2014/11/14 by Sheldon L. Glashow, Diego Guadagnoli, Kenneth Lane · 3 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Electron #Lepton #Muon #Nuclear physics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.114.091801
published as Phys. Rev. Lett. 114, 091801 (2015) · 8 pages. Discussion of P'5 added; some discussion sharpened; discussion of decays with tau's modified; references added
arxiv created 2014/11/14 · openalex publication_date 2015/03/03 · arxiv updated 2015/03/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The LHCb Collaboration's measurement of RK=B(B+\ensuremath→K+\ensuremathμ+\ensuremathμ^\ensuremath-)/B(B+\ensuremath→K+e+e^\ensuremath-) lies 2.6\ensuremathσ 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\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-)exp/\phantom\rule0ex0exB(Bs\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-)SM\ensuremath≅RK\ensuremath≅0.75, is compatible with recent measurements of these rates. We stress the importance of searches for lepton flavor violations, especially for B\ensuremath→K\ensuremathμe, K\ensuremathμ\ensuremathτ, and Bs\ensuremath→\ensuremathμe, \ensuremathμ\ensuremathτ.