Abstract
For the first time we search for the $\eta_{c2}(1D)$ in $e^+e^-\to\gamma\eta_{c2}(1D)$ at $\sqrt{s}$ = 10.52, 10.58, and 10.867 GeV with data samples of 89.5 fb$^{-1}$, 711 fb$^{-1}$, and 121.4 fb$^{-1}$, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. No significant $\eta_{c2}(1D)$ signal is observed in the mass range between 3.8 and 3.88 GeV/$c^2$. The upper limit at 90\% confidence level on the product of the Born cross section for $e^+e^- \to \gamma\eta_{c2}(1D)$ and branching fraction for $\eta_{c2}(1D)\to \gamma h_c(1P)$ is determined to be $\sigma(e^+e^- \to \gamma\eta_{c2}(1D)){\cal B}(\eta_{c2}(1D)\to \gamma h_c(1P))$ $<$ 4.9 fb at $\sqrt{s}$ near 10.6 GeV.
Highlights
With data samples of 89.5 fb−1, 711 fb−1, and 121.4 fb−1, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider
A D-wave charmonium state ψ2ð1DÞ decaying into γχc1 was observed in B decays and eþe− annihilations by Belle [1] and BESIII [2], respectively
Lattice calculations [11,12] find that the ηc2ð1DÞ and ψ2ð1DÞ masses are close to each other
Summary
S. Jia,11 C. P. Shen ,11 I. Adachi,18,14 H. Aihara,86 S. Al Said,80,37 D. M. Asner,3 T. Aushev,20 R. Ayad,80 V. Babu,8 P. Behera,26 K. Belous,30 J. Bennett,53 M. Bessner,17 V. Bhardwaj,23 B. Bhuyan,24 T. Bilka,5 J. Biswal,35 A. Bobrov,4,65 G. Bonvicini,88 A. Bozek,62 M. Bračko,50,35 P. Branchini,32 T. E. Browder,17 A. Budano,32 M. Campajola,31,57 D. Červenkov,5 M.-C. Chang,10 P. Chang,61 V. Chekelian,51 A. Chen,59 B. G. Cheon,16 K. Chilikin,44 H. E. Cho,16 K. Cho,39 S.-J. Cho,90 S.-K. Choi,15 Y. Choi,78 S. Choudhury,25 D. Cinabro,88 S. Cunliffe,8 S. Das,49 N. Dash,26 G. De Nardo,31,57 G. De Pietro,32 R. Dhamija,25 F. Di Capua,31,57 Z. Doležal,5 T. V. Dong,11 D. Epifanov,4,65 T. Ferber,8 B. G. Fulsom,67 R. Garg,68 V. Gaur,87 N. Gabyshev,4,65 A. Garmash,4,65 A. Giri,25 P. Goldenzweig,36 E. Graziani,32 T. Gu,70 K. Gudkova,4,65 C. Hadjivasiliou,67 S. Halder,81 T. Hara,18,14 O. Hartbrich,17 K. Hayasaka,64 H. Hayashii,58 W.-S. Hou,61 C.-L. Hsu,79 K. Inami,56 A. Ishikawa,18,14 R. Itoh,18,14 M. Iwasaki,66 Y. Iwasaki,18 W. W. Jacobs,27 Y. Jin,86 K. K. Joo,6 A. B. Kaliyar,81 K. H. Kang,42 G. Karyan,8 Y. Kato,56 T. Kawasaki,38 C. Kiesling,51 D. Y. Kim,77 K.-H. Kim,90 S. H. Kim,74 Y.-K. Kim,90 K. Kinoshita,7 P. Kodyš,5 T. Konno,38 A. Korobov,4,65 S. Korpar,50,35 E. Kovalenko,4,65 P. Križan,46,35 R. Kroeger,53 P. Krokovny,4,65 T. Kuhr,47 M. Kumar,49 K. Kumara,88 A. Kuzmin,4,65 Y.-J. Kwon,90 K. Lalwani,49 J. S. Lange,12 M. Laurenza,32,91 S. C. Lee,42 C. H. Li,45 J. Li,42 L. K. Li,7 Y. B. Li,69 L. Li Gioi,51 J. Libby,26 K. Lieret,47 D. Liventsev,88,18 M. Masuda,85,71 T. Matsuda,54 D. Matvienko,4,65,44 M. Merola,31,57 F. Metzner,36 K. Miyabayashi,58 H. Miyata,64 R. Mizuk,44,20 R. Mussa,33 M. Nakao,18,14 Z. Natkaniec,62 A. Natochii,17 L. Nayak,25 M. Niiyama,41 N. K. Nisar,3 S. Nishida,18,14 K. Nishimura,17 S. Ogawa,83 H. Ono,63,64 P. Oskin,44 P. Pakhlov,44,55 G. Pakhlova,20,44 S. Pardi,31 S.-H. Park,18 S. Paul,82,51 T. K. Pedlar,48 R. Pestotnik,35 L. E. Piilonen,87 T. Podobnik,46,35 V. Popov,20 E. Prencipe,21 M. T. Prim,2 A. Rostomyan,8 N. Rout,26 G. Russo,57 D. Sahoo,81 S. Sandilya,25 A. Sangal,7 L. Santelj,46,35 T. Sanuki,84 V. Savinov,70 G. Schnell,1,22 C. Schwanda,29 Y. Seino,64 K. Senyo,89 M. E. Sevior,52 M. Shapkin,30 C. Sharma,49 J.-G. Shiu,61 B. Shwartz,4,65 A. Sokolov,30 E. Solovieva,44 M. Starič,35 Z. S. Stottler,87 M. Sumihama,13 M. Takizawa,75,19,72 K. Tanida,34 Y. Tao,9 F. Tenchini,8 K. Trabelsi,43 T. Uglov,44,20 Y. Unno,16 K. Uno,64 S. Uno,18,14 P. Urquijo,52 Y. Usov,4,65 S. E. Vahsen,17 R. Van Tonder,2 G. Varner,17 A. Vinokurova,4,65 E. Waheed,18 C. H. Wang,60 E. Wang,70 M.-Z. Wang,61 P. Wang,28 S. Watanuki,43 O. Werbycka,62 E. Won,40 X. Xu,76 B. D. Yabsley,79 W. Yan,73 S. B. Yang,40 H. Ye,8 J. Yelton,9 J. H. Yin,40 C. Z. Yuan,28 Y. Yusa,64 Z. P. Zhang,73 V. Zhilich,4,65 and V. Zhukova44 13Gifu University, Gifu 501-1193 14SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193 15Gyeongsang National University, Jinju 52828 16Department of Physics and Institute of Natural Sciences, Hanyang University, Seoul 04763 17University of Hawaii, Honolulu, Hawaii 96822 18High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 19J-PARC Branch, KEK Theory Center, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 20National Research University Higher School of Economics, Moscow 101000 21Forschungszentrum Jülich, 52425 Jülich 22IKERBASQUE, Basque Foundation for Science, 48013 Bilbao 23Indian Institute of Science Education and Research Mohali, SAS Nagar, 140306
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