Higher Twist Effects in Photon-Photon Collisions

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dc.creatorAhmadov, A. I.
dc.creatorBoztosun, I.
dc.creatorSoylu, A.
dc.creatorDadashov, E. A.
dc.date2006-11-29
dc.date.accessioned2026-07-07T11:58:55Z
dc.date.available2026-07-07T11:58:55Z
dc.descriptionIn this article, we investigate the contribution of the high twist Feynman diagrams to the large $p_{T}$ single pseudoscalar and vector mesons inclusive production cross section in two-photon collisions and we present the general formulae for the high and leading twist differential cross sections. The pion wave function where two non-trivial Gegenbauer coefficients $a_2$ and $a_4$ have been extracted from the CLEO data, Braun-Filyanov pion wave function, the asymptotic and the Chernyak-Zhitnitsky wave functions are used in the calculations. For $ρ$-meson we used Ball-Braun wave function. The results of all the calculations reveal that the high twist cross sections, the ratio R, the dependence transverse momentum $p_{T}$ and the rapidity $y$ of meson in $Φ_{CLEO}(x,Q^2)$ wave function case is very close to the $Φ_{asy}(x)$ asymptotic wave function case. It is shown that the high twist contribution to the cross section depends on the choice of the meson wave functions.
dc.descriptionREVTEX4, 23 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0611365
dc.identifierhttp://arxiv.org/abs/hep-ph/0611365
dc.identifierInt.J.Mod.Phys.E17:1041-1059,2008
dc.identifierdoi:10.1142/S0218301308010325
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206389
dc.subjectHigh Energy Physics - Phenomenology
dc.titleHigher Twist Effects in Photon-Photon Collisions
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