On the Standard Model prediction for RK and RK*

By M. Bordone, G. Isidori, Andrea Pattori. 2016

268 citations recorded by the source corpus.

In this article a recent work is reviewed, where we evaluated the impact of radiative corrections in RK and RK*. We find that, employing the cuts presently applied by the LHCb Collaboration, such corrections do not exceed a few percent. Moreover, their effect is well described (and corrected) by existing Monte Carlo codes. Our analysis reinforces the interest of these observables as clean probe of physics beyond the Standard Model.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ce331dd97a24c5ab976ce03be5ce0129cbb5261d

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In Nuclear and High Energy Physics

Citations in the corpus

What is the scale of new physics behind the B-flavour anomalies? (2017, background): “We remark that the Standard Model (SM) theoretical uncertainty for RK(∗) is very small (few percent due to QED radiative corrections [7]).”
Continuing search for new physics in b → sμμ decays: two operators at a time (2019, methodology): “The SM predictions of RK and RK∗ are theoretically clean [6, 7], therefore the deviations of these measurements from the SM are clear indications of NP.”
Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era (2018, background): “The uncertainties from QED corrections are found to be at the percent level [348].”
Flavour anomalies after the RK∗ measurement (2017, background): “QED corrections give a small departure from unity which, however, does not exceed few percents [23].”
Review of lepton universality tests in B decays (2018, background): “3, ratios of branching fractions allow very precise tests of LU, as hadronic uncertainties in the SM predictions are largely reduced, QED corrections are controlled at the level of ∼ 1% [107], and experimental systematic uncertainties cancel to a large extent.”
Test of lepton universality with B0 → K*0ℓ+ℓ− decays (2017, methodology): “(Left) Comparison of the LHCb RK∗0 measurements with the SM theoretical predictions: BIP [26] CDHMV [27–29], EOS [30–32], flav.io [33–35] and JC [36].”
Patterns of New Physics in b → sℓ+ℓ− transitions in the light of recent data (2017, background): “Theoretical predictions in the SM for RK and RK∗ are very accurate: hadronic uncertainties cancel to a large extent and electromagnetic corrections have been estimated to be small and under control [40].”
Reconsidering the one leptoquark solution: flavor anomalies and neutrino mass (2017, background): “a deviation from the SM prediction [7] at the 10% level and a clear signpost to new physics.”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “The SM predictions are thus limited only by the size of the electromagnetic corrections [867].”
Test of lepton universality in beauty-quark decays (2021, methodology): “Bremsstrahlung emission in the decay of particles is simulated using the Photos software in the default configuration [158], which is observed to agree with an independent quantum electrodynamics calculation at the level of 1% [5].”
B-decay discrepancies after Moriond 2019 (2019, background): “Here the theoretical uncertainties are negligible [14] and the sensitivity is only limited by statistics at present.”
A global likelihood for precision constraints and flavour anomalies (2018, background): “Here we neglect the tiny theory uncertainties [39].”
B-decay anomalies in a composite leptoquark model (2016, background): “035(syst), compared to a SM value that is close to 1 [20, 21].”