Fourth generation effects in the $B_s \to ν\barν γ$ decay

Details Fourth generation effects in the $B_s \to ν\barν γ$ decay Fourth generation effects in the $B_s \to ν\barν γ$ decay

2000-12-12

arxiv.org/abs/hep-ph/0012135v1

Phys.Lett. B505 (2001) 89-93

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, Latex

Scientific paper

10.1016/S0370-2693(01)00386-0

If the fourth generation fermions exist, the new quarks could influence the branching ratio of the decay $B_s \to \nu \bar{\nu} \gamma$. We obtain two solutions of the fourth generation CKM factor $V^*_{t's} V_{t'b}$ from the decay of $B \to X_s \gamma$. With these two solutions we calculate the new contributions of the fourth generation quark to Wilson coefficients of the decay $B_s \to \nu \bar{\nu} \gamma$. The branching ratio of the decay $B_s \to \nu \bar{\nu} \gamma$ in the two cases are calculated. In one case, our results are quite different from that of SM, but almost same in another case. If a fourth generation should exist in nature and nature chooses the former case, this B meson decay could provide a possible test of the fourth generation existence.

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