B-flavor tagging at Belle II

Authors

F. Abudinén, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
N. Akopov, Yerevan Physics Institute
A. Aloisio, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
V. Babu, Deutsches Elektronen-Synchrotron (DESY)
Sw Banerjee, University of Louisville
M. Bauer, Karlsruher Institut für Technologie
J. V. Bennett, University of Mississippi
F. U. Bernlochner, Universität Bonn
M. Bessner, University of Hawaiʻi at Mānoa
S. Bettarini, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
T. Bilka, Charles University
S. Bilokin, Ludwig-Maximilians-Universität München
D. Biswas, University of Louisville
D. Bodrov, HSE University
J. Borah, Indian Institute of Technology Guwahati
M. Bračko, Jozef Stefan Institute
P. Branchini, Istituto Nazionale di Fisica Nucleare - INFN
A. Budano, Istituto Nazionale di Fisica Nucleare - INFN
M. Campajola, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli

Document Type

Article

Publication Date

4-1-2022

Abstract

We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ([InlineMediaObject not available: see fulltext.]) mesons at Belle II. The algorithms provide essential inputs for measurements of quark-flavor mixing and charge-parity violation. We validate and evaluate the performance of the algorithms using hadronic [InlineMediaObject not available: see fulltext.] decays with flavor-specific final states reconstructed in a data set corresponding to an integrated luminosity of 62.8 fb- 1, collected at the [InlineEquation not available: see fulltext.] resonance with the Belle II detector at the SuperKEKB collider. We measure the total effective tagging efficiency to be εeff=(30.0±1.2(stat)±0.4(syst))%for a category-based algorithm and εeff=(28.8±1.2(stat)±0.4(syst))%for a deep-learning-based algorithm.

Relational Format

journal article

Recommended Citation

Abudinén, F., Akopov, N., Aloisio, A., Babu, V., Banerjee, Sw., Bauer, M., Bennett, J. V., Bernlochner, F. U., Bessner, M., Bettarini, S., Bilka, T., Bilokin, S., Biswas, D., Bodrov, D., Borah, J., Bračko, M., Branchini, P., Budano, A., Campajola, M., … Zupanc, A. (2022). B-flavor tagging at Belle II. The European Physical Journal C, 82(4), 283. https://doi.org/10.1140/epjc/s10052-022-10180-9

DOI

10.1140/epjc/s10052-022-10180-9

Accessibility Status

Searchable text