Meson widths from string worldsheet instantons
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Author(s)
Faulkner, Thomas
Liu, Hong
Date Issued
February 2009
Journal
Physics Letters B
Publisher
Elsevier
Citation
Faulkner, Thomas, and Hong Liu. “Meson widths from string worldsheet instantons.” Physics Letters B 673.2 (2009): 161-165.
Version
Author's final manuscript
Abstract
We show that open strings living on a D-brane which lies outside an AdS black hole We show that open strings living on a D-brane which lies outside an AdS black hole can tunnel into the black hole through worldsheet instantons. These instantons have a simple interpretation in terms of thermal quarks in the dual Yang–Mills (YM) theory. As an application we calculate the width of a meson in a strongly coupled quark–gluon plasma which is described holographically as a massless mode on a D7 brane in AdS[subscript 5]×S[subscript 5]. While the width of the meson is zero to all orders in the View the 1/sqrt λ source expansion with λ the 't Hooft coupling, it receives non-perturbative contributions in View the 1/sqrt λ source from worldsheet instantons. We find that the width increases quadratically with momentum at large momentum and comment on potential phenomenological implications of this enhancement for heavy ion collisions. We also comment on how this non-perturbative effect has important consequences for the phase structure of the YM theory obtained in the classical gravity limit.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1016/j.physletb.2009.01.071
