2026-06-27T16:20:26Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/439282024-09-04T14:00:54Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Llanes Estrada, Felipe José
author
Torres Rincón, Juan Miguel
author
Cabrera Urban, Daniel
2023-06-20T03:34:35Z
2023-06-20T03:34:35Z
2011-10
0003-4916
10.1016/j.aop.2011.06.006
https://hdl.handle.net/20.500.14352/43928
http://dx.doi.org/10.1016/j.aop.2011.06.006
http://arxiv.org/abs/1104.3815http://www.sciencedirect.com
We compute the charm drag and diffusion coefficients in a hot pion gas, such as is formed in a heavy ion collision after the system cools sufficiently to transit into the hadron phase. We fully exploit heavy quark effective theory (with both D and D* mesons as elementary degrees of freedom during the collision) and chiral perturbation theory, and employ standard unitarization to reach higher temperatures. We find that a certain friction and shear diffusion coefficients are almost p(2)-independent at a fixed temperature which simplifies phenomenological analysis. At the higher end of reliability of our calculation, T similar or equal to 150 MeV, we report a charm relaxation length lambda(c) similar or equal to 40 fm, in agreement with the model estimate of He, Fries and Rapp. The momentum of a 1 GeV charm quark decreases about 50 MeV per fermi when crossing the hadron phase.
eng
Charm diffusion in a pion gas implementing unitarity, chiral and heavy quark symmetries.
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Llanes-Estrada_FJ08.pdf
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Llanes-Estrada_FJ08preprint.pdf
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Llanes-Estrada_FJ08.pdf.txt
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Llanes-Estrada_FJ08preprint.pdf.txt