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arXiv · 2012.05607

Measurement of the Resonant and Non-Resonant Branching Ratios in $\Xi_{c}^{0} \rightarrow \Xi^{0} K^+ K^-$

J. T. McNeil·J. Yelton·J. Bennett·I. Adachi·K. Adamczyk·J. K. Ahn·H. Aihara·S. Al Said·D. M. Asner·H. Atmacan·V. Aulchenko·T. Aushev·R. Ayad·V. Babu·S. Bahinipati·P. Behera·M. Bessner·T. Bilka·J. Biswal·A. Bobrov·G. Bonvicini·A. Bozek·M. Bracko·T. E. Browder·M. Campajola·L. Cao·D. Cervenkov·P. Chang·V. Chekelian·A. Chen·B. G. Cheon·K. Chilikin·K. Cho·S. J. Cho·S. K. Choi·Y. Choi·S. Choudhury·D. Cinabro·S. Cunliffe·S. Das·N. Dash·G. De Nardo·R. Dhamija·F. Di Capua·Z. Dolezal·T. V. Dong·S. Eidelman·T. Ferber·B. G. Fulsom·V. Gaur·N. Gabyshev·A. Garmash·A. Giri·P. Goldenzweig·B. Golob·O. Grzymkowska·Y. Guan·K. Gudkova·C. Hadjivasiliou·K. Hayasaka·H. Hayashii·W. S. Hou·C. L. Hsu·K. Huang·K. Inami·A. Ishikawa·R. Itoh·M. Iwasaki·W. W. Jacobs·H. B. Jeon·S. Jia·Y. Jin·K. K. Joo·A. B. Kaliyar·K. H. Kang·G. Karyan·H. Kichimi·B. H. Kim·C. H. Kim·D. Y. Kim·S. H. Kim·Y. K. Kim·K. Kinoshita·P. Kodys·T. Konno·S. Korpar·P. Krizan·R. Kroeger·P. Krokovny·T. Kuhr·R. Kulasiri·M. Kumar·K. Kumara·Y. J. Kwon·K. Lalwani·S. C. Lee·J. Li·L. K. Li·Y. B. Li·L. Li Gioi
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Abstract

Using the entire data sample of $980$ $fb^{-1}$ integrated luminosity collected with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider, we present an amplitude analysis measuring the branching fractions of the Cabibbo-allowed, $W$-exchange resonant decay $\Xi_{c}^{0} \rightarrow \Xi^{0} \phi (\to K^+ K^-)$ with a polarized $\phi$ and the non-resonant decay via a direct process $\Xi_{c}^{0} \rightarrow \Xi^{0} K^+ K^-$. We present these measurements, relative to the normalization mode $\Xi^{-}\pi^{+}$, and find branching ratios $\frac{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{0} \phi (\rightarrow K^{+}K^{-}))}{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{-} \pi^{+})} = 0.036 \pm 0.004 (stat.) \pm 0.002 (syst.)$ and $\frac{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{0} K^{+} K^{-})}{\mathcal{B}(\Xi_{c}^{0} \rightarrow \Xi^{-} \pi^{+})} = 0.039 \pm 0.004 (stat.) \pm 0.002 (syst.)$ which suggest that only minor cusping peaks occur in the combinatorial background of $\Omega^{*-} \to \Xi^{0}K^{-}$ due to these $\Xi_{c}^{0}$ decays.

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J. T. McNeil, J. Yelton, J. Bennett, I. Adachi, K. Adamczyk, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, P. Behera, M. Bessner, T. Bilka, J. Biswal, A. Bobrov, G. Bonvicini, A. Bozek, M. Bracko, T. E. Browder, M. Campajola, L. Cao, D. Cervenkov, P. Chang, V. Chekelian, A. Chen, B. G. Cheon, K. Chilikin, K. Cho, S. J. Cho, S. K. Choi, Y. Choi, S. Choudhury, D. Cinabro, S. Cunliffe, S. Das, N. Dash, G. De Nardo, R. Dhamija, F. Di Capua, Z. Dolezal, T. V. Dong, S. Eidelman, T. Ferber, B. G. Fulsom, V. Gaur, N. Gabyshev, A. Garmash, A. Giri, P. Goldenzweig, B. Golob, O. Grzymkowska, Y. Guan, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, W. S. Hou, C. L. Hsu, K. Huang, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, W. W. Jacobs, H. B. Jeon, S. Jia, Y. Jin, K. K. Joo, A. B. Kaliyar, K. H. Kang, G. Karyan, H. Kichimi, B. H. Kim, C. H. Kim, D. Y. Kim, S. H. Kim, Y. K. Kim, K. Kinoshita, P. Kodys, T. Konno, S. Korpar, P. Krizan, R. Kroeger, P. Krokovny, T. Kuhr, R. Kulasiri, M. Kumar, K. Kumara, Y. J. Kwon, K. Lalwani, S. C. Lee, J. Li, L. K. Li, Y. B. Li, L. Li Gioi. 2020-12-10. Measurement of the Resonant and Non-Resonant Branching Ratios in $\Xi_{c}^{0} \rightarrow \Xi^{0} K^+ K^-$. https://doi.org/10.1103/physrevd.103.112002

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