首页|Observation of the decays $B^{+} \to Î£_{c}(2455)^{++} \overlineÎ_{c}^{-}$ and $B^{0} \to Î£_{c}(2455)^{0} \overlineÎ_{c}^{0}$

Observation of the decays $B^{+} \to Î£_{c}(2455)^{++} \overlineÎ_{c}^{-}$ and $B^{0} \to Î£_{c}(2455)^{0} \overlineÎ_{c}^{0}$

来源：

Arxiv

英文摘要

We report the first observation of the two-body baryonic decays $B^{+} \to Î£_{c}(2455)^{++} \overlineÎ_{c}^{-}$ and $B^{0} \to Î£_{c}(2455)^{0} \overlineÎ_{c}^{0}$ with significances of $7.3\,Ï$ and $6.2\,Ï$, respectively, including statistical and systematic uncertainties. The branching fractions are measured to be $\mathcal{B}(B^{+} \to Î£_{c}(2455)^{++} \overlineÎ_{c}^{-}) = (5.74 \pm 1.11 \pm 0.42_{-1.53}^{+2.47}) \times 10^{-4}$ and $\mathcal{B}(B^{0} \to Î£_{c}(2455)^{0} \overlineÎ_{c}^{0}) = (4.83 \pm 1.12 \pm 0.37_{-0.60}^{+0.72}) \times 10^{-4}$. The first and second uncertainties are statistical and systematic, respectively, while the third ones arise from the absolute branching fractions of $\overlineÎ_{c}^{-}$ or $\overlineÎ_{c}^{0}$ decays. The data samples used for this analysis have integrated luminosities of 711~$\mathrm{fb}^{-1}$ and 365~$\mathrm{fb}^{-1}$, and were collected at the $Î¥(4S)$ resonance by the Belle and Belle~II detectors operating at the KEKB and SuperKEKB asymmetric-energy $e^{+}e^{-}$ colliders, respectively.

作者：S. Patra、S. Paul、T. K. Pedlar、R. Pestotnik、L. E. Piilonen、P. L. M. Podesta-Lerma、T. Podobnik、C. Praz、S. Prell、E. Prencipe、M. T. Prim、S. Privalov、H. Purwar、P. Rados、G. Raeuber、S. Raiz、V. Raj、K. Ravindran、J. U. Rehman、M. Reif、S. Reiter、D. Ricalde Herrmann、I. Ripp-Baudot、G. Rizzo、S. H. Robertson、J. M. Roney、A. Rostomyan、N. Rout、D. A. Sanders、S. Sandilya、L. Santelj、C. Santos、V. Savinov、B. Scavino、G. Schnell、M. Schnepf、K. Schoenning、C. Schwanda、Y. Seino、A. Selce、K. Senyo、J. Serrano、C. Sfienti、W. Shan、G. Sharma、C. P. Shen、X. D. Shi、T. Shillington、T. Shimasaki、J. -G. Shiu、D. Shtol、B. Shwartz、A. Sibidanov、F. Simon、J. B. Singh、J. Skorupa、R. J. Sobie、M. Sobotzik、A. Soffer、A. Sokolov、E. Solovieva、S. Spataro、B. Spruck、M. Starič、P. Stavroulakis、L. Stoetzer、R. Stroili、M. Sumihama、N. Suwonjandee、H. Svidras、M. Takizawa、S. Tanaka、S. S. Tang、K. Tanida、F. Tenchini、F. Testa、A. Thaller、O. Tittel、R. Tiwary、E. Torassa、K. Trabelsi、F. F. Trantou、I. Tsaklidis、M. Uchida、I. Ueda、K. Unger、Y. Unno、K. Uno、S. Uno、Belle、Belle II Collaborations、:、M. Abumusabh、I. Adachi、L. Aggarwal、H. Ahmed、Y. Ahn、H. Aihara、N. Akopov、S. Alghamdi、M. Alhakami、A. Aloisio、N. Althubiti、K. Amos、N. Anh Ky、D. M. Asner、H. Atmacan、T. Aushev、V. Aushev、R. Ayad、V. Babu、H. Bae、N. K. Baghel、S. Bahinipati、P. Bambade、Sw. Banerjee、M. Barrett、M. Bartl、J. Baudot、A. Baur、A. Beaubien、F. Becherer、J. Becker、J. V. Bennett、F. U. Bernlochner、V. Bertacchi、M. Bertemes、E. Bertholet、M. Bessner、S. Bettarini、V. Bhardwaj、B. Bhuyan、F. Bianchi、D. Biswas、A. Bobrov、D. Bodrov、A. Bondar、G. Bonvicini、J. Borah、A. Boschetti、A. Bozek、M. Bračko、P. Branchini、R. A. Briere、T. E. Browder、A. Budano、S. Bussino、Q. Campagna、M. Campajola、L. Cao、G. Casarosa、C. Cecchi、M. -C. Chang、P. Cheema、L. Chen、B. G. Cheon、K. Chilikin、J. Chin、K. Chirapatpimol、H. -E. Cho、K. Cho、S. -J. Cho、S. -K. Choi、S. Choudhury、L. Corona、J. X. Cui、E. De La Cruz-Burelo、R. Godang、P. Goldenzweig、W. Gradl、E. Graziani、D. Greenwald、K. Gudkova、I. Haide、Y. Han、C. Harris、H. Hayashii、S. Hazra、C. Hearty、M. T. Hedges、G. Heine、I. Heredia de la Cruz、T. Higuchi、M. Hoek、M. Hohmann、R. Hoppe、P. Horak、X. T. Hou、C. -L. Hsu、T. Humair、T. Iijima、K. Inami、N. Ipsita、A. Ishikawa、R. Itoh、M. Iwasaki、P. Jackson、W. W. Jacobs、E. -J. Jang、Q. P. Ji、Y. Jin、A. Johnson、J. Kandra、K. H. Kang、F. Keil、C. Kiesling、C. -H. Kim、D. Y. Kim、J. -Y. Kim、K. -H. Kim、Y. -K. Kim、H. Kindo、K. Kinoshita、P. Kodyš、T. Koga、S. Kohani、K. Kojima、A. Korobov、S. Korpar、E. Kovalenko、R. Kowalewski、P. Križan、P. Krokovny、T. Kuhr、Y. Kulii、R. Kumar、K. Kumara、T. Kunigo、A. Kuzmin、Y. -J. Kwon、K. Lalwani、T. Lam、J. S. Lange、T. S. Lau、M. Laurenza、R. Leboucher、F. R. Le Diberder、M. J. Lee、C. Lemettais、P. Leo、P. M. Lewis、C. Li、H. -J. Li、L. K. Li、Q. M. Li、W. Z. Li、Y. Li、Y. B. Li、Y. P. Liao、J. Libby、J. Lin、V. Lisovskyi、M. H. Liu、Q. Y. Liu、Z. Liu、D. Liventsev、S. Longo、A. Lozar、T. Lueck、C. Lyu、Y. Ma、M. Maggiora、S. P. Maharana、R. Maiti、G. Mancinelli、R. Manfredi、E. Manoni、M. Mantovano、D. Marcantonio、S. Marcello、C. Marinas、C. Martellini、A. Martens、T. Martinov、L. Massaccesi、M. Masuda、T. Matsuda、D. Matvienko、S. K. Maurya、M. Maushart、J. A. McKenna、Z. Mediankin Gruberová、R. Mehta、F. Meier、D. Meleshko、M. Merola、C. Miller、M. Mirra、K. Miyabayashi、H. Miyake、S. Mondal、S. Moneta、A. L. Moreira de Carvalho、H. -G. Moser、R. Mussa、I. Nakamura、M. Nakao、H. Nakazawa、Y. Nakazawa、M. Naruki、Z. Natkaniec、A. Natochii、M. Nayak、M. Neu、S. Nishida、S. Ogawa、R. Okubo、H. Ono、Y. Onuki、G. Pakhlova、S. Pardi、J. Park、S. -H. Park、B. Paschen、R. Volpe、M. Wakai、S. Wallner、M. -Z. Wang、A. Warburton、C. Wessel、E. Won、B. D. Yabsley、S. Yamada、W. Yan、S. B. Yang、J. Yelton、J. H. Yin、K. Yoshihara、C. Z. Yuan、J. Yuan、Y. Yusa、L. Zani、F. Zeng、B. Zhang、J. S. Zhou、Q. D. Zhou、L. Zhu、R. Žlebčík、S. A. De La Motte、G. De Nardo、G. De Pietro、R. de Sangro、M. Destefanis、S. Dey、A. Di Canto、J. Dingfelder、Z. Doležal、I. Domínguez Jiménez、T. V. Dong、X. Dong、M. Dorigo、K. Dugic、G. Dujany、P. Ecker、D. Epifanov、J. Eppelt、R. Farkas、P. Feichtinger、T. Ferber、T. Fillinger、C. Finck、G. Finocchiaro、F. Forti、A. Frey、B. G. Fulsom、A. Gabrielli、A. Gale、E. Ganiev、M. Garcia-Hernandez、R. Garg、G. Gaudino、V. Gaur、V. Gautam、A. Gellrich、D. Ghosh、H. Ghumaryan、G. Giakoustidis、R. Giordano、A. Giri、P. Gironella Gironell、B. Gobbo、P. Urquijo、Y. Ushiroda、S. E. Vahsen、R. van Tonder、K. E. Varvell、M. Veronesi、V. S. Vismaya、L. Vitale

作者单位：

学科分类：物理学

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Observation of the decays $B^{+} \to Î£_{c}(2455)^{++} \overlineÎ_{c}^{-}$ and $B^{0} \to Î£_{c}(2455)^{0} \overlineÎ_{c}^{0}$