Lepton universality violation by Kaluza-Klein neutrinos in b → sll transition
Recent measure of RK, involving the decays of b→sl+l−, by the LHCb at CERN strengthened the deviation from the Standard Model prediction. The best fit in the updated global analysis suggests that the muon specific Wilson coefficients C9bsμμ=−C10bsμμ should be about −0.41. In this paper, we show that...
| Published in: | Physics Letters B |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-07-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322002982 |
| Summary: | Recent measure of RK, involving the decays of b→sl+l−, by the LHCb at CERN strengthened the deviation from the Standard Model prediction. The best fit in the updated global analysis suggests that the muon specific Wilson coefficients C9bsμμ=−C10bsμμ should be about −0.41. In this paper, we show that the accumulate effects of KK modes of a singlet Dirac neutrino propagating in the large extra-dimensional space naturally provide C9bsll=−C10bsll to explain the anomaly. By taking the muon Yukawa coupling to be about 5, the fundamental scale in the extra-dimensional framework should be lowered down to about 20 TeV if there are two additional spatial dimensions. |
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| ISSN: | 0370-2693 |