Backreacting flavors in the Klebanov-Strassler background

Benini, Francesco; Cremonesi, Stefano; Canoura, Felipe; Ramallo, Alfonso V.; Núñez, Carlos

doi:10.1088/1126-6708/2007/09/109

Cited by 117 publications

(190 citation statements)

References 44 publications

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“…When µ q /m q → ∞ the meson masses coincide with those obtained for the massless flavored model of [23]. We can use the WKB formulas (F.14) and (F. 20) for the spectrum at the endpoints of the renormalization group flow to estimate the variation generated in the meson masses by changing the sea quark mass m q and switching on and off gradually the screening effects. It is interesting to point out that, within the WKB approximation, the ratio of these masses only depends on the number of flavors, and is given by:…”

Section: Meson Spectrumsupporting

confidence: 56%

“…Therefore, this approach is valid in the so-called Veneziano limit [18], in which both N and N f are large and their ratio N f /N is fixed. The smearing procedure was successfully applied to obtain supergravity solutions that include flavor backreaction in several systems [19][20][21] (see [22] for a detailed review and further references).…”

Section: Introductionmentioning

confidence: 99%

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Unquenched massive flavors and flows in Chern-Simons matter theories

Bea

Conde

Jokela

et al. 2013

J. High Energ. Phys.

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We construct a holographic dual to the three-dimensional ABJM Chern-Simons matter theory with unquenched massive flavors. The flavor degrees of freedom are introduced by means of D6-branes extended along the gauge theory directions and delocalized in the internal space. To find the solution we have to solve the supergravity equations of motion with the source terms introduced by the D6-branes. The background we get is a running solution representing the renormalization group flow between two fixed points, at the IR and the UV, in both of which the geometry is of the form AdS 4 × M 6 , where M 6 is a six-dimensional compact manifold. Along the flow, N = 1 supersymmetry is preserved and the flavor group is Abelian. The flow is generated by changing the quark mass m q . When m q → ∞ we recover the original unflavored ABJM solution, while for m q → 0 our solution becomes asymptotically equivalent to the one found recently for massless smeared flavors. We study the effects of the dynamical quarks as their mass is varied on different observables, such as the holographic entanglement entropy, the quark-antiquark potential, the two-point functions of high dimension bulk operators, and the mass spectrum of mesons. * yago.bea@fpaxp1.es † econdepe@ulb.ac.be ‡ niko.jokela@usc.es § alfonso@fpaxp1.usc.es

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Section: Meson Spectrumsupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Unquenched massive flavors and flows in Chern-Simons matter theories

Bea

Conde

Jokela

et al. 2013

J. High Energ. Phys.

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“…Many of the symmetry properties of the theory were reproduced and the running gauge coupling correctly matches gauge theory expectations. These methods were extended to the general SU (N ) × SU (M ) theory in [118]. Again symmetry properties and the running gauge coupling of the field theory were correctly reproduced on the gravity side.…”

Section: Klebanov's Dualsmentioning

confidence: 99%

Mesons in gauge/gravity duals

et al. 2008

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Abstract. We review recent progress in studying mesons within gauge/gravity duality, in the context of adding flavour degrees of freedom to generalizations of the AdS/CFT correspondence. Our main focus is on the "top-down approach" of considering models constructed within string theory. We explain the stringtheoretical constructions in detail, aiming at non-specialists. These give rise to a new way of describing strongly coupled confining large-N gauge theories similar to large-N QCD. In particular, we consider gravity dual descriptions of spontaneous chiral symmetry breaking, and compare with lattice results. A further topic covered is the behaviour of flavour bound states in finite-temperature field theories dual to a gravity background involving a black hole. We also describe the "bottom up" phenomenological approach to mesons within AdS/QCD. Some previously unpublished results are also included.PACS. 11.15.-q Gauge field theories -11.25.Tq Gauge/string duality -12.40.Yx Hadron mass models and calculations -14.40.-n Mesons

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“…The Landau pole argument, on the other hand, reflects an integrated number of degrees of freedom over some region in the throat. Flavor symmetries can be obtained by adding D7 branes in the Klebanov-Strassler throat, and solutions have been found for backreacting smeared flavor branes [41]. For our purposes, it is enough to consider probe branes, and to simply use an approximate metric:…”

Section: The Klebanov-strassler Cascading Geometrymentioning

confidence: 99%

Randall-Sundrum and strings

Reece

Wang

2010

J. High Energ. Phys.

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We investigate stringy excitations in Randall-Sundrum effective theories for electroweak symmetry breaking arising from embedding in string theory. RS is dual to a confining gauge theory, which we expect to have "QCD strings," or color flux tubes. Stringy constructions of RS-like theories allow us to investigate the mass of these string states, which typically grows with a small fractional power of the number of colors N of the dual gauge theory. There are two known strong constraints on N for RS-like theories. The first arises from demanding that the Standard Model gauge couplings do not have a Landau pole at low scales. The second arises from demanding that the first-order confining phase transition in the early universe is able to proceed without leaving an empty universe, i.e. that the rate of bubble nucleation is not too small. We find that these constraints on N imply that string states are generically at most a factor of a few heavier than the lightest KK states, and we cannot selfconsistently remain in the limit N, λ 1. We examine various string constructions of AdS or RS-like backgrounds, including orbifolds, theories on M5-branes, theories on D4-branes, and the recent F-theory construction of Polchinski and Silverstein. In every case we find that there are strong bounds on the mass of new stringy states. We briefly discuss important phenomenological implications due to the presence of such light stringy excitations, such as precision electroweak and flavor observables, as well as collider signals.

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Backreacting flavors in the Klebanov-Strassler background

Cited by 117 publications

References 44 publications

Unquenched massive flavors and flows in Chern-Simons matter theories

Unquenched massive flavors and flows in Chern-Simons matter theories

Mesons in gauge/gravity duals

Randall-Sundrum and strings

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