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Title: Deconfinement as an entropic self-destruction: A solution for the quarkonium suppression puzzle?

Journal Article · · Physical Review. D, Particles, Fields, Gravitation and Cosmology
 [1]
  1. Stony Brook Univ., Stony Brook, NY (United States); Brookhaven National Lab., Upton, NY (United States)

The entropic approach to dissociation of bound states immersed in strongly coupled systems is developed. In such systems, the excitations of the bound state are often delocalized and characterized by a large entropy, so that the bound state is strongly entangled with the rest of the statistical system. If this entropy S increases with the separation r between the constituents of the bound state, S=S(r), then the resulting entropic force F=T ∂S/∂r (T is temperature) can drive the dissociation process. As a specific example, we consider the case of heavy quarkonium in strongly coupled quark-gluon plasma, where lattice QCD indicates a large amount of entropy associated with the heavy quark pair at temperatures 0.9Tc ≤ T ≤ 1.5Tc (Tc is the deconfinement temperature); this entropy S(r) grows with the interquark distance r. We argue that the entropic mechanism results in an anomalously strong quarkonium suppression in the temperature range near Tc. This entropic self-destruction may thus explain why the experimentally measured quarkonium nuclear modification factor at RHIC (lower energy density) is smaller than at LHC (higher energy density), possibly resolving the “quarkonium suppression puzzle”—all of the previously known mechanisms of quarkonium dissociation operate more effectively at higher energy densities, and this contradicts the data. As a result, we find that near Tc the entropic force leads to delocalization of the bound hadron states; we argue that this delocalization may be the mechanism underlying deconfinement.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG-88ER40388; AC02-98CH10886
OSTI ID:
1176989
Alternate ID(s):
OSTI ID: 1181494
Report Number(s):
BNL-107322-2015-JA; PRVDAQ; R&D Project: KB0301020
Journal Information:
Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 90, Issue 7; ISSN 1550-7998
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (9)

Free energy of a heavy quark-antiquark pair in a thermal medium from AdS/CFT journal March 2018
Entropic destruction of a moving heavy quarkonium journal July 2016
Single quark entropy and the Polyakov loop journal November 2016
Quark–antiquark entropic force and diffusion constant in a Yang–Mills-like theory journal June 2018
The Effects of Minimal Length, Maximal Momentum, and Minimal Momentum in Entropic Force journal January 2016
Free energy of a heavy quark-antiquark pair in a thermal medium from AdS/CFT text January 2018
Entropic destruction of a moving heavy quarkonium text January 2015
Free Energy of a Heavy Quark-Antiquark Pair in a Thermal Medium from AdS/CFT text January 2016
Single quark entropy and the Polyakov loop text January 2016

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