NLO corrections to the photon impact factor

✍ Scribed by Stefan Gieseke

• Book ID: 104354449
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 489 KB
• Volume: 121
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(03)01809-7

✦ Synopsis

We review the program of the calculation of next-to-leading order corrections to the virtual photon impact factor. Following a brief introduction we present some technical aspects for the various contributions. Recently obtained results for transversely polarised virtue! photons are discussed and an outline of how infrared divergences are cancelled is given. Implications of the subtraction of leading energy logarithms are discussed.

2. The calculational program

We focus our discussion on the example of y*y*scattering which may serve as the canonical example for a scattering process in perturbative QCD at very high energy and is sometimes referred to as the gold-plated process to test BFKL dynamics.