Manifestation of a singlet heavy up-type quark in the branching ratios of rare decays K to πν\barν, B to πν\barν and B to K ν \barν

Details Manifestation of a singlet heavy up-type quark in the branching ratios of rare decays K to πν\barν, B to πν\barν and B to K ν \barν Manifestation of a singlet heavy up-type quark in the branching ratios of rare decays K to πν\barν, B to πν\barν and B to K ν \barν

2008-04-06

arxiv.org/abs/0804.0912v2

JETP Lett.87:517-523,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures. Submitted to the JETP Letters. A reference added, minor typos corrected

Scientific paper

10.1134/S0021364008100019

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 to \pi \nu \bar{\nu}, B to \pi \nu \bar{\nu} and B to 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 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.

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