Semileptonic decays Bc→(ηc,J/Ψ)lv in the perturbative QCD approach

WANG Wen-Fei; FAN Ying-Ying; XIAO Zhen-Jun

doi:10.1088/1674-1137/37/9/093102

Chinese Physics C> 2013, Vol. 37> Issue(9) : 093102 DOI: 10.1088/1674-1137/37/9/093102

Semileptonic decays B_c→(η_c,J/Ψ)lv in the perturbative QCD approach

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Abstract：
In this paper we study the semileptonic decays of B_c^-→(η_c,J/Ψ)l^-v_l. We first evaluate the B_c→(η_c,J/Ψ) transition form factors F₀(q²), F₊(q²), V(q²) and A_0,1,2(q²) by employing the pQCD factorization approach, and then we calculate the branching ratios for all considered semileptonic decays. Based on the numerical results and the phenomenological analysis, we find that: (a) the pQCD predictions for the values of the B_c→η_c and B_c→J/Ψ transition form factors agree well with those obtained by using other methods; (b) the pQCD predictions for the branching ratios of the considered decays are Br(B_c^-→η_c e^-v_e(μ^-v_μ)=(4.41_-1.09^+1.22)×10^-3, Br(B_c^-→η_cτ^-v_τ) =(1.37_-0.34^+0.37)×10^-3, Br(B_c^-→J/Ψ e^-v_e(μ^-v_μ)) =(10.03_-1.18^+1.33)×10^-3, and Br(B_c^-→J/Ψτ^-v_τ) =(2.92_-0.34^+0.40)×10^-3; and (c) we also define and calculate two ratios of the branching ratios R_{η_c} and R_J/Ψ, which will be tested by LHCb and the forthcoming Super-B experiments.

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[1]

Abe F et al. (CDF collaboration). Phys. Rev. D, 1998, 58: 112004[2] Gouz I P, Kiselev V V, Likhoded A K, Romanovsky V I, Yushchenko O P. Phys. At. Nucl., 2004, 67: 1559[3] Quarkonium Working Group, Brambilla N et al. Report No: CERN-2005-005; Altarelli M P, Teubert F. Int. J. Mod. Phys. A, 2008, 23: 5117[4] Dhir R, Verma R C. Phys. Rev. D, 2009, 79: 034004[5] Hernandez E, Nieves J, Verde-Velasco J M. Phys. Rev. D, 2006, 74: 074008[6] Ivanov M A, Korner J G, Santorelli P. Phys. Rev. D, 2005, 71: 094006; 2007, 75: 019901(E)[7] Ebert D, Faustov R N, Galkin V O. Phys. Rev. D, 2003, 68: 094020; Eur. Phys. J. C, 2003, 32: 29[8] SUN J F, YANG Y L, DU W J, MA H L. Phys. Rev. D, 2008, 77: 114004[9] WANG W, SHEN Y L, L C D. Phys. Rev. D, 2009, 79: 054012[10] QIAO C F, ZHU R L. Phys. Rev. D, 2013, 87: 014009[11] XIAO Z J, LIU X. Phys. Rev. D, 2011, 84: 074033; LIU X, XIAO Z J, L C D. Phys. Rev. D, 2010, 81: 014022[12] CHENG J F, DU D S, L C D. Eur. Phys. J. C, 2006, 45: 711[13] SUN J F, DU D S, YANG Y L. Eur. Phys. J. C, 2009, 60: 107[14] Yeh T W, LI H N. Phys. Rev. D, 1997, 56: 1615; LI H N, YU H L. Phys. Rev. Lett., 1995, 74: 4388; Phys. Lett. B, 1995, 353: 301; Phys. Rev. D, 1996, 53: 2480.[15] L C D, Ukai K, YANG M Z. Phys. Rev. D, 2001, 63: 074009[16] Kurimoto T, LI H N, Sanda A I. Phys. Rev. D, 2003, 67, 054028[17] LI Y, L C D. Phys. Rev. D, 2006, 73: 094006[18] LIU X, ZHANG Z Q, XIAO Z J. Chin. Phys. C, 2010, 34:937; Bondar A E, Chernyak V L. Phys. Lett. B, 2005, 612: 215[19] Kurimoto T, LI H N, Sanda A I. Phys. Rev. D, 2001, 65: 014007[20] WEI Z T, YANG M Z. pb, 2002, 642: 263; L C D, YANG M Z. Eur. Phys. J. C, 2002, 23: 275; Eur. Phys. J. C, 2003, 28: 515; LI R H, L C D, WANG W, WANG X X. Phys. Rev. D, 2009, 79: 014013; HUANG T, WU X G. Phys. Rev. D, 2005, 71: 034018[21] Wirbel M, Stech B, Bauerm. Z. Phys. C, 1985, 29: 637; Colangelo P, de Fazio F, Santorelli P, Scrimieri E. Phys. Lett. B, 1997, 395: 339[22] Beneke M, Feldmann T. pb, 2001, 592: 3[23] Buchalla G, Buras A J, Lautenbacher M E. Rev. Mod. Phys., 1996, 68: 1125[24] Colangelo P, de Fazio F, Ferrandes R, Pham T N. Phys. Rev. D, 2006, 73: 115006[25] LI H N, SHEN Y L, WANG Y M. Phys. Rev. D, 2012, 85: 074004[26] WANG W F, XIAO Z J. Phys. Rev. D, 2012, 86: 114025[27] CHEN C H, GENG C Q. JHEP, 2006, 10: 053; Ball P, Braun V M. Phys. Rev. D, 1997, 55: 5561[28] del Amo Sanchez P et al. (BABAR collaboration). Phys. Rev. D, 2011, 83: 032007[29] Beringer J et al. (Particle Data Group). Phys. Rev. D, 2012, 86: 010001[30] WANG Z G. arXiv:1209.1157v1[hep-ph]

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WANG Wen-Fei, FAN Ying-Ying and XIAO Zhen-Jun. Semileptonic decays B_c→(η_c,J/Ψ)lv in the perturbative QCD approach[J]. Chinese Physics C, 2013, 37(9): 093102. doi: 10.1088/1674-1137/37/9/093102

WANG Wen-Fei, FAN Ying-Ying and XIAO Zhen-Jun. Semileptonic decays B_c→(η_c,J/Ψ)lv in the perturbative QCD approach[J]. Chinese Physics C, 2013, 37(9): 093102. doi: 10.1088/1674-1137/37/9/093102 shu

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Received: 2012-12-14
Revised: 2013-01-22

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沈阳化工大学材料科学与工程学院沈阳 110142

Semileptonic decays B_c→(η_c,J/Ψ)lv in the perturbative QCD approach

Corresponding author: XIAO Zhen-Jun,

Received Date: 2012-12-14

Accepted Date: 2013-01-22

Available Online: 2013-09-05

Abstract: In this paper we study the semileptonic decays of B_c^-→(η_c,J/Ψ)l^-v_l. We first evaluate the B_c→(η_c,J/Ψ) transition form factors F₀(q²), F₊(q²), V(q²) and A_0,1,2(q²) by employing the pQCD factorization approach, and then we calculate the branching ratios for all considered semileptonic decays. Based on the numerical results and the phenomenological analysis, we find that: (a) the pQCD predictions for the values of the B_c→η_c and B_c→J/Ψ transition form factors agree well with those obtained by using other methods; (b) the pQCD predictions for the branching ratios of the considered decays are Br(B_c^-→η_c e^-v_e(μ^-v_μ)=(4.41_-1.09^+1.22)×10^-3, Br(B_c^-→η_cτ^-v_τ) =(1.37_-0.34^+0.37)×10^-3, Br(B_c^-→J/Ψ e^-v_e(μ^-v_μ)) =(10.03_-1.18^+1.33)×10^-3, and Br(B_c^-→J/Ψτ^-v_τ) =(2.92_-0.34^+0.40)×10^-3; and (c) we also define and calculate two ratios of the branching ratios R_{η_c} and R_J/Ψ, which will be tested by LHCb and the forthcoming Super-B experiments.

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Semileptonic decays B_c→(η_c,J/Ψ)lv in the perturbative QCD approach

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