Lepton Flavor Violation in $B$ Decays? - INSPIRE

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Lepton Flavor Violation in $B$ Decays?

Nov 3, 2014

4 pages

Published in:

Phys.Rev.Lett. 114 (2015) 091801

Published: Mar 3, 2015

e-Print:

1411.0565 [hep-ph]

DOI:

10.1103/PhysRevLett.114.091801

Report number:

LAPTH-227-14,
CERN-PH-TH-2014-229

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Abstract: (APS)

The LHCb Collaboration’s measurement of RK=B(B+→K+μ+μ-)/B(B+→K+e+e-) lies 2.6σ below the Standard Model prediction. Several groups suggest this deficit to result from new lepton nonuniversal interactions of muons. But nonuniversal leptonic interactions imply lepton flavor violation in B decays at rates much larger than are expected in the Standard Model. A simple model shows that these rates could lie just below current limits. An interesting consequence of our model, that B(Bs→μ+μ-)exp/B(Bs→μ+μ-)SM≅RK≅0.75, is compatible with recent measurements of these rates. We stress the importance of searches for lepton flavor violations, especially for B→Kμe, Kμτ, and Bs→μe, μτ.

Note:

8 pages. Discussion of P'5 added; some discussion sharpened; discussion of decays with tau's modified; references added

12.60.Cn
11.30.Hv
13.20.He
interpretation of experiments: LHC-B
lepton: flavor: violation
B: decay
B: rare decay
B: radiative decay
B: semileptonic decay
decay: flavor changing

References(38)

Figures(0)

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