Measurement of the photon-energy spectrum in inclusive $B\rightarrow X_{s}\gamma$ decays identified using hadronic decays of the recoil $B$ meson in 2019-2021 Belle II data
Creators: name: Abudinén, F.
name: Adachi, I.
name: Adamczyk, K.
name: Aggarwal, L.
name: Ahlburg, P.
name: Ahmed, H.
name: Ahn, J. K.
name: Aihara, H.
name: Akopov, N.
name: Aloisio, A.
name: Ameli, F.
name: Andricek, L.
name: Anh Ky, N.
name: Asner, D. M.
name: Atmacan, H.
name: Aulchenko, V.
name: Aushev, T.
name: Aushev, V.
name: Aziz, T.
name: Babu, V.
name: Bacher, S.
name: Bae, H.
name: Baehr, S.
name: Bahinipati, S.
name: Bakich, A. M.
name: Bambade, P.
name: Banerjee, Sw.
name: Bansal, S.
name: Barrett, M.
name: Batignani, G.
name: Baudot, J.
name: Bauer, M.
name: Baur, A.
name: Beaubien, A.
name: Beaulieu, A.
name: Becker, J.
name: Behera, P. K.
name: Bennett, J. V.
name: Bernieri, E.
name: Bernlochner, F. U.
name: Bertacchi, V.
name: Bertemes, M.
name: Bertholet, E.
name: Bessner, M.
name: Bettarini, S.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bianchi, F.
name: Bilka, T.
name: Bilokin, S.
name: Biswas, D.
name: Bobrov, A.
name: Bodrov, D.
name: Bolz, A.
name: Bondar, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Branchini, P.
name: Braun, N.
name: Briere, R. A.
name: Browder, T. E.
name: Brown, D. N.
name: Budano, A.
name: Burmistrov, L.
name: Bussino, S.
name: Campajola, M.
name: Cao, L.
name: Casarosa, G.
name: Cecchi, C.
name: Červenkov, D.
name: Chang, M.-C.
name: Chang, P.
name: Cheaib, R.
name: Cheema, P.
name: Chekelian, V.
name: Chen, C.
name: Chen, Y. Q.
name: Chen, Y.-T.
name: Cheon, B. G.
name: Chilikin, K.
name: Chirapatpimol, K.
name: Cho, H.-E.
name: Cho, K.
name: Cho, S.-J.
name: Choi, S.-K.
name: Choudhury, S.
name: Cinabro, D.
name: Corona, L.
name: Cremaldi, L. M.
name: Cunliffe, S.
name: Czank, T.
name: Das, S.
name: Dash, N.
name: Dattola, F.
name: De La Cruz-Burelo, E.
name: De La Motte, S. A.
name: de Marino, G.
name: De Nardo, G.
name: De Nuccio, M.
name: De Pietro, G.
name: de Sangro, R.
name: Deschamps, B.
name: Destefanis, M.
name: Dey, S.
name: De Yta-Hernandez, A.
name: Dhamija, R.
name: Di Canto, A.
name: Di Capua, F.
name: Di Carlo, S.
name: Dingfelder, J.
name: Doležal, Z.
name: Domínguez Jiménez, I.
name: Dong, T. V.
name: Dorigo, M.
name: Dort, K.
name: Dossett, D.
name: Dreyer, S.
name: Dubey, S.
name: Duell, S.
name: Dujany, G.
name: Ecker, P.
name: Eidelman, S.
name: Eliachevitch, M.
name: Epifanov, D.
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name: Fillinger, T.
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name: Fulsom, B. G.
name: Gabriel, M.
name: Gabrielli, A.
name: Gabyshev, N.
name: Ganiev, E.
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name: de la Cruz, I. Heredia
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name: Huang, K.
name: Humair, T.
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name: Inguglia, G.
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name: Jabbar, J. Irakkathil
name: Ishikawa, A.
name: Ito, S.
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name: Jaffe, D. E.
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name: Kim, Y.-K.
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name: Korobov, A.
name: Korpar, S.
name: Kovalchuk, N.
name: Kovalenko, E.
name: Kowalewski, R.
name: Kraetzschmar, T. M. G.
name: Krinner, F.
name: Križan, P.
name: Kroeger, R.
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name: Krokovny, P.
name: Krüger, H.
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name: Kumara, K.
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name: Kunigo, T.
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name: Kurz, S.
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name: Kvasnička, P.
name: Kwon, Y.-J.
name: Lacaprara, S.
name: Lai, Y.-T.
name: La Licata, C.
name: Lalwani, K.
name: Lam, T.
name: Lanceri, L.
name: Lange, J. S.
name: Laurenza, M.
name: Lautenbach, K.
name: Laycock, P. J.
name: Leboucher, R.
name: Le Diberder, F. R.
name: Lee, I.-S.
name: Lee, S. C.
name: Leitl, P.
name: Levit, D.
name: Lewis, P. M.
name: Li, C.
name: Li, L. K.
name: Li, S. X.
name: Li, Y. B.
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name: Lieret, K.
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name: Liptak, Z.
name: Liu, Q. Y.
name: Liu, Z. A.
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name: Wach, B.
name: Waheed, E.
name: Wakeling, H. M.
name: Wan, K.
name: Abdullah, W. Wan
name: Wang, B.
name: Wang, C. H.
name: Wang, E.
name: Wang, M.-Z.
name: Wang, X. L.
name: Warburton, A.
name: Watanabe, M.
name: Watanuki, S.
name: Webb, J.
name: Wehle, S.
name: Welsch, M.
name: Wessel, C.
name: Wiechczynski, J.
name: Wieduwilt, P.
name: Windel, H.
name: Won, E.
name: Wu, L. J.
name: Xu, X. P.
name: Yabsley, B. D.
name: Yamada, S.
name: Yan, W.
name: Yang, S. B.
name: Ye, H.
name: Yelton, J.
name: Yin, J. H.
name: Yonenaga, M.
name: Yook, Y. M.
name: Yoshihara, K.
name: Yoshinobu, T.
name: Yuan, C. Z.
name: Yusa, Y.
name: Zani, L.
name: Zhai, Y.
name: Zhang, J. Z.
name: Zhang, Y.
name: Zhang, Z.
name: Zhilich, V.
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name: Zhukova, V. I.
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name: Žlebčík, R.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2022
Subjects: electron positron: annihilation
electron positron: colliding beams
B: radiative decay
photon: energy spectrum
energy: threshold
B: branching ratio
energy dependence
branching ratio: measured
BELLE
B: hadronic decay
KEK-B
recoil
Upsilon(10570): electroproduction
strangeness
experimental results

description: We measure the photon-energy spectrum in radiative bottom-meson ($B$) decays into inclusive final states involving a strange hadron and a photon. We use SuperKEKB electron-positron collisions corresponding to $189~\mathrm{fb}^{-1}$ of integrated luminosity collected at the $\Upsilon(4S)$ resonance by the Belle II experiment. The partner $B$ candidates are fully reconstructed using a large number of hadronic channels. The $B \rightarrow X_s \gamma$ partial branching fractions are measured as a function of photon energy in the signal $B$ meson rest frame in eight bins above $1.8~\mathrm{GeV}$. The background-subtracted signal yield for this photon energy region is $343 \pm 122$ events. Integrated branching fractions for three photon energy thresholds of $1.8~\mathrm{GeV}$, $2.0~\mathrm{GeV}$, and $2.1~\mathrm{GeV}$ are also reported, and found to be in agreement with world averages.