2012/05/03 by P. K. Khandai, P. Sett, Khandai, P. K. +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Nuclear Theory (nucl-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.48550/arxiv.1205.0648
pages 18, Figures 11
openalex publication_date 2012/05/03 · arxiv created 2012/06/29 · arxiv updated 2012/07/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a systematic study of transverse mass spectra (mT) of mesons and baryons at RHIC and LHC energies. In an earlier study, it was shown that all the mesons produced in p+p and d+Au collisions at √sNN = 200 GeV follow mT scaling while in Au+Au collisions at same energy the mesons with strange and charm quark contents do not follow mT scaling which can be attributed to medium modifications. We extend this study for baryons produced in all above colliding systems at √sNN = 200 GeV. Although all available baryon spectra behave differently from mesons but are found to scale with protons for both p+p and d+Au collisions. In case of Au+Au collisions, the strange baryons behave differently from protons. This study has also been performed on the meson spectra in p+p collisions at 62.4 GeV which lies in between the highest RHIC energy and SPS energy where the mT scaling was first observed and we arrive at same conclusions as those at 200 GeV. We test the mT scaling at LHC with the first meson spectra measured in p+p collisions at 900 GeV and find that the mT spectra of kaons and ϕ do not scale with pions. Thus mT scaling which was working well up to p+p collisions at 200 GeV seems to be broken. Here we use all data measured in the mid rapidity region. Baryon to meson ratio is studied as a function of mT, at different energies and for different systems and is found that this ratio for p+p at 900 GeV is quite different from that in p+p collisions at RHIC energies.