An improved measurement of the decay B0s → μ+ μ− and searches for the decays B0 → μ+ μ− and B0s → μ+ μ− γ are performed at the LHCb experiment using data collected in proton-proton collisions at √s = 7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2 and 6 fb^−1, respectively. The B0s → μ+ μ− branching fraction and effective lifetime are measured to be B(B0s → μ+ μ−) = (3.09{−0.43}{+0.46}{−0.11}{+0.15}) × 10^−9 and τ(B0s → μ+ μ−) = (2.07 ± 0.29 ± 0.03) ps, respectively, where the uncertainties include both statistical and systematic contributions. No significant signal for B0 → μ+ μ− and B0s → μ+ μ− γ decays is found and the upper limits B(B0 → μ+ μ−) < 2.6 × 10^−10 and B(B0s → μ+ μ− γ) < 2.0 × 10^−9 at 95% confidence level are determined, where the latter is limited to the range m_μμ > 4.9 GeV/c^2. Additionally, the ratio between the B0 → μ+ μ− and B0s → μ+ μ− branching fractions is measured to be R_μ+μ− < 0.095 at 95% confidence level. The results are in agreement with the Standard Model predictions.

Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2022). Measurement of the B0s → μ+ μ− Decay Properties and Search for the B0 → μ+ μ− and B0s → μ+ μ− γ Decays. PHYSICAL REVIEW D, 105(1), 1-34 [10.1103/PhysRevD.105.012010].

Measurement of the B0s → μ+ μ− Decay Properties and Search for the B0 → μ+ μ− and B0s → μ+ μ− γ Decays

Capriotti, L.;Carbone, A.;Ferrari, F.;Galli, D.;Maccolini, S.;Manuzzi, D.;Patrignani, C.;Pisani, F.;Villa, A.;Zucchelli, S.;
2022

Abstract

An improved measurement of the decay B0s → μ+ μ− and searches for the decays B0 → μ+ μ− and B0s → μ+ μ− γ are performed at the LHCb experiment using data collected in proton-proton collisions at √s = 7, 8 and 13 TeV, corresponding to integrated luminosities of 1, 2 and 6 fb^−1, respectively. The B0s → μ+ μ− branching fraction and effective lifetime are measured to be B(B0s → μ+ μ−) = (3.09{−0.43}{+0.46}{−0.11}{+0.15}) × 10^−9 and τ(B0s → μ+ μ−) = (2.07 ± 0.29 ± 0.03) ps, respectively, where the uncertainties include both statistical and systematic contributions. No significant signal for B0 → μ+ μ− and B0s → μ+ μ− γ decays is found and the upper limits B(B0 → μ+ μ−) < 2.6 × 10^−10 and B(B0s → μ+ μ− γ) < 2.0 × 10^−9 at 95% confidence level are determined, where the latter is limited to the range m_μμ > 4.9 GeV/c^2. Additionally, the ratio between the B0 → μ+ μ− and B0s → μ+ μ− branching fractions is measured to be R_μ+μ− < 0.095 at 95% confidence level. The results are in agreement with the Standard Model predictions.
2022
Aaij, R., Abellán Beteta, C., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., et al. (2022). Measurement of the B0s → μ+ μ− Decay Properties and Search for the B0 → μ+ μ− and B0s → μ+ μ− γ Decays. PHYSICAL REVIEW D, 105(1), 1-34 [10.1103/PhysRevD.105.012010].
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C.A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/898503
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