• Source: DGLAP evolution equations

The Dokshitzer–Gribov–Lipatov–Altarelli–Parisi (DGLAP) evolution equations are equations in QCD describing the variation of parton distribution functions with varying energy scales. Experimentally observed scaling violation in deep inelastic scattering is important evidence for the correctness of the equations and of QCD in general. The equations were first published in the western world by Guido Altarelli and Giorgio Parisi in 1977, and so are still sometimes called the Altarelli–Parisi equations. Only later did it become known that an equivalent formula had been published in Russia by Yuri Dokshitzer in 1977, and by Vladimir Gribov and Lev Lipatov in 1972.
The DGLAP QCD evolution equations are widely used in global determinations of parton distributions, like those from the CTEQ or NNPDF collaborations.




See also


Jet (particle physics)
HERA
APFEL (Software)




References






Further reading


Martin, Alan D. (2008). "Proton Structure, Partons, QCD, DGLAP and Beyond" (PDF). Acta Physica Polonica B. 39 (9): 2025–2062. arXiv:0802.0161. Bibcode:2008AcPPB..39.2025M.




External links


Guido Altarelli (2009) QCD evolution equations for parton densities. Scholarpedia, 4(1):7124.

Kata Kunci Pencarian:

• DGLAP evolution equations
• Giorgio Parisi
• Lev Lipatov
• Vladimir Gribov
• Evolution equations in high-energy particle physics
• APFEL (software)
• List of Russian physicists
• Glossary of string theory
• NNPDF
• Guido Altarelli