TY - JOUR

T1 - Chiral dynamics and meson with non-commutative dipole field in gauge/gravity dual

AU - Huang, Wung Hong

PY - 2008/7/24

Y1 - 2008/7/24

N2 - Apply the T-duality and smeared twist to the D3-brane solution one can construct the supergravity backgrounds which may dual to supersymmetric or non-supersymmetric non-commutative dipole field theory. We introduce D7-brane probe into the dual supergravity background to study the chiral dynamics and meson spectrum therein. We first find that the non-commutative dipole field does not induce the chiral symmetry breaking even if the supersymmetry was completely broken, contrast to the conventional believing that the chiral symmetry will be broken in the non-supersymmetric theory. Next, we find that the dipole field does not modify the meson spectrum in the supersymmetric theory while it will reduce the meson bound-state energy in the non-supersymmetric theory. We also evaluate the static quark-anti-quark potential and see that the dipole field has an effect to produce attractive force between the quark and anti-quark.

AB - Apply the T-duality and smeared twist to the D3-brane solution one can construct the supergravity backgrounds which may dual to supersymmetric or non-supersymmetric non-commutative dipole field theory. We introduce D7-brane probe into the dual supergravity background to study the chiral dynamics and meson spectrum therein. We first find that the non-commutative dipole field does not induce the chiral symmetry breaking even if the supersymmetry was completely broken, contrast to the conventional believing that the chiral symmetry will be broken in the non-supersymmetric theory. Next, we find that the dipole field does not modify the meson spectrum in the supersymmetric theory while it will reduce the meson bound-state energy in the non-supersymmetric theory. We also evaluate the static quark-anti-quark potential and see that the dipole field has an effect to produce attractive force between the quark and anti-quark.

UR - http://www.scopus.com/inward/record.url?scp=46449120564&partnerID=8YFLogxK

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U2 - 10.1016/j.physletb.2008.05.069

DO - 10.1016/j.physletb.2008.05.069

M3 - Article

AN - SCOPUS:46449120564

SN - 0370-2693

VL - 665

SP - 271

EP - 276

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 4

ER -