Manifestation of a singlet heavy up-type quark in the branching ratios of rare decays K to \pi \nu \bar{\nu}, B to \pi \nu \bar{\nu} and B to K \nu \bar{\nu}

P. N. Kopnin; M. I. Vysotsky

doi:10.1134/s0021364008100019

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arXiv · 0804.0912

Manifestation of a singlet heavy up-type quark in the branching ratios of rare decays K to \pi \nu \bar{\nu}, B to \pi \nu \bar{\nu} and B to K \nu \bar{\nu}

P. N. Kopnin·M. I. Vysotsky

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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 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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P. N. Kopnin, M. I. Vysotsky. 2008-04-06. Manifestation of a singlet heavy up-type quark in the branching ratios of rare decays K to \pi \nu \bar{\nu}, B to \pi \nu \bar{\nu} and B to K \nu \bar{\nu}. https://doi.org/10.1134/s0021364008100019

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