The branching fraction of the rare Bs0→φμ+μ- decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 6 fb-1, respectively. The branching fraction is reported in intervals of q2, the square of the dimuon invariant mass. In the q2 region between 1.1 and 6.0 GeV2/c4, the measurement is found to lie 3.6 standard deviations below a standard model prediction based on a combination of light cone sum rule and lattice QCD calculations. In addition, the first observation of the rare Bs0→f2′(1525)μ+μ- decay is reported with a statistical significance of 9 standard deviations and its branching fraction is determined.

Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Branching Fraction Measurements of the Rare Bs0 →φμ+μ- And Bs0 → f2′ (1525)μ+μ- Decays. PHYSICAL REVIEW LETTERS, 127(15) [10.1103/PhysRevLett.127.151801].

Branching Fraction Measurements of the Rare Bs0 →φμ+μ- And Bs0 → f2′ (1525)μ+μ- Decays

Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Gotti C.;Martinazzoli L.;Martinelli M.;Meloni S.;Minotti A.;Petruzzo M.;Salomoni M.;Shields E. B.;
2021

Abstract

The branching fraction of the rare Bs0→φμ+μ- decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and 6 fb-1, respectively. The branching fraction is reported in intervals of q2, the square of the dimuon invariant mass. In the q2 region between 1.1 and 6.0 GeV2/c4, the measurement is found to lie 3.6 standard deviations below a standard model prediction based on a combination of light cone sum rule and lattice QCD calculations. In addition, the first observation of the rare Bs0→f2′(1525)μ+μ- decay is reported with a statistical significance of 9 standard deviations and its branching fraction is determined.
Articolo in rivista - Articolo scientifico
B physics; Flavor physics; Hadron-Hadron scattering (experiments);
English
2021
127
15
151801
none
Aaij, R., Abellan Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2021). Branching Fraction Measurements of the Rare Bs0 →φμ+μ- And Bs0 → f2′ (1525)μ+μ- Decays. PHYSICAL REVIEW LETTERS, 127(15) [10.1103/PhysRevLett.127.151801].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/338284
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