Study of B ±→K ±(K SKπ) 0 decay and determination of η c and η c(2S) parameters

A. Vinokurova; A. Kuzmin; S. Eidelman; K. Arinstein; V. Aulchenko; T. Aushev; A. M. Bakich; V. Balagura; E. Barberio; K. Belous; V. Bhardwaj; A. Bondar; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; M. C. Chang; Y. Chao; A. Chen; P. Chen; B. G. Cheon; R. Chistov; I. S. Cho; K. Cho; S. K. Choi; Y. Choi; J. Dalseno; M. Danilov; Z. Doležal; D. Epifanov; V. Gaur; N. Gabyshev; A. Garmash; B. Golob; H. Ha; J. Haba; H. Hayashii; Y. Horii; Y. Hoshi; W. S. Hou; Y. B. Hsiung; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; R. Itoh; M. Iwabuchi; T. Iwashita; T. Julius; J. H. Kang; P. Kapusta; T. Kawasaki; C. Kiesling; H. J. Kim; H. O. Kim; M. J. Kim; Y. J. Kim; K. Kinoshita; B. R. Ko; P. Križan; R. Kumar; T. Kumita; Y. J. Kwon; S. H. Kyeong; M. J. Lee; S. H. Lee; J. Li; Y. Li; C. L. Lim; C. Liu; D. Liventsev; R. Louvot; D. Matvienko; A. Matyja; S. McOnie; K. Miyabayashi; H. Miyata; Y. Miyazaki; R. Mizuk; G. B. Mohanty; A. Moll; E. Nakano; H. Nakazawa; Z. Natkaniec; S. Nishida; O. Nitoh; T. Ohshima; S. Okuno; S. L. Olsen; P. Pakhlov; G. Pakhlova; C. W. Park; R. Pestotnik; M. Petrič; L. E. Piilonen; A. Poluektov; M. Röhrken; S. Ryu; H. Sahoo; Y. Sakai; O. Schneider; C. Schwanda; K. Senyo; O. Seon; M. Shapkin; V. Shebalin; C. P. Shen; J. G. Shiu; B. Shwartz; F. Simon; P. Smerkol; Y. S. Sohn; A. Sokolov; E. Solovieva; S. Stanič; M. Starič; M. Sumihama; T. Sumiyoshi; S. Tanaka; Y. Teramoto; I. Tikhomirov; K. Trabelsi; M. Uchida; T. Uglov; Y. Unno; S. Uno; Y. Usov; G. Varner; K. E. Varvell; A. Vossen; C. H. Wang; P. Wang; M. Watanabe; Y. Watanabe; K. M. Williams; E. Won; B. D. Yabsley; Y. Yamashita; C. Z. Yuan; Z. P. Zhang; V. Zhilich; P. Zhou; V. Zhulanov; A. Zupanc; O. Zyukova

doi:10.1016/j.physletb.2011.11.014

Study of B ^±→K ^±(K _SKπ) ⁰ decay and determination of η _c and η _c(2S) parameters

A. Vinokurova, A. Kuzmin, S. Eidelman, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, V. Bhardwaj, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M. C. Chang, Y. Chao, A. Chen, P. ChenB. G. Cheon, R. Chistov, I. S. Cho, K. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Danilov, Z. Doležal, D. Epifanov, V. Gaur, N. Gabyshev, A. Garmash, B. Golob, H. Ha, J. Haba, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwabuchi, T. Iwashita, T. Julius, J. H. Kang, P. Kapusta, T. Kawasaki, C. Kiesling, H. J. Kim, H. O. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, P. Križan, R. Kumar, T. Kumita, Y. J. Kwon, S. H. Kyeong, M. J. Lee, S. H. Lee, J. Li, Y. Li, C. L. Lim, C. Liu, D. Liventsev, R. Louvot, D. Matvienko, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. B. Mohanty, A. Moll, E. Nakano, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, O. Seon, M. Shapkin, V. Shebalin, C. P. Shen, J. G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. S. Sohn, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, M. Sumihama, T. Sumiyoshi, S. Tanaka, Y. Teramoto, I. Tikhomirov, K. Trabelsi, M. Uchida, T. Uglov, Y. Unno, S. Uno, Y. Usov, G. Varner, K. E. Varvell, A. Vossen, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhilich, P. Zhou, V. Zhulanov, A. Zupanc, O. Zyukova

Department of Physics

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

28 Citations (Scopus)

Abstract

We report the results of a study of B ^±→K ^±η _c and B ^±→K ^±η _c(2S) decays followed by η _c and η _c(2S) decays to (K _SKπ) ⁰. The results are obtained from a data sample containing 535 million BB _--meson pairs collected by the Belle experiment at the KEKB e ⁺e ^- collider. We measure the products of the branching fractions B(B±→K±ηc)B(ηc→KSK±π∓)=(26.7±1.4(stat)-2.6+2.9(syst)±4.9(model))×10-6 and B(B±→K±ηc(2S))B(ηc(2S)→KSK±π∓)=(3.4-1.5+2.2(stat+model)-0.4+0.5(syst))×10-6. Interference with the non-resonant component leads to significant model uncertainty in the measurement of these product branching fractions. Our analysis accounts for this interference and allows the model uncertainty to be reduced. We also obtain the following charmonia masses and widths: M(ηc)=(2985.4±1.5(stat)-2.0+0.5(syst)) MeV/c2, Γ(ηc)=(35.1±3.1(stat)-1.6+1.0(syst)) MeV/c2, M(ηc(2S))=(3636.1-4.2+3.9(stat+model)-2.0+0.7(syst)) MeV/c2, Γ(ηc(2S))=(6.6-5.1+8.4(stat+model)-0.9+2.6(syst)) MeV/c2.

Original language	English
Pages (from-to)	139-149
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	706
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2011.11.014
Publication status	Published - 2011 Dec 6

Keywords

B decay
Etac

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2011.11.014

Cite this

Vinokurova, A., Kuzmin, A., Eidelman, S., Arinstein, K., Aulchenko, V., Aushev, T., Bakich, A. M., Balagura, V., Barberio, E., Belous, K., Bhardwaj, V., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Browder, T. E., Chang, M. C., Chao, Y., Chen, A., ... Zyukova, O. (2011). Study of B ^±→K ^±(K _SKπ) ⁰ decay and determination of η _c and η _c(2S) parameters. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 706(2-3), 139-149. https://doi.org/10.1016/j.physletb.2011.11.014

Vinokurova, A, Kuzmin, A, Eidelman, S, Arinstein, K, Aulchenko, V, Aushev, T, Bakich, AM, Balagura, V, Barberio, E, Belous, K, Bhardwaj, V, Bondar, A, Bozek, A, Bračko, M, Brodzicka, J, Browder, TE, Chang, MC, Chao, Y, Chen, A, Chen, P, Cheon, BG, Chistov, R, Cho, IS, Cho, K, Choi, SK, Choi, Y, Dalseno, J, Danilov, M, Doležal, Z, Epifanov, D, Gaur, V, Gabyshev, N, Garmash, A, Golob, B, Ha, H, Haba, J, Hayashii, H, Horii, Y, Hoshi, Y, Hou, WS, Hsiung, YB, Hyun, HJ, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwabuchi, M, Iwashita, T, Julius, T, Kang, JH, Kapusta, P, Kawasaki, T, Kiesling, C, Kim, HJ, Kim, HO, Kim, MJ, Kim, YJ, Kinoshita, K, Ko, BR, Križan, P, Kumar, R, Kumita, T, Kwon, YJ, Kyeong, SH, Lee, MJ, Lee, SH, Li, J, Li, Y, Lim, CL, Liu, C, Liventsev, D, Louvot, R, Matvienko, D, Matyja, A, McOnie, S, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mizuk, R, Mohanty, GB, Moll, A, Nakano, E, Nakazawa, H, Natkaniec, Z, Nishida, S, Nitoh, O, Ohshima, T, Okuno, S, Olsen, SL, Pakhlov, P, Pakhlova, G, Park, CW, Pestotnik, R, Petrič, M, Piilonen, LE, Poluektov, A, Röhrken, M, Ryu, S, Sahoo, H, Sakai, Y, Schneider, O, Schwanda, C, Senyo, K, Seon, O, Shapkin, M, Shebalin, V, Shen, CP, Shiu, JG, Shwartz, B, Simon, F, Smerkol, P, Sohn, YS, Sokolov, A, Solovieva, E, Stanič, S, Starič, M, Sumihama, M, Sumiyoshi, T, Tanaka, S, Teramoto, Y, Tikhomirov, I, Trabelsi, K, Uchida, M, Uglov, T, Unno, Y, Uno, S, Usov, Y, Varner, G, Varvell, KE, Vossen, A, Wang, CH, Wang, P, Watanabe, M, Watanabe, Y, Williams, KM, Won, E, Yabsley, BD, Yamashita, Y, Yuan, CZ, Zhang, ZP, Zhilich, V, Zhou, P, Zhulanov, V, Zupanc, A & Zyukova, O 2011, 'Study of B ^±→K ^±(K _SKπ) ⁰ decay and determination of η _c and η _c(2S) parameters', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 706, no. 2-3, pp. 139-149. https://doi.org/10.1016/j.physletb.2011.11.014

@article{68c7c4fc8251484891e5e432c370594d,

title = "Study of B ±→K ±(K SKπ) 0 decay and determination of η c and η c(2S) parameters",

abstract = "We report the results of a study of B ±→K ±η c and B ±→K ±η c(2S) decays followed by η c and η c(2S) decays to (K SKπ) 0. The results are obtained from a data sample containing 535 million BB --meson pairs collected by the Belle experiment at the KEKB e +e - collider. We measure the products of the branching fractions B(B±→K±ηc)B(ηc→KSK±π∓)=(26.7±1.4(stat)-2.6+2.9(syst)±4.9(model))×10-6 and B(B±→K±ηc(2S))B(ηc(2S)→KSK±π∓)=(3.4-1.5+2.2(stat+model)-0.4+0.5(syst))×10-6. Interference with the non-resonant component leads to significant model uncertainty in the measurement of these product branching fractions. Our analysis accounts for this interference and allows the model uncertainty to be reduced. We also obtain the following charmonia masses and widths: M(ηc)=(2985.4±1.5(stat)-2.0+0.5(syst)) MeV/c2, Γ(ηc)=(35.1±3.1(stat)-1.6+1.0(syst)) MeV/c2, M(ηc(2S))=(3636.1-4.2+3.9(stat+model)-2.0+0.7(syst)) MeV/c2, Γ(ηc(2S))=(6.6-5.1+8.4(stat+model)-0.9+2.6(syst)) MeV/c2.",

keywords = "B decay, Etac",

author = "A. Vinokurova and A. Kuzmin and S. Eidelman and K. Arinstein and V. Aulchenko and T. Aushev and Bakich, {A. M.} and V. Balagura and E. Barberio and K. Belous and V. Bhardwaj and A. Bondar and A. Bozek and M. Bra{\v c}ko and J. Brodzicka and Browder, {T. E.} and Chang, {M. C.} and Y. Chao and A. Chen and P. Chen and Cheon, {B. G.} and R. Chistov and Cho, {I. S.} and K. Cho and Choi, {S. K.} and Y. Choi and J. Dalseno and M. Danilov and Z. Dole{\v z}al and D. Epifanov and V. Gaur and N. Gabyshev and A. Garmash and B. Golob and H. Ha and J. Haba and H. Hayashii and Y. Horii and Y. Hoshi and Hou, {W. S.} and Hsiung, {Y. B.} and Hyun, {H. J.} and T. Iijima and K. Inami and A. Ishikawa and R. Itoh and M. Iwabuchi and T. Iwashita and T. Julius and Kang, {J. H.} and P. Kapusta and T. Kawasaki and C. Kiesling and Kim, {H. J.} and Kim, {H. O.} and Kim, {M. J.} and Kim, {Y. J.} and K. Kinoshita and Ko, {B. R.} and P. Kri{\v z}an and R. Kumar and T. Kumita and Kwon, {Y. J.} and Kyeong, {S. H.} and Lee, {M. J.} and Lee, {S. H.} and J. Li and Y. Li and Lim, {C. L.} and C. Liu and D. Liventsev and R. Louvot and D. Matvienko and A. Matyja and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and R. Mizuk and Mohanty, {G. B.} and A. Moll and E. Nakano and H. Nakazawa and Z. Natkaniec and S. Nishida and O. Nitoh and T. Ohshima and S. Okuno and Olsen, {S. L.} and P. Pakhlov and G. Pakhlova and Park, {C. W.} and R. Pestotnik and M. Petri{\v c} and Piilonen, {L. E.} and A. Poluektov and M. R{\"o}hrken and S. Ryu and H. Sahoo and Y. Sakai and O. Schneider and C. Schwanda and K. Senyo and O. Seon and M. Shapkin and V. Shebalin and Shen, {C. P.} and Shiu, {J. G.} and B. Shwartz and F. Simon and P. Smerkol and Sohn, {Y. S.} and A. Sokolov and E. Solovieva and S. Stani{\v c} and M. Stari{\v c} and M. Sumihama and T. Sumiyoshi and S. Tanaka and Y. Teramoto and I. Tikhomirov and K. Trabelsi and M. Uchida and T. Uglov and Y. Unno and S. Uno and Y. Usov and G. Varner and Varvell, {K. E.} and A. Vossen and Wang, {C. H.} and P. Wang and M. Watanabe and Y. Watanabe and Williams, {K. M.} and E. Won and Yabsley, {B. D.} and Y. Yamashita and Yuan, {C. Z.} and Zhang, {Z. P.} and V. Zhilich and P. Zhou and V. Zhulanov and A. Zupanc and O. Zyukova",

note = "Funding Information: We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the National Institute of Informatics for valuable computing and SINET3 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan , the Japan Society for the Promotion of Science (JSPS) , and the Tau-Lepton Physics Research Center of Nagoya University ; the Australian Research Council and the Australian Department of Industry, Innovation, Science and Research ; the National Natural Science Foundation of China under contract Nos. 10575109 , 10775142 , 10875115 and 10825524 ; the Ministry of Education, Youth and Sports of the Czech Republic under contract Nos. LA10033 and MSM0021620859 ; the Department of Science and Technology of India ; the BK21 and WCU program of the Ministry Education Science and Technology, National Research Foundation of Korea , and NSDC of the Korea Institute of Science and Technology Information ; the Polish Ministry of Science and Higher Education ; the Ministry of Education and Science of the Russian Federation and the Russian Federal Agency for Atomic Energy ; the Slovenian Research Agency ; the Swiss National Science Foundation ; the National Science Council and the Ministry of Education of Taiwan ; and the US Department of Energy . This work is supported by a Grant-in-Aid from MEXT for Science Research in a Priority Area (“New Development of Flavor Physics”), and from JSPS for Creative Scientific Research (“Evolution of Tau-lepton Physics”). ",

year = "2011",

month = dec,

day = "6",

doi = "10.1016/j.physletb.2011.11.014",

language = "English",

volume = "706",

pages = "139--149",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "2-3",

}

TY - JOUR

T1 - Study of B ±→K ±(K SKπ) 0 decay and determination of η c and η c(2S) parameters

AU - Vinokurova, A.

AU - Kuzmin, A.

AU - Eidelman, S.

AU - Arinstein, K.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Barberio, E.

AU - Belous, K.

AU - Bhardwaj, V.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Brodzicka, J.

AU - Browder, T. E.

AU - Chang, M. C.

AU - Chao, Y.

AU - Chen, A.

AU - Chen, P.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Cho, I. S.

AU - Cho, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Dalseno, J.

AU - Danilov, M.

AU - Doležal, Z.

AU - Epifanov, D.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Golob, B.

AU - Ha, H.

AU - Haba, J.

AU - Hayashii, H.

AU - Horii, Y.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hsiung, Y. B.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Itoh, R.

AU - Iwabuchi, M.

AU - Iwashita, T.

AU - Julius, T.

AU - Kang, J. H.

AU - Kapusta, P.

AU - Kawasaki, T.

AU - Kiesling, C.

AU - Kim, H. J.

AU - Kim, H. O.

AU - Kim, M. J.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Ko, B. R.

AU - Križan, P.

AU - Kumar, R.

AU - Kumita, T.

AU - Kwon, Y. J.

AU - Kyeong, S. H.

AU - Lee, M. J.

AU - Lee, S. H.

AU - Li, J.

AU - Li, Y.

AU - Lim, C. L.

AU - Liu, C.

AU - Liventsev, D.

AU - Louvot, R.

AU - Matvienko, D.

AU - Matyja, A.

AU - McOnie, S.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Mohanty, G. B.

AU - Moll, A.

AU - Nakano, E.

AU - Nakazawa, H.

AU - Natkaniec, Z.

AU - Nishida, S.

AU - Nitoh, O.

AU - Ohshima, T.

AU - Okuno, S.

AU - Olsen, S. L.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Poluektov, A.

AU - Röhrken, M.

AU - Ryu, S.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Schwanda, C.

AU - Senyo, K.

AU - Seon, O.

AU - Shapkin, M.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shiu, J. G.

AU - Shwartz, B.

AU - Simon, F.

AU - Smerkol, P.

AU - Sohn, Y. S.

AU - Sokolov, A.

AU - Solovieva, E.

AU - Stanič, S.

AU - Starič, M.

AU - Sumihama, M.

AU - Sumiyoshi, T.

AU - Tanaka, S.

AU - Teramoto, Y.

AU - Tikhomirov, I.

AU - Trabelsi, K.

AU - Uchida, M.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Usov, Y.

AU - Varner, G.

AU - Varvell, K. E.

AU - Vossen, A.

AU - Wang, C. H.

AU - Wang, P.

AU - Watanabe, M.

AU - Watanabe, Y.

AU - Williams, K. M.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Yuan, C. Z.

AU - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhou, P.

AU - Zhulanov, V.

AU - Zupanc, A.

AU - Zyukova, O.

N1 - Funding Information: We thank the KEKB group for the excellent operation of the accelerator, the KEK cryogenics group for the efficient operation of the solenoid, and the KEK computer group and the National Institute of Informatics for valuable computing and SINET3 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan , the Japan Society for the Promotion of Science (JSPS) , and the Tau-Lepton Physics Research Center of Nagoya University ; the Australian Research Council and the Australian Department of Industry, Innovation, Science and Research ; the National Natural Science Foundation of China under contract Nos. 10575109 , 10775142 , 10875115 and 10825524 ; the Ministry of Education, Youth and Sports of the Czech Republic under contract Nos. LA10033 and MSM0021620859 ; the Department of Science and Technology of India ; the BK21 and WCU program of the Ministry Education Science and Technology, National Research Foundation of Korea , and NSDC of the Korea Institute of Science and Technology Information ; the Polish Ministry of Science and Higher Education ; the Ministry of Education and Science of the Russian Federation and the Russian Federal Agency for Atomic Energy ; the Slovenian Research Agency ; the Swiss National Science Foundation ; the National Science Council and the Ministry of Education of Taiwan ; and the US Department of Energy . This work is supported by a Grant-in-Aid from MEXT for Science Research in a Priority Area (“New Development of Flavor Physics”), and from JSPS for Creative Scientific Research (“Evolution of Tau-lepton Physics”).

PY - 2011/12/6

Y1 - 2011/12/6

N2 - We report the results of a study of B ±→K ±η c and B ±→K ±η c(2S) decays followed by η c and η c(2S) decays to (K SKπ) 0. The results are obtained from a data sample containing 535 million BB --meson pairs collected by the Belle experiment at the KEKB e +e - collider. We measure the products of the branching fractions B(B±→K±ηc)B(ηc→KSK±π∓)=(26.7±1.4(stat)-2.6+2.9(syst)±4.9(model))×10-6 and B(B±→K±ηc(2S))B(ηc(2S)→KSK±π∓)=(3.4-1.5+2.2(stat+model)-0.4+0.5(syst))×10-6. Interference with the non-resonant component leads to significant model uncertainty in the measurement of these product branching fractions. Our analysis accounts for this interference and allows the model uncertainty to be reduced. We also obtain the following charmonia masses and widths: M(ηc)=(2985.4±1.5(stat)-2.0+0.5(syst)) MeV/c2, Γ(ηc)=(35.1±3.1(stat)-1.6+1.0(syst)) MeV/c2, M(ηc(2S))=(3636.1-4.2+3.9(stat+model)-2.0+0.7(syst)) MeV/c2, Γ(ηc(2S))=(6.6-5.1+8.4(stat+model)-0.9+2.6(syst)) MeV/c2.

AB - We report the results of a study of B ±→K ±η c and B ±→K ±η c(2S) decays followed by η c and η c(2S) decays to (K SKπ) 0. The results are obtained from a data sample containing 535 million BB --meson pairs collected by the Belle experiment at the KEKB e +e - collider. We measure the products of the branching fractions B(B±→K±ηc)B(ηc→KSK±π∓)=(26.7±1.4(stat)-2.6+2.9(syst)±4.9(model))×10-6 and B(B±→K±ηc(2S))B(ηc(2S)→KSK±π∓)=(3.4-1.5+2.2(stat+model)-0.4+0.5(syst))×10-6. Interference with the non-resonant component leads to significant model uncertainty in the measurement of these product branching fractions. Our analysis accounts for this interference and allows the model uncertainty to be reduced. We also obtain the following charmonia masses and widths: M(ηc)=(2985.4±1.5(stat)-2.0+0.5(syst)) MeV/c2, Γ(ηc)=(35.1±3.1(stat)-1.6+1.0(syst)) MeV/c2, M(ηc(2S))=(3636.1-4.2+3.9(stat+model)-2.0+0.7(syst)) MeV/c2, Γ(ηc(2S))=(6.6-5.1+8.4(stat+model)-0.9+2.6(syst)) MeV/c2.

KW - B decay

KW - Etac

UR - http://www.scopus.com/inward/record.url?scp=84855204445&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2011.11.014

DO - 10.1016/j.physletb.2011.11.014

M3 - Article

AN - SCOPUS:84855204445

SN - 0370-2693

VL - 706

SP - 139

EP - 149

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3

ER -