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High Energy Physics - Theory

arXiv:1107.2324 (hep-th)
[Submitted on 12 Jul 2011 (v1), last revised 21 Jul 2011 (this version, v2)]

Title:Conformal Phase Transitions at Weak and Strong Coupling

Authors:David Kutasov, Jennifer Lin, Andrei Parnachev
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Abstract:D3 and D7-branes intersecting in 2+1 dimensions give rise at low energies to N=4 supersymmetric Yang-Mills theory coupled to defect fermions in the fundamental representation. This theory undergoes a BKT-type phase transition from a conformal phase to one in which the fermions acquire a non-zero mass when the 't Hooft coupling of the N=4 SYM exceeds a critical value. To study this transition, we continue the parameters of the model to a regime where a gravitational description is valid. We use it to calculate the masses of mesons and the phase diagram as a function of temperature and chemical potential. We also comment on the relation of our discussion to the transition from the non-abelian Coulomb phase to a confining one believed to occur in QCD at a critical number of flavors.
Comments: 52 pages, harvmac; v2: references added
Subjects: High Energy Physics - Theory (hep-th); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1107.2324 [hep-th]
  (or arXiv:1107.2324v2 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.1107.2324
Journal reference: Nucl.Phys.B 858:155-195, 2012
Related DOI: https://doi.org/10.1016/j.nuclphysb.2012.01.004

Submission history

From: Andrei Parnachev [view email]
[v1] Tue, 12 Jul 2011 15:29:13 UTC (422 KB)
[v2] Thu, 21 Jul 2011 17:45:26 UTC (422 KB)
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