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

Abstract
HTML
Reference
Related

PDF

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.

References

[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]

[1]	Kan Chen , Hong-Wei Ke , Xiang Liu , Takayuki Matsuki . Estimating the production rates of D -wave charmed mesons via the semileptonic decays of bottom mesons. Chinese Physics C, 2019, 43(2): 023106. doi: 10.1088/1674-1137/43/2/023106
[2]	Ai-Jun Ma , Ya Li , Wen-Fei Wang , Zhen-Jun Xiao . S-wave resonance contributions to B_(s)⁰→η_c(2S)π⁺π^-in the perturbative QCD factorization approach. Chinese Physics C, 2017, 41(8): 083105. doi: 10.1088/1674-1137/41/8/083105
[3]	ZHANG Zhi-Qing , FU Jian-Hua . Analysis of B→a₁(1260)(b₁(1235))K^* decays in the perturbative QCD approach. Chinese Physics C, 2015, 39(3): 033102. doi: 10.1088/1674-1137/39/3/033102
[4]	Farida Tahir , Azeem Mir , Shakeel Mahmood . Study of pure and semileptonic decays of D_s meson within R-parity violating supersymmetric model. Chinese Physics C, 2014, 38(12): 123101. doi: 10.1088/1674-1137/38/12/123101
[5]	JIANG Yue , WANG Guo-Li , WANG Tian-Hong , JU Wan-Li . Study of singlet-triplet mixing via semileptonic decays. Chinese Physics C, 2013, 37(1): 013101. doi: 10.1088/1674-1137/37/1/013101
[6]	ZOU Zhi-Tian , ZHOU Rui , LÜ Cai-Dian . Pure annihilation type decays B⁰→D_s^- K₂^*+ and B_s→Da₂ in perturbative QCD approach. Chinese Physics C, 2013, 37(1): 013103. doi: 10.1088/1674-1137/37/1/013103
[7]	ZOU Zhi-Tian , LI Cheng , LÜ Cai-Dian . Pure annihilation type D→PP(V) decays in the perturbative QCD approach. Chinese Physics C, 2013, 37(9): 093101. doi: 10.1088/1674-1137/37/9/093101
[8]	JIN Dan , YANG Ya-Dong . Space- and time-like kaon electromagnetic form factors in perturbative QCD. Chinese Physics C, 2012, 36(10): 941-946. doi: 10.1088/1674-1137/36/10/004
[9]	LI Jing-Wu , XUE Dan-Qing , XU Qing-Qiang , WU Xiang-Yao . D⁺ → η^(')l⁺ν_l semileptonic decays in light-cone sum rules. Chinese Physics C, 2011, 35(6): 519-524. doi: 10.1088/1674-1137/35/6/001
[10]	JIN Dan , YANG Ya-Dong . Radiative decays J/ψ → η^(')γ in perturbative QCD. Chinese Physics C, 2011, 35(8): 703-707. doi: 10.1088/1674-1137/35/8/001
[11]	LIU Xin , ZHANG Zhi-Qing , XIAO Zhen-Jun . B→K₀^*(1430) η^(′) decays in the pQCD approach. Chinese Physics C, 2010, 34(2): 157-164. doi: 10.1088/1674-1137/34/2/001
[12]	E. Hernandez , J. Nieves . Role of hyperfine mixing in b→c semileptonic decays of doubly-heavy baryons. Chinese Physics C, 2010, 34(9): 1488-1490. doi: 10.1088/1674-1137/34/9/080
[13]	LI Hai-Bo , YANG Mao-Zhi . Rare semileptonic decays of heavy mesons in the heavy quark limit. Chinese Physics C, 2010, 34(2): 262-266. doi: 10.1088/1674-1137/34/2/021
[14]	J.M. Flynn , E. Hernandez . Semileptonic bc to cc and bb to bc baryon decays and heavy quark spin symmetry. Chinese Physics C, 2010, 34(9): 1364-1367. doi: 10.1088/1674-1137/34/9/043
[15]	LIU Xin , ZHANG Zhi-Qing , XIAO Zhen-Jun . B→(J/ψ,η_c) K decays in the perturbative QCD approach. Chinese Physics C, 2010, 34(7): 937-943. doi: 10.1088/1674-1137/34/7/002
[16]	ZHANG Zhi-Qing , XIAO Zhen-Jun . B→f₀(980) (π,η^(′)) decays in the PQCD approach. Chinese Physics C, 2009, 33(7): 508-515. doi: 10.1088/1674-1137/33/7/002
[17]	ZHANG Zhi-Qing , LIU Xin , XIAO Zhen-Jun . B→πη^(′),η^(′)η^(′)decays and NLO contributions in the pQCD approach. Chinese Physics C, 2009, 33(9): 722-728. doi: 10.1088/1674-1137/33/9/003
[18]	ZHAO Shu-Min , ZHANG Yin-Jie , YAN Yu-Li , LIU Li-Quan , WU Li-Ping . Study of semileptonic decays B_s→D_s1(2536)lν and B_s→D_s2(2573) lν in the CQM model. Chinese Physics C, 2008, 32(8): 603-607. doi: 10.1088/1674-1137/32/8/002
[19]	LI Jing-Wu , YOU Fu-Yi . Perturbative QCD Study of B_(s)→φρ Decays. Chinese Physics C, 2007, 31(6): 523-531.
[20]	LI Ying , LU Cai-Dian . Calculation of Rare Decay B⁺→D⁺_sK^*0 in Perturbative QCD Approach. Chinese Physics C, 2003, 27(12): 1062-1066.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2134)
PDF Downloads(509)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.

HTML

Reference (1)

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

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article