This paper reports the first ATLAS measurement of the Bs0→ μμ effective lifetime. The measurement is based on the data collected in 2015–2016, amounting to 26.3 fb−1 of 13 TeV LHC proton-proton collisions. The proper decay-time distribution of 58 ± 13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the Bs0 effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the Bs0→ μμ lifetime is 0.99−0.07+0.42 (stat.) ± 0.17 (syst.) ps and it is found to be consistent with the Standard Model.

Aad, G., Abbott, B., Abeling, K., Abicht, N.J., Abidi, S.H., Aboulhorma, A., et al. (2023). Measurement of the Bs0→ μμ effective lifetime with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2023(9) [10.1007/JHEP09(2023)199].

Measurement of the Bs0→ μμ effective lifetime with the ATLAS detector

Cerri A.
Investigation
;
2023-01-01

Abstract

This paper reports the first ATLAS measurement of the Bs0→ μμ effective lifetime. The measurement is based on the data collected in 2015–2016, amounting to 26.3 fb−1 of 13 TeV LHC proton-proton collisions. The proper decay-time distribution of 58 ± 13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the Bs0 effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the Bs0→ μμ lifetime is 0.99−0.07+0.42 (stat.) ± 0.17 (syst.) ps and it is found to be consistent with the Standard Model.
2023
Aad, G., Abbott, B., Abeling, K., Abicht, N.J., Abidi, S.H., Aboulhorma, A., et al. (2023). Measurement of the Bs0→ μμ effective lifetime with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2023(9) [10.1007/JHEP09(2023)199].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1266194