Skip to main content
SpringerLink
Log in

Sensitivity to charged scalars in B → D (*) τν τ and B → τν τ decays

  • Published:
Journal of High Energy Physics Aims and scope Submit manuscript

Abstract

We analyze the recent experimental evidence for an excess of τ -lepton production in several exclusive semileptonic B-meson decays in the context of two-Higgs-doublet models. These decay modes are sensitive to the exchange of charged scalars and constrain strongly their Yukawa interactions. While the usual Type-II scenario cannot accommodate the recent BaBar data, this is possible within more general models in which the charged-scalar couplings to up-type quarks are not as suppressed. Both the B → D (*) τν τ and the B → τν τ data can be fitted within the framework of the Aligned Two-Higgs-Doublet Model, but the resulting parameter ranges are in conflict with the constraints from leptonic charm decays. This could indicate a departure from the family universality of the Yukawa couplings, beyond their characteristic fermion mass dependence. We discuss several new observables that are sensitive to a hypothetical charged-scalar contribution, demonstrating that they are well suited to distinguish between different scenarios of new physics in the scalar sector, and also between this group and models with different Dirac structures; their experimental study would therefore shed light on the relevance of scalar exchanges in semileptonic \( b\to c{\tau^{-}}{{\overline{\nu}}_{\tau }} \) transitions.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. BaBar collaboration, J. Lees et al., Evidence for an excess of \( \overline{B}\to {D^{(*) }}{\tau^{-}}{{\overline{\nu}}_{\tau }} \) decays, Phys. Rev. Lett. 109 (2012) 101802 [arXiv:1205.5442] [INSPIRE].

    Article  ADS  Google Scholar 

  2. Belle collaboration, I. Adachi et al., Measurement of B → D (∗) τν using full reconstruction tags, arXiv:0910.4301 [INSPIRE].

  3. Belle collaboration, A. Bozek et al., Observation of \( {B^{+}}\to {{\overline{D}}^0}{\tau^{+}}{\nu_{\tau }} \) and Evidence for \( {B^{+}}\to {{\overline{D}}^0}{\tau^{+}}{\nu_{\tau }} \) at Belle, Phys. Rev. D 82 (2010) 072005 [arXiv:1005.2302] [INSPIRE].

    ADS  Google Scholar 

  4. S. Fajfer, J.F. Kamenik, I. Nisandzic and J. Zupan, Implications of Lepton Flavor Universality Violations in B Decays, Phys. Rev. Lett. 109 (2012) 161801 [arXiv:1206.1872] [INSPIRE].

    Article  ADS  Google Scholar 

  5. S. Fajfer, J.F. Kamenik and I. Nisandzic, On the \( B\to {D^{*}}\tau {{\overline{\nu}}_{\tau }} \) Sensitivity to New Physics, Phys. Rev. D 85 (2012) 094025 [INSPIRE].

    ADS  Google Scholar 

  6. Y. Sakaki and H. Tanaka, Constraints of the Charged Scalar Effects Using the Forward-Backward Asymmetry on \( B\to {D^{{\left( * \right)}}}\tau {{\overline{\nu}}_{\tau }} \), arXiv:1205.4908 [INSPIRE].

  7. D. Becirevic, N. Kosnik and A. Tayduganov, \( \overline{B}\to D\tau {{\overline{\nu}}_{\tau }} \) vs. \( \overline{B}\to D\mu {{\overline{\nu}}_{\mu }} \), Phys. Lett. B 716 (2012) 208 [arXiv:1206.4977] [INSPIRE].

    ADS  Google Scholar 

  8. BaBar collaboration, B. Aubert et al., A Search for B + → ℓ + ν ℓ Recoiling Against \( {B^{-}}\to {D^0}{\ell^{-}}\overline{\nu}X \), Phys. Rev. D 81 (2010) 051101 [arXiv:0912.2453] [INSPIRE].

    ADS  Google Scholar 

  9. BaBar collaboration, J. Lees et al., Evidence of B → τν decays with hadronic B tags, arXiv:1207.0698 [INSPIRE].

  10. Belle collaboration, K. Hara et al., Evidence for \( {B^{-}}\to {\tau^{-}}\overline{\nu} \) with a Semileptonic Tagging Method, Phys. Rev. D 82 (2010) 071101 [arXiv:1006.4201] [INSPIRE].

    ADS  Google Scholar 

  11. Particle Data Group collaboration, J. Beringer et al., Review of Particle Physics (RPP), Phys. Rev. D 86 (2012) 010001 [INSPIRE].

    ADS  Google Scholar 

  12. CKMfitter Group collaboration, J. Charles et al., CP violation and the CKM matrix: Assessing the impact of the asymmetric B factories, Eur. Phys. J. C 41 (2005) 1 [hep-ph/0406184] [INSPIRE].

    Article  ADS  Google Scholar 

  13. N. Cabibbo, Unitary Symmetry and Leptonic Decays, Phys. Rev. Lett. 10 (1963) 531 [INSPIRE].

    Article  ADS  Google Scholar 

  14. M. Kobayashi and T. Maskawa, CP Violation in the Renormalizable Theory of Weak Interaction, Prog. Theor. Phys. 49 (1973) 652 [INSPIRE].

    Article  ADS  Google Scholar 

  15. Belle collaboration, I. Adachi et al., Measurement of \( {B^{-}}\to {\tau^{-}}{{\overline{\nu}}_{\tau }} \) with a Hadronic Tagging Method Using the Full Data Sample of Belle, arXiv:1208.4678 [INSPIRE].

  16. A. Crivellin, C. Greub and A. Kokulu, Explaining B → Dτν, B → D ∗ τν and B → τν in a 2HDM of type-III, Phys. Rev. D 86 (2012) 054014 [arXiv:1206.2634] [INSPIRE].

    ADS  Google Scholar 

  17. A. Datta, M. Duraisamy and D. Ghosh, Diagnosing New Physics in b → c τ ν τ decays in the light of the recent BaBar result, Phys. Rev. D 86 (2012) 034027 [arXiv:1206.3760] [INSPIRE].

    ADS  Google Scholar 

  18. J.A. Bailey et al., Refining new-physics searches in B → Dτν decay with lattice QCD, Phys. Rev. Lett. 109 (2012) 071802 [arXiv:1206.4992] [INSPIRE].

    Article  ADS  Google Scholar 

  19. R. Faustov and V. Galkin, Exclusive weak B decays involving τ lepton in the relativistic quark model, Mod. Phys. Lett. A 27 (2012) 1250183 [arXiv:1207.5973] [INSPIRE].

    ADS  Google Scholar 

  20. N. Deshpande and A. Menon, Hints of R-parity violation in B decays into τν, arXiv:1208.4134 [INSPIRE].

  21. D. Choudhury, D.K. Ghosh and A. Kundu, B decay anomalies in an effective theory, arXiv:1210.5076 [INSPIRE].

  22. G. Branco, P. Ferreira, L. Lavoura, M. Rebelo, M. Sher and J.P. Silva, Theory and phenomenology of two-Higgs-doublet models, Phys. Rept. 516 (2012) 1 [arXiv:1106.0034] [INSPIRE].

    Article  ADS  Google Scholar 

  23. J.F. Gunion, H.E. Haber, G.L. Kane and S. Dawson, The Higgs Hunter’s Guide, Front. Phys. 80 (2000) 1.

    Google Scholar 

  24. A. Pich and P. Tuzon, Yukawa Alignment in the Two-Higgs-Doublet Model, Phys. Rev. D 80 (2009) 091702 [arXiv:0908.1554] [INSPIRE].

    ADS  Google Scholar 

  25. X.-G. He and G. Valencia, B decays with τ -leptons in non-universal left-right models, arXiv:1211.0348 [INSPIRE].

  26. A. Pich, Flavour constraints on multi-Higgs-doublet models: Yukawa alignment, Nucl. Phys. Proc. Suppl. 209 (2010) 182 [arXiv:1010.5217] [INSPIRE].

    Article  ADS  Google Scholar 

  27. M. Jung, A. Pich and P. Tuzon, Charged-Higgs phenomenology in the Aligned two-Higgs-doublet model, JHEP 11 (2010) 003 [arXiv:1006.0470] [INSPIRE].

    Article  ADS  Google Scholar 

  28. M. Jung, A. Pich and P. Tuzon, The B → X s γ Rate and CP Asymmetry within the Aligned Two-Higgs-Doublet Model, Phys. Rev. D 83 (2011) 074011 [arXiv:1011.5154] [INSPIRE].

    ADS  Google Scholar 

  29. M. Jung, X.-Q. Li and A. Pich, Exclusive radiative B-meson decays within the aligned two-Higgs-doublet model, JHEP 10 (2012) 063 [arXiv:1208.1251] [INSPIRE].

    Article  ADS  Google Scholar 

  30. W.-S. Hou, Enhanced charged Higgs boson effects in \( {B^{-}}\to \tau \overline{\nu} \) , \( \mu \overline{\nu} \) and \( b\to \tau \overline{\nu}+X \), Phys. Rev. D 48 (1993) 2342 [INSPIRE].

    ADS  Google Scholar 

  31. J.F. Kamenik and F. Mescia, B → Dτν Branching Ratios: Opportunity for Lattice QCD and Hadron Colliders, Phys. Rev. D 78 (2008) 014003 [arXiv:0802.3790] [INSPIRE].

    ADS  Google Scholar 

  32. O. Deschamps, S. Descotes-Genon, S. Monteil, V. Niess, S. T’Jampens and V. Tisserand, The Two Higgs Doublet of Type II facing flavour physics data, Phys. Rev. D 82 (2010) 073012 [arXiv:0907.5135] [INSPIRE].

    ADS  Google Scholar 

  33. G. de Divitiis, R. Petronzio and N. Tantalo, Quenched lattice calculation of semileptonic heavy-light meson form factors, JHEP 10 (2007) 062 [arXiv:0707.0587] [INSPIRE].

    Article  ADS  Google Scholar 

  34. K. Azizi, QCD Sum Rules Study of the Semileptonic B s (B ±)(B 0) → D − s[1968](D 0)(D ±)ℓν Decays, Nucl. Phys. B 801 (2008) 70 [arXiv:0805.2802] [INSPIRE].

    Article  ADS  Google Scholar 

  35. S. Faller, A. Khodjamirian, C. Klein and T. Mannel, B → D (∗) Form Factors from QCD Light-Cone Sum Rules, Eur. Phys. J. C 60 (2009) 603 [arXiv:0809.0222] [INSPIRE].

    Article  ADS  Google Scholar 

  36. J. Korner and G. Schuler, Exclusive Semileptonic Heavy Meson Decays Including Lepton Mass Effects, Z. Phys. C 46 (1990) 93 [INSPIRE].

    ADS  Google Scholar 

  37. J. Korner and G. Schuler, Exclusive Semileptonic Decays of Bottom Mesons in the Spectator Quark Model, Z. Phys. C 38 (1988) 511 [Erratum ibid. C 41 (1989) 690] [INSPIRE].

  38. K. Hagiwara, A.D. Martin and M. Wade, Helicity amplitude analysis of B → D ∗ lepton neutrino decays, Phys. Lett. B 228 (1989) 144 [INSPIRE].

    ADS  Google Scholar 

  39. K. Hagiwara, A.D. Martin and M. Wade, Exclusive semileptonic B meson decays, Nucl. Phys. B 327 (1989) 569 [INSPIRE].

    Article  ADS  Google Scholar 

  40. A.F. Falk and M. Neubert, Second order power corrections in the heavy quark effective theory. 1. Formalism and meson form-factors, Phys. Rev. D 47 (1993) 2965 [hep-ph/9209268] [INSPIRE].

    ADS  Google Scholar 

  41. A.F. Falk and M. Neubert, Second order power corrections in the heavy quark effective theory. 2. Baryon form-factors, Phys. Rev. D 47 (1993) 2982 [hep-ph/9209269] [INSPIRE].

    ADS  Google Scholar 

  42. M. Neubert, Short distance expansion of heavy quark currents, Phys. Rev. D 46 (1992) 2212 [INSPIRE].

    ADS  Google Scholar 

  43. T. Hermann, M. Misiak and M. Steinhauser, \( \overline{B}\to {X_s}\gamma \) in the Two Higgs Doublet Model up to Next-to-Next-to-Leading Order in QCD, JHEP 11 (2012) 036 [arXiv:1208.2788] [INSPIRE].

    Article  ADS  Google Scholar 

  44. LEP Higgs Working Group for Higgs boson searches, ALEPH, DELPHI, L3, OPAL collaborations, Search for charged Higgs bosons: Preliminary combined results using LEP data collected at energies up to 209-GeV, hep-ex/0107031 [INSPIRE].

  45. CDF collaboration, A. Abulencia et al., Search for charged Higgs bosons from top quark decays in \( p\overline{p} \) collisions at \( \sqrt{s}=1.96\hbox{-}TeV. \), Phys. Rev. Lett. 96 (2006) 042003 [hep-ex/0510065] [INSPIRE].

    Article  ADS  Google Scholar 

  46. D0 collaboration, V. Abazov et al., Search for charged Higgs bosons in top quark decays, Phys. Lett. B 682 (2009) 278 [arXiv:0908.1811] [INSPIRE].

    ADS  Google Scholar 

  47. ATLAS collaboration, Search for charged Higgs bosons decaying via H + → τν in top quark pair events using pp collision data at \( \sqrt{s}=7 \) TeV with the ATLAS detector, JHEP 06 (2012) 039 [arXiv:1204.2760] [INSPIRE].

    ADS  Google Scholar 

  48. CMS collaboration, Search for a light charged Higgs boson in top quark decays in pp collisions at \( \sqrt{s}=7 \) TeV, JHEP 07 (2012) 143 [arXiv:1205.5736] [INSPIRE].

    ADS  Google Scholar 

  49. M.-Z. Wang (Belle collaboration), Charm Decays at Belle, talk given at ICHEP 2012, Melbourne, Australia, July 4-11th, 2012.

  50. G. Rong, Review and Report on Results of Leptonic Decays of D + and \( D_s^{+} \) Mesons, arXiv:1209.0085 [INSPIRE].

  51. M. Tanaka, Charged Higgs effects on exclusive semitauonic B decays, Z. Phys. C 67 (1995) 321 [hep-ph/9411405] [INSPIRE].

    ADS  Google Scholar 

  52. C.-H. Chen and C.-Q. Geng, Lepton angular asymmetries in semileptonic charmful B decays, Phys. Rev. D 71 (2005) 077501 [hep-ph/0503123] [INSPIRE].

    ADS  Google Scholar 

  53. C.-H. Chen and C.-Q. Geng, Charged Higgs on \( {B^{-}}\to \tau {{\overline{\nu}}_{\tau }} \) and \( \overline{B}\to P(V)\ell {{\overline{\nu}}_{\ell }} \), JHEP 10 (2006) 053 [hep-ph/0608166] [INSPIRE].

    Article  ADS  Google Scholar 

  54. U. Nierste, S. Trine and S. Westhoff, Charged-Higgs effects in a new B → Dτν differential decay distribution, Phys. Rev. D 78 (2008) 015006 [arXiv:0801.4938] [INSPIRE].

    ADS  Google Scholar 

  55. M. Tanaka and R. Watanabe, Tau longitudinal polarization in B → Dτν and its role in the search for charged Higgs boson, Phys. Rev. D 82 (2010) 034027 [arXiv:1005.4306] [INSPIRE].

    ADS  Google Scholar 

  56. T. Aushev et al., Physics at Super B Factory, arXiv:1002.5012 [INSPIRE].

  57. SuperB collaboration, B. O’Leary et al., SuperB Progress Reports - Physics, arXiv:1008.1541 [INSPIRE].

  58. A. Hocker, H. Lacker, S. Laplace and F. Le Diberder, A New approach to a global fit of the CKM matrix, Eur. Phys. J. C 21 (2001) 225 [hep-ph/0104062] [INSPIRE].

    Article  ADS  Google Scholar 

  59. UTfit collaboration, M. Bona et al., The 2004 UTfit collaboration report on the status of the unitarity triangle in the standard model, JHEP 07 (2005) 028 [hep-ph/0501199] [INSPIRE].

    Article  ADS  Google Scholar 

  60. M. Antonelli et al., Flavor Physics in the Quark Sector, Phys. Rept. 494 (2010) 197 [arXiv:0907.5386] [INSPIRE].

    Article  ADS  Google Scholar 

  61. Heavy Flavor Averaging Group collaboration, Y. Amhis et al., Averages of b-hadron, c-hadron and tau-lepton properties as of early 2012, arXiv:1207.1158 [INSPIRE].

  62. V. Cirigliano and H. Neufeld, A note on isospin violation in Pℓ2(γ) decays, Phys. Lett. B 700 (2011) 7 [arXiv:1102.0563] [INSPIRE].

    ADS  Google Scholar 

  63. Fermilab Lattice and MILC collaborations, A. Bazavov et al., B- and D-meson decay constants from three-flavor lattice QCD, Phys. Rev. D 85 (2012) 114506 [arXiv:1112.3051] [INSPIRE].

    ADS  Google Scholar 

  64. H. Na, C.J. Monahan, C.T. Davies, R. Horgan, G.P. Lepage and J. Shigemitsu, The B and B s Meson Decay Constants from Lattice QCD, Phys. Rev. D 86 (2012) 034506 [arXiv:1202.4914] [INSPIRE].

    ADS  Google Scholar 

  65. C. McNeile, C. Davies, E. Follana, K. Hornbostel and G. Lepage, High-Precision \( {f_{{{B_s}}}} \) and HQET from Relativistic Lattice QCD, Phys. Rev. D 85 (2012) 031503 [arXiv:1110.4510] [INSPIRE].

    ADS  Google Scholar 

  66. C. Albertus et al., Neutral B-meson mixing from unquenched lattice QCD with domain-wall light quarks and static b-quarks, Phys. Rev. D 82 (2010) 014505 [arXiv:1001.2023] [INSPIRE].

    ADS  Google Scholar 

  67. C. Davies, C. McNeile, E. Follana, G. Lepage, H. Na and J. Shigemitsu, Update: Precision D s decay constant from full lattice QCD using very fine lattices, Phys. Rev. D 82 (2010) 114504 [arXiv:1008.4018] [INSPIRE].

    ADS  Google Scholar 

  68. HPQCD, UKQCD collaborations, E. Follana, C. Davies, G. Lepage and J. Shigemitsu, High Precision determination of the π, K, D and D(s) decay constants from lattice QCD, Phys. Rev. Lett. 100 (2008) 062002 [arXiv:0706.1726] [INSPIRE].

    Article  ADS  Google Scholar 

  69. C. Bernard et al., Status of the MILC light pseudoscalar meson project, PoS(LATTICE2007)090 [arXiv:0710.1118] [INSPIRE].

  70. S. Dürr et al., The ratio FK/Fpi in QCD, Phys. Rev. D 81 (2010) 054507 [arXiv:1001.4692] [INSPIRE].

    ADS  Google Scholar 

  71. W.J. Marciano, Precise determination of |V (us)| from lattice calculations of pseudoscalar decay constants, Phys. Rev. Lett. 93 (2004) 231803 [hep-ph/0402299] [INSPIRE].

    Article  ADS  Google Scholar 

  72. V. Cirigliano and I. Rosell, \( {\pi \left/ {{K\to e{{\overline{\nu}}_e}}} \right.} \) branching ratios to O(e 2 p 4 ) in Chiral Perturbation Theory, JHEP 10 (2007) 005 [arXiv:0707.4464] [INSPIRE].

    Article  ADS  Google Scholar 

  73. V. Cirigliano and I. Rosell, Two-loop effective theory analysis of \( \pi (K)\to e{{\overline{\nu}}_e}\left[ \gamma \right] \) branching ratios, Phys. Rev. Lett. 99 (2007) 231801 [arXiv:0707.3439] [INSPIRE].

    Article  ADS  Google Scholar 

  74. M. Antonelli et al., An Evaluation of |V us| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays, Eur. Phys. J. C 69 (2010) 399 [arXiv:1005.2323] [INSPIRE].

    Article  ADS  Google Scholar 

  75. V. Cirigliano, G. Ecker, H. Neufeld, A. Pich and J. Portoles, Kaon Decays in the Standard Model, Rev. Mod. Phys. 84 (2012) 399 [arXiv:1107.6001] [INSPIRE].

    Article  ADS  Google Scholar 

  76. W.J. Marciano and A. Sirlin, Radiative corrections to π ℓ2 decays, Phys. Rev. Lett. 71 (1993) 3629 [INSPIRE].

    Article  ADS  Google Scholar 

  77. R. Decker and M. Finkemeier, Short and long distance effects in the decay τ → πν τ (γ), Nucl. Phys. B 438 (1995) 17 [hep-ph/9403385] [INSPIRE].

    Article  ADS  Google Scholar 

  78. R. Decker and M. Finkemeier, Radiative corrections to the decay τ → πν τ , Nucl. Phys. Proc. Suppl. 40 (1995) 453 [hep-ph/9411316] [INSPIRE].

    Article  ADS  Google Scholar 

  79. J. Hardy and I. Towner, Superallowed 0+ → 0+ nuclear beta decays: A New survey with precision tests of the conserved vector current hypothesis and the standard model, Phys. Rev. C 79 (2009) 055502 [arXiv:0812.1202] [INSPIRE].

    ADS  Google Scholar 

  80. I. Caprini, L. Lellouch and M. Neubert, Dispersive bounds on the shape of \( \overline{B}\to D\left( * \right) \) lepton anti-neutrino form-factors, Nucl. Phys. B 530 (1998) 153 [hep-ph/9712417] [INSPIRE].

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. IFIC, Universitat de València — CSIC, Apt. Correus 22085, E-46071, València, Spain

    Alejandro Celis, Xin-Qiang Li & Antonio Pich

  2. Institut für Physik, Technische Universität Dortmund, D-44221, Dortmund, Germany

    Martin Jung

  3. Department of Physics, Henan Normal University, Xinxiang, Henan, 453007, P. R. China

    Xin-Qiang Li

Authors
  1. Alejandro Celis
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Martin Jung
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Xin-Qiang Li
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Antonio Pich
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Xin-Qiang Li.

Additional information

ArXiv ePrint: 1210.8443

Rights and permissions

Reprints and permissions

About this article

Cite this article

Celis, A., Jung, M., Li, XQ. et al. Sensitivity to charged scalars in B → D (*) τν τ and B → τν τ decays. J. High Energ. Phys. 2013, 54 (2013). https://doi.org/10.1007/JHEP01(2013)054

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/JHEP01(2013)054

Keywords

Search

Navigation