학술논문
Measurement of the Bs0→ μμ effective lifetime with the ATLAS detector
Document Type
article
Author
Aad, G; Abbott, B; Abeling, K; Abicht, NJ; Abidi, SH; Aboulhorma, A; Abramowicz, H; Abreu, H; Abulaiti, Y; Acharya, BS; Adam Bourdarios, C; Adamczyk, L; Addepalli, SV; Addison, MJ; Adelman, J; Adiguzel, A; Adye, T; Affolder, AA; Afik, Y; Agaras, MN; Agarwala, J; Aggarwal, A; Agheorghiesei, C; Ahmad, A; Ahmadov, F; Ahmed, WS; Ahuja, S; Ai, X; Aielli, G; Aikot, A; Ait Tamlihat, M; Aitbenchikh, B; Aizenberg, I; Akbiyik, M; Åkesson, TPA; Akimov, AV; Akiyama, D; Akolkar, NN; Al Khoury, K; Alberghi, GL; Albert, J; Albicocco, P; Albouy, GL; Alderweireldt, S; Aleksa, M; Aleksandrov, IN; Alexa, C; Alexopoulos, T; Alfonsi, F; Algren, M; Alhroob, M; Ali, B; Ali, HMJ; Ali, S; Alibocus, SW; Aliev, M; Alimonti, G; Alkakhi, W; Allaire, C; Allbrooke, BMM; Allen, JF; Allendes Flores, CA; Allport, PP; Aloisio, A; Alonso, F; Alpigiani, C; Alvarez Estevez, M; Alvarez Fernandez, A; Alves Cardoso, M; Alviggi, MG; Aly, M; Amaral Coutinho, Y; Ambler, A; Amelung, C; Amerl, M; Ames, CG; Amidei, D; Amor Dos Santos, SP; Amos, KR; Ananiev, V; Anastopoulos, C; Andeen, T; Anders, JK; Andrean, SY; Andreazza, A; Angelidakis, S; Angerami, A; Anisenkov, AV; Annovi, A; Antel, C; Anthony, MT; Antipov, E; Antonelli, M; Anulli, F; Aoki, M; Aoki, T; Aparisi Pozo, JA; Aparo, MA; Aperio Bella, L; Appelt, C
Source
Journal of High Energy Physics. 2023(9)
Subject
Language
Abstract
Abstract : This paper reports the first ATLAS measurement of the $$ {B}_s^0 $$ 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 $$ {B}_s^0 $$ B s 0 effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the $$ {B}_s^0 $$ B s 0 → μμ lifetime is $$ {0.99}_{-0.07}^{+0.42} $$ 0.99 − 0.07 + 0.42 (stat.) ± 0.17 (syst.) ps and it is found to be consistent with the Standard Model.