Hyperfine Interactions

, 239:49 | Cite as

The Mu-MASS (muonium laser spectroscopy) experiment

  • P. CrivelliEmail author
Part of the following topical collections:
  1. Proceedings of the 13th International Conference on Low Energy Antiproton Physics (LEAP 2018) Paris, France, 12-16 March 2018


We present a new experiment, Mu-MASS, aiming for a 1000-fold improvement in the determination of the 1S-2S transition frequency of Muonium (M), the positive-muon/electron bound state. This substantial improvement beyond the current state-of-the-art relies on the novel cryogenic M converters and confinement techniques we developed, on the new excitation and detection schemes which we implemented for positronium spectroscopy and the tremendous advances in generation of UV radiation. This experiment is planned to be performed at the Paul Scherrer Institute (PSI). Interesting anomalies in the muon sector have accumulated: notably the famous anomalous muon magnetic moment (g-2) and the muonic hydrogen Lamb shift measurement which prompted the so-called proton charge radius puzzle. These tantalizing results triggered vibrant activity on both experimental and theoretical sides. Different explanations have been put forward including exciting solutions invoking New Physics beyond the Standard Model. Mu-MASS could contribute to clarifying the origin of these anomalies by providing robust and reliable values of fundamental constants such as the muon mass and a value of the Rydberg constant independent of finite size effects.


Muonium Muon mass Laser spectroscopy 


36.10.Ee 32.10.-f 14.60.Ef 



The author gratefully acknowledge the essential help and support of Aldo Antognini, Dave Cooke, K. Khaw, Klaus Kirch, Dylan Yost, Thomas Prokscha, André Rubbia, Gunther Wichmann and A. Czarnecki, S. Karshenboim, Nikolai Kolachevsky, Klaus Jungmann and Randolf Pohl for the enlightening discussions.


  1. 1.
    Hughes, V.W., McColm, D.W., Ziock, K., Prepost, R.: Phys. Rev. Lett. 5, 63 (1960)ADSCrossRefGoogle Scholar
  2. 2.
    Karshenboim, S.G.: Phys. Rep. 422, 1 (2005)ADSCrossRefGoogle Scholar
  3. 3.
    Parker, R.H., Yu1, C., Zhong, W., Estey, B., Müller, H.: Science 360, 191 (2018)Google Scholar
  4. 4.
    Liu, W., et al.: Phys. Rev. Lett. 82, 711 (1999)ADSCrossRefGoogle Scholar
  5. 5.
    Meyer, V., et al.: Phys. Rev. Lett. 84, 1136 (2000)ADSCrossRefGoogle Scholar
  6. 6.
    Ciezarek, G., Franco Sevilla, M., Hamilton, B., Kowalewski, R., Kuhr, T., Lüth, V., Sato, Y.: Nature 546, 227 (2017)ADSCrossRefGoogle Scholar
  7. 7.
    Willmann, L., et al.: Phys. Rev. Lett. 82, 49 (1999)ADSCrossRefGoogle Scholar
  8. 8.
    Yaouanc, A., de Reotier, D.P.: Muon Spin Rotation, Relaxation, and Resonance: Applications to Condensed Matter. Oxford University Press, Oxford (2011)Google Scholar
  9. 9.
    Czarnecki, A., Lepage, G.P., Marciano, W.J.: Phys. Rev. D 61, 073001 (2000)ADSCrossRefGoogle Scholar
  10. 10.
    Pohl, R., et al.: Nature 466, 213 (2010)ADSCrossRefGoogle Scholar
  11. 11.
    Antognini, A., et al.: Science 339, 417 (2013)ADSCrossRefGoogle Scholar
  12. 12.
    Mohr, P.J., Newell, D.B., Taylor, B.N.: Rev. Mod. Phys. 88, 035009 (2016)ADSCrossRefGoogle Scholar
  13. 13.
    Beyer, A., et al.: Science 358, 79 (2017)ADSMathSciNetCrossRefGoogle Scholar
  14. 14.
    Fleurbaey, H., Galtier, S., Thomas, S., Bonnaud, M., Julien, L., Biraben, F., Nez, F., Abgrall, M., Guena, J.: Phys. Rev. Lett. 120, 183001 (2018)ADSCrossRefGoogle Scholar
  15. 15.
    Bennett, G.W, et al.: Phys. Rev. D73, 072003 (2006)ADSGoogle Scholar
  16. 16.
    Blum, T., et al.: arXiv:1311.2198 [hep-ph]
  17. 17.
    Gohn, W.: FERMILAB-CONF-17-602-PPD. arXiv:1801.00084 [hep-ex].
  18. 18.
    Otani, M., et al.: JPS Conf. Proc. 8, 025008 (2015)Google Scholar
  19. 19.
    Chu, S., Mills, A.P., Yodh, A.G., Nagamine, K., Miyake, Y., Kuga, T.: Phys. Rev. Lett. 60, 101 (1988)ADSCrossRefGoogle Scholar
  20. 20.
    Maas, F.E., et al.: Phys. Lett. A 187, 247 (1994)ADSCrossRefGoogle Scholar
  21. 21.
    Fan, I., et al.: Phys. Rev. A 89, 032513 (2014)ADSCrossRefGoogle Scholar
  22. 22.
    Pachucki, K., Leibfried, D., Weitz, M., Huber, A., König, W., Hänsch, T.W.: J. Phys. B 29, 177 (1996)ADSCrossRefGoogle Scholar
  23. 23.
    Karshenboim, S.: Z. Phys. D 39, 109 (1997)ADSCrossRefGoogle Scholar
  24. 24.
    Karshenboim, S.: Can. J. Phys. 77, 241 (1997)ADSCrossRefGoogle Scholar
  25. 25.
    Jungmann, K.: Nucl. Phys. B 155, 355 (2006)CrossRefGoogle Scholar
  26. 26.
    Jungmann, K.: J. Phys. Soc. Jpn. 85, 091004 (2016)ADSCrossRefGoogle Scholar
  27. 27.
    Mills, A.P.: JPS Conf. Proc. 2, 010401 (2014)ADSGoogle Scholar
  28. 28.
    Antognini, A., Crivelli, P., Prokscha, T., Khaw, K.S., Barbiellini, B., Liszkay, L., Kirch, K., Kwuida, K., Morenzoni, E., Piegsa, F.M., Salman, Z., Suter, A.: Phys. Rev. Lett. 108, 143401 (2012)ADSCrossRefGoogle Scholar
  29. 29.
    Mills, A.P., Imazato, J., Saitoh, S., Uedono, A., Kawashima, Y., Nagamine, K.: Phys. Rev. Lett. 56, 1463 (1986)ADSCrossRefGoogle Scholar
  30. 30.
    Marshall, G.M., Warren, J.B., Garner, D.M., Clark, G.S., Brewer, J.H., Fleming, D.G.: Phys. Lett. 65A, 351 (1978)ADSCrossRefGoogle Scholar
  31. 31.
    Beer, G.A., et al.: Phys. Rev. Lett. 57, 671 (1986)ADSCrossRefGoogle Scholar
  32. 32.
    Janissen, A.C., et al.: Phys. Rev. A 42, 161 (1990)ADSCrossRefGoogle Scholar
  33. 33.
    Khaw, K.S., Antognini, A., Prokscha, T., Kirch, K., Liszkay, L., Salzman, Z., Crivelli, P.: Phys. Rev. A 94, 022716 (2016)ADSCrossRefGoogle Scholar
  34. 34.
    Burkley, Z., Rasor, C., Cooper, S.F., Brandt, A.D., Yost, D.C.: Appl. Phys. B 123, 5 (2017)ADSCrossRefGoogle Scholar
  35. 35.
    Cooper, S.F., Burley, Z., Brandt, A.D., Rasor, C., Yost, D.C.: Opt. Lett. 43, 1375 (2018)ADSCrossRefGoogle Scholar
  36. 36.
    Hanneke, D., Fogwell, S., Gabrielse, G.: Phys. Rev. Lett. 100, 120801 (2008)ADSCrossRefGoogle Scholar
  37. 37.
    Bouchendira, R., Cladé, P., Guellati-Khélifa, S., Nez, F., Biraben, F.: Phys. Rev. Lett. 106, 080801 (2011)ADSCrossRefGoogle Scholar
  38. 38.
    Strasser, P., et al.: Hyperfine Interact. 237, 124 (2016)ADSCrossRefGoogle Scholar
  39. 39.
    Czarnecki, A., Eidelman, S.I., Karshenboim, S.G.: Phys. Rev. D 65, 053004 (2002)ADSCrossRefGoogle Scholar
  40. 40.
    Karshenboim, S., et al.: Nucl. Phys. B (Proc. Suppl.) 162, 260 (2006)ADSCrossRefGoogle Scholar
  41. 41.
    Eides, M.I., Shelyuto, V.A.: Phys. Rev. D 92, 013010 (2015)ADSCrossRefGoogle Scholar
  42. 42.
    Jungmann, K.: Talk at the DPG, Mainz (Germany) (2016)Google Scholar
  43. 43.
    Colladay, D., Kostelecky, V.A.: Phys. Rev. D 55, 6760 (1997)ADSCrossRefGoogle Scholar
  44. 44.
    Colladay, D., Kostelecky, V.A.: Phys. Rev. D 58, 116002 (1998)ADSCrossRefGoogle Scholar
  45. 45.
    Bluhm, R., Kostelecky, V.A., Russell, N.: Phys. Rev. Lett. 82, 2254 (1999)ADSCrossRefGoogle Scholar
  46. 46.
    Kostelecky, V.A.: Phys. Rev. D 69, 105009 (2004)ADSCrossRefGoogle Scholar
  47. 47.
    Kostelecky, V.A., Vargas, A.J.: Phys. Rev. D 92, 056002 (2015)ADSCrossRefGoogle Scholar
  48. 48.
    Kostelecky, V.A., Russell, N.: Data Tables for Lorentz And CPT Violation, 2016 edn. arXiv:0801.0287v9
  49. 49.
    Karshenboim, S.: Astron. Lett. 35, 663 (2009)ADSCrossRefGoogle Scholar
  50. 50.
    Prokscha, T., Morenzoni, E., Deiters, K., Foroughi, F., George, D., Kobler, R., Suter, A., Vrankovic, V.: Nucl. Instrum. Methods Phys. Res., Sect A 595, 317 (2008)ADSCrossRefGoogle Scholar
  51. 51.
    Prokscha, T., et al.: Phys. B Condens. Matter 404, 1007 (2009)ADSCrossRefGoogle Scholar
  52. 52.
    Wichmann, G.: PhD thesis, ETH Zurich Switzerland, available online: (2018)
  53. 53.
    Heiss, M., Wichmann, G., Rubbia, A., Crivelli, P.: arXiv:1805.05886
  54. 54.
    Heiss, M., Wichmann, G., Radics, B., Crivelli, P.: arXiv:1809.07854
  55. 55.
    Haas, M., et al.: Phys. Rev. A 73, 052501 (2006)ADSCrossRefGoogle Scholar
  56. 56.
    Cooke, D.A., Crivelli, P., Alnis, J., Antognini, A., Brown, B., Friedreich, S., Gabard, A., Haensch, T.W., Kirch, K., Rubbia, A., Vrankovic, V.: Hyperfine Int. 233, 67 (2015)ADSCrossRefGoogle Scholar
  57. 57.
    Khaw, K.S., Antognini, A., Crivelli, P., Kirch, K., Morenzoni, E., Salman, Z., Suter, A., Prokscha, T.: JINST 10, P10025 (2015)ADSCrossRefGoogle Scholar
  58. 58.
    Parthey, C.G., Matveev, A., Alnis, J., Bernhardt, B., Beyer, A., Holzwarth, R., Maistrou, A., Pohl, R., Predehl, K., Udem, T. h., Wilken, T., Kolachevsky, N., Abgrall, M., Rovera, D., Salomon, C., Laurent, P., Haensch, T.W.: Phys. Rev. Lett. 107, 203001 (2011)ADSCrossRefGoogle Scholar
  59. 59.
    Bao, Y., et al.: Phys. Rev. Lett. 112, 224801 (2014)ADSCrossRefGoogle Scholar
  60. 60.
    Nagatomo, T., et al.: JPS Conf. Proc. 2, 010102 (2014)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.ETH ZurichInstitute for Particle Physics and AstrophysicsZurichSwitzerland

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