Phenomenology of light- and strange-quark simultaneous production at high energies
Abdel Nasser Tawfik; Hayam Yassin; Eman R. Abo Elyazeed;
Abstract
This letter presents an extension of EPL116(2017)62001 to light- and
strange-quark nonequilibrium chemical phase-space occupancy factors
($\gamma_{q,s}$). The resulting damped trigonometric functionalities relating
$\gamma_{q,s}$ to the nucleon-nucleon center-of-mass energies $(\sqrt{s_{NN}})$
looks very similar except different coefficients. The phenomenology of the
resulting $\gamma_{q,s}(\sqrt{s_{NN}})$ describes a rapid decrease at
$\sqrt{s_{NN}}\lesssim7~$GeV followed by a faster increase up to $\sim20~$GeV.
Then, both $\gamma_{q,s}$ become nonsensitive to $\sqrt{s_{NN}}$. Although
these differ from $\gamma_{s}(\sqrt{s_{NN}})$ obtained at
$\gamma_q(\sqrt{s_{NN}})=1$, various particle ratios including
$\mathrm{K}^+/\pi^+$, $\mathrm{K}^-/\pi^-$, $\mathrm{\Lambda}/\pi^-$,
$\bar{\mathrm{\Lambda}}/\pi^-$, $\mathrm{\Xi}^+/\pi^+$, and
$\mathrm{\Omega}/\pi^-$, can well be reproduced, as well. We conclude that
$\gamma_{q,s}(\sqrt{s_{NN}})$ should be instead determined from fits of various
particle yields and ratios but not merely from fits to the particle ratio
$\mathrm{K}^+/\pi^+$.
strange-quark nonequilibrium chemical phase-space occupancy factors
($\gamma_{q,s}$). The resulting damped trigonometric functionalities relating
$\gamma_{q,s}$ to the nucleon-nucleon center-of-mass energies $(\sqrt{s_{NN}})$
looks very similar except different coefficients. The phenomenology of the
resulting $\gamma_{q,s}(\sqrt{s_{NN}})$ describes a rapid decrease at
$\sqrt{s_{NN}}\lesssim7~$GeV followed by a faster increase up to $\sim20~$GeV.
Then, both $\gamma_{q,s}$ become nonsensitive to $\sqrt{s_{NN}}$. Although
these differ from $\gamma_{s}(\sqrt{s_{NN}})$ obtained at
$\gamma_q(\sqrt{s_{NN}})=1$, various particle ratios including
$\mathrm{K}^+/\pi^+$, $\mathrm{K}^-/\pi^-$, $\mathrm{\Lambda}/\pi^-$,
$\bar{\mathrm{\Lambda}}/\pi^-$, $\mathrm{\Xi}^+/\pi^+$, and
$\mathrm{\Omega}/\pi^-$, can well be reproduced, as well. We conclude that
$\gamma_{q,s}(\sqrt{s_{NN}})$ should be instead determined from fits of various
particle yields and ratios but not merely from fits to the particle ratio
$\mathrm{K}^+/\pi^+$.
Other data
Title | Phenomenology of light- and strange-quark simultaneous production at high energies | Authors | Abdel Nasser Tawfik ; Hayam Yassin ; Eman R. Abo Elyazeed | Keywords | High Energy Physics - Phenomenology;High Energy Physics - Phenomenology | Issue Date | 19-May-2017 | Journal | Phys. Part. Nucl. Lett. 14 (2017), no 6, 843-848 | DOI | 6 843 http://arxiv.org/abs/1705.06961v1 14 10.1134/S154747711706019X |
Scopus ID | 2-s2.0-85036590909 |
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