Observation of e^{+}e^{-}→ωχ_{bJ}(1P) and Search for X_{b}→ωϒ(1S) at sqrt[s] near 10.75 GeV. I Adachi , L Aggarwal , H Ahmed , H Aihara , N Akopov , A Aloisio , N Anh Ky , D M Asner , T Aushev , V Aushev , H Bae , P Bambade , Sw Banerjee , J Baudot , M Bauer , A Beaubien , J Becker , P K Behera , J V Bennett , E Bernieri , F U Bernlochner , V Bertacchi , M Bertemes , E Bertholet , M Bessner , S Bettarini , B Bhuyan , F Bianchi , T Bilka , D Biswas , D Bodrov , A Bolz , J Borah , A Bozek , M Bračko , P Branchini , T E Browder , A Budano , S Bussino , M Campajola , L Cao , G Casarosa , M-C Chang , P Cheema , V Chekelian , Y Q Chen , K Chilikin , K Chirapatpimol , H-E Cho , K Cho , S-J Cho , S-K Choi , S Choudhury , D Cinabro , L Corona , S Cunliffe , S Das , F Dattola , E De La Cruz-Burelo , S A De La Motte , G De Nardo , M De Nuccio , G De Pietro , R de Sangro , M Destefanis , S Dey , A De Yta-Hernandez , R Dhamija , A Di Canto , F Di Capua , Z Doležal , I Domínguez Jiménez , T V Dong , M Dorigo , K Dort , S Dreyer , S Dubey , G Dujany , M Eliachevitch , P Feichtinger , T Ferber , D Ferlewicz , T Fillinger , G Finocchiaro , A Fodor , F Forti , B G Fulsom , E Ganiev , V Gaur , A Gaz , A Gellrich , G Ghevondyan , R Giordano , A Giri , A Glazov , B Gobbo , R Godang , P Goldenzweig , S Granderath , E Graziani , D Greenwald , T Gu , Y Guan , K Gudkova , J Guilliams , T Hara , K Hayasaka , H Hayashii , S Hazra , C Hearty , I Heredia de la Cruz , M Hernández Villanueva , A Hershenhorn , T Higuchi , E C Hill , H Hirata , M Hohmann , C-L Hsu , T Iijima , K Inami , G Inguglia , N Ipsita , A Ishikawa , S Ito , M Iwasaki , P Jackson , W W Jacobs , D E Jaffe , E-J Jang , Q P Ji , S Jia , Y Jin , K K Joo , H Junkerkalefeld , A B Kaliyar , K H Kang , R Karl , G Karyan , C Ketter , C Kiesling , C-H Kim , D Y Kim , K-H Kim , Y-K Kim , H Kindo , P Kodyš , T Koga , S Kohani , K Kojima , T Konno , A Korobov , S Korpar , E Kovalenko , R Kowalewski , T M G Kraetzschmar , P Križan , P Krokovny , R Kumar , K Kumara , T Kunigo , A Kuzmin , Y-J Kwon , S Lacaprara , T Lam , L Lanceri , J S Lange , M Laurenza , K Lautenbach , R Leboucher , P M Lewis , C Li , L K Li , J Libby , K Lieret , Z Liptak , Q Y Liu , D Liventsev , S Longo , A Lozar , T Lueck , C Lyu , M Maggiora , R Maiti , R Manfredi , E Manoni , S Marcello , C Marinas , L Martel , A Martini , T Martinov , L Massaccesi , M Masuda , K Matsuoka , S K Maurya , J A McKenna , M Merola , F Metzner , M Milesi , C Miller , K Miyabayashi , R Mizuk , N Molina-Gonzalez , S Moneta , H-G Moser , M Mrvar , R Mussa , I Nakamura , M Nakao , Y Nakazawa , A Narimani Charan , M Naruki , Z Natkaniec , A Natochii , L Nayak , M Nayak , G Nazaryan , N K Nisar , S Ogawa , H Ono , Y Onuki , P Oskin , A Paladino , A Panta , E Paoloni , S Pardi , H Park , S-H Park , B Paschen , A Passeri , S Paul , T K Pedlar , I Peruzzi , R Peschke , R Pestotnik , M Piccolo , L E Piilonen , P L M Podesta-Lerma , T Podobnik , S Pokharel , L Polat , C Praz , S Prell , E Prencipe , M T Prim , H Purwar , N Rad , S Raiz , A Ramirez Morales , M Reif , S Reiter , M Remnev , I Ripp-Baudot , G Rizzo , S H Robertson , J M Roney , A Rostomyan , N Rout , G Russo , D A Sanders , S Sandilya , A Sangal , L Santelj , Y Sato , V Savinov , B Scavino , J Schueler , C Schwanda , Y Seino , A Selce , K Senyo , J Serrano , M E Sevior , C Sfienti , C P Shen , X D Shi , T Shillington , A Sibidanov , J B Singh , J Skorupa , R J Sobie , A Soffer , E Solovieva , S Spataro , M Starič , S Stefkova , Z S Stottler , R Stroili , Y Sue , M Sumihama , K Sumisawa , W Sutcliffe , S Y Suzuki , H Svidras , M Takizawa , K Tanida , H Tanigawa , F Tenchini , A Thaller , R Tiwary , D Tonelli , E Torassa , N Toutounji , K Trabelsi , M Uchida , I Ueda , Y Uematsu , T Uglov , K Unger , Y Unno , K Uno , S Uno , Y Ushiroda , S E Vahsen , R van Tonder , G S Varner , A Vinokurova , L Vitale , V Vobbilisetti , H M Wakeling , E Wang , M-Z Wang , A Warburton , S Watanuki , M Welsch , C Wessel , E Won , X P Xu , B D Yabsley , S Yamada , W Yan , S B Yang , H Ye , J Yelton , J H Yin , Y M Yook , K Yoshihara , C Z Yuan , L Zani , Y Zhang , X Y Zhou , V I Zhukova , R Žlebčík Physical review letters（2023）
摘要
We study the processes e^{+}e^{-}→ωχ_{bJ}(1P) (J=0, 1, or 2) using samples at center-of-mass energies sqrt[s]=10.701, 10.745, and 10.805 GeV, corresponding to 1.6, 9.8, and 4.7 fb^{-1} of integrated luminosity, respectively. These data were collected with the Belle II detector during special operations of the SuperKEKB collider above the ϒ(4S) resonance. We report the first observation of ωχ_{bJ}(1P) signals at sqrt[s]=10.745 GeV. By combining Belle II data with Belle results at sqrt[s]=10.867 GeV, we find energy dependencies of the Born cross sections for e^{+}e^{-}→ωχ_{b1,b2}(1P) to be consistent with the shape of the ϒ(10753) state. These data indicate that the internal structures of the ϒ(10753) and ϒ(10860) states may differ. Including data at sqrt[s]=10.653 GeV, we also search for the bottomonium equivalent of the X(3872) state decaying into ωϒ(1S). No significant signal is observed for masses between 10.45 and 10.65 GeV/c^{2}.
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