Exclusive production of pions and the pion distribution amplitude

dc.contributorUniversidade Federal de Santa Catarina (UFSC)
dc.contributorUniversidade Federal Do Rio Grande Do sul
dc.contributorUniversidad de la República
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T02:00:34Z
dc.date.accessioned2022-12-19T21:01:48Z
dc.date.available2020-12-12T02:00:34Z
dc.date.available2022-12-19T21:01:48Z
dc.date.created2020-12-12T02:00:34Z
dc.date.issued2020-01-01
dc.identifierJournal of Physics G: Nuclear and Particle Physics, v. 47, n. 4, 2020.
dc.identifier1361-6471
dc.identifier0954-3899
dc.identifierhttp://hdl.handle.net/11449/200211
dc.identifier10.1088/1361-6471/ab6947
dc.identifier2-s2.0-85082428334
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5380845
dc.description.abstractConsidering, as a limit case, an approximately flat pion distribution amplitude, which is determined from the hardest, in momentum space, solution of the Bethe-Salpeter equation for the pion wave function, we compute the pion transition form factor Fπγγ ∗ (Q2) and the pion form factor F π(Q 2), taking into account the LO as well as NLO form of the hard coefficient function entering the leading-twist factorization formula. We also compute the exclusive photoproduction of pions pairs at high energies, γγ →π+π-, where perturbative QCD can be used to compute the hard scattering matrix elements. We verify that the existent data for exclusive pion production can be reasonably described as a function of such a flat distribution amplitude.
dc.languageeng
dc.relationJournal of Physics G: Nuclear and Particle Physics
dc.sourceScopus
dc.subjectnon-perturbative QCD
dc.subjectpion distribution amplitude
dc.subjectpion transition form factor
dc.titleExclusive production of pions and the pion distribution amplitude
dc.typeArtículos de revistas


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