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

Autor: Aad, G., Abbott, B., Abeling, K., Abicht, N. J., Abidi, S. H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adam Bourdarios, C., Adamczyk, L., Addepalli, S. V., Addison, M. J., Adelman, J., Adiguzel, A., Adye, T., Affolder, A. A., Afik, Y., Agaras, M. N.
Zdroj: Journal of High Energy Physics; Sep2023, Vol. 2023 Issue 9, p1-32, 32p
Abstrakt: This paper reports the first ATLAS measurement of the B s 0 → 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 B s 0 effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B s 0 → 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. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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