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

Journal Article · 12 May 2020 · Physical Review D

DOI: https://doi.org/10.1103/physrevd.101.091101 · OSTI ID:1618172

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

We report the measurement of e⁺e^- → D$$+\atop{s}$$ D$${*}\atop{s2}$$(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 Υ(4S) and nearby. We find evidence for an enhancement with a 3.4σ significance in the invariant mass of D$$+\atop{s}$$ D$${*}\atop{s2}$$(2573)^- +c.c. The measured mass and width are (4619.8 $${+8.9}\atop{-8.0}$$ (stat.)±2.3(syst.)) MeV/c² and (47.0 $${+31.3}\atop{-14.8}$$ (stat.) ± 4.6(syst.)) MeV, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmonium-like state at 4626 MeV/c² recently reported by Belle in e⁺e^- → D$$+\atop{s}$$ D_s1(2536)^- +c.c. The product of the e⁺e^- D→ $$+\atop{s}$$ D$${*}\atop{s2}$$(2573)^- +c.c. cross section and the branching fraction of D$${*}\atop{s2}$$(2573)^- → $$\overline{D}$$⁰K^- is measured from D$$+\atop{s}$$ $${*}\atop{s2}$$(2573)^- threshold to 5.6 GeV.

• Research Organization: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Univ. of Hawaii, Honolulu, HI (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); KEK - High Energy Accelerator Research Organization; Ministry of Education, Culture, Sports, Science and Technology
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: SC0009973; SC0012704; SC0010504
• OSTI ID: 1618172
• Alternate ID(s): OSTI ID: 1631949; OSTI ID: 1756654; OSTI ID: 1779737
• Report Number(s): BNL-215978-2020-JAAM; TRN: US2205662
• Journal Information: Physical Review D, Vol. 101, Issue 9; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English