P. N. Kopnin, M. I. Vysotskii, “Manifestation of a singlet heavy up-tupe quark in the branching ratios of rare decays $K\rightarrow\pi\nu\bar\nu$, $B\rightarrow\pi\nu\bar\nu$ and $B\rightarrow K\nu\bar\nu$”, Письма в ЖЭТФ, 2008, том 87, выпуск 10,страницы 605

Эта публикация цитируется в 7 статьях

ПОЛЯ, ЧАСТИЦЫ, ЯДРА

Manifestation of a singlet heavy up-tupe quark in the branching ratios of rare decays $K\rightarrow\pi\nu\bar\nu$, $B\rightarrow\pi\nu\bar\nu$ and $B\rightarrow K\nu\bar\nu$

P. N. Kopnin^ab, M. I. Vysotskii^a

^a Institute for Theoretical and Experimental Physics, Moscow, 117218, Russia
^b Moscow Institute of Physics and Technology (State University), Moscow, 117303, Russia

Аннотация: We investigate the implications of the model with a $SU(2)$-singlet up-type quark, heavy enough not to be produced at the LHC, namely, the contribution of the new quark to the branching ratios of the $K\rightarrow\pi\nu\bar\nu$, $B\rightarrow\pi\nu\bar\nu$ and $B \rightarrow K\nu\bar\nu$ decays. We show that the deviation from the Standard Model can be up to $10\%$ in the case of a $5\rm\ TeV$ quark. Precise measurements of these branching ratios at the future experiments will allow to observe the contributions of the new quark or to impose stronger constraints on its mass.

PACS: 12.15.-y, 12.60.-i, 13.20.-v

Поступила в редакцию: 03.04.2008

Язык публикации: английский