Chiral symmetry breaking as open string tachyon condensation

By R. Casero, E. Kiritsis, Angel Paredes. 2007

248 citations recorded by the source corpus.

Abstract We consider a general framework to study holographically the dynamics of fundamental quarks in a confining gauge theory. Flavors are introduced by placing a set of (coincident) branes and antibranes on a background dual to a confining color theory. The spectrum contains an open string tachyon and its condensation describes the U ( N f ) L × U ( N f ) R → U ( N f ) V symmetry breaking. By studying worldvolume gauge transformations of the flavor brane action, we obtain the QCD global anomalies and an IR condition that allows to fix the quark condensate in terms of the quark mass. We find the expected N f 2 Goldstone bosons (for m q = 0 ), the Gell-Mann–Oakes–Renner relation (for m q small) and the η ′ mass. Remarkably, the linear confinement behavior for the masses of highly excited spin-1 mesons, m n 2 ∼ n is naturally reproduced.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bbe40aab60b6e9ea0c8ae02ca3bd803c553d7235

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Citations in the corpus

Holographic Baryons Static Properties and Form Factors from Gauge/String Duality (2008, background): “(2.38) ∗) See Eq.”
Holographic models for QCD in the Veneziano limit (2011, background): “It has been proposed that the non-linear DBI-like actions proposed by Sen and others are the proper setup in order to study the holographic dynamics of chiral symmetry breaking, [48].”
Effective holographic theories for low-temperature condensed matter systems (2010, background): “It has been suggested, [40, 41], that this is the mechanism for chiral symmetry breaking in holographic QCD.”
Thermal transport and drag force in improved holographic QCD (2009, background): “3.1 Holographic computation and main results 12 3.2 Holographic explanation for the rise of ζ/s near Tc and the small black-hole branch 15 3.3 The adiabatic approximation 18 3.4 Buchel’s bound 20”
Strongly correlated quantum fluids: ultracold quantum gases, quantum chromodynamic plasmas and holographic duality (2012, methodology): “(i) Top down approach: In this approach, one starts from string theory and chooses an appropriate D-brane configuration to get as close as possible to the realistic QCD [89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110].”
Generalized holographic quantum criticality at finite density (2011, result): “er of options. The notion of \regularity" can however vary, and may include runaway behavior as in the case of holographic open string tachyon condensation relevant for chiral symmetry breaking, [6]. An important evolution of the holographic correspondence is the advent of the concept of Eectiv”
Improved holographic Yang–Mills at finite temperature: Comparison with data (2009, background): “Flavor can be eventually added in the form of Nf space-time filling D4 − D4 brane pairs, supporting U(Nf )L × U(Nf )R gauge fields and a bi-fundamental scalar [16].”
Improved Holographic QCD (2010, background): “Flavor can be eventually added in the form of Nf space-time filling D4−D4 brane pairs, supporting U(Nf )L × U(Nf )R gauge fields and a bi-fundamental scalar [17].”
Quantum critical lines in holographic phases with (un)broken symmetry (2012, background): “ected when what acts as parameters in single scalar models, may turn into varying parameters in multi-scalar models. Indeed that is what happens in tachyon models for chiral symmetry breaking of QCD, [47], where new phenomena like conformal transitions can appear, [48]. { 30 { The special class of h”
Dynamics of baryons from string theory and vector dominance (2007, background): “#19 Ref. [ 57 ] studied related issues in a more general D-branes/anti-D-branes setting which allows bare masses of matter fermions from open string tachyon field.”