Conveners
Heavy Ions - Posters: Block I
- Martin Spousta (Charles University)
Studying the QCD matter produced under extreme condition of temperature and density called Quark Gluon Plasma (QGP) is among the important goal of heavy-ion collision experiments. QGP is a state where quarks and gluons are free to move inside a nuclear volume rather than only in nucleonic volume. Transition from hadronic state to QGP occur at the phase boundary where the critical temperature...
A. J. Silenko 1,2,3, P. Zhang 4, L. Zou 2
1 JINR, Dubna, Russia; 2 IMP CAS, Lanzhou, China; 3 INP BSU, Minsk, Belarus; 4 SPA SYSU, Zhuhai, China
An importance of twisted (vortex) particles in heavy-ion collisions is analyzed. Free twisted photons and electrons can possess giant intrinsic orbital angular momenta. Twisted photons have a nonzero effective mass [1] and are spatially...
We will discuss the sensitivity of the $\gamma \gamma \to \tau^+ \tau^-$ process in ultraperipheral Pb+Pb collisions on the anomalous magnetic moment of $\tau$ lepton ($a_{\tau}$) at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and considering semi-leptonic decays of both $\tau$ leptons in the fiducial volume...
Charm quarks are an excellent probe of the quark-gluon plasma created in heavy-ion collisions as they are produced at very early stages of such collisions and subsequently experience the whole evolution of the system. At the STAR experiment, charm quark production can be measured by direct topological reconstruction of open-charm hadrons thanks to the exceptional spatial resolution of the...
We consider two mechanisms for the light clusters production: the coalescence model and the thermal static model. The first one postulates that light nuclei are formed only at late times of the fireball evolution by recombination of protons and neutrons with close positions and velocities on the kinetic freeze-out surface. On the other hand, the thermal model assumes that there is a perfect...
Fluctuations of the proton number are measured in ulrarelativistic heavy-ion collisions as a proxy for the fluctuations of the number of baryons. In grand-canonical ensemble, the moments of the baryon number distribution are related to the derivatives of the logarithm of the partition function. In realistic situation corresponding to the measurements, the fluctuations are also determined by...
Quarkonia are an important probe into studying the properties of quark-gluon plasma. Proton-proton collisions serve as an essential baseline for studying the effects of quarkonia in proton-nucleon and nucleon-nucleon collisions. This poster presents the main characteristics of Upsilon mesons from Monte Carlo generation of proton-proton collisions at $\sqrt{s_\mathrm{NN}} = 500$ GeV. Monte...
