Evidence for a vector charmonium-like state in $e^+e^- \to D^+_sD^*_{s2}(2573)^-+c.c.$

A. Bozek; A. Chen; A. Garmash; A. Giri; A. Ishikawa; A. Kuzmin; A. Rostomyan; A. Vinokurova; Belle Collaboration: S. Jia; B. G. Cheon

arxiv: 2004.02404 · v1 · pith:BRBHPHTUnew · submitted 2020-04-06 · ✦ hep-ex · hep-ph

Evidence for a vector charmonium-like state in e^+e^- to D^+_sD^*_(s2)(2573)^-+c.c.

Belle Collaboration: S. Jia , C. P. Shen , I. Adachi , H. Aihara , S. Al Said , D. M. Asner , H. Atmacan , V. Aulchenko

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R. Ayad I. Badhrees P. Behera K. Belous J. Bennett D. Besson V. Bhardwaj T. Bilka J. Biswal G. Bonvicini A. Bozek M. Bra\v{c}ko T. E. Browder M. Campajola D. \v{C}ervenkov P. Chang A. Chen B. G. Cheon K. Chilikin K. Cho S.-K. Choi Y. Choi S. Choudhury D. Cinabro N. Dash G. De Nardo F. Di Capua Z. Dole\v{z}al T. V. Dong S. Eidelman D. Epifanov J. E. Fast T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur N. Gabyshev A. Garmash A. Giri P. Goldenzweig B. Golob O. Grzymkowska O. Hartbrich K. Hayasaka H. Hayashii W.-S. Hou C.-L. Hsu K. Inami G. Inguglia A. Ishikawa R. Itoh M. Iwasaki Y. Iwasaki H. B. Jeon Y. Jin K. K. Joo G. Karyan T. Kawasaki C. Kiesling B. H. Kim D. Y. Kim K.-H. Kim S. H. Kim Y.-K. Kim K. Kinoshita P. Kody\v{s} S. Korpar D. Kotchetkov P. Kri\v{z}an R. Kroeger P. Krokovny R. Kulasiri A. Kuzmin Y.-J. Kwon K. Lalwani J. S. Lange S. C. Lee L. K. Li Y. B. Li L. Li Gioi J. Libby K. Lieret D. Liventsev J. MacNaughton C. MacQueen M. Masuda T. Matsuda D. Matvienko M. Merola R. Mizuk T. J. Moon T. Mori M. Mrvar M. Nakao M. Nayak N. K. Nisar S. Nishida S. Ogawa H. Ono P. Oskin P. Pakhlov G. Pakhlova S. Pardi S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik V. Popov E. Prencipe M. T. Prim A. Rostomyan N. Rout G. Russo Y. Sakai S. Sandilya L. Santelj T. Sanuki V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior M. Shapkin V. Shebalin J.-G. Shiu B. Shwartz E. Solovieva S. Stani\v{c} M. Stari\v{c} Z. S. Stottler J. F. Strube M. Sumihama T. Sumiyoshi W. Sutcliffe M. Takizawa K. Tanida F. Tenchini M. Uchida T. Uglov Y. Unno S. Uno Y. Usov R. Van Tonder G. Varner A. Vinokurova C. H. Wang E. Wang M.-Z. Wang P. Wang X. L. Wang M. Watanabe E. Won X. Xu W. Yan S. B. Yang H. Ye C. Z. Yuan Y. Yusa Z. P. Zhang V. Zhilich V. Zhukova V. Zhulanov

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keywords massbellecharmonium-likeenhancementevidencemeasuredstatstate

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We report the measurement of $e^+e^- \to D^+_sD^*_{s2}(2573)^-+c.c.$ via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb$^{-1}$ collected with the Belle detector at the $\Upsilon(4S)$ and nearby. We find evidence for an enhancement with a 3.4$\sigma$ significance in the invariant mass of $D^+_sD^*_{s2}(2573)^- +c.c.$ The measured mass and width are $(4619.8^{+8.9}_{-8.0}({\rm stat.})\pm2.3({\rm syst.}))~{\rm MeV}/c^{2}$ and $(47.0^{+31.3}_{-14.8}({\rm stat.})\pm4.6({\rm syst.}))~{\rm MeV}$, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmonium-like state at 4626 MeV/$c^2$ recently reported by Belle in $e^+e^-\to D^+_sD_{s1}(2536)^-+c.c.$ The product of the $e^+e^-\to D^+_sD^*_{s2}(2573)^-+c.c.$ cross section and the branching fraction of $D^*_{s2}(2573)^-\to{\bar D}^0K^-$ is measured from $D^+_sD^*_{s2}(2573)^-$ threshold to 5.6 GeV.

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