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arXiv · 1904.07015

Search for $X(3872)$ and $X(3915)$ decay into $χ_{c1} π^0$ in $B$ decays at Belle

V. Bhardwaj·S. Jia·I. Adachi·H. Aihara·D. M. Asner·T. Aushev·R. Ayad·V. Babu·I. Badhrees·S. Bahinipati·V. Bansal·P. Behera·C. Beleño·M. Berger·B. Bhuyan·T. Bilka·J. Biswal·A. Bobrov·A. Bondar·G. Bonvicini·A. Bozek·M. Bračko·T. E. Browder·M. Campajola·L. Cao·D. Červenkov·P. Chang·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·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·D. Greenwald·O. Grzymkowska·J. Haba·T. Hara·K. Hayasaka·H. Hayashii·W. -S. Hou·C. -L. Hsu·T. Iijima·K. Inami·A. Ishikawa·R. Itoh·M. Iwasaki·Y. Iwasaki·W. W. Jacobs·Y. Jin·D. Joffe·K. K. Joo·T. Julius·A. B. Kaliyar·G. Karyan·Y. Kato·T. Kawasaki·C. Kiesling·C. H. Kim·D. Y. Kim·S. H. Kim·K. Kinoshita·P. Kodyš·S. Korpar·D. Kotchetkov·P. Križan·R. Kroeger·P. Krokovny·T. Kuhr·R. Kulasiri·R. Kumar·Y. -J. Kwon·K. Lalwani·J. S. Lange·I. S. Lee·J. K. Lee·J. Y. Lee·S. C. Lee·L. K. Li·Y. B. Li·L. Li Gioi·J. Libby
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Abstract

We report a search for $X(3872)$ and $X(3915)$ in $B^+ \to χ_{c1} π^0 K^+$ decays. We set an upper limit of $\mathcal{B}(B^+ \to X(3872) K^+) \times \mathcal{B}(X(3872) \to χ_{c1} π^0)$ $ < 8.1 \times 10^{-6}$ and $\mathcal{B}(B^+ \to X(3915) K^+) \times \mathcal{B}(X(3915) \to χ_{c1} π^0)$ $ < 3.8 \times 10^{-5}$ at 90\% confidence level. We also measure $\mathcal{B}(X(3872) \to χ_{c1} π^0)/\mathcal{B}(X(3872) \to J/ψπ^+ π^-) < 0.97$ at 90\% confidence level. The results reported here are obtained from $772 \times 10^{6}$ $B\overline{B}$ events collected at the $Υ(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.

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V. Bhardwaj, S. Jia, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, I. Badhrees, S. Bahinipati, V. Bansal, P. Behera, C. Beleño, M. Berger, B. Bhuyan, T. Bilka, J. Biswal, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bračko, T. E. Browder, M. Campajola, L. Cao, D. Červenkov, P. Chang, 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, 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, D. Greenwald, O. Grzymkowska, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, W. -S. Hou, C. -L. Hsu, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, W. W. Jacobs, Y. Jin, D. Joffe, K. K. Joo, T. Julius, A. B. Kaliyar, G. Karyan, Y. Kato, T. Kawasaki, C. Kiesling, C. H. Kim, D. Y. Kim, S. H. Kim, K. Kinoshita, P. Kodyš, S. Korpar, D. Kotchetkov, P. Križan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, R. Kumar, Y. -J. Kwon, K. Lalwani, J. S. Lange, I. S. Lee, J. K. Lee, J. Y. Lee, S. C. Lee, L. K. Li, Y. B. Li, L. Li Gioi, J. Libby. 2019-05-16. Search for $X(3872)$ and $X(3915)$ decay into $χ_{c1} π^0$ in $B$ decays at Belle. https://doi.org/10.1103/physrevd.99.111101

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