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 & 125 others 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, Ju Hwan 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, Youngjoon 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

Research output: Contribution to journalArticle

22 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 languageEnglish
Pages (from-to)139-149
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume706
Issue number2-3
DOIs
Publication statusPublished - 2011 Dec 6

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decay
interference
products
mesons

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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. ; Chen, P. ; Cheon, B. G. ; Chistov, R. ; Cho, I. S. ; Cho, K. ; Choi, S. K. ; 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, W. S. ; Hsiung, Y. B. ; Hyun, H. J. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Itoh, R. ; Iwabuchi, M. ; Iwashita, T. ; Julius, T. ; Kang, Ju Hwan ; Kapusta, P. ; Kawasaki, T. ; Kiesling, C. ; Kim, H. J. ; Kim, H. O. ; Kim, M. J. ; Kim, Y. J. ; Kinoshita, K. ; Ko, B. R. ; Križan, P. ; Kumar, R. ; Kumita, T. ; Kwon, Youngjoon ; Kyeong, S. H. ; Lee, M. J. ; Lee, S. H. ; Li, J. ; Li, Y. ; Lim, C. L. ; Liu, C. ; Liventsev, D. ; Louvot, R. ; Matvienko, D. ; Matyja, A. ; McOnie, S. ; Miyabayashi, K. ; Miyata, H. ; Miyazaki, Y. ; Mizuk, R. ; Mohanty, G. B. ; Moll, A. ; Nakano, E. ; Nakazawa, H. ; Natkaniec, Z. ; Nishida, S. ; Nitoh, O. ; Ohshima, T. ; Okuno, S. ; Olsen, S. L. ; Pakhlov, P. ; Pakhlova, G. ; Park, C. W. ; Pestotnik, R. ; Petrič, M. ; Piilonen, L. E. ; Poluektov, A. ; Röhrken, M. ; Ryu, S. ; Sahoo, H. ; Sakai, Y. ; Schneider, O. ; Schwanda, C. ; Senyo, K. ; Seon, O. ; Shapkin, M. ; Shebalin, V. ; Shen, C. P. ; Shiu, J. G. ; Shwartz, B. ; Simon, F. ; Smerkol, P. ; Sohn, Y. S. ; 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, K. E. ; Vossen, A. ; Wang, C. H. ; Wang, P. ; Watanabe, M. ; Watanabe, Y. ; Williams, K. M. ; Won, E. ; Yabsley, B. D. ; Yamashita, Y. ; Yuan, C. Z. ; Zhang, Z. P. ; Zhilich, V. ; Zhou, P. ; Zhulanov, V. ; Zupanc, A. ; Zyukova, O. / Study of B ±→K ±(K SKπ) 0 decay and determination of η c and η c(2S) parameters. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2011 ; Vol. 706, No. 2-3. pp. 139-149.
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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.",
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. Bračko 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. Doležal 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, {Ju Hwan} 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. Križan and R. Kumar and T. Kumita and Youngjoon Kwon 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. Petrič 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. Stanič and M. Starič 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",
year = "2011",
month = "12",
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",

}

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, Y, 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

Study of B ±→K ±(K SKπ) 0 decay and determination of η c and η c(2S) parameters. / 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.; Chen, P.; Cheon, B. G.; Chistov, R.; Cho, I. S.; Cho, K.; Choi, S. K.; 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, W. S.; Hsiung, Y. B.; Hyun, H. J.; Iijima, T.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwabuchi, M.; Iwashita, T.; Julius, T.; Kang, Ju Hwan; Kapusta, P.; Kawasaki, T.; Kiesling, C.; Kim, H. J.; Kim, H. O.; Kim, M. J.; Kim, Y. J.; Kinoshita, K.; Ko, B. R.; Križan, P.; Kumar, R.; Kumita, T.; Kwon, Youngjoon; Kyeong, S. H.; Lee, M. J.; Lee, S. H.; Li, J.; Li, Y.; Lim, C. L.; Liu, C.; Liventsev, D.; Louvot, R.; Matvienko, D.; Matyja, A.; McOnie, S.; Miyabayashi, K.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Mohanty, G. B.; Moll, A.; Nakano, E.; Nakazawa, H.; Natkaniec, Z.; Nishida, S.; Nitoh, O.; Ohshima, T.; Okuno, S.; Olsen, S. L.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Pestotnik, R.; Petrič, M.; Piilonen, L. E.; Poluektov, A.; Röhrken, M.; Ryu, S.; Sahoo, H.; Sakai, Y.; Schneider, O.; Schwanda, C.; Senyo, K.; Seon, O.; Shapkin, M.; Shebalin, V.; Shen, C. P.; Shiu, J. G.; Shwartz, B.; Simon, F.; Smerkol, P.; Sohn, Y. S.; 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, K. E.; Vossen, A.; Wang, C. H.; Wang, P.; Watanabe, M.; Watanabe, Y.; Williams, K. M.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Yuan, C. Z.; Zhang, Z. P.; Zhilich, V.; Zhou, P.; Zhulanov, V.; Zupanc, A.; Zyukova, O.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 706, No. 2-3, 06.12.2011, p. 139-149.

Research output: Contribution to journalArticle

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, Ju Hwan

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, Youngjoon

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.

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.

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

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

U2 - 10.1016/j.physletb.2011.11.014

DO - 10.1016/j.physletb.2011.11.014

M3 - Article

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

SN - 0370-2693

IS - 2-3

ER -