Semiclassical Regge trajectories of noncritical string and large-N QCD

TY - JOUR

T1 - Semiclassical Regge trajectories of noncritical string and large-N QCD

AU - Makeenko, Yuri

AU - Olesen, Poul

PY - 2010/8/1

Y1 - 2010/8/1

N2 - By properly treating the path integral over the boundary value of the Liouville field (associated with reparametrizations of the boundary contour) in open string theory, we derive consistent off-shell scattering amplitudes in d = 26 dimensions. In d < 26 we consider a recently proposed boundary ansatz which reproduces a semiclassical correction to the classical string (known as the Lüscher term) and obtain in the semiclassical approximation a linear Regge trajectory with the intercept (d-2)/24. We associate it with the quarkantiquark Regge trajectory in large-N QCD and explain why it dominates over perturbative QCD when t >-few GeV2.

AB - By properly treating the path integral over the boundary value of the Liouville field (associated with reparametrizations of the boundary contour) in open string theory, we derive consistent off-shell scattering amplitudes in d = 26 dimensions. In d < 26 we consider a recently proposed boundary ansatz which reproduces a semiclassical correction to the classical string (known as the Lüscher term) and obtain in the semiclassical approximation a linear Regge trajectory with the intercept (d-2)/24. We associate it with the quarkantiquark Regge trajectory in large-N QCD and explain why it dominates over perturbative QCD when t >-few GeV2.

U2 - 10.1007/jhep08(2010)095

DO - 10.1007/jhep08(2010)095

M3 - Journal article

SN - 1126-6708

VL - 2010

SP - 095

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 8

ER -