Measurement of branching fractions for B → J/ψη K decays and search for a narrow resonance in the J/ψη final state

被引:14
|
作者
Iwashita, T. [1 ]
Miyabayashi, K. [1 ]
Bhardwaj, V. [1 ]
Adachi, I. [2 ]
Aihara, H. [3 ]
Asner, D. M. [4 ]
Aushev, T. [5 ]
Bakich, A. M. [6 ]
Bala, A. [7 ]
Bhuyan, B. [8 ]
Bonvicini, G. [9 ]
Bozek, A. [10 ]
Bracko, M. [11 ,12 ]
Browder, T. E. [13 ]
Chang, M. -C. [14 ]
Chen, A. [15 ]
Cheon, B. G. [16 ]
Chilikin, K. [5 ]
Chistov, R. [5 ]
Cho, K. [17 ]
Chobanova, V. [18 ]
Choi, S. -K. [19 ]
Choi, Y. [20 ]
Cinabro, D. [9 ]
Dalseno, J. [18 ,20 ]
Danilov, M. [5 ,21 ]
Dolezal, Z. [22 ]
Drasal, Z. [22 ]
Dutta, D. [8 ]
Eidelman, S. [23 ,24 ]
Esen, S. [25 ]
Farhat, H. [9 ]
Fast, J. E. [4 ]
Feindt, M. [26 ]
Ferber, T. [27 ]
Frey, A. [28 ]
Gaur, V. [29 ]
Gabyshev, N. [23 ,24 ]
Ganguly, S. [9 ]
Gillard, R. [9 ]
Goh, Y. M. [16 ]
Golob, B. [12 ,30 ]
Haba, J. [2 ]
Hara, T. [2 ]
Hayasaka, K. [31 ]
Hayashii, H. [1 ]
Higuchi, T. [32 ]
Horii, Y. [31 ]
Hoshi, Y. [33 ]
Hou, W. -S. [34 ]
机构
[1] Nara Womens Univ, Nara 6308506, Japan
[2] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan
[3] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan
[4] Pacific NW Natl Lab, Richland, WA 99352 USA
[5] Inst Theoret & Expt Phys, Moscow 117218, Russia
[6] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia
[7] Panjab Univ, Chandigarh 160014, India
[8] Indian Inst Technol Guwahati, Gauhati 781039, Assam, India
[9] Wayne State Univ, Detroit, MI 48202 USA
[10] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
[11] Univ Maribor, SLO-2000 Maribor, Slovenia
[12] Jozef Stefan Inst, Ljubljana 1000, Slovenia
[13] Univ Hawaii, Honolulu, HI 96822 USA
[14] Fu Jen Catholic Univ, Dept Phys, Taipei 24205, Taiwan
[15] Natl Cent Univ, Chungli 32054, Taiwan
[16] Hanyang Univ, Seoul 133791, South Korea
[17] Korea Inst Sci & Technol Informat, Taejon 305806, South Korea
[18] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[19] Gyeongsang Natl Univ, Chinju 660701, South Korea
[20] Sungkyunkwan Univ, Suwon 440746, South Korea
[21] Moscow Engn Phys Inst, Moscow 115409, Russia
[22] Charles Univ Prague, Fac Math & Phys, CR-12116 Prague, Czech Republic
[23] Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia
[24] Novosibirsk State Univ, Novosibirsk 630090, Russia
[25] Univ Cincinnati, Cincinnati, OH 45221 USA
[26] Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany
[27] DESY, D-22607 Hamburg, Germany
[28] Univ Gottingen, Inst Phys 2, D-37073 Gottingen, Germany
[29] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India
[30] Univ Ljubljana, Fac Math & Phys, Ljubljana 1000, Slovenia
[31] Nagoya Univ, Kobayashi Maskawa Inst, Nagoya, Aichi 4648602, Japan
[32] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan
[33] Tohoku Gakuin Univ, Tagajo, Miyagi 9858537, Japan
[34] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
[35] Kyungpook Natl Univ, Taegu 702701, South Korea
[36] Nagoya Univ, Grad Sch Sci, Nagoya, Aichi 4648602, Japan
[37] Tohoku Univ, Sendai, Miyagi 9808578, Japan
[38] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia
[39] Yonsei Univ, Seoul 120749, South Korea
[40] Niigata Univ, Niigata 9502181, Japan
[41] Soongsil Univ, Seoul 156743, South Korea
[42] Korea Univ, Seoul 136713, South Korea
[43] Tokyo Metropolitan Univ, Tokyo 1920397, Japan
[44] Univ Giessen, D-35392 Giessen, Germany
[45] Virginia Polytech Inst & State Univ, CNP, Blacksburg, VA 24061 USA
[46] Indian Inst Technol Madras, Madras 600036, Tamil Nadu, India
[47] Univ Sci & Technol China, Hefei 230026, Peoples R China
[48] Hiroshima Inst Technol, Hiroshima 7315193, Japan
[49] Osaka City Univ, Osaka 5588585, Japan
[50] Tokyo Univ Agr & Technol, Koganei, Tokyo 1848588, Japan
来源
关键词
MESONS; MECHANISM; X(3872);
D O I
10.1093/ptep/ptu043
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report an observation of the B-+/- -> J/psi eta K-+/- and B-0 -> J/psi eta K-S(0) decays using 772 x 10(6)B (B) over bar pairs collected at the gamma (4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain the branching fractions B(B-+/- -> J/psi eta K-+/-) = (1.27 +/- 0.11 (stat.) +/- 0.11 ( syst.)) x 10(- 4) and B(B-0 -> J/psi eta K-S(0)) = ( 5.22 +/- 0.78 (stat.) +/- 0.49 (syst.)) x 10(-5). We search for a new narrow charmonium(- like) state X in the J/psi eta mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, B(B-+/- -> XK +/-) B(X -> J/psi eta), at 3872 MeV c(-2) where a C-odd partner of X(3872) may exist, psi(4040) and psi(4160) assuming their known mass and width, and over a range from 3.8 to 4.8 GeV c(-2). The obtained upper limits at 90% confidence level for XC-odd(3872), psi(4040), and psi(4160) are 3.8 x 10(-6), 15.5 x 10(-6), and 7.4 x 10(-6), respectively.
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页数:11
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