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.

B-flavor tagging at Belle II / Abudinen, F., Akopov, N., Aloisio, A., Babu, V., Banerjee, S., Bauer, M., Bennett, J.V., Bernlochner, F.U., Bessner, M., Bettarini, S., Bilka, T., Bilokin, S., Biswas, D., Bodrov, D., Borah, J., Bracko, M., Branchini, P., Budano, A., Campajola, M., Casarosa, G., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 82:4(2022). [10.1140/epjc/s10052-022-10180-9]

B-flavor tagging at Belle II

Aloisio A.;Campajola M.;De Nardo G.;Merola M.;
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.
2022
B-flavor tagging at Belle II / Abudinen, F., Akopov, N., Aloisio, A., Babu, V., Banerjee, S., Bauer, M., Bennett, J.V., Bernlochner, F.U., Bessner, M., Bettarini, S., Bilka, T., Bilokin, S., Biswas, D., Bodrov, D., Borah, J., Bracko, M., Branchini, P., Budano, A., Campajola, M., Casarosa, G., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 82:4(2022). [10.1140/epjc/s10052-022-10180-9]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/884649
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