Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays

S. K. Choi; S. L. Olsen; I. Adachi; H. Aihara; V. Aulchenko; T. Aushev; T. Aziz; A. M. Bakich; V. Balagura; I. Bedny; U. Bitenc; A. Bondar; A. Bozek; M. Bračko; J. Brodzicka; T. E. Browder; P. Chang; Y. Chao; A. Chen; K. F. Chen; W. T. Chen; B. G. Cheon; R. Chistov; Y. Choi; J. Dalseno; M. Danilov; M. Dash; S. Eidelman; N. Gabyshev; B. Golob; J. Haba; T. Hara; K. Hayasaka; H. Hayashii; M. Hazumi; D. Heffernan; Y. Hoshi; W. S. Hou; H. J. Hyun; T. Iijima; K. Inami; A. Ishikawa; H. Ishino; R. Itoh; M. Iwasaki; Y. Iwasaki; D. H. Kah; J. H. Kang; N. Katayama; H. Kawai; T. Kawasaki; H. Kichimi; H. O. Kim; S. K. Kim; Y. J. Kim; K. Kinoshita; P. Križan; P. Krokovny; R. Kumar; C. C. Kuo; A. Kuzmin; Y. J. Kwon; J. S. Lange; J. S. Lee; M. J. Lee; S. E. Lee; T. Lesiak; A. Limosani; S. W. Lin; Y. Liu; D. Liventsev; F. Mandl; A. Matyja; S. McOnie; T. Medvedeva; W. Mitaroff; K. Miyabayashi; H. Miyake; H. Miyata; Y. Miyazaki; R. Mizuk; G. R. Moloney; E. Nakano; M. Nakao; S. Nishida; O. Nitoh; T. Nozaki; S. Ogawa; T. Ohshima; S. Okuno; H. Ozaki; P. Pakhlov; G. Pakhlova; C. W. Park; H. Park; L. S. Peak; R. Pestotnik; L. E. Piilonen; H. Sahoo; Y. Sakai; O. Schneider; A. J. Schwartz; K. Senyo; M. Shapkin; C. P. Shen; H. Shibuya; B. Shwartz; J. B. Singh; A. Somov; S. Stanič; M. Starič; T. Sumiyoshi; S. Y. Suzuki; F. Takasaki; K. Tamai; M. Tanaka; Y. Teramoto; I. Tikhomirov; S. Uehara; T. Uglov; Y. Unno; S. Uno; P. Urquijo; G. Varner; K. Vervink; S. Villa; C. H. Wang; M. Z. Wang; P. Wang; X. L. Wang; Y. Watanabe; R. Wedd; E. Won; B. D. Yabsley; Y. Yamashita; C. Z. Yuan; Z. P. Zhang; V. Zhulanov; A. Zupanc; O. Zyukova

doi:10.1103/PhysRevLett.100.142001

Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays

S. K. Choi, S. L. Olsen, I. Adachi, H. Aihara, V. Aulchenko, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, I. Bedny, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. F. ChenW. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, J. Dalseno, M. Danilov, M. Dash, S. Eidelman, N. Gabyshev, B. Golob, J. Haba, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, D. Heffernan, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lange, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, Y. Liu, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, B. Shwartz, J. B. Singh, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, S. Y. Suzuki, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, S. Villa, C. H. Wang, M. Z. Wang, P. Wang, X. L. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhulanov, A. Zupanc, O. Zyukova

Department of Physics

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

474 Citations (Scopus)

Abstract

A distinct peak is observed in the π±ψ′ invariant mass distribution near 4.43 GeV in B→Kπ±ψ′ decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433±4(stat)±2(syst)MeV and Γ=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B0→K Z±(4430))×B(Z±(4430)→π±ψ′)=(4. 1±1.0(stat)±1.4(syst))×10-5, where Z±(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605fb-1 data sample that contains 657×106 BB̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.

Original language	English
Article number	142001
Journal	Physical review letters
Volume	100
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.100.142001
Publication status	Published - 2008 Apr 8

ASJC Scopus subject areas

Physics and Astronomy(all)

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Choi, S. K., Olsen, S. L., Adachi, I., Aihara, H., Aulchenko, V., Aushev, T., Aziz, T., Bakich, A. M., Balagura, V., Bedny, I., Bitenc, U., Bondar, A., Bozek, A., Bračko, M., Brodzicka, J., Browder, T. E., Chang, P., Chao, Y., Chen, A., ... Zyukova, O. (2008). Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays. Physical review letters, 100(14), [142001]. https://doi.org/10.1103/PhysRevLett.100.142001

Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays. / Choi, S. K.; Olsen, S. L.; Adachi, I.; Aihara, H.; Aulchenko, V.; Aushev, T.; Aziz, T.; Bakich, A. M.; Balagura, V.; Bedny, I.; Bitenc, U.; Bondar, A.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T. E.; Chang, P.; Chao, Y.; Chen, A.; Chen, K. F.; Chen, W. T.; Cheon, B. G.; Chistov, R.; Choi, Y.; Dalseno, J.; Danilov, M.; Dash, M.; Eidelman, S.; Gabyshev, N.; Golob, B.; Haba, J.; Hara, T.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hoshi, Y.; Hou, W. S.; Hyun, H. J.; Iijima, T.; Inami, K.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kah, D. H.; Kang, J. H.; Katayama, N.; Kawai, H.; Kawasaki, T.; Kichimi, H.; Kim, H. O.; Kim, S. K.; Kim, Y. J.; Kinoshita, K.; Križan, P.; Krokovny, P.; Kumar, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Y. J.; Lange, J. S.; Lee, J. S.; Lee, M. J.; Lee, S. E.; Lesiak, T.; Limosani, A.; Lin, S. W.; Liu, Y.; Liventsev, D.; Mandl, F.; Matyja, A.; McOnie, S.; Medvedeva, T.; Mitaroff, W.; Miyabayashi, K.; Miyake, H.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Moloney, G. R.; Nakano, E.; Nakao, M.; Nishida, S.; Nitoh, O.; Nozaki, T.; Ogawa, S.; Ohshima, T.; Okuno, S.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; Park, C. W.; Park, H.; Peak, L. S.; Pestotnik, R.; Piilonen, L. E.; Sahoo, H.; Sakai, Y.; Schneider, O.; Schwartz, A. J.; Senyo, K.; Shapkin, M.; Shen, C. P.; Shibuya, H.; Shwartz, B.; Singh, J. B.; Somov, A.; Stanič, S.; Starič, M.; Sumiyoshi, T.; Suzuki, S. Y.; Takasaki, F.; Tamai, K.; Tanaka, M.; Teramoto, Y.; Tikhomirov, I.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Varner, G.; Vervink, K.; Villa, S.; Wang, C. H.; Wang, M. Z.; Wang, P.; Wang, X. L.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B. D.; Yamashita, Y.; Yuan, C. Z.; Zhang, Z. P.; Zhulanov, V.; Zupanc, A.; Zyukova, O.

In: Physical review letters, Vol. 100, No. 14, 142001, 08.04.2008.

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

Choi, SK, Olsen, SL, Adachi, I, Aihara, H, Aulchenko, V, Aushev, T, Aziz, T, Bakich, AM, Balagura, V, Bedny, I, Bitenc, U, Bondar, A, Bozek, A, Bračko, M, Brodzicka, J, Browder, TE, Chang, P, Chao, Y, Chen, A, Chen, KF, Chen, WT, Cheon, BG, Chistov, R, Choi, Y, Dalseno, J, Danilov, M, Dash, M, Eidelman, S, Gabyshev, N, Golob, B, Haba, J, Hara, T, Hayasaka, K, Hayashii, H, Hazumi, M, Heffernan, D, Hoshi, Y, Hou, WS, Hyun, HJ, Iijima, T, Inami, K, Ishikawa, A, Ishino, H, Itoh, R, Iwasaki, M, Iwasaki, Y, Kah, DH, Kang, JH, Katayama, N, Kawai, H, Kawasaki, T, Kichimi, H, Kim, HO, Kim, SK, Kim, YJ, Kinoshita, K, Križan, P, Krokovny, P, Kumar, R, Kuo, CC, Kuzmin, A, Kwon, YJ, Lange, JS, Lee, JS, Lee, MJ, Lee, SE, Lesiak, T, Limosani, A, Lin, SW, Liu, Y, Liventsev, D, Mandl, F, Matyja, A, McOnie, S, Medvedeva, T, Mitaroff, W, Miyabayashi, K, Miyake, H, Miyata, H, Miyazaki, Y, Mizuk, R, Moloney, GR, Nakano, E, Nakao, M, Nishida, S, Nitoh, O, Nozaki, T, Ogawa, S, Ohshima, T, Okuno, S, Ozaki, H, Pakhlov, P, Pakhlova, G, Park, CW, Park, H, Peak, LS, Pestotnik, R, Piilonen, LE, Sahoo, H, Sakai, Y, Schneider, O, Schwartz, AJ, Senyo, K, Shapkin, M, Shen, CP, Shibuya, H, Shwartz, B, Singh, JB, Somov, A, Stanič, S, Starič, M, Sumiyoshi, T, Suzuki, SY, Takasaki, F, Tamai, K, Tanaka, M, Teramoto, Y, Tikhomirov, I, Uehara, S, Uglov, T, Unno, Y, Uno, S, Urquijo, P, Varner, G, Vervink, K, Villa, S, Wang, CH, Wang, MZ, Wang, P, Wang, XL, Watanabe, Y, Wedd, R, Won, E, Yabsley, BD, Yamashita, Y, Yuan, CZ, Zhang, ZP, Zhulanov, V, Zupanc, A & Zyukova, O 2008, 'Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays', Physical review letters, vol. 100, no. 14, 142001. https://doi.org/10.1103/PhysRevLett.100.142001

Choi, S. K. ; Olsen, S. L. ; Adachi, I. ; Aihara, H. ; Aulchenko, V. ; Aushev, T. ; Aziz, T. ; Bakich, A. M. ; Balagura, V. ; Bedny, I. ; Bitenc, U. ; Bondar, A. ; Bozek, A. ; Bračko, M. ; Brodzicka, J. ; Browder, T. E. ; Chang, P. ; Chao, Y. ; Chen, A. ; Chen, K. F. ; Chen, W. T. ; Cheon, B. G. ; Chistov, R. ; Choi, Y. ; Dalseno, J. ; Danilov, M. ; Dash, M. ; Eidelman, S. ; Gabyshev, N. ; Golob, B. ; Haba, J. ; Hara, T. ; Hayasaka, K. ; Hayashii, H. ; Hazumi, M. ; Heffernan, D. ; Hoshi, Y. ; Hou, W. S. ; Hyun, H. J. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Ishino, H. ; Itoh, R. ; Iwasaki, M. ; Iwasaki, Y. ; Kah, D. H. ; Kang, J. H. ; Katayama, N. ; Kawai, H. ; Kawasaki, T. ; Kichimi, H. ; Kim, H. O. ; Kim, S. K. ; Kim, Y. J. ; Kinoshita, K. ; Križan, P. ; Krokovny, P. ; Kumar, R. ; Kuo, C. C. ; Kuzmin, A. ; Kwon, Y. J. ; Lange, J. S. ; Lee, J. S. ; Lee, M. J. ; Lee, S. E. ; Lesiak, T. ; Limosani, A. ; Lin, S. W. ; Liu, Y. ; Liventsev, D. ; Mandl, F. ; Matyja, A. ; McOnie, S. ; Medvedeva, T. ; Mitaroff, W. ; Miyabayashi, K. ; Miyake, H. ; Miyata, H. ; Miyazaki, Y. ; Mizuk, R. ; Moloney, G. R. ; Nakano, E. ; Nakao, M. ; Nishida, S. ; Nitoh, O. ; Nozaki, T. ; Ogawa, S. ; Ohshima, T. ; Okuno, S. ; Ozaki, H. ; Pakhlov, P. ; Pakhlova, G. ; Park, C. W. ; Park, H. ; Peak, L. S. ; Pestotnik, R. ; Piilonen, L. E. ; Sahoo, H. ; Sakai, Y. ; Schneider, O. ; Schwartz, A. J. ; Senyo, K. ; Shapkin, M. ; Shen, C. P. ; Shibuya, H. ; Shwartz, B. ; Singh, J. B. ; Somov, A. ; Stanič, S. ; Starič, M. ; Sumiyoshi, T. ; Suzuki, S. Y. ; Takasaki, F. ; Tamai, K. ; Tanaka, M. ; Teramoto, Y. ; Tikhomirov, I. ; Uehara, S. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Varner, G. ; Vervink, K. ; Villa, S. ; Wang, C. H. ; Wang, M. Z. ; Wang, P. ; Wang, X. L. ; Watanabe, Y. ; Wedd, R. ; Won, E. ; Yabsley, B. D. ; Yamashita, Y. ; Yuan, C. Z. ; Zhang, Z. P. ; Zhulanov, V. ; Zupanc, A. ; Zyukova, O. / Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays. In: Physical review letters. 2008 ; Vol. 100, No. 14.

@article{a6ec98805345462abae181589faff0bb,

title = "Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays",

abstract = "A distinct peak is observed in the π±ψ′ invariant mass distribution near 4.43 GeV in B→Kπ±ψ′ decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433±4(stat)±2(syst)MeV and Γ=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B0→K Z±(4430))×B(Z±(4430)→π±ψ′)=(4. 1±1.0(stat)±1.4(syst))×10-5, where Z±(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605fb-1 data sample that contains 657×106 B{\=B} pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.",

author = "Choi, {S. K.} and Olsen, {S. L.} and I. Adachi and H. Aihara and V. Aulchenko and T. Aushev and T. Aziz and Bakich, {A. M.} and V. Balagura and I. Bedny and U. Bitenc and A. Bondar and A. Bozek and M. Bra{\v c}ko and J. Brodzicka and Browder, {T. E.} and P. Chang and Y. Chao and A. Chen and Chen, {K. F.} and Chen, {W. T.} and Cheon, {B. G.} and R. Chistov and Y. Choi and J. Dalseno and M. Danilov and M. Dash and S. Eidelman and N. Gabyshev and B. Golob and J. Haba and T. Hara and K. Hayasaka and H. Hayashii and M. Hazumi and D. Heffernan and Y. Hoshi and Hou, {W. S.} and Hyun, {H. J.} and T. Iijima and K. Inami and A. Ishikawa and H. Ishino and R. Itoh and M. Iwasaki and Y. Iwasaki and Kah, {D. H.} and Kang, {J. H.} and N. Katayama and H. Kawai and T. Kawasaki and H. Kichimi and Kim, {H. O.} and Kim, {S. K.} and Kim, {Y. J.} and K. Kinoshita and P. Kri{\v z}an and P. Krokovny and R. Kumar and Kuo, {C. C.} and A. Kuzmin and Kwon, {Y. J.} and Lange, {J. S.} and Lee, {J. S.} and Lee, {M. J.} and Lee, {S. E.} and T. Lesiak and A. Limosani and Lin, {S. W.} and Y. Liu and D. Liventsev and F. Mandl and A. Matyja and S. McOnie and T. Medvedeva and W. Mitaroff and K. Miyabayashi and H. Miyake and H. Miyata and Y. Miyazaki and R. Mizuk and Moloney, {G. R.} and E. Nakano and M. Nakao and S. Nishida and O. Nitoh and T. Nozaki and S. Ogawa and T. Ohshima and S. Okuno and H. Ozaki and P. Pakhlov and G. Pakhlova and Park, {C. W.} and H. Park and Peak, {L. S.} and R. Pestotnik and Piilonen, {L. E.} and H. Sahoo and Y. Sakai and O. Schneider and Schwartz, {A. J.} and K. Senyo and M. Shapkin and Shen, {C. P.} and H. Shibuya and B. Shwartz and Singh, {J. B.} and A. Somov and S. Stani{\v c} and M. Stari{\v c} and T. Sumiyoshi and Suzuki, {S. Y.} and F. Takasaki and K. Tamai and M. Tanaka and Y. Teramoto and I. Tikhomirov and S. Uehara and T. Uglov and Y. Unno and S. Uno and P. Urquijo and G. Varner and K. Vervink and S. Villa and Wang, {C. H.} and Wang, {M. Z.} and P. Wang and Wang, {X. L.} and Y. Watanabe and R. Wedd and E. Won and Yabsley, {B. D.} and Y. Yamashita and Yuan, {C. Z.} and Zhang, {Z. P.} and V. Zhulanov and A. Zupanc and O. Zyukova",

year = "2008",

month = apr,

day = "8",

doi = "10.1103/PhysRevLett.100.142001",

language = "English",

volume = "100",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "14",

}

TY - JOUR

T1 - Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays

AU - Choi, S. K.

AU - Olsen, S. L.

AU - Adachi, I.

AU - Aihara, H.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Aziz, T.

AU - Bakich, A. M.

AU - Balagura, V.

AU - Bedny, I.

AU - Bitenc, U.

AU - Bondar, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Brodzicka, J.

AU - Browder, T. E.

AU - Chang, P.

AU - Chao, Y.

AU - Chen, A.

AU - Chen, K. F.

AU - Chen, W. T.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, Y.

AU - Dalseno, J.

AU - Danilov, M.

AU - Dash, M.

AU - Eidelman, S.

AU - Gabyshev, N.

AU - Golob, B.

AU - Haba, J.

AU - Hara, T.

AU - Hayasaka, K.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Heffernan, D.

AU - Hoshi, Y.

AU - Hou, W. S.

AU - Hyun, H. J.

AU - Iijima, T.

AU - Inami, K.

AU - Ishikawa, A.

AU - Ishino, H.

AU - Itoh, R.

AU - Iwasaki, M.

AU - Iwasaki, Y.

AU - Kah, D. H.

AU - Kang, J. H.

AU - Katayama, N.

AU - Kawai, H.

AU - Kawasaki, T.

AU - Kichimi, H.

AU - Kim, H. O.

AU - Kim, S. K.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Križan, P.

AU - Krokovny, P.

AU - Kumar, R.

AU - Kuo, C. C.

AU - Kuzmin, A.

AU - Kwon, Y. J.

AU - Lange, J. S.

AU - Lee, J. S.

AU - Lee, M. J.

AU - Lee, S. E.

AU - Lesiak, T.

AU - Limosani, A.

AU - Lin, S. W.

AU - Liu, Y.

AU - Liventsev, D.

AU - Mandl, F.

AU - Matyja, A.

AU - McOnie, S.

AU - Medvedeva, T.

AU - Mitaroff, W.

AU - Miyabayashi, K.

AU - Miyake, H.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mizuk, R.

AU - Moloney, G. R.

AU - Nakano, E.

AU - Nakao, M.

AU - Nishida, S.

AU - Nitoh, O.

AU - Nozaki, T.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Ozaki, H.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H.

AU - Peak, L. S.

AU - Pestotnik, R.

AU - Piilonen, L. E.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Schneider, O.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Shapkin, M.

AU - Shen, C. P.

AU - Shibuya, H.

AU - Shwartz, B.

AU - Singh, J. B.

AU - Somov, A.

AU - Stanič, S.

AU - Starič, M.

AU - Sumiyoshi, T.

AU - Suzuki, S. Y.

AU - Takasaki, F.

AU - Tamai, K.

AU - Tanaka, M.

AU - Teramoto, Y.

AU - Tikhomirov, I.

AU - Uehara, S.

AU - Uglov, T.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Varner, G.

AU - Vervink, K.

AU - Villa, S.

AU - Wang, C. H.

AU - Wang, M. Z.

AU - Wang, P.

AU - Wang, X. L.

AU - Watanabe, Y.

AU - Wedd, R.

AU - Won, E.

AU - Yabsley, B. D.

AU - Yamashita, Y.

AU - Yuan, C. Z.

AU - Zhang, Z. P.

AU - Zhulanov, V.

AU - Zupanc, A.

AU - Zyukova, O.

PY - 2008/4/8

Y1 - 2008/4/8

N2 - A distinct peak is observed in the π±ψ′ invariant mass distribution near 4.43 GeV in B→Kπ±ψ′ decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433±4(stat)±2(syst)MeV and Γ=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B0→K Z±(4430))×B(Z±(4430)→π±ψ′)=(4. 1±1.0(stat)±1.4(syst))×10-5, where Z±(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605fb-1 data sample that contains 657×106 BB̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.

AB - A distinct peak is observed in the π±ψ′ invariant mass distribution near 4.43 GeV in B→Kπ±ψ′ decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433±4(stat)±2(syst)MeV and Γ=45-13+18(stat)-13+30(syst) MeV. The product branching fraction is determined to be B(B0→K Z±(4430))×B(Z±(4430)→π±ψ′)=(4. 1±1.0(stat)±1.4(syst))×10-5, where Z±(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5σ. These results are obtained from a 605fb-1 data sample that contains 657×106 BB̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider.

UR - http://www.scopus.com/inward/record.url?scp=41949136413&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=41949136413&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.100.142001

DO - 10.1103/PhysRevLett.100.142001

M3 - Article

AN - SCOPUS:41949136413

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 14

M1 - 142001

ER -

Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays

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