Bottomonium spectrum at finite temperature - INSPIRE

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Bottomonium spectrum at finite temperature

Tim Harris
(
- Trinity Coll., Dublin
)
,
Sinéad M. Ryan
(
- Trinity Coll., Dublin
)
,
Gert Aarts
(
- Swansea U.
)
,
Chris Allton
(
- Swansea U.
)
,
Seyong Kim
(
- Sejong U.
)

Nov 13, 2013

7 pages

Part of Proceedings, 31st International Symposium on Lattice Field Theory (Lattice 2013) : Mainz, Germany, July 29-August 3, 2013, 171

Published in:

PoS LATTICE2013 (2014) 171

Contribution to:

- Lattice 2013
, 171

Published: 2014

e-Print:

1311.3208 [hep-lat]

DOI:

10.22323/1.187.0171

View in:

ADS Abstract Service

reference search5 citations

Citations per year

Abstract: (arXiv)

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

.

Note:

presented at the 31st International Symposium on Lattice Field Theory (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany

action: nonrelativistic
fermion: clover
temperature dependence
bottomonium: mass spectrum
spectral representation
finite temperature
temperature: deconfinement
dissociation
quark model: nonrelativistic
quark model

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