Stability of string configurations dual to quarkonium states in AdS/CFT

Avramis, SD; Sfetsos, K; Siampos, K

dc.contributor.author	Avramis, SD	en
dc.contributor.author	Sfetsos, K	en
dc.contributor.author	Siampos, K	en
dc.date.accessioned	2014-03-01T01:29:13Z
dc.date.available	2014-03-01T01:29:13Z
dc.date.issued	2008	en
dc.identifier.issn	0550-3213	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19168
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	LARGE-N LIMIT	en
dc.subject.other	DE-SITTER SUPERGRAVITY	en
dc.subject.other	GAUGE-THEORY	en
dc.subject.other	WILSON LOOPS	en
dc.subject.other	FINITE-TEMPERATURE	en
dc.subject.other	FIELD-THEORIES	en
dc.subject.other	QUARKS	en
dc.title	Stability of string configurations dual to quarkonium states in AdS/CFT	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.nuclphysb.2007.09.025	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.nuclphysb.2007.09.025	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	We extend our earlier work, regarding the perturbative stability of string configurations used for computing the interaction potential of heavy quarks within the gauge/gravity correspondence, to cover a more general class of gravity duals. We provide results, mostly based on analytic methods and corroborated by numerical calculations, which apply to strings in a general class of backgrounds that encompass boosted, spinning and marginally-deformed D3-brane backgrounds. For the case of spinning branes we demonstrate in a few examples that perturbative stability of strings may require strong conditions complementing those following by thermodynamic stability of the dual field theories. For marginally-deformed backgrounds, we find that even in the conformal case stability requires an upper value for the imaginary part a of the deformation parameter, whereas in regions of the Coulomb branch where there exists linear confinement we find that there exist stable string configurations for certain ranges of values of the parameter sigma. We finally discuss the case of open strings with fixed endpoints propagating in Rindler space, which turns out to have an exact classical-mechanical analog. (C) 2007 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Nuclear Physics B	en
dc.identifier.doi	10.1016/j.nuclphysb.2007.09.025	en
dc.identifier.isi	ISI:000253029400001	en
dc.identifier.volume	793	en
dc.identifier.issue	1-2	en
dc.identifier.spage	1	en
dc.identifier.epage	33	en