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Title: Lattice NRQCD study on in-medium bottomonium spectra using a novel Bayesian reconstruction approach

We present recent results on the in-medium modification of S- and P-wave bottomonium states around the deconfinement transition. Our study uses lattice QCD with N{sub f} = 2 + 1 light quark flavors to describe the non-perturbative thermal QCD medium between 140MeV < T < 249MeV and deploys lattice regularized non-relativistic QCD (NRQCD) effective field theory to capture the physics of heavy quark bound states immersed therein. The spectral functions of the {sup 3}S{sub 1} (ϒ) and {sup 3}P{sub 1} (χ{sub b1}) bottomonium states are extracted from Euclidean time Monte Carlo simulations using a novel Bayesian prescription, which provides higher accuracy than the Maximum Entropy Method. Based on a systematic comparison of interacting and free spectral functions we conclude that the ground states of both the S-wave (ϒ) and P-wave (χ{sub b1}) channel survive up to T = 249MeV. Stringent upper limits on the size of the in-medium modification of bottomonium masses and widths are provided.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics, Sejong University, Seoul 143-747 (Korea, Republic of)
  2. Physics Department, Brookhaven National Laboratory, Upton, NY 11973 (United States)
  3. Institute for Theoretical Physics, Heidelberg University, Philosophenweg 16, 69120 Heidelberg (Germany)
Publication Date:
OSTI Identifier:
22499071
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; B QUARKS; BOTTOMONIUM; BOUND STATE; C QUARKS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; D QUARKS; ENTROPY; EUCLIDEAN SPACE; FLAVOR MODEL; GROUND STATES; MONTE CARLO METHOD; P WAVES; QUANTUM CHROMODYNAMICS; RELATIVISTIC RANGE; S WAVES; SPECTRAL FUNCTIONS; T QUARKS; U QUARKS