Prof.
Viacheslav Kuvshinov
(NAS)
05/10/2015, 18:30
Status of QCD
Poster
V.I.Kuvshinov
It is shown that in the model of stochastic QCD vacuum colour quark confinement can be described as decoherence of pure colour state of the particle into the mixed quantum state with equal probabilities for different colours as a result of density marix evolution. Quantum functions of Purity, Fidelity and Fon Neiman entropy for one- and multi-particles states are calculated.
Dr
Adam Kardos
(University of Debrecen)
05/10/2015, 18:35
Status of QCD
Poster
In this talk I present the computer implementation of a general framework
for NNLO calculations using the ColorFul NNLO subtraction scheme. This
implementation identifies all singular regions automatically, assigns
counter terms to them and if equipped with a phase space integrator,
provides predictions for any IR-safe differential observable. The
numerical framework will be...
Prof.
Zack Sullivan
(Illinois Institute of Technology)
05/10/2015, 18:40
High Energy and High Pt Interactions
Poster
We present a new scheme for tagging b-jets with p_T > 500 GeV called "mu_x tagging." At the LHC, the primary method to tag b-jets relies on tracking their charged constituents. However, when highly boosted, track-based b-tags lose efficiency, and the probability to mistag light jets rises dramatically. Using muons from B hadron decay and defining a particular combination "x" of angular...
Mr
Sumit BASU
(Variable Energy Cyclotron Centre)
05/10/2015, 18:45
Multiparticle Correlations and Fluctuations
Poster
Non-statistical event-by-event fluctuations in relativistic heavy ion collisions have been proposed as probe of phase instabilities near the QCD phase transition. The observable νdyn, which is given in terms of the moments of identified-particle multiplicity distributions, is used to quantify the magnitude of the dynamical fluctuations in event-by-event measurements of given particle ratios....
Mr
Niccolo Moggi
(University of Bologna)
05/10/2015, 18:50
Astroparticle Physics
Poster
The CUORE experiment, expected to start operations in early 2016, will search for neutrinoless double beta decay of 130Te and will be one of the most competitive neutrinoless double beta decay experiments in the near future.
Its demonstrator (CUORE-0) has reported in 2015 no evidence for neutrinoless double-beta decay and placed a lower bound on the decay half-life, T(0ν)1/2>2.7×10^24 yr at...
fabio anulli
(INFN Sezione di Roma)
05/10/2015, 18:55
Status of QCD
Poster
The BABAR Collaboration has an extensive program of studying hadronic cross sections in e+e- collisions at low-energies, which are accessible at center-of-mass energy of about 10.6 GeV via initial-state radiation. Our measurements allow significant improvements in the precision of the predicted value of the muon anomalous magnetic moment. We report here the most recent results on several...
Dr
Andrii Verbytskyi
(Max-Planck-Institut für Physik)
05/10/2015, 19:00
Status of QCD
Poster
A summary of measurements of the fragmentation of charm quarks into a
specific hadron is given. Measurements performed in photoproduction and deep inelastic scattering in e+-p, pp and e+e- collisions are compared, using up-to-date branching ratios. Within uncertainties, all measurements agree, supporting the hypothesis that fragmentation is independent of the specific production process. ...
Prof.
Dick Greenwood
(ATLAS)
05/10/2015, 19:05
Status of QCD
Poster
We present new measurements of the associated production of quarkonium
with a vector boson or an additional quarkonium state using the ATLAS
Run-1 dataset. These rare processes provide new insight into QCD
models of quarkonium production, but also provide new opportunities to
study double parton scattering, including cross-section measurements
in single and double parton scattering...
Prof.
Dick Greenwood
(ATLAS)
05/10/2015, 19:10
Status of QCD
Poster
We present a new measurement of BBbar hadron production at the LHC
using the inclusive decay modes B(Bbar)->Jpsi+X->mumu+X and Bbar(B)-
>mu+X. Using this three muon final state differential cross sections
are presented, giving new constraints on B hadron production
kinematics in particular at small separation angles between the bb~
pair. Further corrections are also determined to allow...
Dr
Mikhail Barabanov
(JINR)
05/10/2015, 19:15
Status of QCD
Poster
The spectroscopy of exotics states with hidden charm together with the spectroscopy of charmed and stranged baryons is discussed. It is a good testing tool for the theories of strong interactions, including: QCD in both the perturbative and non-perturbative regimes, LQCD, potential models and phenomenological models. An understanding of the baryon spectrum is one of the primary goals of...
Mr
Wei Yang Wang
(National University of Singapore (NUS))
05/10/2015, 19:20
Multiparticle Correlations and Fluctuations
Poster
A new distribution is obtained from the Generalised Multiplicity Distribution (GMD). This distribution is derived by a weighted sum of the GMD over the initial number of gluons, removing the dependence of the model on a specific initial state for QCD evolution. The distribution is shown to describe multiplicity data at various LHC energies, possibly providing information on gluon production....
Mr
Qixiang Leong
(National University of Singapore)
05/10/2015, 19:25
Multiparticle Correlations and Fluctuations
Poster
A new distribution is obtained from a convolution of the Generalized Multiplicity Distribution (GMD) with the Negative Binomial Distribution (NBD). This distribution models the charged particle production from hard and soft processes, with comparisons made with other multiplicity distribution models. A phenomenologically analogous Lee-Yang phase transition is examined using the new model.
Prof.
Georg Wolschin
(Institut für Theoretische Physik)
05/10/2015, 19:30
Collective Phenomena in High Energy Collisions
Poster
The statistical hadronization (or thermal) model yields good results when compared to e.g. hadron production rates in LHC heavy-ion data. However, the distribution functions in p_T, rapidity y and eta clearly show deviations from thermal behaviour.
Such non-equilibrium effects can to a certain extent be accounted for in a relativistic diffusion model with three sources - two fragmentation...
Mr
Michal Krelina
(FNSPE, Czech Technical University in Prague)
05/10/2015, 19:35
Collective Phenomena in High Energy Collisions
Poster
We investigate nuclear effects in production of Drell-Yan pairs and direct photons in proton-nucleus collisions. For the first time, these effects are studied within the color dipole approach using the Green function formalism which naturally incorporates the color transparency and quantum coherence effects. Numerical results for the nuclear modification factor are compared with available...
Dr
Victor Goncalves
(Lund University/Sweden and UFPel/Brazil)
05/10/2015, 19:40
Collective Phenomena in High Energy Collisions
Poster
Using the color dipole formalism we study production of direct photons and Drell-Yan pairs in pA interactions. Real photons and lepton pairs produced in a hard scattering are not accompanied with any final state interaction, either energy loss or absorption. Consequently, the associated observables may serve as more efficient and cleaner probes for nuclear modification effects than inclusive...
Dr
Alexander Bylinkin
(MIPT)
05/10/2015, 19:45
Collective Phenomena in High Energy Collisions
Poster
The transverse momentum spectra of hadrons produced in high energy collisions can be decomposed into the two components: the exponential ("thermal") and the power ("hard") ones. Thus, charged hadron spectra produced in proton-proton and heavy-ion collisions from ISR to LHC are considered simultaneously within this model. The parameters of the model are found to vary with the type of the...
Dr
Amaresh Jaiswal
(GSI Helmholtzzentrum für Schwerionenforschung)
05/10/2015, 19:50
Collective Phenomena in High Energy Collisions
Starting from the Boltzmann equation in the relaxation time approximation and employing a Chapman-Enskog like expansion for the distribution function close to equilibrium, we derive second-order evolution equations for the shear stress tensor and the dissipative charge current for a system of massless quarks and gluons. The transport coefficients are obtained exactly using quantum statistics...
Mr
Sumit BASU
(Variable Energy Cyclotron Centre)
05/10/2015, 19:55
Collective Phenomena in High Energy Collisions
Poster
Temperature fluctuations may have two distinct origins, first, quantum fluctuations that are initial state fluctuations, and second, thermodynamical fluctuations. We discuss a method of extracting the thermodynamic temperature from the mean transverse momentum of pions, by using controllable parameters such as centrality of the system, and range of the transverse momenta. Event-by-event...
