Manifestation of a singlet heavy up-tupe quark in the branching ratios of rare decays
![\boldsymbol{K\rightarrow\pi\nu\bar{\nu}}](/img/latex/65/65dd6efd266116cbebda4ffcaf4669cf-v2.png)
,
![\boldsymbol{B\rightarrow\pi\nu\bar{\nu}}](/img/latex/bb/bb4028af79baab317095853a2d6e5820-v2.png)
and
![\boldsymbol{B\rightarrow K\nu\bar{\nu}}](/img/latex/3c/3ce364d8725c32dd8c1d4070b7057e71-v2.png)
P. N. Kopnin+*, M. I. Vysotsky+
+Institute for theoretical and experimental physics, 117218 Moscow, Russia
*Moscow Institute of Physics and Technology (State University), 117303 Moscow, Russia
PACS: 12.15.-y, 12.60.-i, 13.20.-v
Abstract
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
,
and
decays. We show that the deviation from the Standard Model can be
up to 10% in the case of a 5 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.