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2017

On lepton non-universality in exclusive $b\to s \ell\ell$ decays

Hurth, T., Mahmoudi, F., Santos, D. Martinez et al.

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The LHCb measurements of certain ratios of decay modes testing lepton flavour non-universality might open an exciting world of new physics beyond the standard model.

The latest LHCb measurements of R_K* offer some new insight beyond the previous measurement of R_K.
We work out the present significance for non-universality, and argue that claims of 5 sigma deviations from the SM based on all present b -> s l+l- data including the ratios are misleading and are at present still based on guesstimates of hadronic power corrections in the b -> s l+l- angular observables.
We demonstrate that only a small part of the luminosity of 50 fb^-1 foreseen to be accumulated by the LHCb will be needed to offer soon a definite answer to the present question whether we see a very small glimpse of lepton flavour non-universal new physics or not.

On lepton non-universality in exclusive $b\to s \ell\ell$ decays · Around

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Similar

T. Hurth and F. Mahmoudi, “On the LHCb anomaly in B → K ∗ ℓ + ℓ − B\to K^{*}\ell^{+}\ell^{-} ,” JHEP
Original
2014
Cited alongside, same era.
T. Hurth, F. Mahmoudi, and S. Neshatpour, “Global fits to b → s ℓ ℓ b\to s\ell\ell data and signs for lepton non-universality,” JHEP
Original
2014
Cited alongside, same era.
R. Alonso, B. Grinstein, and J. Martin Camalich, “ S U ( 2 ) × U ⁡ ( 1 ) SU(2)\times U(1) gauge invariance and the shape of new physics in rare B B decays,” Phys. Rev. Lett
Original
2014
Cited alongside, same era.
T. Huber, T. Hurth, and E. Lunghi, “Inclusive B ¯ → X s ℓ + ℓ − \bar{B}\to{X}_{s}{\ell}^{+}{\ell}^{-} : complete angular analysis and a thorough study of collinear photons,” JHEP
Original
2015
Cited alongside, same era.
W. Altmannshofer and D. M. Straub, “New physics in b → s b\to s transitions after LHC run 1,” Eur. Phys. J

Then

T. Hurth, F. Mahmoudi, and S. Neshatpour, “On the anomalies in the latest LHCb data,” Nucl. Phys
Original
2016
Later among the works it cites.
S. Descotes-Genon, L. Hofer, J. Matias, and J. Virto, “Global analysis of b → s ℓ ℓ b\to s\ell\ell anomalies,” JHEP
Original
2016
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M. Ciuchini, M. Fedele, E. Franco, S. Mishima, A. Paul, L. Silvestrini, and M. Valli, “ B → K ∗ ℓ + ℓ − B\to K^{*}\ell^{+}\ell^{-} decays at large recoil in the Standard Model: a theoretical reappraisal,” JHEP
Original
2016
Later among the works it cites.
B. Capdevila, S. Descotes-Genon, J. Matias, and J. Virto, “Assessing lepton-flavour non-universality from B → K ∗ ℓ ℓ B\to K^{*}\ell\ell angular analyses,” JHEP
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2016
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