An introduction to leading and next-to-leading BFKL

TL;DR

This paper introduces the BFKL equation, discusses recent advances including the calculation of large NLL corrections, and explores techniques for resumming these corrections, connecting to DGLAP evolution.

Contribution

It provides an accessible introduction to BFKL physics and recent developments, including NLL calculations and resummation techniques.

Findings

NLL corrections to BFKL are large

Resummation techniques have been proposed for NLL terms

Connection between BFKL and DGLAP evolution is discussed

Abstract

Of late, the field of BFKL physics has been the subject of significant developments. The calculation of the NLL terms was recently completed, and they turned out to be very large. Techniques have been proposed to resum these corrections. These lectures provide an introduction to the BFKL equation and some of the recent developments, using DGLAP evolution as the starting point.