Observation of charmed strange meson pair production inpartial derivative2S decays and in e⁺e^- annihilation at p^ffis^ffi=10.52 GeV

B. S. Gao,W. J. Zhu,X. L. Wang,I. Adachi, H. Aihara,D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu,Sw Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka,D. Biswas, A. Bobrov, D. Bodrov, A. Bondar, A. Bozek, M. Bracko, P. Branchini,T. E. Browder, A. Budano, D. Cervenkov,M. C. Chang,P. Chang, V. Chekelian, B. G. Cheon, K. Chilikin,H. E. Cho, K. Cho,S. K. Choi,Y. Choi, S. Choudhury,D. Cinabro,G. De Nardo,G. De Pietro, R. Dhamija,F. Di Capua,J. Dingfelder, Z. Dolezal, T. V. Dong, P. Ecker, T. Ferber, D. Ferlewicz,B. G. Fulsom, V. Gaur, A. Giri, E. Graziani, T. Gu, K. Gudkova, C. Hadjivasiliou, K. Hayasaka, H. Hayashii, S. Hazra, M. T. Hedges, D. Herrmann,W. S. Hou,C. L. Hsu, T. Iijima, K. Inami,N. Ipsita,A. Ishikawa, R. Itoh, M. Iwasaki,W. W. Jacobs, E. J. Jang, S. Jia, Y. Jin,K. K. Joo, T. Kawasaki, C. Kiesling,C. H. Kim,D. Y. Kim,K. H. Kim,Y. K. Kim,K. Kinoshita, P. Kodys, T. Konno,A. Korobov, S. Korpar, P. Krizan, M. Kumar,R. Kumar,K. Kumara,A. Kuzmin,Y. J. Kwon,Y. T. Lai,S. C. Lee, D. Levit, P. Lewis,L. K. Li,L. Li Gioi, J. Libby, K. Lieret, D. Liventsev, Y. Ma, M. Masuda, T. Matsuda, S. K. Maurya, F. Meier,M. Merola, R. Mizuk, I. Nakamura, M. Nakao, D. Narwal,A. Natochii, L. Nayak, M. Niiyama,N. K. Nisar, S. Nishida, S. Ogawa, P. Pakhlov, G. Pakhlova, S. Pardi, J. Park, S. Patra,S. Paul,T. K. Pedlar, R. Pestotnik,L. E. Piilonen, T. Podobnik, E. Prencipe, M. T. Prim, G. Russo, S. Sandilya, V. Savinov,G. Schnell, C. Schwanda, Y. Seino, K. Senyo,M. E. Sevior, W. Shan, C. Sharma,J. G. Shiu,B. Shwartz, E. Solovieva, M. Staric, Z. S. Stottler, M. Sumihama, K. Tanida, F. Tenchini, M. Uchida, T. Uglov, Y. Unno,S. Uno,S. E. Vahsen,K. E. Varvell, D. Wang, E. Wang,M. Z. Wang, S. Watanuki, E. Won, X. Xu,B. D. Yabsley, W. Yan,S. B. Yang,J. H. Yin, Y. Yook, C. Z. Yuan, L. Yuan, V. Zhilich, V. Zhukova

PHYSICAL REVIEW D（2023）

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摘要

We observe the process gamma partial derivative 2S Rho -> D(s)o*PPD- (S) and continuum production ethorne-. Dso*THORNthornD- at p(ffi)s(ffi) 1/4 10.52 GeV (and their charge conjugates) using the data samples collected by the Belle detector at KEKB, where D- is Ds1o2536THORN- or D* o2573THORN-. Both D- states are identified through their decay into K D o*THORN. We measure the products of branching fractions Bo.o2STHORN. Dso*THORNthornD- THORNBoD-. K D o*THORNTHORN and the Born cross sections sBornoethorne-. Dso*THORNthornD- THORNBoD-. K D o*THORNTHORN, and then compare the ratios R1 = Bo.o2STHORN. Dso*THORNthornD- THORN=Bo.o2STHORN. mu thorn mu-THORN for.o2STHORN decays and R2 = sBornoethorne-. Dso*THORNthornD- THORN=sBornoethorne-. mu thorn mu-THORN for continuum production. We obtain R1=R2 1/4 9.7 +/- 2.3 +/- 1.1, 6.8 +/- 2.1 +/- 0.8, 10.2 +/- 3.3 +/- 2.5, and 3.4 +/- 2.1 +/- 0.8 for the DsthornDs1o2536THORN-, Ds*thornDs1o2536THORN-, DsthornDs* 2o2573THORN-, and Ds*thornD* o2573THORN- final states in the D-. K- D o*THORN0 modes, respectively. The measured R1=R2 values indicate that the strong decay dominates in.o2STHORN. Dso*THORNthornD- processes. We also measure the ratios of branching fractions BoDs1o2536THORN-. K0D*o2010THORN-THORN=BoDs1o2536THORN-. K-D*o2007THORN0THORN 1/4 0.48 +/- 0.07 +/- 0.02 and B Ds* 2 2573 -. K0D- =B Ds* 2 2573 -. K-D0 0.49 0.10 0.02, which are consistent with isospin symmetry. The second ratio is the first measurement of this quantity. Here, the first uncertainties are statistical and the second are systematic.

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Observation of charmed strange meson pair production inpartial derivative2S decays and in e+e- annihilation at pffisffi=10.52 GeV

Observation of charmed strange meson pair production inpartial derivative2S decays and in e⁺e^- annihilation at p^ffis^ffi=10.52 GeV