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arXiv · 1905.11718

Search for $B^0 \to X(3872) \gamma$

Belle Collaboration·P. -C. Chou·P. Chang·I. Adachi·H. Aihara·S. Al Said·D. M. Asner·H. Atmacan·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·I. Badhrees·A. M. Bakich·P. Behera·J. Bennett·M. Berger·B. Bhuyan·T. Bilka·J. Biswal·A. Bobrov·A. Bozek·M. Bračko·T. E. Browder·M. Campajola·L. Cao·D. Červenkov·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·H. E. Cho·K. Cho·S. -K. Choi·Y. Choi·S. Choudhury·D. Cinabro·S. Cunliffe·N. Dash·S. Di Carlo·Z. Doležal·T. V. Dong·S. Eidelman·D. Epifanov·J. E. Fast·T. Ferber·B. G. Fulsom·R. Garg·V. Gaur·N. Gabyshev·A. Garmash·A. Giri·P. Goldenzweig·O. Grzymkowska·J. Haba·O. Hartbrich·K. Hayasaka·H. Hayashii·W. -S. Hou·C. -L. Hsu·T. Iijima·K. Inami·G. Inguglia·A. Ishikawa·R. Itoh·M. Iwasaki·Y. Iwasaki·W. W. Jacobs·S. Jia·Y. Jin·D. Joffe·K. K. Joo·A. B. Kaliyar·Y. Kato·T. Kawasaki·H. Kichimi·C. Kiesling·D. Y. Kim·S. H. Kim·K. Kinoshita·P. Kodyš·S. Korpar·D. Kotchetkov·P. Križan·R. Kroeger·P. Krokovny·R. Kulasiri·R. Kumar·T. Kumita·A. Kuzmin·Y. -J. Kwon·Y. -T. Lai·J. S. Lange·J. K. Lee·J. Y. Lee·S. C. Lee·C. H. Li·Y. B. Li·L. Li Gioi·J. Libby
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Abstract

We report the results of a search for the decay $B^0 \to X(3872)(\to J/\psi \pi^+ \pi^-) \gamma$. The analysis is performed on a data sample corresponding to an integrated luminosity of $711\,{\rm fb}^{-1}$ and containing $772 \times 10^6 B\bar{B}$ pairs, collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider running at the $\Upsilon(4S)$ resonance energy. We find no evidence for a signal and place an upper limit of $\mathcal{B}(B^0 \to X(3872)\gamma)\times \mathcal{B}(X(3872) \to J/\psi \pi^+ \pi^-) < 5.1 \times 10^{-7}$ at 90% confidence level.

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Belle Collaboration, P. -C. Chou, P. Chang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, I. Badhrees, A. M. Bakich, P. Behera, J. Bennett, M. Berger, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, H. E. Cho, K. Cho, S. -K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, N. Dash, S. Di Carlo, Z. Doležal, T. V. Dong, S. Eidelman, D. Epifanov, J. E. Fast, T. Ferber, B. G. Fulsom, R. Garg, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, O. Grzymkowska, J. Haba, O. Hartbrich, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, G. Inguglia, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, S. Jia, Y. Jin, D. Joffe, K. K. Joo, A. B. Kaliyar, Y. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, R. Kulasiri, R. Kumar, T. Kumita, A. Kuzmin, Y. -J. Kwon, Y. -T. Lai, J. S. Lange, J. K. Lee, J. Y. Lee, S. C. Lee, C. H. Li, Y. B. Li, L. Li Gioi, J. Libby. 2019-05-28. Search for $B^0 \to X(3872) \gamma$. https://doi.org/10.1103/physrevd.100.012002

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