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arxiv: 2208.13189 · v2 · pith:ZPMOBHOWnew · submitted 2022-08-28 · ✦ hep-ex · hep-ph

Observation of e^+e^-toωchi_(bJ)(1P) and search for X_b to ωUpsilon(1S) at sqrt{s} near 10.75 GeV

Belle II collaboration: I. Adachi , L. Aggarwal , H. Ahmed , H. Aihara , N. Akopov , A. Aloisio , N. Anh Ky , T. Aushev
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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 A. Bondar J. Borah A. Bozek M. Bracko P. Branchini T. E. Browder A. Budano S. Bussino M. Campajola L. Cao G. Casarosa C. Cecchi 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. Dolezal I. Dominguez Jimenez T. V. Dong M. Dorigo K. Dort S. Dreyer S. Dubey G. Dujany M. Eliachevitch D. Epifanov P. Feichtinger T. Ferber D. Ferlewicz T. Fillinger G. Finocchiaro A. Fodor F. Forti B. G. Fulsom E. Ganiev A. Garmash 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 Z. Gruberova T. Gu Y. Guan K. Gudkova J. Guilliams T. Hara K. Hayasaka H. Hayashii S. Hazra C. Hearty I. Heredia de la Cruz M. Hernandez 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 R. Itoh 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. Kodys T. Koga S. Kohani K. Kojima T. Konno A. Korobov S. Korpar E. Kovalenko R. Kowalewski T. M. G. Kraetzschmar P. Krizan 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. Staric S. Stefkova Z. S. Stottler R. Stroili Y. Sue M. Sumihama K. Sumisawa W. Sutcliffe S. Y. Suzuki H. Svidras M. Takizawa U. Tamponi 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 V. Zhilich Q. D. Zhou X. Y. Zhou V. I. Zhukova R. Zlebcik
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classification ✦ hep-ex hep-ph
keywords omegaupsilonsqrtdatabelleobservationsearchstate
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We study the processes $e^+e^-\to\omega\chi_{bJ}(1P)$ ($J$ = 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 $\Upsilon(4S)$ resonance. We report the first observation of $\omega\chi_{bJ}(1P)$ 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 $e^+e^-\to \omega\chi_{b1,b2}(1P)$ to be consistent with the shape of the $\Upsilon(10753)$ state. These data indicate that the internal structures of the $\Upsilon(10753)$ and $\Upsilon(10860)$ 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 $\omega\Upsilon(1S)$. No significant signal is observed for masses between 10.45 and 10.65 GeV/$c^2$.

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