The new HERA data and the determination of the infrared behaviour of the BFKL amplitude

✍ Scribed by H. Kowalski; L.N. Lipatov; D.A. Ross; G. Watt

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 227 KB
• Volume: 854
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2010.10.002

✦ Synopsis

I this talk I discuss the new HERA data on the structure function F 2 obtained from a combination of H1 and ZEUS results. Their high precision allows to determine the infrared behaviour of the BFKL forward amplitude for gluon-gluon scattering. This amplitude leads to an excellent description of the new data at low values of x (< 0.01) and at the same time determines the unintegrated gluon density inside the proton, for squared transverse momenta of the gluon less than 100 GeV 2 . The phases of this amplitude are sensitive to the non-perturbative gluonic dynamics and to the presence of Beyond-the-Standard-Model particles at very high energies.