Pion transition form factor in the constituent quark modelстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 сентября 2013 г.
Аннотация:We calculate the transition form factor of the neutral pion where one photon is
virtual and another photon is real in the model where the light constituent quark
mass and the quark-pion vertex are taken to be momentum independent. Radiative
corrections to the lowest order triangle quark Feynman amplitude are calculated.
The resummation of the lowest radiative corrections to the virtual photon vertex
is done by applying the Sudakov exponential hypothesis. Using fitting parameters,
the quark mass and the strong coupling constant, the results on the pion transition
form factor are compared with existing data published by CELLO, CLEO, BaBar
and Belle collaborations.