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Title: N=1 SQCD-like theories with N_f massive flavors from AdS/CFT and beta functions
Author: Barranco, Alejandro
Pallante, Elisabetta
Russo, J. G. (Jorge Guillermo)
Keywords: Camps de galga (Física)
Relativitat (Física)
Models de corda
Gauge fields (Physics)
Relativity (Physics)
String models
Issue Date: Sep-2011
Publisher: Springer Verlag
Abstract: We study new supergravity solutions related to large-N c N=1 supersymmetric gauge field theories with a large number N f of massive flavors. We use a recently proposed framework based on configurations with N c color D5 branes and a distribution of N f flavor D5 branes, governed by a function N f S(r). Although the system admits many solutions, under plausible physical assumptions the relevant solution is uniquely determined for each value of x ≡ N f /N c . In the IR region, the solution smoothly approaches the deformed Maldacena-Núñez solution. In the UV region it approaches a linear dilaton solution. For x < 2 the gauge coupling β g function computed holographically is negative definite, in the UV approaching the NSVZ β function with anomalous dimension γ 0 = −1/2 (approaching − 3/(32π 2)(2N c  − N f )g 3)), and with β g  → −∞ in the IR. For x = 2, β g has a UV fixed point at strong coupling, suggesting the existence of an IR fixed point at a lower value of the coupling. We argue that the solutions with x > 2 describe a"Seiberg dual" picture where N f  − 2N c flips sign.
Note: Reproducció del document publicat a:
It is part of: Journal of High Energy Physics, 2011, vol. 1109, p. 086
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ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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