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

T. Iwashita; K. Miyabayashi; V. Bhardwaj; I. Adachi; H. Aihara; D. M. Asner; T. Aushev; A. M. Bakich; A. Bala; B. Bhuyan; G. Bonvicini; A. Bozek; M. Bračko; T. E. Browder; M. C. Chang; A. Chen; B. G. Cheon; K. Chilikin; R. Chistov; K. Cho; V. Chobanova; S. K. Choi; Y. Choi; D. Cinabro; J. Dalseno; M. Danilov; Z. Doležal; Z. Drásal; D. Dutta; S. Eidelman; S. Esen; H. Farhat; J. E. Fast; M. Feindt; T. Ferber; A. Frey; V. Gaur; N. Gabyshev; S. Ganguly; R. Gillard; Y. M. Goh; B. Golob; J. Haba; T. Hara; K. Hayasaka; H. Hayashii; T. Higuchi; Y. Horii; Y. Hoshi; W. S. Hou; H. J. Hyun; T. Iijima; A. Ishikawa; R. Itoh; Y. Iwasaki; I. Jaegle; T. Julius; D. H. Kah; J. H. Kang; E. Kato; T. Kawasaki; H. Kichimi; C. Kiesling; D. Y. Kim; H. J. Kim; H. O. Kim; J. B. Kim; J. H. Kim; M. J. Kim; Y. J. Kim; K. Kinoshita; J. Klucar; B. R. Ko; P. Kodyšs; S. Korpar; P. Križan; P. Krokovny; T. Kuhr; T. Kumita; A. Kuzmin; Y. J. Kwon; J. S. Lange; S. H. Lee; Y. Li; J. Libby; C. Liu; Y. Liu; P. Lukin; D. Matvienko; H. Miyata; R. Mizuk; A. Moll; T. Mori; Y. Nagasaka; E. Nakano; M. Nakao; H. Nakazawa; Z. Natkaniec; M. Nayak; C. Ng; N. K. Nisar; S. Nishida; O. Nitoh; S. Ogawa; S. Okuno; G. Pakhlova; E. Panzenböck; H. Park; H. K. Park; T. K. Pedlar; R. Pestotnik; M. Petrič; L. E. Piilonen; M. Ritter; M. Röhrken; A. Rostomyan; S. Ryu; H. Sahoo; T. Saito; K. Sakai; Y. Sakai; S. Sandilya; D. Santel; L. Santelj; T. Sanuki; V. Savinov; O. Schneider; G. Schnell; C. Schwanda; D. Semmler; K. Senyo; O. Seon; M. E. Sevior; M. Shapkin; C. P. Shen; T. A. Shibata; J. G. Shiu; B. Shwartz; A. Sibidanov; F. Simon; Y. S. Sohn; A. Sokolov; E. Solovieva; S. Stanič; M. Starič; M. Steder; T. Sumiyoshi; U. Tamponi; K. Tanida; G. Tatishvili; Y. Teramoto; K. Trabelsi; T. Tsuboyama; M. Uchida; S. Uehara; Y. Unno; S. Uno; P. Urquijo; P. Vanhoefer; G. Varner; K. E. Varvell; V. Vorobyev; A. Vossen; M. N. Wagner; C. H. Wang; M. Z. Wang; P. Wang; X. L. Wang; M. Watanabe; Y. Watanabe; K. M. Williams; E. Won; B. D. Yabsley; Y. Yamashita; S. Yashchenko; Y. Yook; C. Z. Yuan; Z. P. Zhang; V. Zhilich; A. Zupanc

doi:10.1093/ptep/ptu043

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

T. Iwashita
, K. Miyabayashi
, V. Bhardwaj
, I. Adachi
, H. Aihara
, D. M. Asner
, T. Aushev
, A. M. Bakich
, A. Bala
, B. Bhuyan
, G. Bonvicini
, A. Bozek
, M. Bračko
, T. E. Browder
, M. C. Chang
, A. Chen
, B. G. Cheon
, K. Chilikin
, R. Chistov
, K. Cho

V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. Doležal, Z. Drásal, D. Dutta, S. Eidelman, S. Esen, H. Farhat, J. E. Fast, M. Feindt, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, R. Gillard, Y. M. Goh, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, T. Higuchi, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, I. Jaegle, T. Julius, D. H. Kah, J. H. Kang, E. Kato, T. Kawasaki, H. Kichimi, C. Kiesling, D. Y. Kim, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, J. Klucar, B. R. Ko, P. Kodyšs, S. Korpar, P. Križan, P. Krokovny, T. Kuhr, T. Kumita, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, Y. Li, J. Libby, C. Liu, Y. Liu, P. Lukin, D. Matvienko, H. Miyata, R. Mizuk, A. Moll, T. Mori, Y. Nagasaka, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, M. Nayak, C. Ng, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, G. Pakhlova, E. Panzenböck, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Ritter, M. Röhrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, V. Savinov, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, C. P. Shen, T. A. Shibata, J. G. Shiu, B. Shwartz, A. Sibidanov, F. Simon, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, M. Steder, T. Sumiyoshi, U. Tamponi, K. Tanida, G. Tatishvili, Y. Teramoto, K. Trabelsi, T. Tsuboyama, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, P. Vanhoefer, G. Varner, K. E. Varvell, V. Vorobyev, A. Vossen, M. N. Wagner, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, Z. P. Zhang, V. Zhilich, A. Zupanc

Nara Women's University
High Energy Accelerator Research Organization, Tsukuba
The University of Tokyo
Pacific Northwest National Laboratory
Alikhanov Institute for Theoretical and Experimental Physics
The University of Sydney
Panjab University
Indian Institute of Technology Guwahati
Wayne State University
H. Niewodniczanski Institute of Nuclear Physics
University of Maribor
Jožef Stefan Institute
University of Hawai'i at Mānoa
Fu Jen Catholic University
National Central University
Hanyang University
Korea Institute of Science and Technology Information
Max Planck Institute for Physics (Werner Heisenberg Institute)
Gyeongsang National University
Sungkyunkwan University
Moscow Engineering Physics Institute
Charles University
Novosibirsk State University
University of Cincinnati
Karlsruhe Institute of Technology
German Electron Synchrotron
University of Göttingen
Tata Institute of Fundamental Research
University of Ljubljana
Nagoya University
Tohoku Gakuin University
National Taiwan University
Kyungpook National University
Tohoku University
University of Melbourne
Yonsei University
Niigata University
Soongsil University
Korea University
Tokyo Metropolitan University
Justus Liebig University Giessen
Virginia Polytechnic Institute and State University
Indian Institute of Technology Madras
University of Science and Technology of China
Hiroshima Institute of Technology
Osaka Metropolitan University
Tokyo University of Agriculture and Technology
Toho University
Kanagawa University
Luther College, Decorah
Seoul National University
University of Pittsburgh
Swiss Federal Institute of Technology Lausanne
University of the Basque Country
Ikerbasque Basque Foundation for Science
Austrian Academy of Sciences
Yamagata University
Institute for High Energy Physics
Beihang University
Institute of Science Tokyo
University of Nova Gorica
National Institute for Nuclear Physics
University of Turin
University of Bonn
Indiana University Bloomington
National United University Taiwan
CAS - Institute of High Energy Physics
Nippon Dental University

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

We report an observation of the B^±→ J/ψηK^± and B⁰ → J/ψηK⁰S decays using 772 × 10⁶BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. We obtain the branching fractions B(B?→ J/ψηK^±) = (1.27 ±0.11(stat.) ±0.11(syst.)) ×10^-4 and B(B⁰ → J/ψηK⁰ S ) = (5.22 ±0.78(stat.) ± 0.49(syst.)) ×10^-5. We search for a new narrow charmonium(-like) state X in the J/ψη mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, B(B±→ X K± )B(X → J/ψη), at 3872MeVc^-2 where aC-odd partner of X(3872) may exist, at ψ(4040) and ψ(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 X^C-odd(3872), ψ(4040), and ψ(4160) are 3.8 ×10^-6, 15.5 ×10^-6, and 7.4 ×10^-6, respectively.

Original language	English
Article number	43C01
Journal	Progress of Theoretical and Experimental Physics
Volume	2014
Issue number	4
DOIs	https://doi.org/10.1093/ptep/ptu043
State	Published - 16 Apr 2014

Access to Document

10.1093/ptep/ptu043

Cite this

Iwashita, T., Miyabayashi, K., Bhardwaj, V., Adachi, I., Aihara, H., Asner, D. M., Aushev, T., Bakich, A. M., Bala, A., Bhuyan, B., Bonvicini, G., Bozek, A., Bračko, M., Browder, T. E., Chang, M. C., Chen, A., Cheon, B. G., Chilikin, K., Chistov, R., ... Zupanc, A. (2014). Measurement of branching fractions for B → J/ψηK decays and search for a narrow resonance in the J/ψη final state. Progress of Theoretical and Experimental Physics, 2014(4), Article 43C01. https://doi.org/10.1093/ptep/ptu043

@article{42039912479b4c4ba98adaf1147cbee3,

title = "Measurement of branching fractions for B → J/ψηK decays and search for a narrow resonance in the J/ψη final state",

abstract = "We report an observation of the B±→ J/ψηK± and B0 → J/ψηK0S decays using 772 × 106BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the branching fractions B(B?→ J/ψηK±) = (1.27 ±0.11(stat.) ±0.11(syst.)) ×10-4 and B(B0 → J/ψηK0 S ) = (5.22 ±0.78(stat.) ± 0.49(syst.)) ×10-5. We search for a new narrow charmonium(-like) state X in the J/ψη mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, B(B±→ X K± )B(X → J/ψη), at 3872MeVc-2 where aC-odd partner of X(3872) may exist, at ψ(4040) and ψ(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), ψ(4040), and ψ(4160) are 3.8 ×10-6, 15.5 ×10-6, and 7.4 ×10-6, respectively.",

author = "T. Iwashita and K. Miyabayashi and V. Bhardwaj and I. Adachi and H. Aihara and Asner, \{D. M.\} and T. Aushev and Bakich, \{A. M.\} and A. Bala and B. Bhuyan and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and Chang, \{M. C.\} and A. Chen and Cheon, \{B. G.\} and K. Chilikin and R. Chistov and K. Cho and V. Chobanova and Choi, \{S. K.\} and Y. Choi and D. Cinabro and J. Dalseno and M. Danilov and Z. Dole{\v z}al and Z. Dr{\'a}sal and D. Dutta and S. Eidelman and S. Esen and H. Farhat and Fast, \{J. E.\} and M. Feindt and T. Ferber and A. Frey and V. Gaur and N. Gabyshev and S. Ganguly and R. Gillard and Goh, \{Y. M.\} and B. Golob and J. Haba and T. Hara and K. Hayasaka and H. Hayashii and T. Higuchi and Y. Horii and Y. Hoshi and Hou, \{W. S.\} and Hyun, \{H. J.\} and T. Iijima and A. Ishikawa and R. Itoh and Y. Iwasaki and I. Jaegle and T. Julius and Kah, \{D. H.\} and Kang, \{J. H.\} and E. Kato and T. Kawasaki and H. Kichimi and C. Kiesling and Kim, \{D. Y.\} and Kim, \{H. J.\} and Kim, \{H. O.\} and Kim, \{J. B.\} and Kim, \{J. H.\} and Kim, \{M. J.\} and Kim, \{Y. J.\} and K. Kinoshita and J. Klucar and Ko, \{B. R.\} and P. Kody{\v s}s and S. Korpar and P. Kri{\v z}an and P. Krokovny and T. Kuhr and T. Kumita and A. Kuzmin and Kwon, \{Y. J.\} and Lange, \{J. S.\} and Lee, \{S. H.\} and Y. Li and J. Libby and C. Liu and Y. Liu and P. Lukin and D. Matvienko and H. Miyata and R. Mizuk and A. Moll and T. Mori and Y. Nagasaka and E. Nakano and M. Nakao and H. Nakazawa and Z. Natkaniec and M. Nayak and C. Ng and Nisar, \{N. K.\} and S. Nishida and O. Nitoh and S. Ogawa and S. Okuno and G. Pakhlova and E. Panzenb{\"o}ck and H. Park and Park, \{H. K.\} and Pedlar, \{T. K.\} and R. Pestotnik and M. Petri{\v c} and Piilonen, \{L. E.\} and M. Ritter and M. R{\"o}hrken and A. Rostomyan and S. Ryu and H. Sahoo and T. Saito and K. Sakai and Y. Sakai and S. Sandilya and D. Santel and L. Santelj and T. Sanuki and V. Savinov and O. Schneider and G. Schnell and C. Schwanda and D. Semmler and K. Senyo and O. Seon and Sevior, \{M. E.\} and M. Shapkin and Shen, \{C. P.\} and Shibata, \{T. A.\} and Shiu, \{J. G.\} and B. Shwartz and A. Sibidanov and F. Simon and Sohn, \{Y. S.\} and A. Sokolov and E. Solovieva and S. Stani{\v c} and M. Stari{\v c} and M. Steder and T. Sumiyoshi and U. Tamponi and K. Tanida and G. Tatishvili and Y. Teramoto and K. Trabelsi and T. Tsuboyama and M. Uchida and S. Uehara and Y. Unno and S. Uno and P. Urquijo and P. Vanhoefer and G. Varner and Varvell, \{K. E.\} and V. Vorobyev and A. Vossen and Wagner, \{M. N.\} and Wang, \{C. H.\} and Wang, \{M. Z.\} and P. Wang and Wang, \{X. L.\} and M. Watanabe and Y. Watanabe and Williams, \{K. M.\} and E. Won and Yabsley, \{B. D.\} and Y. Yamashita and S. Yashchenko and Y. Yook and Yuan, \{C. Z.\} and Zhang, \{Z. P.\} and V. Zhilich and A. Zupanc",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2014.",

year = "2014",

month = apr,

day = "16",

doi = "10.1093/ptep/ptu043",

language = "English",

volume = "2014",

journal = "Progress of Theoretical and Experimental Physics",

issn = "2050-3911",

publisher = "Oxford University Press",

number = "4",

}

Iwashita, T, Miyabayashi, K, Bhardwaj, V, Adachi, I, Aihara, H, Asner, DM, Aushev, T, Bakich, AM, Bala, A, Bhuyan, B, Bonvicini, G, Bozek, A, Bračko, M, Browder, TE, Chang, MC, Chen, A, Cheon, BG, Chilikin, K, Chistov, R, Cho, K, Chobanova, V, Choi, SK, Choi, Y, Cinabro, D, Dalseno, J, Danilov, M, Doležal, Z, Drásal, Z, Dutta, D, Eidelman, S, Esen, S, Farhat, H, Fast, JE, Feindt, M, Ferber, T, Frey, A, Gaur, V, Gabyshev, N, Ganguly, S, Gillard, R, Goh, YM, Golob, B, Haba, J, Hara, T, Hayasaka, K, Hayashii, H, Higuchi, T, Horii, Y, Hoshi, Y, Hou, WS, Hyun, HJ, Iijima, T, Ishikawa, A, Itoh, R, Iwasaki, Y, Jaegle, I, Julius, T, Kah, DH, Kang, JH, Kato, E, Kawasaki, T, Kichimi, H, Kiesling, C, Kim, DY, Kim, HJ, Kim, HO, Kim, JB, Kim, JH, Kim, MJ, Kim, YJ, Kinoshita, K, Klucar, J, Ko, BR, Kodyšs, P, Korpar, S, Križan, P, Krokovny, P, Kuhr, T, Kumita, T, Kuzmin, A, Kwon, YJ, Lange, JS, Lee, SH, Li, Y, Libby, J, Liu, C, Liu, Y, Lukin, P, Matvienko, D, Miyata, H, Mizuk, R, Moll, A, Mori, T, Nagasaka, Y, Nakano, E, Nakao, M, Nakazawa, H, Natkaniec, Z, Nayak, M, Ng, C, Nisar, NK, Nishida, S, Nitoh, O, Ogawa, S, Okuno, S, Pakhlova, G, Panzenböck, E, Park, H, Park, HK, Pedlar, TK, Pestotnik, R, Petrič, M, Piilonen, LE, Ritter, M, Röhrken, M, Rostomyan, A, Ryu, S, Sahoo, H, Saito, T, Sakai, K, Sakai, Y, Sandilya, S, Santel, D, Santelj, L, Sanuki, T, Savinov, V, Schneider, O, Schnell, G, Schwanda, C, Semmler, D, Senyo, K, Seon, O, Sevior, ME, Shapkin, M, Shen, CP, Shibata, TA, Shiu, JG, Shwartz, B, Sibidanov, A, Simon, F, Sohn, YS, Sokolov, A, Solovieva, E, Stanič, S, Starič, M, Steder, M, Sumiyoshi, T, Tamponi, U, Tanida, K, Tatishvili, G, Teramoto, Y, Trabelsi, K, Tsuboyama, T, Uchida, M, Uehara, S, Unno, Y, Uno, S, Urquijo, P, Vanhoefer, P, Varner, G, Varvell, KE, Vorobyev, V, Vossen, A, Wagner, MN, Wang, CH, Wang, MZ, Wang, P, Wang, XL, Watanabe, M, Watanabe, Y, Williams, KM, Won, E, Yabsley, BD, Yamashita, Y, Yashchenko, S, Yook, Y, Yuan, CZ, Zhang, ZP, Zhilich, V & Zupanc, A 2014, 'Measurement of branching fractions for B → J/ψηK decays and search for a narrow resonance in the J/ψη final state', Progress of Theoretical and Experimental Physics, vol. 2014, no. 4, 43C01. https://doi.org/10.1093/ptep/ptu043

TY - JOUR

T1 - Measurement of branching fractions for B → J/ψηK decays and search for a narrow resonance in the J/ψη final state

AU - Iwashita, T.

AU - Miyabayashi, K.

AU - Bhardwaj, V.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Bala, A.

AU - Bhuyan, B.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Chang, M. C.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Cho, K.

AU - Chobanova, V.

AU - Choi, S. K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Dalseno, J.

AU - Danilov, M.

AU - Doležal, Z.

AU - Drásal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Esen, S.

AU - Farhat, H.

AU - Fast, J. E.

AU - Feindt, M.

AU - Ferber, T.

AU - Frey, A.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Ganguly, S.

AU - Gillard, R.

AU - Goh, Y. M.

AU - Golob, B.

AU - Haba, J.

AU - Hara, T.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Higuchi, T.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwasaki, Y.

AU - Jaegle, I.

AU - Julius, T.

AU - Kah, D. H.

AU - Kang, J. H.

AU - Kato, E.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kiesling, C.

AU - Kim, D. Y.

AU - Kim, H. J.

AU - Kim, H. O.

AU - Kim, J. B.

AU - Kim, J. H.

AU - Kim, M. J.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Klucar, J.

AU - Ko, B. R.

AU - Kodyšs, P.

AU - Korpar, S.

AU - Križan, P.

AU - Krokovny, P.

AU - Kuhr, T.

AU - Kumita, T.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lange, J. S.

AU - Lee, S. H.

AU - Li, Y.

AU - Libby, J.

AU - Liu, C.

AU - Liu, Y.

AU - Lukin, P.

AU - Matvienko, D.

AU - Miyata, H.

AU - Mizuk, R.

AU - Moll, A.

AU - Mori, T.

AU - Nagasaka, Y.

AU - Nakano, E.

AU - Nakao, M.

AU - Nakazawa, H.

AU - Natkaniec, Z.

AU - Nayak, M.

AU - Ng, C.

AU - Nisar, N. K.

AU - Nishida, S.

AU - Nitoh, O.

AU - Ogawa, S.

AU - Okuno, S.

AU - Pakhlova, G.

AU - Panzenböck, E.

AU - Park, H.

AU - Park, H. K.

AU - Pedlar, T. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Ritter, M.

AU - Röhrken, M.

AU - Rostomyan, A.

AU - Ryu, S.

AU - Sahoo, H.

AU - Saito, T.

AU - Sakai, K.

AU - Sakai, Y.

AU - Sandilya, S.

AU - Santel, D.

AU - Santelj, L.

AU - Sanuki, T.

AU - Savinov, V.

AU - Schneider, O.

AU - Schnell, G.

AU - Schwanda, C.

AU - Semmler, D.

AU - Senyo, K.

AU - Seon, O.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shen, C. P.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Sibidanov, A.

AU - Simon, F.

AU - Sohn, Y. S.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Stanič, S.

AU - Starič, M.

AU - Steder, M.

AU - Sumiyoshi, T.

AU - Tamponi, U.

AU - Tanida, K.

AU - Tatishvili, G.

AU - Teramoto, Y.

AU - Trabelsi, K.

AU - Tsuboyama, T.

AU - Uchida, M.

AU - Uehara, S.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Vanhoefer, P.

AU - Varner, G.

AU - Varvell, K. E.

AU - Vorobyev, V.

AU - Vossen, A.

AU - Wagner, M. N.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Wang, P.

AU - Wang, X. L.

AU - Watanabe, M.

AU - Watanabe, Y.

AU - Williams, K. M.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Yashchenko, S.

AU - Yook, Y.

AU - Yuan, C. Z.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zupanc, A.

PY - 2014/4/16

Y1 - 2014/4/16

N2 - We report an observation of the B±→ J/ψηK± and B0 → J/ψηK0S decays using 772 × 106BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the branching fractions B(B?→ J/ψηK±) = (1.27 ±0.11(stat.) ±0.11(syst.)) ×10-4 and B(B0 → J/ψηK0 S ) = (5.22 ±0.78(stat.) ± 0.49(syst.)) ×10-5. We search for a new narrow charmonium(-like) state X in the J/ψη mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, B(B±→ X K± )B(X → J/ψη), at 3872MeVc-2 where aC-odd partner of X(3872) may exist, at ψ(4040) and ψ(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), ψ(4040), and ψ(4160) are 3.8 ×10-6, 15.5 ×10-6, and 7.4 ×10-6, respectively.

AB - We report an observation of the B±→ J/ψηK± and B0 → J/ψηK0S decays using 772 × 106BB¯ pairs collected at the γ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the branching fractions B(B?→ J/ψηK±) = (1.27 ±0.11(stat.) ±0.11(syst.)) ×10-4 and B(B0 → J/ψηK0 S ) = (5.22 ±0.78(stat.) ± 0.49(syst.)) ×10-5. We search for a new narrow charmonium(-like) state X in the J/ψη mass spectrum and find no significant excess. We set upper limits on the product of branching fractions, B(B±→ X K± )B(X → J/ψη), at 3872MeVc-2 where aC-odd partner of X(3872) may exist, at ψ(4040) and ψ(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), ψ(4040), and ψ(4160) are 3.8 ×10-6, 15.5 ×10-6, and 7.4 ×10-6, respectively.

UR - https://www.scopus.com/pages/publications/84924411993

U2 - 10.1093/ptep/ptu043

DO - 10.1093/ptep/ptu043

M3 - Article

AN - SCOPUS:84924411993

SN - 2050-3911

VL - 2014

JO - Progress of Theoretical and Experimental Physics

JF - Progress of Theoretical and Experimental Physics

IS - 4

M1 - 43C01

ER -

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

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