Semiclassical solution to the BFKL equation with massive gluons

Abstract

In this paper we proceed to study the high energy behavior of a scattering amplitudes in the Yang-Mills theory with the Higgs mechanism for the gauge boson mass. The spectrum of the $j$-plane singularities of the $t$-channel partial waves, and corresponding eigenfunctions of the BFKL equation in leading log approximation (LLA), were previously calculated by us numerically in arXiv:1401.4671 . Here we develop a semiclassical approach and investigate the influence of the impact parameter exponential decrease, existing in this model, on the high energy asymptotic behaviour of the scattering amplitude. This approach is much simpler than the numerical calculations, and reproduces our earlier numerical results. The analytical (semianalytical) solutions which have been found in this paper, can be used to incorporate correctly the large impact parameter behavior in the framework of CGC/saturation approach. This behaviour is interesting as provides the high energy amplitude for the electroweak theory, which can be measured experimentally.

22 pages, 13 Figures

References in corpus (4)

• Covariant gauges without Gribov ambiguities in Yang-Mills theories
• Positivity violations in QCD
• BFKL Pomeron with massive gluons
• The Pomeranchuk Singularity and Vector Boson Reggeization in Electroweak Theory

Cited by in corpus (6)

• The Effect of the Infrared Phase of the Discrete BFKL Pomeron on Transverse Momentum Diffusion
• A functional RG approach for the BFKL Pomeron
• The Odderon in QCD with running coupling
• BFKL pomeron with massive gluons and running coupling
• Double non-perturbative gluon exchange: an update on the soft Pomeron contribution to pp scattering
• On the energy spectrum of the electroweak Pomeron