Rare $\Lambda _c\to p l ^+l ^-$ decay in the relativistic quark modelстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:The relativistic quark model based on the quasipotential approach with the
QCD-motivate potential is employed for the calculation of the form factors of
the $\Lambda_c\to p$ rare weak transitions. Their momentum dependence is
explicitly determined without additional assumptions and extrapolations in the
whole kinematical range of the momentum transfer squared $q^2$. The
differential $\Lambda_c\to p l^+l^-$ decay branching fractions and angular
distributions are calculated on the basis of these form factors. Both the
perturbative and effective Wilson coefficients, which include contributions of
vector meson resonances, are used. The calculated branching fraction of the
$\Lambda_c\to p \mu^+\mu^-$ rare decay is well consistent with the experimental
upper limit very recently set by the LHCb Collaboration.