1 research outputs found
Study of Baryon number transport using model simulations in collisions at LHC Energies
We report on the excitation function of anti-baryon to baryon ratios
(, {\alam /\lam} and {\axi / \xim}) in collisions at
{\sqrts} = 0.9, 2.76, 7 TeV from DPMJET-III, Pythia~8, EPOS~1.99, and EPOS-LHC
model simulations. To study the predictions of these models at {\sqrts} = 13.6
TeV. The anti-baryon to baryon ratios are extremely important for the study of
baryon number transport mechanisms. These ratios help determine the carriers of
the baryon number and in the extraction of baryon structure information. Even
though all models show a good agreement between model simulations and data, the
ratios extracted from DPMJET-III model closely describes data at all energies.
It is observed that these ratios converge to unity for various model
predictions. This convergence also indicates that the anti-baryon to baryon
ratios follow the mass hierarchy, such that the hyperon specie containing more
strange quarks ({\alam /\lam} and {\axi / \xim}) approaches unity faster than
specie containing fewer strange quarks (). It is also observed
that the ratio approaches unity more rapidly with the increase
in {\sqrts} energy. At lower energies we observe an excess production of
baryons over anti-baryons. However, this effect vanishes at higher energies due
to the baryon-anti-baryon pair production and the baryon-anti-baryon yield
becomes equal. Using model simulations, we additionally compute the asymmetry,
(A\equiv\frac{N_{p}-N_{\bar{p}}}N_{p}+N_{\bar{p}}}) for protons. The
asymmetry shows a decreasing trend with increase in energy from 0.9 to 7 TeV
for all energies. This asymmetry trend is confirmed by model predictions at
{\sqrts} = 13.6 TeV which will help to put possible constraints on model
calculations at {\sqrts} = 13.6 TeV once the Run-III data for LHC becomes
available.Comment: 14 pages, 8 figures, 2 table