Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays

J. Dalseno; I. Adachi; H. Aihara; D. M. Asner; V. Aulchenko; T. Aushev; A. M. Bakich; A. Bay; K. Belous; B. Bhuyan; A. Bozek; M. Bračko; O. Brovchenko; T. E. Browder; V. Chekelian; A. Chen; P. Chen; B. G. Cheon; K. Chilikin; R. Chistov; I. S. Cho; K. Cho; Y. Choi; Z. Doleal; Z. Drásal; S. Eidelman; J. E. Fast; V. Gaur; N. Gabyshev; A. Garmash; Y. M. Goh; 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; Y. Iwasaki; T. Iwashita; T. Julius; J. H. Kang; C. Kiesling; H. O. Kim; J. B. Kim; Y. J. Kim; K. Kinoshita; B. R. Ko; S. Koblitz; P. Kody; S. Korpar; P. Krian; P. Krokovny; B. Kronenbitter; T. Kuhr; T. Kumita; Y. J. Kwon; S. H. Lee; J. Li; J. Libby; C. Liu; Z. Q. Liu; R. Louvot; J. MacNaughton; D. Matvienko; S. McOnie; K. Miyabayashi; H. Miyata; Y. Miyazaki; G. B. Mohanty; D. Mohapatra; A. Moll; N. Muramatsu; M. Nakao; Z. Natkaniec; E. Nedelkovska; C. Ng; S. Nishida; K. Nishimura; O. Nitoh; S. Ogawa; T. Ohshima; S. Okuno; P. Pakhlov; G. Pakhlova; C. W. Park; H. K. Park; T. K. Pedlar; R. Pestotnik; M. Petrič; L. E. Piilonen; M. Prim; K. Prothmann; M. Ritter; M. Röhrken; H. Sahoo; Y. Sakai; T. Sanuki; O. Schneider; C. Schwanda; A. J. Schwartz; K. Senyo; O. Seon; M. E. Sevior; M. Shapkin; V. Shebalin; C. P. Shen; T. A. Shibata; J. G. Shiu; A. Sibidanov; F. Simon; P. Smerkol; Y. S. Sohn; E. Solovieva; M. Starič; M. Sumihama; T. Sumiyoshi; G. Tatishvili; Y. Teramoto; K. Trabelsi; M. Uchida; S. Uehara; Y. Unno; S. Uno; P. Urquijo; Y. Usov; P. Vanhoefer; G. Varner; C. H. Wang; P. Wang; M. Watanabe; Y. Watanabe; K. M. Williams; E. Won; B. D. Yabsley; Y. Yamashita; Z. P. Zhang; V. Zhilich; V. Zhulanov; A. Zupanc

doi:10.1103/PhysRevD.86.092012

Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays

J. Dalseno, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, A. M. Bakich, A. Bay, K. Belous, B. Bhuyan, A. Bozek, M. Bračko, O. Brovchenko, T. E. Browder, V. Chekelian, A. Chen, P. Chen, B. G. Cheon, K. Chilikin, R. ChistovI. S. Cho, K. Cho, Y. Choi, Z. Doleal, Z. Drásal, S. Eidelman, J. E. Fast, V. Gaur, N. Gabyshev, A. Garmash, Y. M. Goh, 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, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, C. Kiesling, H. O. Kim, J. B. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Koblitz, P. Kody, S. Korpar, P. Krian, P. Krokovny, B. Kronenbitter, T. Kuhr, T. Kumita, Y. J. Kwon, S. H. Lee, J. Li, J. Libby, C. Liu, Z. Q. Liu, R. Louvot, J. MacNaughton, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, D. Mohapatra, A. Moll, N. Muramatsu, M. Nakao, Z. Natkaniec, E. Nedelkovska, C. Ng, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, P. Pakhlov, G. Pakhlova, C. W. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Prim, K. Prothmann, M. Ritter, M. Röhrken, H. Sahoo, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, A. J. Schwartz, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. A. Shibata, J. G. Shiu, A. Sibidanov, F. Simon, P. Smerkol, Y. S. Sohn, E. Solovieva, M. Starič, M. Sumihama, T. Sumiyoshi, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, Y. Unno, S. Uno, P. Urquijo, Y. Usov, P. Vanhoefer, G. Varner, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, E. Won, B. D. Yabsley, Y. Yamashita, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

研究成果: Article › 査読

17 被引用数 (Scopus)

抄録

We present a measurement of the branching fraction and time-dependent CP violation parameters in B0→a1±(1260)π ^- decays. The results are obtained from the final data sample containing 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e ⁺e ^- collider. We obtain the product branching fraction B(B0→a1±(1260)π ^-) ×B(a1±(1260)→π ^±π ^-π ^±)=(11.1±1.0(stat)±1.4(syst))×10 ^-6 and an upper limit on the product branching fraction for a possible decay with the same final state B(B0→a2±(1320)π ^-)×B(a2±(1320)→π ^±π ^-π ^±)<2.2×10 ^-6at90%CL. In a time-dependent measurement to extract CP asymmetries, we obtain the CP violation parameters A _CP=-0.06±0.05(stat)±0.07(syst), C _CP=-0.01±0.11(stat)±0.09(syst), S _CP=-0. 51±0.14(stat)±0.08(syst), representing time- and flavor-integrated direct, flavor-dependent direct and mixing-induced CP violation, respectively. Simultaneously, we also extract the CP-conserving parameters ΔC=+0.54±0.11(stat)±0.07(syst), ΔS=-0.09±0. 14(stat)±0.06(syst), which, respectively, describe a rate difference and strong phase difference between the decay channels where the a1± does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B0→a1±(1260)π ^- decays with 3.1σ significance. The rate where the a1± does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1σ level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.

本文言語	English
論文番号	092012
ジャーナル	Physical Review D - Particles, Fields, Gravitation and Cosmology
巻	86
号	9
DOI	https://doi.org/10.1103/PhysRevD.86.092012
出版ステータス	Published - 2012 11月 26

ASJC Scopus subject areas

核物理学および高エネルギー物理学
物理学および天文学（その他）

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10.1103/PhysRevD.86.092012

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引用スタイル

Dalseno, J., Adachi, I., Aihara, H., Asner, D. M., Aulchenko, V., Aushev, T., Bakich, A. M., Bay, A., Belous, K., Bhuyan, B., Bozek, A., Bračko, M., Brovchenko, O., Browder, T. E., Chekelian, V., Chen, A., Chen, P., Cheon, B. G., Chilikin, K., ... Zupanc, A. (2012). Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 86(9), [092012]. https://doi.org/10.1103/PhysRevD.86.092012

Dalseno, J, Adachi, I, Aihara, H, Asner, DM, Aulchenko, V, Aushev, T, Bakich, AM, Bay, A, Belous, K, Bhuyan, B, Bozek, A, Bračko, M, Brovchenko, O, Browder, TE, Chekelian, V, Chen, A, Chen, P, Cheon, BG, Chilikin, K, Chistov, R, Cho, IS, Cho, K, Choi, Y, Doleal, Z, Drásal, Z, Eidelman, S, Fast, JE, Gaur, V, Gabyshev, N, Garmash, A, Goh, YM, Hayashii, H, Horii, Y, Hoshi, Y, Hou, WS, Hsiung, YB, Hyun, HJ, Iijima, T, Inami, K, Ishikawa, A, Itoh, R, Iwabuchi, M, Iwasaki, Y, Iwashita, T, Julius, T, Kang, JH, Kiesling, C, Kim, HO, Kim, JB, Kim, YJ, Kinoshita, K, Ko, BR, Koblitz, S, Kody, P, Korpar, S, Krian, P, Krokovny, P, Kronenbitter, B, Kuhr, T, Kumita, T, Kwon, YJ, Lee, SH, Li, J, Libby, J, Liu, C, Liu, ZQ, Louvot, R, MacNaughton, J, Matvienko, D, McOnie, S, Miyabayashi, K, Miyata, H, Miyazaki, Y, Mohanty, GB, Mohapatra, D, Moll, A, Muramatsu, N, Nakao, M, Natkaniec, Z, Nedelkovska, E, Ng, C, Nishida, S, Nishimura, K, Nitoh, O, Ogawa, S, Ohshima, T, Okuno, S, Pakhlov, P, Pakhlova, G, Park, CW, Park, HK, Pedlar, TK, Pestotnik, R, Petrič, M, Piilonen, LE, Prim, M, Prothmann, K, Ritter, M, Röhrken, M, Sahoo, H, Sakai, Y, Sanuki, T, Schneider, O, Schwanda, C, Schwartz, AJ, Senyo, K, Seon, O, Sevior, ME, Shapkin, M, Shebalin, V, Shen, CP, Shibata, TA, Shiu, JG, Sibidanov, A, Simon, F, Smerkol, P, Sohn, YS, Solovieva, E, Starič, M, Sumihama, M, Sumiyoshi, T, Tatishvili, G, Teramoto, Y, Trabelsi, K, Uchida, M, Uehara, S, Unno, Y, Uno, S, Urquijo, P, Usov, Y, Vanhoefer, P, Varner, G, Wang, CH, Wang, P, Watanabe, M, Watanabe, Y, Williams, KM, Won, E, Yabsley, BD, Yamashita, Y, Zhang, ZP, Zhilich, V, Zhulanov, V & Zupanc, A 2012, 'Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 86, no. 9, 092012. https://doi.org/10.1103/PhysRevD.86.092012

@article{bd8238f0efb3443fa531f6a4591df795,

title = "Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays",

abstract = "We present a measurement of the branching fraction and time-dependent CP violation parameters in B0→a1±(1260)π - decays. The results are obtained from the final data sample containing 772×106 B{\=B} pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We obtain the product branching fraction B(B0→a1±(1260)π -) ×B(a1±(1260)→π ±π -π ±)=(11.1±1.0(stat)±1.4(syst))×10 -6 and an upper limit on the product branching fraction for a possible decay with the same final state B(B0→a2±(1320)π -)×B(a2±(1320)→π ±π -π ±)<2.2×10 -6at90%CL. In a time-dependent measurement to extract CP asymmetries, we obtain the CP violation parameters A CP=-0.06±0.05(stat)±0.07(syst), C CP=-0.01±0.11(stat)±0.09(syst), S CP=-0. 51±0.14(stat)±0.08(syst), representing time- and flavor-integrated direct, flavor-dependent direct and mixing-induced CP violation, respectively. Simultaneously, we also extract the CP-conserving parameters ΔC=+0.54±0.11(stat)±0.07(syst), ΔS=-0.09±0. 14(stat)±0.06(syst), which, respectively, describe a rate difference and strong phase difference between the decay channels where the a1± does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B0→a1±(1260)π - decays with 3.1σ significance. The rate where the a1± does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1σ level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.",

author = "J. Dalseno and I. Adachi and H. Aihara and Asner, {D. M.} and V. Aulchenko and T. Aushev and Bakich, {A. M.} and A. Bay and K. Belous and B. Bhuyan and A. Bozek and M. Bra{\v c}ko and O. Brovchenko and Browder, {T. E.} and V. Chekelian and A. Chen and P. Chen and Cheon, {B. G.} and K. Chilikin and R. Chistov and Cho, {I. S.} and K. Cho and Y. Choi and Z. Doleal and Z. Dr{\'a}sal and S. Eidelman and Fast, {J. E.} and V. Gaur and N. Gabyshev and A. Garmash and Goh, {Y. M.} 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 Y. Iwasaki and T. Iwashita and T. Julius and Kang, {J. H.} and C. Kiesling and Kim, {H. O.} and Kim, {J. B.} and Kim, {Y. J.} and K. Kinoshita and Ko, {B. R.} and S. Koblitz and P. Kody and S. Korpar and P. Krian and P. Krokovny and B. Kronenbitter and T. Kuhr and T. Kumita and Kwon, {Y. J.} and Lee, {S. H.} and J. Li and J. Libby and C. Liu and Liu, {Z. Q.} and R. Louvot and J. MacNaughton and D. Matvienko and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and Mohanty, {G. B.} and D. Mohapatra and A. Moll and N. Muramatsu and M. Nakao and Z. Natkaniec and E. Nedelkovska and C. Ng and S. Nishida and K. Nishimura and O. Nitoh and S. Ogawa and T. Ohshima and S. Okuno and P. Pakhlov and G. Pakhlova and Park, {C. W.} and Park, {H. K.} and Pedlar, {T. K.} and R. Pestotnik and M. Petri{\v c} and Piilonen, {L. E.} and M. Prim and K. Prothmann and M. Ritter and M. R{\"o}hrken and H. Sahoo and Y. Sakai and T. Sanuki and O. Schneider and C. Schwanda and Schwartz, {A. J.} and K. Senyo and O. Seon and Sevior, {M. E.} and M. Shapkin and V. Shebalin and Shen, {C. P.} and Shibata, {T. A.} and Shiu, {J. G.} and A. Sibidanov and F. Simon and P. Smerkol and Sohn, {Y. S.} and E. Solovieva and M. Stari{\v c} and M. Sumihama and T. Sumiyoshi and G. Tatishvili and Y. Teramoto and K. Trabelsi and M. Uchida and S. Uehara and Y. Unno and S. Uno and P. Urquijo and Y. Usov and P. Vanhoefer and G. Varner 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 Zhang, {Z. P.} and V. Zhilich and V. Zhulanov and A. Zupanc",

year = "2012",

month = nov,

day = "26",

doi = "10.1103/PhysRevD.86.092012",

language = "English",

volume = "86",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "9",

}

TY - JOUR

T1 - Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays

AU - Dalseno, J.

AU - Adachi, I.

AU - Aihara, H.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Bay, A.

AU - Belous, K.

AU - Bhuyan, B.

AU - Bozek, A.

AU - Bračko, M.

AU - Brovchenko, O.

AU - Browder, T. E.

AU - Chekelian, V.

AU - Chen, A.

AU - Chen, P.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Chistov, R.

AU - Cho, I. S.

AU - Cho, K.

AU - Choi, Y.

AU - Doleal, Z.

AU - Drásal, Z.

AU - Eidelman, S.

AU - Fast, J. E.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Goh, Y. M.

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 - Iwasaki, Y.

AU - Iwashita, T.

AU - Julius, T.

AU - Kang, J. H.

AU - Kiesling, C.

AU - Kim, H. O.

AU - Kim, J. B.

AU - Kim, Y. J.

AU - Kinoshita, K.

AU - Ko, B. R.

AU - Koblitz, S.

AU - Kody, P.

AU - Korpar, S.

AU - Krian, P.

AU - Krokovny, P.

AU - Kronenbitter, B.

AU - Kuhr, T.

AU - Kumita, T.

AU - Kwon, Y. J.

AU - Lee, S. H.

AU - Li, J.

AU - Libby, J.

AU - Liu, C.

AU - Liu, Z. Q.

AU - Louvot, R.

AU - MacNaughton, J.

AU - Matvienko, D.

AU - McOnie, S.

AU - Miyabayashi, K.

AU - Miyata, H.

AU - Miyazaki, Y.

AU - Mohanty, G. B.

AU - Mohapatra, D.

AU - Moll, A.

AU - Muramatsu, N.

AU - Nakao, M.

AU - Natkaniec, Z.

AU - Nedelkovska, E.

AU - Ng, C.

AU - Nishida, S.

AU - Nishimura, K.

AU - Nitoh, O.

AU - Ogawa, S.

AU - Ohshima, T.

AU - Okuno, S.

AU - Pakhlov, P.

AU - Pakhlova, G.

AU - Park, C. W.

AU - Park, H. K.

AU - Pedlar, T. K.

AU - Pestotnik, R.

AU - Petrič, M.

AU - Piilonen, L. E.

AU - Prim, M.

AU - Prothmann, K.

AU - Ritter, M.

AU - Röhrken, M.

AU - Sahoo, H.

AU - Sakai, Y.

AU - Sanuki, T.

AU - Schneider, O.

AU - Schwanda, C.

AU - Schwartz, A. J.

AU - Senyo, K.

AU - Seon, O.

AU - Sevior, M. E.

AU - Shapkin, M.

AU - Shebalin, V.

AU - Shen, C. P.

AU - Shibata, T. A.

AU - Shiu, J. G.

AU - Sibidanov, A.

AU - Simon, F.

AU - Smerkol, P.

AU - Sohn, Y. S.

AU - Solovieva, E.

AU - Starič, M.

AU - Sumihama, M.

AU - Sumiyoshi, T.

AU - Tatishvili, G.

AU - Teramoto, Y.

AU - Trabelsi, K.

AU - Uchida, M.

AU - Uehara, S.

AU - Unno, Y.

AU - Uno, S.

AU - Urquijo, P.

AU - Usov, Y.

AU - Vanhoefer, P.

AU - Varner, G.

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 - Zhang, Z. P.

AU - Zhilich, V.

AU - Zhulanov, V.

AU - Zupanc, A.

PY - 2012/11/26

Y1 - 2012/11/26

N2 - We present a measurement of the branching fraction and time-dependent CP violation parameters in B0→a1±(1260)π - decays. The results are obtained from the final data sample containing 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We obtain the product branching fraction B(B0→a1±(1260)π -) ×B(a1±(1260)→π ±π -π ±)=(11.1±1.0(stat)±1.4(syst))×10 -6 and an upper limit on the product branching fraction for a possible decay with the same final state B(B0→a2±(1320)π -)×B(a2±(1320)→π ±π -π ±)<2.2×10 -6at90%CL. In a time-dependent measurement to extract CP asymmetries, we obtain the CP violation parameters A CP=-0.06±0.05(stat)±0.07(syst), C CP=-0.01±0.11(stat)±0.09(syst), S CP=-0. 51±0.14(stat)±0.08(syst), representing time- and flavor-integrated direct, flavor-dependent direct and mixing-induced CP violation, respectively. Simultaneously, we also extract the CP-conserving parameters ΔC=+0.54±0.11(stat)±0.07(syst), ΔS=-0.09±0. 14(stat)±0.06(syst), which, respectively, describe a rate difference and strong phase difference between the decay channels where the a1± does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B0→a1±(1260)π - decays with 3.1σ significance. The rate where the a1± does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1σ level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.

AB - We present a measurement of the branching fraction and time-dependent CP violation parameters in B0→a1±(1260)π - decays. The results are obtained from the final data sample containing 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We obtain the product branching fraction B(B0→a1±(1260)π -) ×B(a1±(1260)→π ±π -π ±)=(11.1±1.0(stat)±1.4(syst))×10 -6 and an upper limit on the product branching fraction for a possible decay with the same final state B(B0→a2±(1320)π -)×B(a2±(1320)→π ±π -π ±)<2.2×10 -6at90%CL. In a time-dependent measurement to extract CP asymmetries, we obtain the CP violation parameters A CP=-0.06±0.05(stat)±0.07(syst), C CP=-0.01±0.11(stat)±0.09(syst), S CP=-0. 51±0.14(stat)±0.08(syst), representing time- and flavor-integrated direct, flavor-dependent direct and mixing-induced CP violation, respectively. Simultaneously, we also extract the CP-conserving parameters ΔC=+0.54±0.11(stat)±0.07(syst), ΔS=-0.09±0. 14(stat)±0.06(syst), which, respectively, describe a rate difference and strong phase difference between the decay channels where the a1± does not contain the spectator quark and those where it does. We find first evidence of mixing-induced CP violation in B0→a1±(1260)π - decays with 3.1σ significance. The rate where the a1± does not contain the spectator quark from the B meson is found to dominate the rate where it does at the 4.1σ level. However, there is no evidence for either time- and flavor-integrated direct CP violation or flavor-dependent direct CP violation.

UR - http://www.scopus.com/inward/record.url?scp=84870233708&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84870233708&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.86.092012

DO - 10.1103/PhysRevD.86.092012

M3 - Article

AN - SCOPUS:84870233708

SN - 1550-7998

VL - 86

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 9

M1 - 092012

ER -

Measurement of branching fraction and first evidence of CP violation in B0→a1±(1260)π- Decays

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