug 2016 at 10:40
Session: Session 4-I
Track: Perturbative and non-perturbative features of QCD
One of the principal challenges that calculations of energetic particle and jet production in heavy ion reactions face is the ambiguity associated with the implementation of radiative in-medium effects. A recently developed effective theory of jet propagation in matter, soft-collinear effective theory with Glauber gluons (SCET_G) has allowed us to quantify and greatly reduce the uncertainty in jet ... More
Presented by Dr. Ivan VITEV on 30 Aug 2016 at 08:30
Session: Session2-I
Track: Hadronic final state in high-pT interactions
Measurements of high-pT objects and the hadronic final state at HERA provide a detailed understanding of the structure of the proton, precise measures of the strong coupling constant and other powerful tests of QCD. Measurements are presented of prompt photon and jet production in deep inelastic scattering; both are compared with QCD predictions. Given the large sample of one-, two- and three-jet ... More
Presented by Mr. Katsuo TOKUSHUKU on 29 Aug 2016 at 08:30
Session: Session 4-I
Track: Perturbative and non-perturbative features of QCD
High momentum transfer processes can be reliably calculated by perturbative quantum chromodynamics (pQCD). Products of those hard processes, high transverse momentum particles and heavy quarks (hard probes), interact with the quark-gluon plasma (QGP) created in relativistic heavy ion collisions. Properties of the QGP can be studied by comparing hard probe measurements in heavy ion collisions t ... More
Presented by Mr. Fuqiang WANG on 31 Aug 2016 at 09:45
Session: Session 3-I
Track: Forward physics and diffraction
The talk will cover newest 13 TeV results on the soft QCD from CMS, inter alia energy flow measurements, leading track and leading jet underlying event measurements, pp inelastic cross section. Also the diffraction results will be discussed including jet-gap-jet measurement at 7 TeV.
Presented by Dr. Grzegorz BRONA on 30 Aug 2016 at 14:00
Session: Session 7-III
Track: Cosmic ray and astroparticle physics
Atmospheric neutrinos can be produced from the decays of charmed hadrons as well as from pion and kaon decays. The neutrinos from the heavy quark associated hadrons are called the prompt neutrinos while those from the pion and kaon are called the conventional neutrinos. The flux of the charm induced prompt neutrinos dominates the conventional neutrino flux at the high energies above about 1 PeV. ... More
Presented by Dr. Yu Seon JEONG on 2 Sep 2016 at 10:45
Session: Session 3-I
Track: Forward physics and diffraction
Diffractive excitation is a large fraction of the pp cross section, also at high energies. Diffraction has traditionally been described either by multi-Regge diagrams, or in the Good-Walker formalism as a result of fluctuations. However, within the BFKL dynamics these two pictures are different sides of the same phenomenon. The dipole cascade formalism in impact parameter space is well suited to d ... More
Presented by Mr. Gosta GUSTAFSON on 30 Aug 2016 at 15:15
Session: Session2-I
Track: Hadronic final state in high-pT interactions
We study jet production in e+e- annihilation to hadrons with data recorded by the OPAL experiment at LEP at centre-of-mass energies between 90 GeV and 207 GeV. The jet production rates were measured for the first time with the anti-k_t and SISCone jet clustering algorithms. We compare the data with predictions by modern Monte Carlo event generators.
Presented by Mr. Stefan KLUTH on 30 Aug 2016 at 09:45
Session: Flash Talk
Track: Flash Talks Session for Posters
At moderate values of tan(beta), a charged Higgs boson is exceptionally difficult to find due its small cross section and large backgrounds. A recent paper has suggested that a charged Higgs could be found in this wedge region using boosted top and bottom jets. We improve our boosted bottom jet tag using tracking information and predict the reach for charged Higgs bosons at 14 TeV and 100 TeV co ... More
Presented by Prof. Zack SULLIVAN on 29 Aug 2016 at 17:25
Session: Special Session 1
Track: Special Session I
Initiated by the Beijing Electron Positron Collider (BEPC), high energy physics in China has been developing for more than 30 years, together with the developments of detector and accelerator technologies. A substantial results on particle physics was obtained on the BEPC, stimulating the upgrade of the BEPC, BEPCII, which was finished 10 years ago. Now the BEPCII keeps running with some new phys ... More
Presented by Dr. Qing QIN on 29 Aug 2016 at 17:00
Session: Session 5-II
Track: Collectivity in high-energy collisions: jets, flows or other
The suppression of ϒ-mesons in the hot quark-gluon medium (QGP) versus reduced feed-down is investigated in UU collisions at RHIC energies and PbPb collisions at LHC energies. Our centrality- and p_T-dependent model encompasses screening, collisional damping and gluodissociation in the QGP. For ϒ(1S) it is in agreement with both STAR and CMS data provided the relativistic Doppler effect, and t ... More
Presented by Dr. G. WOLSCHIN on 1 Sep 2016 at 11:50
Session: Session 4-II
Track: Perturbative and non-perturbative features of QCD
In this contribution I will talk about our recent results on photon production from the Color Glass Condensate (CGC) in the high energy pA collision. The nucleus is considered as a dense source of soft gluons while the proton is more dilute. This allows a systematic expansion of the amplitude in the powers of the gluon density of the proton. The zeroth order approximation comes from bremsstrahlu ... More
Presented by Dr. Sanjin BENIC on 31 Aug 2016 at 11:30
Session: Session 7-II
Track: Cosmic ray and astroparticle physics
Ultra high energy cosmic rays (UHECRs) are expected to be accelerated in astrophysical sources and to travel through extragalactic space before hitting the Earth atmosphere. They interact both with the environment in the source and with the intergalactic photon fields they encounter, causing different processes at various scales depending on the photon energy in the nucleus rest frame.\\ An overv ... More
Presented by Dr. Denise BONCIOLI on 2 Sep 2016 at 09:00
Session: Flash Talk
Track: Flash Talks Session for Posters
Strong suppression of high ${p_{\rm T}}$ particles has been observed in heavy-ion collisions at LHC energies, which can be interpreted by invoking various processes involving transport properties of the QCD medium and initial state effects. Proton-nucleus ($p$-$A$) collisions are intermediate between proton-proton ($pp$) and nucleus-nucleus ($A$-$A$) collisions in terms of system size and number o ... More
Presented by Dr. Tsubasa OKUBO on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
The success of current high energy physics experiments usually depend on the discrimination of particle signals. As for charged particles, the particle signals can be determined and discriminated through the measurements of the charge number and mass. However, for neutral particles, for instance, gamma photons and neutrons, the method used for discrimination of charged particles are incompetence. ... More
Presented by Mr. Dong LIU on 29 Aug 2016 at 17:25
Session: Session 5-III
Track: Collectivity in high-energy collisions: jets, flows or other
We explore predictions of the wounded quark model for particle production and properties of the initial state formed in ultrarelativistic heavy-ion collisions. The approach is applied uniformly to A+A collisions in a wide collision energy range, as well as for p+A and p+p collisions at the CERN Large Hadron Collider (LHC). We find that generically the predictions from wounded quarks for such featu ... More
Presented by Mr. Maciej RYBCZYNSKI on 1 Sep 2016 at 15:10
Session: Session 6-I
Track: Proton structure, small and large-x physics
I discuss our recent investigations on generalized parton distributions (GPDs) and generalized distribution amplitudes (GDAs). First, hadron tomography studies are introduced by explaining basics of the GPDs and GDAs. Next, I discuss our works on these topics. The GPDs have been investigated mainly by the virtual Compton process at lepton accelerator facilities; however, there are unique opportuni ... More
Presented by Dr. S. KUMANO on 1 Sep 2016 at 16:50
Session: Session 1-I
Track: Multi-particle correlations and fluctuations: from small to large systems
The azimuthal anisotropy on the particle emission is considered as one of the probles to study properties of the state of deconfined quarks and gluons state (QGP) generation in the high-energy heavy-ions collisions. The azimuthal anisotropy is sensitive to the early stage and, is the observable that is affected by QGP properties. We will report the recent measurements of azimuthal anisotropy with ... More
Presented by Dr. Maya SHIMOMURA on 29 Aug 2016 at 09:50
Session: Flash Talk
Track: Flash Talks Session for Posters
The charmonia are important probes to study the properties of the de-confined medium, the so called quark-gluon plasma (QGP), produced by ultra-relativisitc heavy-ion collisions. On the other hand, the prompt and non-prompt $J/\psi$ productions in asymmetric proton-nucleus collisions enable us to investigate the cold nuclear matter effects (CNM), which provide new information to examine quantitati ... More
Presented by Ms. Songkyo LEE on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
Hadrons with heavy quarks are promising probes to investigate the detailed properties of hot and dense medium generated by heavy-ion collisions at collider energies. Since heavy quarks are sensitive to the transport properties of the medium, the energy-losspattern of them is expected to be quite different from that of light quarks in a strongly-interacting matter. On the other hand, in order to el ... More
Presented by Mr. KiSoo LEE on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
A neutral kaon decay, KL->pi0pi0gamma, totally 5 gamma rays are produced fron 2pi0 and gamma. KL->pi0pi0gamma decay rate can be calculated by a Chiral Perturbation Theoty (ChPT) that explains well the strong interaction at the low energy-region. In this presentation, we calculated a rate of misunderstandiong as KL->pi0pi0pi0 decay mode that can be detected as those 5 gamma rays as KL->pi0pi0gamma. ... More
Presented by Mr. Jewou KO on 29 Aug 2016 at 17:25
Session: Session 1-II
Track: Multi-particle correlations and fluctuations: from small to large systems
In high-energy hadronic collisions, studies of inclusive single-particle distributions as well as multi-particle correlations are used to investigate particle production in QCD. Charged-particle multiplicity distributions as a function of pseudorapidity will be shown for pp collisions over a range of centre-of-mass energies as well as for p-Pb collisions, including the latest results from pp coll ... More
Presented by Dr. Alice OHLSON on 29 Aug 2016 at 12:00
Session: Session 5-II
Track: Collectivity in high-energy collisions: jets, flows or other
Heavy flavor is a useful probe to study the property of the strongly coupled quark gluon plasma created in high-energy heavy-ion collisions. They are produced in the early stage of the collisions, and then propagate through QGP. Therefore, they carry information of QGP. PHENIX measures the separated bottom and charm production using the precise tracking by the silicon vertex detector installed at ... More
Presented by Dr. Takashi HACHIYA on 1 Sep 2016 at 11:25
Session: Flash Talk
Track: Flash Talks Session for Posters
X-ray bursts which are one of the most energetic explosion events have been observed in low-mass X-ray binaries (LMXBs). Type-I X-ray bursts showing photospheric radius expansion (PRE) are main objects to offer a possibility of determining the neutron star masses and radii in the binary systems. Since 20% of total X-ray bursts show the evidence of PRE explosion, it is difficult to analyze physical ... More
Presented by Dr. Myungkuk KIM on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
Differential cross sections of top-quark pair production are measured in the dilepton decay channel with proton-proton collisions at a center-of-mass energy of 13 TeV. The measurement is performed with Run II data using the CMS detector at the Large Hadron Collider. In this analysis, we measure the differential cross sections with respect to the kinematic variables of leptons, bjets, and top-quark ... More
Presented by Ms. Dajeong JEON on 29 Aug 2016 at 17:25
Session: Session 2-II
Track: Hadronic final state in high-pT interactions
The BABAR Collaboration has an extensive and longstanding program studying hadronic cross sections in low-energy e+e- collisions, accessible via initial-state photon radiation. The measurements allow significant improvements in the precision of the standard model prediction for the muon anomalous magnetic moment. Recent results on final states with neutral kaons, and on the pi+pi-pi0pi0 final sta ... More
Presented by Prof. Bill GARY on 30 Aug 2016 at 10:40
Session: Session 5-III
Track: Collectivity in high-energy collisions: jets, flows or other
We study the K* meson reduction in heavy ion collisions by focusing on the hadronic effects on the K* meson abundance. We evaluate the absorption cross sections of the K* and K meson by light mesons in the hadronic matter, and further investigate the variation in the meson abundances for both particles during the hadronic stage of heavy ion collisions. We show how the interplay between the interac ... More
Presented by Dr. Sungtae CHO on 1 Sep 2016 at 14:50
Session: Special Session 2
Track: Special Session II
GSDC at KISTI is a unique data center in Korea established for promoting the fundamental research fields by supporting them with the expertise of information technology and the infrastructure for high performance computing and networking. GSDC has supported various research fields in Korea dealing with the large scale of data, e.g. RENO experiment for neutrino research, LIGO experiment for gravita ... More
Presented by Dr. Sang-Un AHN on 30 Aug 2016 at 17:50
Session: Flash Talk
Track: Flash Talks Session for Posters
Measurement of isolated photon gives possibility to constrain the nuclear parton distribution functions (nPDF). Isolated photon is also the clear tag in photon-jet channel for studying energy loss of the jets in medium. The performance of isolated photon reconstruction and identification has been studied in PbPb collisions at sqrt(s) = 5.02 TeV. We describe signal template method to determine the ... More
Presented by Ms. Yeonju GO on 29 Aug 2016 at 17:25
Session: Session 7-I
Track: Cosmic ray and astroparticle physics
Observations of Very High Energy (VHE) astrophysical gamma-rays can provide a powerful method for exploring fundamental aspects of astrophysics and particle physics, including probing the origin, propagation, and interactions of cosmic rays, exploration of the particle nature of astrophysical Dark Matter, and searching for potential Lorentz Invariance violation due to effects of Quantum Gravity. I ... More
Presented by Prof. David KIEDA on 1 Sep 2016 at 17:15
Session: Session 1-I
Track: Multi-particle correlations and fluctuations: from small to large systems
The collective expansion of the color-deconfined fireball created in ultra-relativistic heavy-ion collisions can map the initial state of the quark-gluon plasma (QGP) to the final-state particle spectrum. The ALICE experiment has been leading important roles for completing the individual flow harmonic measurements at the highest energies to date as well as improving flow harmonic correlation tech ... More
Presented by Dr. Dong Jo KIM on 29 Aug 2016 at 09:00
Session: Session 4-I
Track: Perturbative and non-perturbative features of QCD
Fluctuations of conserved quantities in heavy-ion collisions are used to probe the phase transition and the QCD critical point for the hot and dense nuclear matter. The STAR experiment has carried out moment analysis of net-proton (proxy for net-baryon (B)), net-kaon (proxy for net-strangeness (S)), and net-charge (Q). These measurements are important for understanding the quantum chromodynamics ... More
Presented by Dr. Xiaofeng LUO on 31 Aug 2016 at 09:20
Session: Session 5-I
Track: Collectivity in high-energy collisions: jets, flows or other
We develop a hybrid model in which space-time evolution of the bulk matter, jet propagation and their interactions are described within one framework. When an energetic jet traverses the bulk matter, it loses its energy into the matter and forms a Mach-cone like structure. On the other hand, the bulk matter expands radially due to pressure gradient. As a result, there happens an interplay between ... More
Presented by Prof. Tetsufumi HIRANO on 31 Aug 2016 at 08:55
Session: Session 2-II
Track: Hadronic final state in high-pT interactions
We point out that a distinctive mono-top signature is present in Natural SUSY scenarios when a scalar top-quark and higgsinos are almost mass degenerate. Unlike mono-jet signatures exploiting initial state radiation, this channel can be regarded as a smoking gun signature of a light stop and higgsinos, allowing a direct probe of the stop and neutralino sectors. The production rate of this channel ... More
Presented by Dr. Michihisa TAKEUCHI on 30 Aug 2016 at 11:50
Session: Session 1-II
Track: Multi-particle correlations and fluctuations: from small to large systems
The LHCb experiment, besides its main programme of b and c-physics also performs very well as a general purpose forward detector, covering the pseudo-rapidity range 2.0 to 5.0. Exploiting the experiment's unique geometry, the LHCb collaboration is pursuing a rich programme of forward QCD measurements. In particular two-particle angular correlations are studied in proton-lead collisions at a nucle ... More
Presented by Prof. Mariusz WITEK on 29 Aug 2016 at 12:25
Session: Session 5-I
Track: Collectivity in high-energy collisions: jets, flows or other
Recent results on collective flow measurements from RHIC experiments are shown and discussed especially on the higher order azimuthal event anisotropy measurements and their relation to the ridge like phenomena including the possible collective flow evolution in the small systems. Current results from the beam energy scan program (BES) and future programs are also discussed.
Presented by Dr. ShinIchi ESUMI on 31 Aug 2016 at 08:30
Session: Session 1-III
Track: Multi-particle correlations and fluctuations: from small to large systems
It is known that multiparticle dynamics exhibit finger-prints of a frac- tal structure, as evidenced in the intermittence of experimental data. The fractal aspects of QCD is also present in other observables, as the Parton Distribution Functions. From a historical perspective, one can say that the first time fractal aspects of strongly interacting systems was addressed is in the work by Rolf ... More
Presented by Dr. Airton DEPPMAN on 29 Aug 2016 at 15:15
Session: Session 1-III
Track: Multi-particle correlations and fluctuations: from small to large systems
We investigate collectivity in small colliding systems by using an integrated dynamical model in which Monte-Carlo initialization of hydrodynamic fields, ideal hydrodynamic description of the QGP fluids and the kinetic description of the hadron gas are incorporated. We implement fluctuations of multiplicity and longitudinal-matter-profile in the initial conditions which are important, in particula ... More
Presented by Mr. Koji KAWAGUCHI on 29 Aug 2016 at 14:25
Session: Flash Talk
Track: Flash Talks Session for Posters
The production of three individual Υ states (1S, 2S, 3S) has been investigated using the Compact Muon Solenoid (CMS) in pp and pPb collisions at the center-of-mass energies of 2.76 and 5.02 TeV respectively. The datasets used in this analysis correspond to the recorded integrated luminosities of about 31/nb (pPb) and 5.1/pb (pp), collected in 2013 at LHC.We study upsilons which decay into muons o ... More
Presented by Mr. JaeBeom PARK on 29 Aug 2016 at 17:25
Session: Session 1-I
Track: Multi-particle correlations and fluctuations: from small to large systems
The flow anisotropies with the fourier coefficients (n = 2, 3) for the charged particles produced in PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector. In order to extract the fourier coefficients, several methods were used, such as the scalar product method or multi-particle cumulant method. The results cover both of the low-pT region (1 < pT ... More
Presented by Prof. Dong Ho MOON on 29 Aug 2016 at 09:25
Session: Session 6-I
Track: Proton structure, small and large-x physics
Scattering processes that are sensitive to the transverse momentum distributions (TMDs) of gluons inside hadrons turn out to also be sensitive to multiple interactions. Initial and/or final state rescattering contributions lead to process dependence of gluon TMDs and to observable effects that are otherwise absent, such as single spin asymmetries. This talk will discuss this for unpolarized and li ... More
Presented by Mr. Daniel BOER on 1 Sep 2016 at 16:25
Session: Session 4-II
Track: Perturbative and non-perturbative features of QCD
A study of multi-jet correlations and color coherence effects is performed with data collected with the CMS experiment at the LHC. Multi-jet correlations in the angles between the jets are measured and compared to predictions including higher order corrections via parton showers.
Presented by Prof. Jason LEE on 31 Aug 2016 at 11:05
Session: Session 7-III
Track: Cosmic ray and astroparticle physics
Main results of the recent detections of gravitational waves from merging black hole binaries (e.g., GW150914 and GW151226) are reviewed briefly with future perspectives. LIGO uses a Michelson interferometer with Fabry-Perot cavities which measures the path difference between two arms of 4km when a gravitational wave passes the Earth. It is extremely sensitive so that it could measure a tiny chang ... More
Presented by Mr. Gungwon KANG on 2 Sep 2016 at 11:05
Session: Session 1-IV
Track: Multi-particle correlations and fluctuations: from small to large systems
Bose-Einstein correlations between identified charged pions are measured for $p$+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02~\mathrm{TeV}$ with the ATLAS detector with a total integrated luminosity of $28~\textrm{nb}^{-1}$. Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a funct ... More
Presented by Mr. Michael (Felix) CLARK on 29 Aug 2016 at 16:35
Session: Flash Talk
Track: Flash Talks Session for Posters
Ultraperipheral collisions (UPCs) of heavy ions involve long range electromagnetic interactions at impact parameters larger than sum of their radii where hadronic interaction is largely suppressed and the exchanged photon materializes into qq(bar) bound state after interacting with the gluonic field of the target proton or ion. Photoproduction of heavy vector mesons (J/psi, Upsilon) thus provide d ... More
Presented by Mr. Beomgon KIM on 29 Aug 2016 at 17:25
Session: Session 7-II
Track: Cosmic ray and astroparticle physics
The IceCube neutrino observatory, the worlds largest neutrino telescope, is located at the South Pole. It consists of 86 strings with 60 digital optical modules (DOMs) each, distributed over a volume of 1km^3 of ultrapure Antarctic ice. IceCube detects Cherenkov radiation from relativistic particles produced as a result of neutrino interactions in the ice. Different event topologies can be used to ... More
Presented by Mr. Seongjin IN on 2 Sep 2016 at 09:50
Session: Flash Talk
Track: Flash Talks Session for Posters
A very important aspect of understanding of primary cosmic ray flux and its composition is a proper description of recent measurement done by the ALICE experiment at CERN LHC, in its dedicated cosmic ray run [1]. ALICE Collaboration registered the presence of large groups of muons produced in EAS by cosmic ray interactions in the upper atmosphere [1]. A special emphasis has been given to ... More
Presented by Mr. Maciej RYBCZYNSKI on 29 Aug 2016 at 17:25
Session: Session 7-II
Track: Cosmic ray and astroparticle physics
The Alpha Magnetic Spectrometer (AMS) is a precision particle physics detector deployed in space to measure charged cosmic rays and study their characteristics. In 5 years on ISS, AMS has collected over 80 billion cosmic rays. In this presentation some examples of physics results are presented; new results on the positron fraction from 11 million events, AMS measurements of the electron and posit ... More
Presented by Prof. Dongchul SON on 2 Sep 2016 at 09:25
Session: Session 7-I
Track: Cosmic ray and astroparticle physics
In my presentation, I will briefly discuss the main results obtained so far by the Pierre Auger Collaboration which operates in Malargue (Argentina). The Pierre Auger Observatory is collecting data in the present configuration since 2008. Equipped with 27 Fluorescence Telescopes and 1660 Cherenkov Surface Detector, it has been the first largest cosmic ray observatory to make advantage from the hy ... More
Presented by Dr. antonio INSOLIA on 1 Sep 2016 at 17:40
Session: Session 3-II
Track: Forward physics and diffraction
Diffractive production of heavy quarks in deep-inelastic scattering (DIS) are sensitive to the partonic contents of diffractive exchange. The production of charm quarks in DIS was measured through the production cross section of D* in diffractive DIS. The presence of a jet and a direct photon in the final state in photoproduction allows to estimate the longitudinal fraction of the partons parti ... More
Presented by Prof. Yuji YAMAZAKI on 30 Aug 2016 at 17:25
Session: Session 3-I
Track: Forward physics and diffraction
The phenomenon of hard diffraction will be discussed. The measurements performed at the HERA and Tevatron colliders will be summarised. The first LHC data and prospects for new results, in particular the ones involving the forward proton tagging, will be presented.
Presented by Mr. Rafał STASZEWSKI on 30 Aug 2016 at 14:50
Session: Session 1-III
Track: Multi-particle correlations and fluctuations: from small to large systems
Metastable domains of topological charges can form in quark gluon plasma with approximate chiral symmetry restoration. These topological charges can change the chirality of quarks in the local domains. This can lead to observable charge separation along the direction of the strong magnetic field produced in the early stage of relativistic heavy-ion collisions. Measurement of charge separation can ... More
Presented by Dr. Jie ZHAO on 29 Aug 2016 at 14:50
Session: Session 1-I
Track: Multi-particle correlations and fluctuations: from small to large systems
We present STAR measurements of three-particle correlations for various harmonics in Au+Au collisions at RHIC. The quantity $\langle\cos(m\phi_1+n\phi_2-(m+n)\phi_3)\rangle$ is measured for inclusive charged particles as a function of collision centrality, $\sqrt{s_{NN}}$, transverse momentum $p_T$, pseudo-rapidity difference $\Delta\eta$, and harmonics (m and n). These observables provide detaile ... More
Presented by Mr. Prithwish TRIBEDY on 29 Aug 2016 at 10:15
Session: Session 3-II
Track: Forward physics and diffraction
The total pp cross sections is a fundamental property of the strong interaction which can not be calculated in perturbative QCD but only described based on phenomenological models. The ATLAS and CMS collaborations have recently measured the total inelastic proton-proton cross section at 13 TeV centre-of-mass energy in special data sets with a low interaction probability per bunch crossing. A ... More
Presented by Mr. Simon Holm STARK on 30 Aug 2016 at 17:00
Session: Session 1-IV
Track: Multi-particle correlations and fluctuations: from small to large systems
ALICE, an experiment dedicated to the analysis of heavy-ion collisions is ideally suited for femtoscopic analysis, with its excellent PID capabilities at low and intermediate momenta. It studies correlations of pions which provide crucial information on the size and the dynamics of the system. Recent results from p+p, p-Pb and Pb-Pb collisions will be discussed with emphasis on similarities a ... More
Presented by Prof. Adam KISIEL on 29 Aug 2016 at 16:10
Session: Session 5-I
Track: Collectivity in high-energy collisions: jets, flows or other
Saturation and geometrical scaling (GS) of gluon distributions are a consequence of the non-linear evolution equations of QCD. After a short theoretical introduction we confront the hypothesis of GS in different systems with experimental data.
Presented by Mr. Michal PRASZALOWICZ on 1 Sep 2016 at 10:10
Session: Session2-I
Track: Hadronic final state in high-pT interactions
The production of jets, photons and of gauge bosons in association with jets at hadron colliders provides a stringent test of perturbative QCD and can be used to probe the gluon density function of the proton. We present recent measurements of the inclusive jet cross section in data collected at center ­of ­mass energies of 8 TeV and 13 TeV. The measurements have been performed differentially i ... More
Presented by Mr. Marisilvia DONADELLI on 29 Aug 2016 at 08:55
Session: Session 2-II
Track: Hadronic final state in high-pT interactions
We present new results of analysis of $top$-quark differential cross sections obtained by the CMS and ATLAS Collaborations in $pp$ collisions at the LHC in the framework of $z$-scaling approach. The spectra are measured over a wide range of collision energy $\sqrt s~=~7,8,13$~TeV and transverse momentum $p_T= 30-1000$~GeV/c of $top$-quark using leptonic and jet decay modes. Proton constitue ... More
Presented by Prof. Mikhail TOKAREV on 30 Aug 2016 at 11:25
Session: Session 5-II
Track: Collectivity in high-energy collisions: jets, flows or other
The modification of jets in heavy ion collision at a center of mass energy of 2.76TeV was observed via various analyses carried out in Run I experiments at the LHC. In November 2016, LHC delivered the Run II phase lead-lead beams at 5.02TeV and proton-proton beams at the same energy for reference. The high luminosity PbPb data, more than twice of the previous run, provided an opportunity for elabo ... More
Presented by Mr. Yongsun KIM on 1 Sep 2016 at 12:15
Session: Session 3-II
Track: Forward physics and diffraction
In the era of searching for new discoveries at LHC, it is crucial to achieve a higher level of precision in understanding the proton structure which it will allow for most unambiguous interpretations of the high energy, luminous data ahead. The knowledge of proton's constituents mainly comes from the deep inelastic scattering data at HERA, complemented by the measurements from the fixed target, Te ... More
Presented by Dr. Voica RADESCU on 30 Aug 2016 at 16:10
Session: Session 2-II
Track: Hadronic final state in high-pT interactions
Many models of physics beyond Standard Model predict the existence of light Higgs states, dark photons, and new gauge bosons mediating interactions between dark sectors and the Standard Model. Using a full data sample collected with the BABAR detector at the PEP-II e+e- collider, we report searches for a light non-Standard Model Higgs boson, dark photon, and a new muonic dark force mediated by a g ... More
Presented by Prof. Romulus GODANG on 30 Aug 2016 at 11:05
Session: Session 2-II
Track: Hadronic final state in high-pT interactions
We compute the production of thermal photons in relativistic heavy-ion collisions by gluon fusion in the presence of an intense magnetic field, and during the early stages of the reaction. This photon yield is an excess over calculations that do not consider magnetic field effects. We add this excess to recent hydrodynamic calculations that are close to describing the experimental transverse mome ... More
Presented by Dr. Alejandro AYALA on 30 Aug 2016 at 12:15
Session: Session 5-II
Track: Collectivity in high-energy collisions: jets, flows or other
A brief overview of recent studies on heavy quarks as probes of the deconfined matter created in high energy nucleus-nucleus collisions is given, with focus on the most recent measurements at the LHC and RHIC and their understanding in theoretical models.
Presented by Dr. Anton ANDRONIC on 1 Sep 2016 at 11:00
Session: Conclusion
Presented by Dr. Bill GARY on 2 Sep 2016 at 11:35
Session: Session 1-II
Track: Multi-particle correlations and fluctuations: from small to large systems
There is good evidence for the presence of oscillation in counting statistics, in many different, apparently very disparate branches of physics. Examples include oscillations of the high-order cumulants of transport through a Mach-Zender interferometer as functions of the Aharonov-Bohm flux, and in transport through a double quantum dot as functions of the energy dealignment between the two quantu ... More
Presented by Dr. Grzegorz WILK on 29 Aug 2016 at 11:10
Session: Session 5-III
Track: Collectivity in high-energy collisions: jets, flows or other
The production of light flavour hadrons, mainly of strange particles has been studied intensively over the last decades as they are very promising probes to study the dynamics of the high-density state created in heavy-ion collisions. At LHC energies, a rather complete set of data for pp, p-Pb and Pb-Pb collisions is now available. Together with the results at lower collisions energies, a comprehe ... More
Presented by Dr. Helmut OESCHLER on 1 Sep 2016 at 14:25
Session: Flash Talk
Track: Flash Talks Session for Posters
Heavy quarks (charm and beauty) are essential probes of the evolution of the Quark-Gluon Plasma (QGP) created in heavy-ion collisions, because heavy-quark production in high-energy collisions occurs early compared to the formation time of the strongly-interacting partonic matter. Furthermore, separate measurements of beauty quarks from charm quarks can test the mass dependence of the parton energ ... More
Presented by Ms. Minjung KIM on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
Study of production of heavy flavours is regarded as an excellent probe to understand the properties of Quark-Gluon plasma produced in heavy-ion collision experiments. The measurements of heavy flavours need very high precision tracking and vertexing detectors. Inner Tracking System (ITS) of ALICE is used for vertex determination and tracking. The main tracking component of ITS consists of pixel c ... More
Presented by Mr. Jonghan PARK on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
The top quark mass is a fundamental parameter of the standard model and together with the W boson mass and the Higgs boson mass it provides a strong self-consistency check of the electroweak theory. Recently several new measurements of the top quark mass using alternative observables and reconstruction methods are performed by the CMS collaborations at the CERN LHC. Alternative methods can give a ... More
Presented by Dr. Ji Hyun KIM on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
Ridge is the well-known structure in two-particle azimuthal correlations at high-energy heavy-ion collisions. This structure is physically understood through elliptic and higher-order flows at nucleus-nucleus collisions. This structure also appears in small systems, such as proton-proton collisions, recently. However, Ridge structure in small system is hard to well-explain using hydrodynamics, sin ... More
Presented by Ms. Cho SOYEON on 29 Aug 2016 at 17:25
Session: Flash Talk
Track: Flash Talks Session for Posters
To investigate the properties of the high-density QCD matter in heavy-ion collisions, the measurement of heavy flavor production is one of attractive tools. In 2.76 and 5.02 TeV PbPb collisions, CMS measured the nuclear modification factor of $D^0$ mesons. We will present the dependence on the centrality and transverse momentum up to 100 GeV in this poster.
Presented by Dr. Hyunchul KIM on 29 Aug 2016 at 17:25
Session: Session 1-II
Track: Multi-particle correlations and fluctuations: from small to large systems
New CMS results on multi-particle correlations, identified particle spectra and correlations in pp and pPb collisions are presented. Evidence of collective phenomena in small collision systems is observed in high-multiplicity events, which provides strong constraint on theory calculations. The results are compared to PbPb collisions at similar multiplicities.
Presented by Dr. Quan WANG on 29 Aug 2016 at 11:35
Session: Session 6-I
Track: Proton structure, small and large-x physics
Multiparton interactions have been shown to play an important role in the hadronic interactions at very high energies. The theoretical description of such processes is possible under the assumption of the presence of sufficiently hard scales. The computation of the cross sections for the double parton scattering makes use of the double parton distribution functions which contain important inform ... More
Presented by Dr. Anna Maria STASTO on 1 Sep 2016 at 16:00
Session: Session 1-III
Track: Multi-particle correlations and fluctuations: from small to large systems
Hydrodynamic simulations are used to calculate the identical pion HBT radii, as a function of the pair transverse momentum. This dependence is sensitive to the magnitude of the collective radial flow in the transverse plane, and thus comparison to ALICE data enables us to derive its magnitude. By using hydro solutions with variable initial parameters we conclude that in this case fireball explosio ... More
Presented by Dr. Yuji HIRONO on 29 Aug 2016 at 14:00
Session: Session 5-I
Track: Collectivity in high-energy collisions: jets, flows or other
According to the flow narrative commonly applied to high-energy nuclear collisions a cylindrical-quadrupole component of 1D azimuth angular correlations is conventionally represented by quantity v2 and interpreted to represent elliptic flow. Jet angular correlations ("nonflow") may also contribute to v2 data depending on the method used to calculate v2, but 2D graphical methods are available to in ... More
Presented by Mr. Tom TRAINOR on 1 Sep 2016 at 09:45
Session: Flash Talk
Track: Flash Talks Session for Posters
The multiplicity distribution is described in terms of models incorporating the stochastic branching of quarks and gluons, along with fluctuations their production. Results show a reasonable description of data from the CMS collaboration at 0.9, 2.36, and 7 TeV for all pseudorapidity ranges. A prediction for 13 TeV is also given.
Presented by Dr. Wei Yang WANG on 29 Aug 2016 at 17:25
Session: Session 5-I
Track: Collectivity in high-energy collisions: jets, flows or other
We present results for longitudinal correlations (for collective flow and for the multiplicities) based on simple modeling of the initial stages of the collision. We discuss key ingredients needed to generate the necessary initial correlations in rapidity, with focus on the torque effect (decorrelation of the forward and backward event planes), and on the integral measures of the two-particle mult ... More
Presented by Dr. Wojciech BRONIOWSKI on 1 Sep 2016 at 09:20