Angular analysis and differential branching fraction of the decay: B → K⁎μ+μ−

By K. Mazumdar. 2016

200 citations recorded by the source corpus.

Abstract Measurements of rare B meson decay properties provide an alternative approach to direct searches for physics beyond the Standard Model. These decays, which proceed through flavor-changing neutral currents, can have interferences from new physics through loop diagrams and hence an excellent probe. In particular, the angular distribution of the decay B → K ⁎ μ + μ − can be measured to estimate the forward-backward asymmetries of the muons, the longitudinal polarization fractions of K ⁎ and the differential branching fractions, as a function of the dimuon invariant mass. Results based on data recorded by the CMS experiment at centre-of-mass energy of 7 TeV are presented.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0ce177117f6900d055ab0473da8d01fcd3c3b4e1

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In Nuclear and High Energy Physics

Citations in the corpus

Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era (2018, methodology): “So far, no time-dependent measurement of the B0 s→ φμ+μ− decay has been performed due to the limited signal yield of 432 ± 24 in the Run 1 data sample [317].”
New Physics in $${\varvec{b \rightarrow s \ell ^+ \ell ^-}}$$ confronts new data on lepton universality (2019, unknown): “22 measurements of LHCb only, the most precise ones currently available for these observables.”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “Existing measurements show hints of deviations from the SM expectations in three different classes of measurements: in B ! K⇤μ+μ angular observables [899], in branching fractions of exclusive b ! sμμ decays (in particular Bs ! μ μ [900]), and in μ-e universality (LFU) tests [5, 6].”
Global analysis of b → sℓℓ anomalies (2015, methodology): “For our experimental inputs, we include only LHCb data for the exclusive modes considered here [4,9,24,31,33,66,94], as they dominate the current analysis of the anomalies and allow for a consistent inclusion of correlations.”
B-decay discrepancies after Moriond 2019 (2019, unknown): “sμμ flavour-changing neutral current (FCNC) transition [1, 2].”
On the anomalies in the latest LHCb data (2016, methodology): “In addition, a new analysis on the angular observables in Bs → φμ+μ− has been presented [2].”
Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction (2017, unknown): “Besides RK(∗) , other tensions with the SM predictions (at the 3σ level) are reported in b→ sμ+μ− transitions, in particular, in the rate of the decays B → K∗μ+μ− [208] and B s → φμ+μ− [209], and in the angular distributions of B → K∗μ+μ− [208, 210, 211].”
Effective description of general extensions of the Standard Model: the complete tree-level dictionary (2017, unknown): “These are not the only anomalies in b → s`+`− processes, with some discrepancies also in the angular distributions of B → K∗μ+μ− [65–67], or in the differential branching fractions of B → Kμ+μ− [65] and Bs → φμ+μ− [68].”
Combined explanations of the b→sμ+μ− and b→cτ−ν¯ anomalies: A general model analysis (2018, unknown): “b → sμ+μ−: discrepancies with the SM can be found in several observables in B → K∗μ+μ− [1–5] and B0 s → φμ+μ− [6, 7] decays, as well as in the observation of lepton flavour universality (LFU) violation in RK ≡ B(B+ → K+μ+μ−)/B(B+ → K+e+e−) [8] and RK∗ ≡ B(B0 → K∗0μ+μ−)/B(B0 → K∗0e+e−) [9].”
What is the scale of new physics behind the B-flavour anomalies? (2017, unknown): “The main observables are: i) the angular distributions of B → K∗μμ [1–3], ii) the rate of semi-leptonic decays such as B → K∗μμ [1] and Bs → φμμ [4] and iii) the lepton flavour universality (LFU) violating observables RK [5] and RK∗ [6], which are defined by the ratios B(B → K(∗)μμ)/B(B → K(∗)ee).”
Rare $B$ Decays as Tests of the Standard Model (2016, unknown): “The time-integrated observables measured by LHCb in this analysis are fully consistent with SM expectations [214].”
Explaining dark matter and B decay anomalies with an Lμ − Lτ model (2016, unknown): “Such anomalies include discrepancies in the B → K∗μ+μ− angular distribution [19, 36] (confirmed by a recent Belle result [37]), a reduced branching ratio for the decay mode Bs → φμ+μ− [38], as well as a hint for lepton flavor universality violation in B → Kμ+μ− vs.”
Review of lepton universality tests in B decays (2018, unknown): “More specifically, these NP explanations should reproduce the pattern of deviations observed in b→ s μ+μ− observables, such as the branching fractions inB→ Kμ+μ−, B→ K∗μ+μ− and B s→ φμ+μ− [122,129,130] as well as the B→ K∗μ+μ− angular observables [113,131–135].”
Patterns of New Physics in b → sℓ+ℓ− transitions in the light of recent data (2017, background): “[7] LHCb Collaboration, “Angular analysis and differential branching fraction of the decay B s → φμ+μ−,” arXiv:1506.”