TY - JOUR
T1 - Understanding the p/π ratio at LHC due to QCD mass spectrum
AU - Noronha-Hostler, Jacquelyn
AU - Greiner, Carsten
N1 - Funding Information:
J. Noronha-Hostler acknowledges Fundação de Amparo à Pesquisa do Estado de São Paulo ( FAPESP 2011/08361-7 ) for financial support. This work was supported by the Bundesministerium für Bildung und Forschung ( BMBF ), HGS-HIRe and the Helmholtz International Center for FAIR within the framework of the LOEWE program launched by the State of Hesse.
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Thermal fits have consistently reproduced the experimental particle yields of heavy ion collisions, however, the proton to pion ratio from ALICE Pb. +. Pb sNN=2.76 TeV is over-predicted by thermal models - known as the p/π puzzle. Here we test the relevance of the extended mass spectrum, i.e., include Hagedorn states (resonances that follow an exponential mass spectrum and have very short life times) on the p/π puzzle. We find that the extended mass spectrum is able to reproduce particle ratios at both RHIC and the LHC as well as is able to match the lower p/π ratio at the LHC through dynamical chemical equilibration.
AB - Thermal fits have consistently reproduced the experimental particle yields of heavy ion collisions, however, the proton to pion ratio from ALICE Pb. +. Pb sNN=2.76 TeV is over-predicted by thermal models - known as the p/π puzzle. Here we test the relevance of the extended mass spectrum, i.e., include Hagedorn states (resonances that follow an exponential mass spectrum and have very short life times) on the p/π puzzle. We find that the extended mass spectrum is able to reproduce particle ratios at both RHIC and the LHC as well as is able to match the lower p/π ratio at the LHC through dynamical chemical equilibration.
KW - Dynamical hadronic interactions
KW - Extended mass spectrum
KW - Hadron resonance gas
KW - Hagedorn states
KW - Relativistic heavy-ion collisions
KW - Thermal fits
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U2 - 10.1016/j.nuclphysa.2014.08.101
DO - 10.1016/j.nuclphysa.2014.08.101
M3 - Article
AN - SCOPUS:84922287146
SN - 0375-9474
VL - 931
SP - 1108
EP - 1113
JO - Nuclear Physics A
JF - Nuclear Physics A
ER -