Angular analysis of Bs→f2′(1525 )(→K+K-)μ+μ- decays as a probe to lepton flavor universality violation
Abstract
The flavor anomalies reported in RK, RK*, P5′, and B (Bs→ϕ μ+μ-) indicate lepton flavor universality violation in b →s l+l- quark level transition decays. The deviation from the standard model prediction reported in the underlying flavor observables currently stands at the level of 2.5 σ , 2.4 σ , 3.3 σ , and 3.7 σ , respectively. In this context, we perform an angular analysis of the four-body differential decay of Bs→f2′(1525 )(→K+K-)μ+μ- in a model independent effective field theory framework. The decay mode Bs→f2′(1525 )l+l- undergoes similar b →s neutral current quark level transition and, in principle, can provide complementary information regarding lepton flavor universality violation in b →s l+l- quark level transition decays. We give predictions of various physical observables such as the branching ratio, the longitudinal polarization fraction, the forward-backward asymmetry, the angular observables P1, P2, P4′, P5′, and also the lepton flavor sensitive observables such as the ratio of branching ratio Rf2′, QFL,QA F B, Q1, Q2, Q4′, Q5′ for the Bs→f2′(1525 )(→K+K-)μ+μ- decay mode in the standard model and in the presence of several one-dimensional and two-dimensional new physics scenarios.
- Publication:
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Physical Review D
- Pub Date:
- May 2021
- DOI:
- 10.1103/PhysRevD.103.095007
- arXiv:
- arXiv:2009.06213
- Bibcode:
- 2021PhRvD.103i5007R
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 25 pages, 7 figures, additional details updated