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The Dokshitzer–Gribov–Lipatov–Altarelli–Parisi (DGLAP) evolution equations are equations in QCD describing the variation of parton distribution functions with varying energy scales. [1] Experimentally observed scaling violation in deep inelastic scattering is important evidence for the correctness of the equations and of QCD in general. [1] 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. [2] Only later did it become known that an equivalent formula had been published in Russia by Yuri Dokshitzer in 1977, [3] and by Vladimir Gribov and Lev Lipatov in 1972. [4]
The DGLAP QCD evolution equations are widely used in global determinations of parton distributions, like those from the CTEQ or NNPDF collaborations.[ citation needed]
See also
References
- ^
a
b Thomson, Mark (2013).
Modern Particle Physics. Cambridge, United Kingdom: Cambridge University Press. §8.5.1 Scaling violations, pp. 201-202.
ISBN
978-1-107-03426-6.
OCLC
840462909.
{{ cite book}}: CS1 maint: date and year ( link) - ^ Altarelli, G.; Parisi, G. (1977-08-08). "Asymptotic freedom in parton language". Nuclear Physics B. 126 (2): 298–318. Bibcode: 1977NuPhB.126..298A. doi: 10.1016/0550-3213(77)90384-4. ISSN 0550-3213.
- ^ Yu. L. Dokshitzer. Sov. Phys. JETP 46:641 (1977).
- ^ V. N. Gribov, L. N. Lipatov. Sov. J. Nucl. Phys. 15:438 (1972).
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.
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