B-flavor tagging at Belle II
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Published:2022-04
Issue:4
Volume:82
Page:
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ISSN:1434-6052
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Container-title:The European Physical Journal C
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language:en
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Short-container-title:Eur. Phys. J. C
Author:
Abudinén F.ORCID, 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., Casarosa G., Cecchi C., Cheaib R., Chekelian V., Chen C., Chen Y. Q., Cho H. -E., Cunliffe S., De Nardo G., De Pietro G., de Sangro R., Dey S., Canto A. Di, Capua F. Di, Dong T. V., Dujany G., Ecker P., Eliachevitch M., Ferber T., Forti F., Ganiev E., Gaz A., Gelb M., Gemmler J., Godang R., Goldenzweig P., Graziani E., Hara K., Hershenhorn A., Higuchi T., Hill E. C., Hohmann M., Humair T., Inguglia G., Junkerkalefeld H., Karl R., Kato Y., Keck T., Kiesling C., Kim C. -H., Kohani S., Komarov I., Kraetzschmar T. M. G., Križan P., Krohn J. F., Kuhr T., Kumar J., Kumara K., Kurz S., Lacaprara S., La Licata C., Laurenza M., Lautenbach K., Lee S. C., Lieret K., Gioi L. Li, Liu Q. Y., Longo S., Maggiora M., Manoni E., Marinas C., Martini A., Meier F., Merola M., 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., Prim M. T., Pulvermacher C., Rados P., Ritter M., Rostomyan A., Sandilya S., Santelj L., Sato Y., Schwartz A. J., Sevior M. E., Soffer A., Spataro S., 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.
Abstract
AbstractWe report on new flavor tagging algorithms developed to determine the quark-flavor content of bottom (
"Image missing") 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
"Image missing" decays with flavor-specific final states reconstructed in a data set corresponding to an integrated luminosity of 62.8 fb$$^{-1}$$
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1
, collected at the "Equation missing" resonance with the Belle II detector at the SuperKEKB collider. We measure the total effective tagging efficiency to be $$\begin{aligned} \varepsilon _\mathrm{eff} = \big (30.0 \pm 1.2(\text {stat}) \pm 0.4(\text {syst})\big )\% \end{aligned}$$
ε
eff
=
(
30.0
±
1.2
(
stat
)
±
0.4
(
syst
)
)
%
for a category-based algorithm and $$\begin{aligned} \varepsilon _\mathrm{eff} = \big (28.8 \pm 1.2(\text {stat}) \pm 0.4(\text {syst})\big )\% \end{aligned}$$
ε
eff
=
(
28.8
±
1.2
(
stat
)
±
0.4
(
syst
)
)
%
for a deep-learning-based algorithm.
Publisher
Springer Science and Business Media LLC
Subject
Physics and Astronomy (miscellaneous),Engineering (miscellaneous)
Reference60 articles.
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