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：

PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2014年 / 2014卷 / 04期

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.

引用

页数：11

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