Conveners
QGP in Small Systems I
- Jiangyong Jia (State University of New York (US))
Prof.
Charles Gale
(McGill University)
9/28/15, 5:00 PM
QGP in Small Systems
Contributed talk
Signatures usually associated with hydrodynamic behavior have been recently observed in high and intermediary multiplicity proton-nucleus (pA) collisions at the LHC. Even though these signals suggest the creation of a strongly coupled quark-gluon plasma (QGP) in such collisions, they do not represent concrete proof. In order to better address this problem, other signals must be...
Guo-Liang Ma
(Shanghai INstitute of Applied Physics (SINAP), CAS)
9/28/15, 5:20 PM
QGP in Small Systems
Contributed talk
We show that the incoherent elastic scattering of partons, as present in a multi-phase transport model (AMPT), with a modest parton-parton cross-section of $\sigma$=1.5-3 mb, naturally explains the long-range two-particle azimuthal correlations as observed in p+p and p+Pb collisions for all measured $N_{track}$ and $p_T$ bins by the LHC-CMS experiment [1]. We calculate the elliptic, $v_2$, and...
Guy Paic
(Universidad Nacional Autonoma (MX))
9/28/15, 5:40 PM
QGP in Small Systems
Contributed talk
Multi-parton interactions (MPI) and color reconnection (CR) have raised special interest due to the fact that they can produce QGP-like effects in small systems, specifically, flow-like patterns. Now we will show that the same mechanisms produce an explicit dependence of the $p_{\rm T}$ spectra with the number of constituent quarks. In addition, a Cronin-like peak, at intermediate transverse...
Quan Wang
(University of Kansas (US))
9/28/15, 6:00 PM
QGP in Small Systems
Contributed talk
Previous CMS measurements have demonstrated the collective nature of multiparticle correlations in high-multiplicity pPb collisions at the LHC. This collectivity is consistent with a hydrodynamic flow origin. However, it can also be interpreted in terms of initial state effects arising from gluon saturation. The pseudorapidity dependence of the azimuthal Fourier coefficients ($v_n$) is...
Antonio Ortiz Velasquez
(Universidad Nacional Autonoma (MX))
9/28/15, 6:20 PM
QGP in Small Systems
Contributed talk
Particle ratios provide insight into the hadrochemistry of the event and the mechanisms for particle production. In Pb-Pb collisions the relative multi-strange baryon yields exhibit an enhancement with respect to pp collisions, whereas the short-lived K$^{*0}$ resonance is suppressed in the most central events due to re-scattering. Measurements in p-Pb allow us to investigate the development...
shengli huang
(PHENIX Collaboration)
9/28/15, 6:40 PM
QGP in Small Systems
Contributed talk
Collisions of light with heavy ions have been considered control
experiments for heavy ion collisions, but measurements of long-range
azimuthal correlations of light hadrons in $p(d)$+A collisions at
RHIC and LHC challenge this assumption. Hydrodynamic model
calculations have been successful in describing experimental
results, though alternative explanations involving...
