Optimizing the basis of B → K*ℓ+ℓ− observables in the full kinematic range

By S. Descotes-Genon, T. Hurth, J. Matias, J. Virto. Journal of High Energy Physics, 2013

373 citations recorded by the source corpus.

We discuss the observables for the B → K*(→ Kπ)ℓ+ℓ− decay, focusing on both CP-averaged and CP-violating observables at large and low hadronic recoil with special emphasis on their low sensitivity to form-factor uncertainties. We identify an optimal basis of observables that balances theoretical and experimental advantages, which will guide the New Physics searches in the short term. We discuss some advantages of the observables in the basis, and in particular their improved sensitivity to New Physics compared to other observables. We present predictions within the Standard Model for the observables of interest, integrated over the appropriate bins including lepton mass corrections. Finally, we present bounds on the S-wave contribution to the distribution coming from the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ B\to K_0^{*}{\ell^{+}}{\ell^{-}} $\end{document} decay, which will help to establish the systematic error associated to this pollution.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/173395238147097092e8606e61b2dac3587082da

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Citations in the corpus

Review of lepton universality tests in B decays (2018, background): “The coefficients that appear in the differential decay-rate expression can be combined to define new angular observables, P ′ i [117–119], that are largely free of form-factor uncertainties.”
B →Vℓ+ℓ− in the Standard Model from light-cone sum rules (2015, background): “Going beyond the SCET framework has become increasingly important since observables designed to minimise the impact of the soft FFs [9] are, of course, sensitive to 1/mb-corrections.”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, methodology): “An independent set of these, optimized at low-q(2), is given by the P (0) i basis [838, 840, 841].”
On the breaking of lepton flavor universality in B decays (2015, neutral): “Most notably, a ∼ 3σ deviation from the SM expectation has been reported by LHCb [9, 10] in the so-called P ′ 5 differential observable of B → K∗μ+μ− decays [11].”
On the impact of power corrections in the prediction of B → K*μ+μ− observables (2014, background): “[39]), and the second for the errors associated to ξ‖,⊥(q 2), inherited from the form factor input in the respective scheme.”
New physics in b → s μ + μ − after the measurement of R K * (2017, background): “They find results that deviate from the SM predictions, particularly in the angular observable P ′ 5 [10].”
Angular analysis of B d 0 → K∗μ+μ− decays in pp collisions at s√=8 TeV with the ATLAS detector (2018, background): “The form to express the differential decay amplitude as a function of the angular parameters uses coefficients that may be represented by the helicity or transversity amplitudes [17] and is written as2”
Continuing search for new physics in b → sμμ decays: two operators at a time (2019, neutral): “• The P ′ 5 anomaly: The values of the angular observable P ′ 5 [11, 12] in B → K∗μ+μ− decays, measured by the LHCb [13, 14] as well as ATLAS [15] collaboration in the 4.”
On the anomalies in the latest LHCb data (2016, background): “[33, 71], in which almost all observables are free from hadronic uncertainties which are related to the form factors.”
Patterns of New Physics in b → sℓ+ℓ− transitions in the light of recent data (2017, methodology): “In the central box, the predictions for RK are given for the bin [1,6] GeV(2), whereas RK∗ and Rφ are given in [1.”