This paper reports the first ATLAS measurement of the B-s(0) -> mu mu effective lifetime. The measurement is based on the data collected in 2015-2016, amounting to 26.3 fb(-1) of 13TeV 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 B-s(0) effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B-s(0) -> mu mu 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 $$ {B}_s^0 $$ → μμ effective lifetime with the ATLAS detector. JOURNAL OF HIGH ENERGY PHYSICS, 2023(9) [10.1007/jhep09(2023)199].

Measurement of the $$ {B}_s^0 $$ → μμ effective lifetime with the ATLAS detector

B. Di Micco;R. Di Nardo;F. Montereali;D. Orestano;
2023-01-01

Abstract

This paper reports the first ATLAS measurement of the B-s(0) -> mu mu effective lifetime. The measurement is based on the data collected in 2015-2016, amounting to 26.3 fb(-1) of 13TeV 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 B-s(0) effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B-s(0) -> mu mu 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 $$ {B}_s^0 $$ → 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/11590/462730
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