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Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset

Publication ,  Journal Article
Collaboration, BII; Abudinén, F; Adachi, I; Adak, R; Adamczyk, K; Ahlburg, P; Ahn, JK; Aihara, H; Akopov, N; Aloisio, A; Ameli, F; Andricek, L ...
May 15, 2020

This document presents the measurement of $B^0$ meson lifetimes using the 2019 Belle II dataset that corresponds to an integrated luminosity of $8.7 \pm 0.2$ fb$^{-1}$. Each candidate is fully reconstructed with hadronic decay final states on the signal side, while the rest-of-event technique allows to infer the decay vertex position on the other (tag) side. $B^0$ lifetime is extracted from an unbinned maximum likelihood fit to the distribution of the difference between the signal side $B^0$ candidate and the tag side decay times. The measured lifetime is $\tau_{B^0} = 1.48 \pm 0.28 \pm 0.06 $ ps, where the first uncertainty is statistical and the second is systematic.

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Publication Date

May 15, 2020
 

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Collaboration, B. I. I., Abudinén, F., Adachi, I., Adak, R., Adamczyk, K., Ahlburg, P., … Watanabe, M. (2020). Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset.
Collaboration, Belle I. I., F. Abudinén, I. Adachi, R. Adak, K. Adamczyk, P. Ahlburg, J. K. Ahn, et al. “Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset,” May 15, 2020.
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, et al. Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset. 2020 May 15;
Collaboration BII, Abudinén F, Adachi I, Adak R, Adamczyk K, Ahlburg P, Ahn JK, Aihara H, Akopov N, Aloisio A, Ameli F, Andricek L, Ky NA, Asner DM, Atmacan H, Aulchenko V, Aushev T, Aushev V, Aziz T, Babu V, Bacher S, Baehr S, Bahinipati S, Bakich AM, Bambade P, Banerjee S, Bansal S, Barrett M, Bartel W, Batignani G, Baudot J, Beaulieu A, Becker J, Behera PK, Bender M, Bennett JV, Bernieri E, Bernlochner FU, Bertemes M, Bessner M, Bettarini S, Bhardwaj V, Bhuyan B, Bianchi F, Bilka T, Bilokin S, Biswas D, Bobrov A, Bondar A, Bonvicini G, Bozek A, Bračko M, Branchini P, Braun N, Briere RA, Browder TE, Brown DN, Budano A, Burmistrov L, Bussino S, Campajola M, Cao L, Caria G, Casarosa G, Cecchi C, Červenkov D, Chang M-C, Chang P, Cheaib R, Chekelian V, Chen YQ, Chen Y-T, Cheon BG, Chilikin K, Cho H-E, Cho K, Cho S-J, Choi S-K, Choudhury S, Cinabro D, Corona L, Cremaldi LM, Cuesta D, Cunliffe S, Czank T, Dash N, Dattola F, Cruz-Burelo EDL, Nardo GD, Nuccio MD, Pietro GD, Sangro RD, 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Measurement of the $B^0$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset. 2020 May 15;

Publication Date

May 15, 2020