Radiative B-decay as a test of CKM unitarity

Details Radiative B-decay as a test of CKM unitarity Radiative B-decay as a test of CKM unitarity

1994-06-30

arxiv.org/abs/hep-ph/9406424v1

Phys.Lett.B336:487-493,1994; ERRATUM-ibid.B340:266,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages (Latex) + 4 postscript figures (compressed, tared, uuencoded) included at the end of the paper - [please check before

Scientific paper

10.1016/0370-2693(94)90562-2

We point out that $R \equiv Br(b\rightarrow d \gamma)/Br(b\rightarrow s
\gamma)$ is a sensitive probe of possible violation of CKM unitarity. We
compute $R$ in a minimal extension of the Standard Model containing an
additional isosinglet charge ($-1/3$) quark, which leads to a deviation from
CKM unitarity.

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