Skip to main content
SpringerLink
Log in

Probing leptonic interactions of a family-nonuniversal Z′ boson

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

Abstract

We explore a Z′ boson with family-nonuniversal couplings to charged leptons. The general effect of Z-Z′ mixing, of both kinetic and mass types, is included in the analysis. Adopting a model-independent approach, we perform a comprehensive study of constraints on the leptonic Z′ couplings from currently available experimental data on a number of flavor-conserving and flavor-changing transitions. Detailed comparisons are made to extract the most stringent bounds on the leptonic couplings. Such information is fed into predictions of various processes that may be experimentally probed in the near future.

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. D0 collaboration, V.M. Abazov et al., First measurement of the forward-backward charge asymmetry in top quark pair production, Phys. Rev. Lett. 100 (2008) 142002 [arXiv:0712.0851] [INSPIRE].

    Article  ADS  Google Scholar 

  2. CDF collaboration, T. Aaltonen et al., Forward-backward asymmetry in top quark production in \( p\overline p \) collisions at \( \sqrt {s} = 1.96\;TeV \), Phys. Rev. Lett. 101 (2008) 202001 [arXiv:0806.2472] [INSPIRE].

    Article  ADS  Google Scholar 

  3. CDF collaboration, T. Aaltonen et al., Evidence for a mass dependent forward-backward asymmetry in top quark pair production, Phys. Rev. D 83 (2011) 112003 [arXiv:1101.0034] [INSPIRE].

    ADS  Google Scholar 

  4. D0 collaboration, V.M. Abazov et al., Evidence for an anomalous like-sign dimuon charge asymmetry, Phys. Rev. D 82 (2010) 032001 [arXiv:1005.2757] [INSPIRE].

    ADS  Google Scholar 

  5. D0 collaboration, V.M. Abazov et al., Evidence for an anomalous like-sign dimuon charge asymmetry, Phys. Rev. Lett. 105 (2010) 081801 [arXiv:1007.0395] [INSPIRE].

    Article  ADS  Google Scholar 

  6. D0 collaboration, V.M. Abazov et al., Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb −1 of \( p\overline p \) collisions, Phys. Rev. D 84 (2011) 052007 [arXiv:1106.6308] [INSPIRE].

    ADS  Google Scholar 

  7. CDF collaboration, T. Aaltonen et al., Invariant mass distribution of jet pairs produced in association with a W boson in \( p\overline p \) collisions at \( \sqrt {s} = 1.96\;TeV \), Phys. Rev. Lett. 106 (2011) 171801 [arXiv:1104.0699] [INSPIRE].

    Article  ADS  Google Scholar 

  8. D0 collaboration, V.M. Abazov et al., Bounds on an anomalous dijet resonance in W + jets production in \( p\overline p \) collisions at \( \sqrt {s} = 1.96\;TeV \), Phys. Rev. Lett. 107 (2011) 011804 [arXiv:1106.1921] [INSPIRE].

    Article  ADS  Google Scholar 

  9. S. Jung, H. Murayama, A. Pierce and J.D. Wells, Top quark forward-backward asymmetry from new t-channel physics, Phys. Rev. D 81 (2010) 015004 [arXiv:0907.4112] [INSPIRE].

    ADS  Google Scholar 

  10. K. Cheung, W.-Y. Keung and T.-C. Yuan, Top quark forward-backward asymmetry, Phys. Lett. B 682 (2009) 287 [arXiv:0908.2589] [INSPIRE].

    ADS  Google Scholar 

  11. N.G. Deshpande, X.-G. He and G. Valencia, D0 dimuon asymmetry in \( {B_s} - {\overline B_s} \) mixing and constraints on new physics, Phys. Rev. D 82 (2010) 056013 [arXiv:1006.1682] [INSPIRE].

    ADS  Google Scholar 

  12. A.K. Alok, S. Baek and D. London, Neutral gauge boson contributions to the dimuon charge asymmetry in B decays, JHEP 07 (2011) 111 [arXiv:1010.1333] [INSPIRE].

    Article  ADS  Google Scholar 

  13. M.R. Buckley, D. Hooper, J. Kopp and E. Neil, Light Z′ bosons at the Tevatron, Phys. Rev. D 83 (2011) 115013 [arXiv:1103.6035] [INSPIRE].

    ADS  Google Scholar 

  14. F. Yu, A Z′ model for the CDF dijet anomaly, Phys. Rev. D 83 (2011) 094028 [arXiv:1104.0243] [INSPIRE].

    ADS  Google Scholar 

  15. K. Cheung and J. Song, Baryonic Z′ explanation for the CDF W jj excess, Phys. Rev. Lett. 106 (2011) 211803 [arXiv:1104.1375] [INSPIRE].

    Article  ADS  Google Scholar 

  16. P. Ko, Y. Omura and C. Yu, Dijet resonance from leptophobic Z′ and light baryonic cold dark matter, arXiv:1104.4066 [INSPIRE].

  17. P.J. Fox, J. Liu, D. Tucker-Smith and N. Weiner, An effective Z′, arXiv:1104.4127 [INSPIRE].

  18. S. Chang, K.Y. Lee and J. Song, The CDF dijet excess and \( Z_{{cs}}^{\prime } \) coupled to the second generation quarks, arXiv:1104.4560 [INSPIRE].

  19. F. del Aguila, J. de Blas, P. Langacker and M. Pérez-Victoria, Impact of extra particles on indirect Z′ limits, Phys. Rev. D 84 (2011) 015015 [arXiv:1104.5512] [INSPIRE].

    ADS  Google Scholar 

  20. Z. Liu, P. Nath and G. Peim, An explanation of the CDF dijet anomaly within a U(1)X Stueckelberg extension, Phys. Lett. B 701 (2011) 601 [arXiv:1105.4371] [INSPIRE].

    ADS  Google Scholar 

  21. J.L. Hewett and T.G. Rizzo, Dissecting the Wjj anomaly: diagnostic tests of a leptophobic Z′, [arXiv:1106.0294] [INSPIRE].

  22. J. Fan, D. Krohn, P. Langacker and I. Yavin, A Higgsophilic s-channel Z′ and the CDF W + 2j anomaly, arXiv:1106.1682 [INSPIRE].

  23. P. Ko, Y. Omura and C. Yu, Top forward-backward asymmetry and the CDF Wjj excess in leptophobic U(1)′ flavor models, arXiv:1108.0350 [INSPIRE].

  24. E. Nardi, Z′, new fermions and flavor changing processes. Constraints on E 6 models from μ → eee, Phys. Rev. D 48 (1993) 1240 [hep-ph/9209223] [INSPIRE].

    ADS  Google Scholar 

  25. J. Bernabeu, E. Nardi and D. Tommasini, μ-e conversion in nuclei and Z′ physics, Nucl. Phys. B 409 (1993) 69 [hep-ph/9306251] [INSPIRE].

    Article  ADS  Google Scholar 

  26. Y. Nir and D.J. Silverman, Z mediated flavor changing neutral currents and their implications for CP asymmetries in B0 decays, Phys. Rev. D 42 (1990) 1477 [INSPIRE].

    ADS  Google Scholar 

  27. V.D. Barger, M.S. Berger and R.J. Phillips, Quark singlets: implications and constraints, Phys. Rev. D 52 (1995) 1663 [hep-ph/9503204] [INSPIRE].

    ADS  Google Scholar 

  28. M.B. Popovic and E.H. Simmons, Weak singlet fermions: models and constraints, Phys. Rev. D 62 (2000) 035002 [hep-ph/0001302] [INSPIRE].

    ADS  Google Scholar 

  29. K.S. Babu, C.F. Kolda and J. March-Russell, Leptophobic U(1)’s and the R b-R c crisis, Phys. Rev. D 54 (1996) 4635 [hep-ph/9603212] [INSPIRE].

    ADS  Google Scholar 

  30. K.S. Babu, C.F. Kolda and J. March-Russell, Implications of generalized Z Z′ mixing, Phys. Rev. D 57 (1998) 6788 [hep-ph/9710441] [INSPIRE].

    ADS  Google Scholar 

  31. T.G. Rizzo, Gauge kinetic mixing and leptophobic Z′ in E 6 and SO(10), Phys. Rev. D 59 (1999) 015020 [hep-ph/9806397] [INSPIRE].

    ADS  Google Scholar 

  32. K. Leroux and D. London, Flavor changing neutral currents and leptophobic Z′ gauge bosons, Phys. Lett. B 526 (2002) 97 [hep-ph/0111246] [INSPIRE].

    ADS  Google Scholar 

  33. S. Chaudhuri, S.-W. Chung, G. Hockney and J.D. Lykken, String consistency for unified model building, Nucl. Phys. B 456 (1995) 89 [hep-ph/9501361] [INSPIRE].

    Article  MathSciNet  ADS  Google Scholar 

  34. G. Cleaver et al., Physics implications of flat directions in free fermionic superstring models. 1: Mass spectrum and couplings, Phys. Rev. D 59 (1999) 055005 [hep-ph/9807479] [INSPIRE].

    ADS  Google Scholar 

  35. M. Cvetič, G. Shiu and A.M. Uranga, Three family supersymmetric standard-like models from intersecting brane worlds, Phys. Rev. Lett. 87 (2001) 201801 [hep-th/0107143] [INSPIRE].

    Article  MathSciNet  ADS  Google Scholar 

  36. M. Cvetič, G. Shiu and A.M. Uranga, Chiral four-dimensional N = 1 supersymmetric type IIA orientifolds from intersecting D6 branes, Nucl. Phys. B 615 (2001) 3 [hep-th/0107166] [INSPIRE].

    Article  ADS  Google Scholar 

  37. M. Cvetič, P. Langacker and G. Shiu, Phenomenology of a three family standard like string model, Phys. Rev. D 66 (2002) 066004 [hep-ph/0205252] [INSPIRE].

    ADS  Google Scholar 

  38. P. Langacker and M. Plümacher, Flavor changing effects in theories with a heavy Z′ boson with family nonuniversal couplings, Phys. Rev. D 62 (2000) 013006 [hep-ph/0001204] [INSPIRE].

    ADS  Google Scholar 

  39. V. Barger, C.-W. Chiang, J. Jiang and P. Langacker, \( {B_s} - {\overline B_s} \) mixing in Z′ models with flavor-changing neutral currents, Phys. Lett. B 596 (2004) 229 [hep-ph/0405108] [INSPIRE].

    ADS  Google Scholar 

  40. V. Barger, C.-W. Chiang, P. Langacker and H.-S. Lee, Solution to the B → πK puzzle in a flavor-changing Z′ model, Phys. Lett. B 598 (2004) 218 [hep-ph/0406126] [INSPIRE].

    ADS  Google Scholar 

  41. A. Arhrib, K. Cheung, C.-W. Chiang and T.-C. Yuan, Single top-quark production in flavor-changing Z′ models, Phys. Rev. D 73 (2006) 075015 [hep-ph/0602175] [INSPIRE].

    ADS  Google Scholar 

  42. K. Cheung, C.-W. Chiang, N.G. Deshpande and J. Jiang, Constraints on flavor-changing Z′ models by B s mixing, Z′ production and B s → μ + μ −, Phys. Lett. B 652 (2007) 285 [hep-ph/0604223] [INSPIRE].

    ADS  Google Scholar 

  43. X.-G. He and G. Valencia, \( {B_s} - {\overline B_s} \) mixing constraints on FCNC and a non-universal Z′, Phys. Rev. D 74 (2006) 013011 [hep-ph/0605202] [INSPIRE].

    ADS  Google Scholar 

  44. X.-G. He and G. Valencia, \( D - \overline D \) mixing constraints on FCNC with a non-universal Z′, Phys. Lett. B 651 (2007) 135 [hep-ph/0703270] [INSPIRE].

    ADS  Google Scholar 

  45. V. Barger et al., b → s transitions in family-dependent U(1)′ models, JHEP 12 (2009) 048 [arXiv:0906.3745] [INSPIRE].

    Article  ADS  Google Scholar 

  46. X.-G. He and G. Valencia, Ansatz for small FCNC with a non-universal Z′, Phys. Lett. B 680 (2009) 72 [arXiv:0907.4034] [INSPIRE].

    ADS  Google Scholar 

  47. Q. Chang, X.-Q. Li and Y.-D. Yang, Family non-universal Z′ effects on \( {\overline B_q} - {B_q} \) mixing, B → X s μ + μ − and B s → μ + μ − decays, JHEP 02 (2010) 082 [arXiv:0907.4408] [INSPIRE].

    Article  ADS  Google Scholar 

  48. C.-W. Chiang, N.G. Deshpande and J. Jiang, Flavor changing effects in family nonuniversal Z′ models, JHEP 08 (2006) 075 [hep-ph/0606122] [INSPIRE].

    Article  ADS  Google Scholar 

  49. J. Heeck and W. Rodejohann, Gauged \( {L_{\mu }} - {L_{\tau }} \) symmetry at the electroweak scale, Phys. Rev. D 84 (2011) 075007 [arXiv:1107.5238] [INSPIRE].

    ADS  Google Scholar 

  50. BaBar collaboration, B. Aubert et al., Searches for lepton flavor violation in the decays τ± → e ±γ and τ± → μ ±γ, Phys. Rev. Lett.104 (2010) 021802 [arXiv:0908.2381] [INSPIRE].

    Article  ADS  Google Scholar 

  51. K. Hayasaka et al., Search for lepton flavor violating tau decays into three leptons with 719 million produced τ +τ − pairs, Phys. Lett. B 687 (2010) 139 [arXiv:1001.3221] [INSPIRE].

    ADS  Google Scholar 

  52. BaBar collaboration, J. Lees et al., Limits on tau lepton-flavor violating decays in three charged leptons, Phys. Rev. D 81 (2010) 111101 [arXiv:1002.4550] [INSPIRE].

    ADS  Google Scholar 

  53. A. Lusiani, Search for lepton-flavor-violating tau decays at the B-factories, PoS (HQL 2010) 054 [arXiv:1012.3733] [INSPIRE].

  54. MEG collaboration, J. Adam et al., New limit on the lepton-flavour violating decay μ + → e +γ, arXiv:1107.5547 [INSPIRE].

  55. P. Langacker, The physics of heavy Z′ gauge bosons, Rev. Mod. Phys. 81 (2009) 1199 [arXiv:0801.1345] [INSPIRE].

    Article  ADS  Google Scholar 

  56. J. Erler and P. Langacker, Electroweak model and constraints on new physics, in Particle Data Group collaboration, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [INSPIRE].

  57. Particle Data Group collaboration, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [INSPIRE].

    ADS  Google Scholar 

  58. ALEPH, DELPHI, L3, OPAL and LEP Electroweak Working Group collaborations, J. Alcaraz et al., A combination of preliminary electroweak measurements and constraints on the standard model, hep-ex/0612034 [INSPIRE].

  59. F. del Aguila, J. de Blas and M. Pérez-Victoria, Electroweak limits on general new vector bosons, JHEP 09 (2010) 033 [arXiv:1005.3998] [INSPIRE].

    Article  Google Scholar 

  60. C.D. Carone and H. Murayama, Possible light U(1) gauge boson coupled to baryon number, Phys. Rev. Lett. 74 (1995) 3122 [hep-ph/9411256] [INSPIRE].

    Article  ADS  Google Scholar 

  61. E. Ma and D.P. Roy, Phenomenology of the \( B - 3{L_{\tau }} \) gauge boson, Phys. Rev. D 58 (1998) 095005 [hep-ph/9806210] [INSPIRE].

    ADS  Google Scholar 

  62. L. Willmann et al., New bounds from searching for muonium to anti-muonium conversion, Phys. Rev. Lett. 82 (1999) 49 [hep-ex/9807011] [INSPIRE].

    Article  ADS  Google Scholar 

  63. OPAL collaboration, G. Abbiendi et al., Search for lepton flavor violation in e + e − collisions at \( \sqrt {s} = 189\;GeV - 209\;GeV \), Phys. Lett. B 519 (2001) 23 [hep-ex/0109011] [INSPIRE].

    ADS  Google Scholar 

  64. BaBar collaboration, B. Aubert et al., Search for the reactions e + e − → μ +τ − and e + e − → e +τ−, Phys. Rev. D 75 (2007) 031103 [hep-ex/0607044] [INSPIRE].

    ADS  Google Scholar 

  65. M.N. Achasov et al., Search for lepton flavor violation process e + e − → eμ in the energy region \( \sqrt {s} = 984 - 1060\;MeV \) and ϕ → eμ decay, Phys. Rev. D 81 (2010) 057102 [arXiv:0911.1232] [INSPIRE].

    ADS  Google Scholar 

  66. X.-G. He, J. Tandean and G. Valencia, Penguin and box diagrams in unitary gauge, Eur. Phys. J. C 64 (2009) 681 [arXiv:0909.3638] [INSPIRE].

    Article  MathSciNet  ADS  Google Scholar 

  67. J.P. Leveille, The second-order weak correction to (g-2) of the muon in arbitrary gauge models, Nucl. Phys. B 137 (1978) 63 [INSPIRE].

    Article  ADS  Google Scholar 

  68. F. Jegerlehner and A. Nyffeler, The muon g-2, Phys. Rept. 477 (2009) 1 [arXiv:0902.3360] [INSPIRE].

    Article  ADS  Google Scholar 

  69. R. Foot and X.-G. He, Comment on ZZ′ mixing in extended gauge theories, Phys. Lett. B 267 (1991) 509 [INSPIRE].

    ADS  Google Scholar 

  70. S. Cassel, D.M. Ghilencea and G.G. Ross, Electroweak and dark matter constraints on a Z′ in models with a hidden valley, Nucl. Phys. B 827 (2010) 256 [arXiv:0903.1118] [INSPIRE].

    Article  ADS  Google Scholar 

  71. M. Williams, C.P. Burgess, A. Maharana and F. Quevedo, New constraints (and motivations) for Abelian gauge bosons in the MeV-TeV mass range, arXiv:1103.4556 [INSPIRE].

  72. F. del Aguila, M. Masip and M. Pérez-Victoria, Physical parameters and renormalization of U(1)a × U(1)b models, Nucl. Phys. B 456 (1995) 531 [hep-ph/9507455] [INSPIRE].

    ADS  Google Scholar 

  73. Y. Mambrini, The ZZ′ kinetic mixing in the light of the recent direct and indirect dark matter searches, JCAP 07 (2011) 009 [arXiv:1104.4799] [INSPIRE].

    ADS  Google Scholar 

  74. B. Körs and P. Nath, Aspects of the Stueckelberg extension, JHEP 07 (2005) 069 [hep-ph/0503208] [INSPIRE].

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Physics and Center for Mathematics and Theoretical Physics, National Central University, Chungli, 320, Taiwan

    Cheng-Wei Chiang, Yi-Fan Lin & Jusak Tandean

  2. Institute of Physics, Academia Sinica, Taipei, 119, Taiwan

    Cheng-Wei Chiang

  3. Physics Division, National Center for Theoretical Sciences, Hsinchu, 300, Taiwan

    Cheng-Wei Chiang

Authors
  1. Cheng-Wei Chiang
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Yi-Fan Lin
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Jusak Tandean
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Jusak Tandean.

Additional information

ArXiv ePrint: 1108.3969

Rights and permissions

Reprints and permissions

About this article

Cite this article

Chiang, CW., Lin, YF. & Tandean, J. Probing leptonic interactions of a family-nonuniversal Z′ boson. J. High Energ. Phys. 2011, 83 (2011). https://doi.org/10.1007/JHEP11(2011)083

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/JHEP11(2011)083

Keywords

Search

Navigation