B$-flavor tagging at Belle II

Eur. Phys. J. C 82, 283 (2022) We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ($B$) mesons at Belle II. The algorithms provide essential inputs for measurements of quark-flavor mixing and charge-parity violation. We validate and evaluate the perf...

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Hauptverfasser:	Abudinén, F, Akopov, N, Babu, V, Banerjee, Sw, Bauer, M, Bennett, J. V, Bernlochner, F. U, Bettarini, S, Bilka, T, Bilokin, S, Bodrov, D, Borah, J, Bračko, M, Branchini, P, Budano, A, Campajola, M, Casarosa, G, Chekelian, V, Chen, C, Chen, Y. Q, Cho, H. -E, Cunliffe, S, De Nardo, G, De Pietro, G, de Sangro, R, Dey, S, Di Canto, A, Di Capua, F, Dong, T. V, Ecker, P, Eliachevitch, M, Ferber, T, Ganiev, E, Gaz, A, Gelb, M, Gemmler, J, Godang, R, Goldenzweig, P, Graziani, E, Hara, K, Hershenhorn, A, Higuchi, T, Hill, E. C, Humair, T, Junkerkalefeld, H, Kato, Y, Keck, T, Kiesling, C, Kim, C. -H, Komarov, I, Kraetzschmar, T. M. G, Krohn, J. F, Kumar, J, Kumara, K, Kurz, S, La Licata, C, Laurenza, M, Lautenbach, K, Lieret, K, Liu, Q. Y, Longo, S, Maggiora, M, Manoni, E, Marinas, C, Martini, A, Meier, F, Metzner, F, Milesi, M, Miyabayashi, K, Mohanty, G. B, Mueller, F, Murphy, C, Oxford, E. R, Park, S. -H, Passeri, A, Pham, F, Piilonen, L. E, Pokharel, S, Pulvermacher, C, Rados, P, Ritter, M, Santelj, L, Sato, Y, Schwartz, A. J, Sevior, M. E, Soffer, A, Stroili, R, Sutcliffe, W, Tagnani, D, Takizawa, M, Tamponi, U, Tenchini, F, Torassa, E, Urquijo, P, Vitale, L, Yusa, Y, Zani, L, Zhou, Q. D, Žlebčík, R, Zupanc, A
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Sprache:	eng
Schlagworte:	Physics - High Energy Physics - Experiment
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creator	Abudinén, F Akopov, N Babu, V Banerjee, Sw Bauer, M Bennett, J. V Bernlochner, F. U Bettarini, S Bilka, T Bilokin, S Bodrov, D Borah, J Bračko, M Branchini, P Budano, A Campajola, M Casarosa, G Chekelian, V Chen, C Chen, Y. Q Cho, H. -E Cunliffe, S De Nardo, G De Pietro, G de Sangro, R Dey, S Di Canto, A Di Capua, F Dong, T. V Ecker, P Eliachevitch, M Ferber, T Ganiev, E Gaz, A Gelb, M Gemmler, J Godang, R Goldenzweig, P Graziani, E Hara, K Hershenhorn, A Higuchi, T Hill, E. C Humair, T Junkerkalefeld, H Kato, Y Keck, T Kiesling, C Kim, C. -H Komarov, I Kraetzschmar, T. M. G Krohn, J. F Kumar, J Kumara, K Kurz, S La Licata, C Laurenza, M Lautenbach, K Lieret, K Liu, Q. Y Longo, S Maggiora, M Manoni, E Marinas, C Martini, A Meier, F Metzner, F Milesi, M Miyabayashi, K Mohanty, G. B Mueller, F Murphy, C Oxford, E. R Park, S. -H Passeri, A Pham, F Piilonen, L. E Pokharel, S Pulvermacher, C Rados, P Ritter, M Santelj, L Sato, Y Schwartz, A. J Sevior, M. E Soffer, A Stroili, R Sutcliffe, W Tagnani, D Takizawa, M Tamponi, U Tenchini, F Torassa, E Urquijo, P Vitale, L Yusa, Y Zani, L Zhou, Q. D Žlebčík, R Zupanc, A
description	Eur. Phys. J. C 82, 283 (2022) We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ($B$) 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 $B$ decays with flavor-specific final states reconstructed in a data set corresponding to an integrated luminosity of $62.8$ fb$^{-1}$, collected at the $\Upsilon$(4$S$) resonance with the Belle II detector at the SuperKEKB collider. We measure the total effective tagging efficiency to be $\varepsilon_{\rm eff} = \big(30.0 \pm 1.2(\text{stat}) \pm 0.4(\text{syst})\big)\%$ for a category-based algorithm and $\varepsilon_{\rm eff} = \big(28.8 \pm 1.2(\text{stat}) \pm 0.4(\text{syst})\big)\%$ for a deep-learning-based algorithm.
doi_str_mv	10.48550/arxiv.2110.00790
format	Article
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U</au><au>Bettarini, S</au><au>Bilka, T</au><au>Bilokin, S</au><au>Bodrov, D</au><au>Borah, J</au><au>Bračko, M</au><au>Branchini, P</au><au>Budano, A</au><au>Campajola, M</au><au>Casarosa, G</au><au>Chekelian, V</au><au>Chen, C</au><au>Chen, Y. Q</au><au>Cho, H. -E</au><au>Cunliffe, S</au><au>De Nardo, G</au><au>De Pietro, G</au><au>de Sangro, R</au><au>Dey, S</au><au>Di Canto, A</au><au>Di Capua, F</au><au>Dong, T. V</au><au>Ecker, P</au><au>Eliachevitch, M</au><au>Ferber, T</au><au>Ganiev, E</au><au>Gaz, A</au><au>Gelb, M</au><au>Gemmler, J</au><au>Godang, R</au><au>Goldenzweig, P</au><au>Graziani, E</au><au>Hara, K</au><au>Hershenhorn, A</au><au>Higuchi, T</au><au>Hill, E. C</au><au>Humair, T</au><au>Junkerkalefeld, H</au><au>Kato, Y</au><au>Keck, T</au><au>Kiesling, C</au><au>Kim, C. -H</au><au>Komarov, I</au><au>Kraetzschmar, T. M. G</au><au>Krohn, J. F</au><au>Kumar, J</au><au>Kumara, K</au><au>Kurz, S</au><au>La Licata, C</au><au>Laurenza, M</au><au>Lautenbach, K</au><au>Lieret, K</au><au>Liu, Q. Y</au><au>Longo, S</au><au>Maggiora, M</au><au>Manoni, E</au><au>Marinas, C</au><au>Martini, A</au><au>Meier, F</au><au>Metzner, F</au><au>Milesi, M</au><au>Miyabayashi, K</au><au>Mohanty, G. B</au><au>Mueller, F</au><au>Murphy, C</au><au>Oxford, E. R</au><au>Park, S. -H</au><au>Passeri, A</au><au>Pham, F</au><au>Piilonen, L. E</au><au>Pokharel, S</au><au>Pulvermacher, C</au><au>Rados, P</au><au>Ritter, M</au><au>Santelj, L</au><au>Sato, Y</au><au>Schwartz, A. J</au><au>Sevior, M. E</au><au>Soffer, A</au><au>Stroili, R</au><au>Sutcliffe, W</au><au>Tagnani, D</au><au>Takizawa, M</au><au>Tamponi, U</au><au>Tenchini, F</au><au>Torassa, E</au><au>Urquijo, P</au><au>Vitale, L</au><au>Yusa, Y</au><au>Zani, L</au><au>Zhou, Q. D</au><au>Žlebčík, R</au><au>Zupanc, A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>B$-flavor tagging at Belle II</atitle><date>2021-10-02</date><risdate>2021</risdate><abstract>Eur. Phys. J. C 82, 283 (2022) We report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom ($B$) 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 $B$ decays with flavor-specific final states reconstructed in a data set corresponding to an integrated luminosity of $62.8$ fb$^{-1}$, collected at the $\Upsilon$(4$S$) resonance with the Belle II detector at the SuperKEKB collider. We measure the total effective tagging efficiency to be $\varepsilon_{\rm eff} = \big(30.0 \pm 1.2(\text{stat}) \pm 0.4(\text{syst})\big)\%$ for a category-based algorithm and $\varepsilon_{\rm eff} = \big(28.8 \pm 1.2(\text{stat}) \pm 0.4(\text{syst})\big)\%$ for a deep-learning-based algorithm.</abstract><doi>10.48550/arxiv.2110.00790</doi><oa>free_for_read</oa></addata></record>
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identifier	DOI: 10.48550/arxiv.2110.00790
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recordid	cdi_arxiv_primary_2110_00790
source	arXiv.org
subjects	Physics - High Energy Physics - Experiment
title	B$-flavor tagging at Belle II
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