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Sub-GeV U(1)R gauge boson to address the proton radius discrepancy

Carlos Alvarado1,*, Alfredo Aranda2,1,†, and Cesar Bonilla3,1,‡

  • 1Dual CP Institute of High Energy Physics, C.P. 28045, Colima, México
  • 2Facultad de Ciencias, Universidad de Colima, Colima 28010, Mexico
  • 3Departamento de Física, Universidad Católica del Norte, Avenida Angamos 0610, Casilla 1280, Antofagasta, Chile

  • *calvara@dcpihep.com
  • †fefo@ucol.mx
  • ‡cesar.bonilla@ucn.cl
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Phys. Rev. D 104, 115019 – Published 17 December, 2021

DOI: https://doi.org/10.1103/PhysRevD.104.115019

Abstract

We propose a Standard Model extension by a U(1)R gauge symmetry where only right-handed chiral fermions can carry a nontrivial charge. Here, we show that the simplest anomaly-free solution to accommodate the proton charge radius discrepancy takes right-handed muons, μR, and first generation quarks, uR and dR. Consistency with the latest muon’s (g−2) measurements is achieved through an extra light scalar, which itself must lie in the tens of MeV mass range to be viable.

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References (35)

  1. C. Bonilla, T. Modak, R. Srivastava, and J. W. F. Valle, U(1)B3−3Lμ gauge symmetry as a simple description of b→s anomalies, Phys. Rev. D 98, 095002 (2018).
  2. R. Aaij et al. (LHCb Collaboration), Test of lepton universality in beauty-quark decays, arXiv:2103.11769.
  3. W. Altmannshofer and P. Stangl, New physics in rare B decays after Moriond 2021, Eur. Phys. J. C 81, 952 (2021).
  4. B. Abi et al. (Muon g-2 Collaboration), Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm, Phys. Rev. Lett. 126, 141801 (2021).
  5. R. Pohl et al., The size of the proton, Nature (London) 466, 213 (2010).
  6. A. Antognini, F. Nez, and Schuhmann, Proton structure from the measurement of 2s-2p transition frequencies of muonic hydrogen, Science 339, 417 (2013).
  7. P. J. Mohr, D. B. Newell, and B. N. Taylor, CODATA recommended values of the fundamental physical constants: 2014, Rev. Mod. Phys. 88, 035009 (2016).
  8. E. Tiesinga, P. J. Mohr, D. B. Newell, and B. N. Taylor, Codata recommended values of the fundamental physical constants: 2018, Rev. Mod. Phys. 93, 025010 (2021).
  9. N. Bezginov, T. Valdez, M. Horbatsch, A. Marsman, A. C. Vutha, and E. A. Hessels, A measurement of the atomic hydrogen lamb shift and the proton charge radius, Science 365, 1007 (2019).
  10. H. Fleurbaey, S. Galtier, S. Thomas, M. Bonnaud, L. Julien, F. M. C. Biraben, F. M. C. Nez, M. Abgrall, and J. Guéna, New Measurement of the 1s−3s Transition Frequency of Hydrogen: Contribution to the Proton Charge Radius Puzzle, Phys. Rev. Lett. 120, 183001 (2018).
  11. M. Mihovilovič et al., The proton charge radius extracted from the initial-state radiation experiment at MAMI, Eur. Phys. J. A 57, 107 (2021).
  12. C. E. Carlson, The proton radius puzzle, Prog. Part. Nucl. Phys. 82, 59 (2015).
  13. H. Gao and M. Vanderhaeghen, The proton charge radius, arXiv:2105.00571.
  14. A. Grinin, A. Matveev, D. C. Yost, L. Maisenbacher, V. Wirthl, R. Pohl, T. W. Hänsch, and T. Udem, Two-photon frequency comb spectroscopy of atomic hydrogen, Science 370, 1061 (2020).
  15. C. E. Carlson and B. C. Rislow, New physics and the proton radius problem, Phys. Rev. D 86, 035013 (2012).
  16. B. Batell, D. McKeen, and M. Pospelov, New Parity-Violating Muonic Forces and the Proton Charge Radius, Phys. Rev. Lett. 107, 011803 (2011).
  17. M. Perelstein and Y. C. San, Dark matter as a solution to muonic puzzles, Phys. Rev. D 103, 035032 (2021).
  18. B. Zhu and X. Liu, Probing the flavor-specific scalar mediator for the muon (g−2) deviation, the proton radius puzzle and the light dark matter production, arXiv:2104.03238.
  19. T. Albahri et al. (Muon g-2 Collaboration), Magnetic-field measurement and analysis for the Muon g−2 Experiment at Fermilab, Phys. Rev. A 103, 042208 (2021).
  20. S. Borsanyi et al., Leading hadronic contribution to the muon 2 magnetic moment from lattice QCD, Nature (London) 593, 51 (2021).
  21. P. Fayet, Extra u(1)’s and new forces, Nucl. Phys. B347, 743 (1990).
  22. P. Fayet, The light U boson as the mediator of a new force, coupled to a combination of Q, B, L and dark matter, Eur. Phys. J. C 77, 53 (2017).
  23. C. Bonilla and J. W. F. Valle, Naturally light neutrinos in Diracon model, Phys. Lett. B 762, 162 (2016).
  24. M. Lindner, F. S. Queiroz, W. Rodejohann, and X.-J. Xu, Neutrino-electron scattering: General constraints on Z′ and dark photon models, J. High Energy Phys. 05 (2018) 098.
  25. T. Abe, R. Sato, and K. Yagyu, Muon specific two-Higgs-doublet model, J. High Energy Phys. 07 (2017) 012.
  26. Y.-S. Liu, D. McKeen, and G. A. Miller, Electrophobic Scalar Boson and Muonic Puzzles, Phys. Rev. Lett. 117, 101801 (2016).
  27. A. Gérardin, The anomalous magnetic moment of the muon: Status of Lattice QCD calculations, Eur. Phys. J. A 57, 116 (2021).
  28. M. Davier, A. Hoecker, B. Malaescu, and Z. Zhang, A new evaluation of the hadronic vacuum polarisation contributions to the muon anomalous magnetic moment and to α(mZ2), Eur. Phys. J. C 80, 241 (2020); 80, 410(E) (2020).
  29. T. Aoyama et al., The anomalous magnetic moment of the muon in the standard model, Phys. Rep. 887, 1 (2020).
  30. F. Jegerlehner and A. Nyffeler, The Muon g-2, Phys. Rep. 477, 1 (2009).
  31. D. V. Kirpichnikov, V. E. Lyubovitskij, and A. S. Zhevlakov, Implication of hidden sub-GeV bosons for the (g−2)μ, Be8−He4 anomaly, proton charge radius, EDM of fermions, and dark axion portal, Phys. Rev. D 102, 095024 (2020).
  32. M. Bauer, P. Foldenauer, and M. Mosny, Flavor structure of anomaly-free hidden photon models, Phys. Rev. D 103, 075024 (2021).
  33. D. Banerjee et al., Dark Matter Search in Missing Energy Events with NA64, Phys. Rev. Lett. 123, 121801 (2019).
  34. C. Alvarado, A. Aranda, and C. Bonilla (to be published).
  35. M. Lindner, M. Platscher, and F. S. Queiroz, A call for new physics: The muon anomalous magnetic moment and lepton flavor violation, Phys. Rep. 731, 1 (2018).

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Phys. Rev. D 104, 115019– Published 17 December, 2021
  • Received 15 July 2021
  • Accepted 24 November 2021
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