Structure function evolution at next-to-leading order and beyond

✍ Scribed by Andreas Vogt

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 206 KB
• Volume: 79
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/s0920-5632(99)00645-3

✦ Synopsis

Results are presented of two studies addressing the scaling violations of deep-inelastic structure functions. Factorization-scheme independent fits to all ep and #p data on F2 are performed at next-to-leading order (NLO), yielding as (Mz) = 0.114 :t= 0.002exp (-t-0.006-0.004)th. In order to reduce the theoretical error dominated by the renormalization-scale dependence, the next-higher order (NNLO) needs to be included. For the flavour non-singlet sector, it is shown that available calculations provide sufficient information for this purpose at x > 10 -2.