Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2012-02-03
Physics
High Energy Physics
High Energy Physics - Theory
17 pages, 4 figures, version 2: minor typos corrected, references added
Scientific paper
We revisit the problem of dipole-dipole scattering via exchanges of soft Pomerons in the context of holographic QCD. We show that a single closed string exchange contribution to the eikonalized dipole-dipole scattering amplitude yields a Regge behavior of the elastic amplitude; the corresponding slope and intercept are different from previous results obtained by a variational analysis of semi-classical surfaces. We provide a physical interpretation of the semi-classical worldsheets driving the Regge behavior for (-t)>0 in terms of worldsheet instantons. The latter describe the Schwinger mechanism for string pair creation by an electric field, where the longitudinal electric field E_L=\sigma_T tanh(\chi/2) at the origin of this non-perturbative mechanism is induced by the relative rapidity {\chi} of the scattering dipoles. Our analysis naturally explains the diffusion in the impact parameter space encoded in the Pomeron exchange; in our picture, it is due to the Unruh temperature of accelerated strings under the electric field. We also argue for the existence of a "micro-fireball" in the middle of the transverse space due to the soft Pomeron exchange, which may be at the origin of the thermal character of multiparticle production in ep/pp collisions. After summing over uncorrelated multi-Pomeron exchanges, we find that the total dipole-dipole cross section obeys the Froissart unitarity bound.
Basar Gokce
Kharzeev Dmitri E.
Yee Ho-Ung
Zahed Ismail
No associations
LandOfFree
Holographic Pomeron and the Schwinger Mechanism does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Holographic Pomeron and the Schwinger Mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holographic Pomeron and the Schwinger Mechanism will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-329507