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Bottomonium spectrum at finite temperature

Harris, Tim, , Aarts, Gert, , Kim, Seyong, others, Gert Aarts Orcid Logo

Volume: "LATTICE2013", Start page: 171

Swansea University Author: Gert Aarts Orcid Logo

Abstract

We investigate the modification of S and P wave states in the bottomonium spectrum above and below the deconfinement crossover temperature through their spectral functions obtained from the maximum entropy method. Anisotropic ensembles with $N_f=2+1$ Wilson clover fermions with tadpole-improvement a...

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Published: 2013
Online Access: http://inspirehep.net/record/1264271
URI: https://cronfa.swan.ac.uk/Record/cronfa22568
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Abstract: We investigate the modification of S and P wave states in the bottomonium spectrum above and below the deconfinement crossover temperature through their spectral functions obtained from the maximum entropy method. Anisotropic ensembles with $N_f=2+1$ Wilson clover fermions with tadpole-improvement are used while the bottom quark is treated with an improved non-relativistic action. We observe significant modifications of the P wave $\chi_{b1}$ ground state directly above the crossover temperature, $T_c$, while the S wave $\Upsilon$ ground state remains relatively unchanged up to temperatures of almost $2T_c$. This evidence supports earlier conclusions from our FASTSUM collaboration of the immediate dissociation of the P wave states above $T_c$ and the survival of the S wave ground states up to $2T_c$.
Item Description: @articleHarris:2013vfa, author = "Harris, Tim and Ryan, Sinéad M. and Aarts, Gert and Allton, Chris and Kim, Seyong and others", title = "Bottomonium spectrum at finite temperature", journal = "PoS", volume = "LATTICE2013", pages = "171", year = "2014", eprint = "1311.3208", archivePrefix = "arXiv", primaryClass = "hep-lat", SLACcitation = "%%CITATION = ARXIV:1311.3208;%%",
College: Faculty of Science and Engineering
Start Page: 171