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We choose a correlation function of chiral current to calculate the form factors f+Bπ(q2), f Bπ(q2) and the scalar form factor of f0(q2), thereby we can study the effect of leptonic mass on B0→π－l+ν l (l=e, μ, τ) decay. In this paper, we calculate the branching ratio of B0→π－l+ν l(l=e, μ, τ) decay for the first time, and find the leptonic mssses me and mμ may be ignored, but the heavy leptonic mass mτ may not be ignored and it can affect the branching ratio. The calculation results are consistent with the experimental data.
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Keywords:
- B semileptonic decay /
- form factor /
- branching ratio
[1] Wu X Y, Yin X G, Guo Y Q, Zhang X B, Yin J H, Xie Y L 2004 Acta Phys. Sin. 53 1015 (in Chinese) [吴向尧、尹新国、郭义庆、张晓波、尹建华、谢远亮 2004 物理学报 53 1015]
[2] Wu X Y, Gong P F, Su X Y, Liu X J, Fan X H, Wang L, Shi Z H, Guo Y Q 2006 Acta Phys. Sin. 55 3375 (in Chinese) [吴向尧、公丕锋、苏希玉、刘晓静、范希会、王 丽、石宗华、郭义庆 2006 物理学报 55 3375]
[3] Peng H A, Duan C G, Yan Z Y 2004 Acta Phys. Sin. 53 2478 (in Chinese) [彭宏安、段春贵、阎占元 2004 物理学报 53 2478]
[4] Wang Z G 2009 Chin. Phys. B 18 3802
[5] Shifman M A, Vainshtein A I, Zakharov V I 1979 Nucl. Phys. B 147 385
[6] Yang M Z 2006 Phys. Rev. D 73 034027
[7] Aubin C 2005 Phys. Rev. Lett. 94 011601
[8] Khodjamirian A, Ruckl R, Weinzierl S, Winhart C W, Yakovlev O 2000 Phys. Rev. D 62 114002
[9] Wu X Y, Yin X G, Guo Y Q 2004 Chin. Phys. 13 469
[10] Wang Z G, Wan S L, Wang K L 2001 Chin. Phys. 10 497
[11] Melikhov D, Stech B 2000 Phys. Rev. D 62 114002
[12] Azizi K, Sundu H, Bayar M, 2009 Phys. Rev. D 79 116001
[13] Aliev T M, Azizi K, Ozpineci A 2009 Phys. Rev. D 79 056005
[14] Fajfer S, Kamenik J 2005 Phys. Rev. D 71 014020
[15] Khodjamirian A, Ruckl R, Winhart C W 2000 Phys. Rev. D 58 054013
[16] Huang T, Li Z H, Wu X Y, 2001 Phys. Rev. D 63 094001
[17] Ball P, Zwicky R, 2005 Phys. Lett. B 625 225
[18] Amsler C, Particle Data Group 2008 Phys. Lett. B 667 1
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[1] Wu X Y, Yin X G, Guo Y Q, Zhang X B, Yin J H, Xie Y L 2004 Acta Phys. Sin. 53 1015 (in Chinese) [吴向尧、尹新国、郭义庆、张晓波、尹建华、谢远亮 2004 物理学报 53 1015]
[2] Wu X Y, Gong P F, Su X Y, Liu X J, Fan X H, Wang L, Shi Z H, Guo Y Q 2006 Acta Phys. Sin. 55 3375 (in Chinese) [吴向尧、公丕锋、苏希玉、刘晓静、范希会、王 丽、石宗华、郭义庆 2006 物理学报 55 3375]
[3] Peng H A, Duan C G, Yan Z Y 2004 Acta Phys. Sin. 53 2478 (in Chinese) [彭宏安、段春贵、阎占元 2004 物理学报 53 2478]
[4] Wang Z G 2009 Chin. Phys. B 18 3802
[5] Shifman M A, Vainshtein A I, Zakharov V I 1979 Nucl. Phys. B 147 385
[6] Yang M Z 2006 Phys. Rev. D 73 034027
[7] Aubin C 2005 Phys. Rev. Lett. 94 011601
[8] Khodjamirian A, Ruckl R, Weinzierl S, Winhart C W, Yakovlev O 2000 Phys. Rev. D 62 114002
[9] Wu X Y, Yin X G, Guo Y Q 2004 Chin. Phys. 13 469
[10] Wang Z G, Wan S L, Wang K L 2001 Chin. Phys. 10 497
[11] Melikhov D, Stech B 2000 Phys. Rev. D 62 114002
[12] Azizi K, Sundu H, Bayar M, 2009 Phys. Rev. D 79 116001
[13] Aliev T M, Azizi K, Ozpineci A 2009 Phys. Rev. D 79 056005
[14] Fajfer S, Kamenik J 2005 Phys. Rev. D 71 014020
[15] Khodjamirian A, Ruckl R, Winhart C W 2000 Phys. Rev. D 58 054013
[16] Huang T, Li Z H, Wu X Y, 2001 Phys. Rev. D 63 094001
[17] Ball P, Zwicky R, 2005 Phys. Lett. B 625 225
[18] Amsler C, Particle Data Group 2008 Phys. Lett. B 667 1
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