dorsal/arxiv
View SchemaBaryon-to-entropy ratio in very high energy nuclear collisions
| Authors | K. J. Eskola, K. Kajantie |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9610015 |
| URL | https://arxiv.org/abs/nucl-th/9610015 |
| Journal | Z.Phys. C75 (1997) 515-522 |
Abstract
We compute as a function of rapidity $y$ the baryon number carried by quarks and antiquarks with $p_T > p_0 \approx$ 2 GeV produced in Pb+Pb collisions at TeV energies. The computation is carried out in lowest order QCD perturbation theory using structure functions compatible with HERA results. At $p_0=2$ GeV the initial gluon density is both transversally saturated and thermalised in the sense that the energy/gluon equals to that of an ideal gas with the same energy density. Even at these high energies the initial net baryon number density at $y=0$ at $\tau=0.1$ fm will be more than the normal nuclear matter density but the baryon-to-entropy ratio is only $(B-\bar B)/S\sim 1/5000$. Further evolution of the system is discussed and the final baryon-to-entropy ratio is estimated.
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"abstract": "We compute as a function of rapidity $y$ the baryon number carried by quarks\nand antiquarks with $p_T \u003e p_0 \\approx$ 2 GeV produced in Pb+Pb collisions at\nTeV energies. The computation is carried out in lowest order QCD perturbation\ntheory using structure functions compatible with HERA results. At $p_0=2$ GeV\nthe initial gluon density is both transversally saturated and thermalised in\nthe sense that the energy/gluon equals to that of an ideal gas with the same\nenergy density. Even at these high energies the initial net baryon number\ndensity at $y=0$ at $\\tau=0.1$ fm will be more than the normal nuclear matter\ndensity but the baryon-to-entropy ratio is only $(B-\\bar B)/S\\sim 1/5000$.\nFurther evolution of the system is discussed and the final baryon-to-entropy\nratio is estimated.",
"arxiv_id": "nucl-th/9610015",
"authors": [
"K. J. Eskola",
"K. Kajantie"
],
"categories": [
"nucl-th",
"hep-ph"
],
"journal_ref": "Z.Phys. C75 (1997) 515-522",
"title": "Baryon-to-entropy ratio in very high energy nuclear collisions",
"url": "https://arxiv.org/abs/nucl-th/9610015"
},
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