Advertisement

Hyperfine Interactions

, 239:42 | Cite as

Antihydrogen formation in low-energy antiproton collisions with excited-state positronium atoms

  • A. S. KadyrovEmail author
  • C. M. Rawlins
  • M. Charlton
  • I. I. Fabrikant
  • I. Bray
Article
  • 57 Downloads
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

Abstract

The convergent close-coupling method is used to obtain cross sections for antihydrogen formation in low-energy antiproton collisions with positronium (Ps) atoms in specified initial excited states with principal quantum numbers ni ≤ 5. The threshold behaviour as a function of the Ps kinetic energy, E, is consistent with the 1/E law expected from threshold theory for all initial states. We find that the increase in the cross sections is muted above ni = 3 and that here their scaling is roughly consistent with \({n_{i}^{2}}\), rather than the classically expected increase as \({n_{i}^{4}}\).

Keywords

Antihydrogen Antiproton Positronium 

PACS

34.80.-i 

Notes

Acknowledgements

The Australian Research Council, the EPSRC (UK) and the US National Science Foundation (via grant No. PHY-1401788) are thanked for their support.

References

  1. 1.
    Bertsche, W.A., Butler, E., Charlton, M., Madsen, N.: J. Phys. B 48, 232001 (2015)ADSCrossRefGoogle Scholar
  2. 2.
    Andresen, G.B., et al.: ALPHA Collaboration. Nature 468, 673–676 (2010)ADSCrossRefGoogle Scholar
  3. 3.
    Ahmadi, M., et al.: ALPHA Collaboration. Nat. Commun. 8, 681 (2017)ADSCrossRefGoogle Scholar
  4. 4.
    Amole, C., et al.: ALPHA Collaboration. Nature 483, 439–443 (2012)ADSCrossRefGoogle Scholar
  5. 5.
    Ahmadi, M., et al.: ALPHA Collaboration. Nature 529, 373–376 (2016)ADSCrossRefGoogle Scholar
  6. 6.
    Ahmadi, M., et al.: ALPHA Collaboration. Nature 541, 506–510 (2017)ADSCrossRefGoogle Scholar
  7. 7.
    Ahmadi, M., et al.: ALPHA Collaboration. Nature 548, 66–70 (2017)ADSCrossRefGoogle Scholar
  8. 8.
    Amoretti, M., et al.: ATHENA Collaboration. Nature 419, 456–459 (2002)ADSCrossRefGoogle Scholar
  9. 9.
    Gabrielse, G., et al.: ATRAP Collaboration. Phys. Rev. Lett. 89, 213401 (2002)ADSCrossRefGoogle Scholar
  10. 10.
    Holzscheiter, M.H., Charlton, M., Nieto, M.M.: Phys. Rep. 402, 1–101 (2004)ADSCrossRefGoogle Scholar
  11. 11.
    Amole, C., et al.: ALPHA Collaboration. Nucl. Instr. Meth. Phys. Res. A 735, 319–340 (2014)ADSCrossRefGoogle Scholar
  12. 12.
    Madsen, N., Robicheaux, F., Jonsell, S.: New J. Phys. 16, 063046 (2014)ADSCrossRefGoogle Scholar
  13. 13.
    Humberston, J.W., Charlton, M., Jacobsen, F.M., Deutch, B.I.: J. Phys. B 20, L25–L29 (1987)ADSCrossRefGoogle Scholar
  14. 14.
    Charlton, M.: Phys. Lett. A 143, 143–146 (1990)ADSCrossRefGoogle Scholar
  15. 15.
    Deutch, B.I., et al.: Hyperfine Interact. 76, 153–161 (1993)ADSCrossRefGoogle Scholar
  16. 16.
    Storry, C.H., et al.: ATRAP Collaboration. Phys. Rev. Lett. 93, 263401 (2004)ADSCrossRefGoogle Scholar
  17. 17.
    Hessels, E.A., Homan, D.M., Cavagnero, M.J.: Phys. Rev. A 57, 1668–1671 (1998)ADSCrossRefGoogle Scholar
  18. 18.
    McConnell, R., et al.: ATRAP Collaboration. J. Phys. B 49, 064002 (2016)ADSCrossRefGoogle Scholar
  19. 19.
    Krasnický, D., et al.: AEGIS Collaboration. Int. J. Mod. Phys. Conf. Ser. 30, 1460262 (2014)CrossRefGoogle Scholar
  20. 20.
    Doser, M., et al.: AEGIS Collaboration. Class. Quant. Grav. 29, 184009 (2012)ADSCrossRefGoogle Scholar
  21. 21.
    van der Werf, D.P.: Int. J. Mod. Phys. Conf. Ser. 30, 1460263 (2014)CrossRefGoogle Scholar
  22. 22.
    Pérez, P., et al.: GBAR Collaboration. Hyperfine Interact. 233, 21–27 (2015)ADSCrossRefGoogle Scholar
  23. 23.
    Hogan S.D.: EPJ Tech. 3, 2 (2016)CrossRefGoogle Scholar
  24. 24.
    Kadyrov, A.S., et al.: Phys. Rev. Lett. 114, 183201 (2015)ADSCrossRefGoogle Scholar
  25. 25.
    Rawlins, C.M., et al.: Phys. Rev. A 93, 012709 (2016)ADSCrossRefGoogle Scholar
  26. 26.
    Charlton, M., Kadyrov, A.S., Bray, I.: Phys. Rev. A 94, 032701 (2016)ADSCrossRefGoogle Scholar
  27. 27.
    Kadyrov, A.S., Bray, I., Charlton, M., Fabrikant, I.I.: Nat. Commun. 8, 1544 (2017)ADSCrossRefGoogle Scholar
  28. 28.
    Valdes, M., Dufour, M., Lazauskas, R., Hervieux, P.-A.: Phys. Rev. A 97, 012709 (2018)ADSCrossRefGoogle Scholar
  29. 29.
    Humberston, J.W., et al.: J. Phys. B 30, 2477–2493 (1997)ADSCrossRefGoogle Scholar
  30. 30.
    Crivelli, P., et al.: Phys. Rev. A 81, 052705 (2010)ADSCrossRefGoogle Scholar
  31. 31.
    Cassidy, D.B., et al.: Phys. Rev. A 81, 012715 (2010)ADSCrossRefGoogle Scholar
  32. 32.
    Kadyrov, A.S., Bray, I.: J. Phys. B 33, L635–L640 (2000)ADSCrossRefGoogle Scholar
  33. 33.
    Kadyrov, A.S., Bray, I.: Phys. Rev. A 66, 012710 (2002)ADSCrossRefGoogle Scholar
  34. 34.
    Utamuratov, R., Kadyrov, A.S., Fursa, D.V., Bray, I: J. Phys. B 43, 031001 (2010)ADSCrossRefGoogle Scholar
  35. 35.
    Lugovskoy, A.V., et al.: Phys. Rev. A 82, 062708 (2010)ADSCrossRefGoogle Scholar
  36. 36.
    Kadyrov, A.S., Lugovskoy, A.V., Utamuratov, R., Bray, I.: Phys. Rev. A 87, 060701 (2013)ADSCrossRefGoogle Scholar
  37. 37.
    Kadyrov, A.S., Bray, I.: J. Phys. B 49, 222002 (2016)ADSCrossRefGoogle Scholar
  38. 38.
    Wigner, E.P.: Phys. Rev. 73, 1002–1009 (1948)ADSCrossRefGoogle Scholar
  39. 39.
    Gailitis, M., Damburg, R.: Proc. Phys. Soc. 82, 192–200 (1963)ADSCrossRefGoogle Scholar
  40. 40.
    Gailitis, M.: J. Phys. B 15, 3423–3440 (1982)ADSCrossRefGoogle Scholar
  41. 41.
    Fabrikant, I.I., Bray, A., Kadyrov, A.S., Bray, I.: Phys. Rev. A 94, 012701 (2016)ADSCrossRefGoogle Scholar
  42. 42.
    Fabrikant, I.I., Kadyrov, A.S., Bray, I., Charlton, M.: J. Phys. B 50, 134001 (2017)ADSCrossRefGoogle Scholar
  43. 43.
    Côté, R., Heller, E.J., Dalgarno, A.: Phys. Rev. A 53, 234–241 (1996)ADSCrossRefGoogle Scholar
  44. 44.
    Krasnický, D., Caravita, R., Canali, C., Testera, G.: Phys. Rev. A 94, 022714 (2016)ADSCrossRefGoogle Scholar
  45. 45.
    Aghion, S., et al.: AEGIS Collaboration. Phys. Rev. A 94, 102507 (2016)CrossRefGoogle Scholar
  46. 46.
    Jones, A.C.L., et al.: J. Phys. B 49, 064006 (2017)ADSCrossRefGoogle Scholar
  47. 47.
    Baker, C.J., et al.: J. Phys. B 51, 035006 (2018)ADSCrossRefGoogle Scholar
  48. 48.
    Bertsche, W.A., Charlton, M., Eriksson, S.: J. Phys. 19, 053020 (2017)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.Curtin Institute for Computation and Department of Physics and AstronomyCurtin UniversityPerthAustralia
  2. 2.Department of Physics, College of ScienceSwansea UniversitySwanseaUK
  3. 3.Department of Physics and AstronomyUniversity of NebraskaLincolnUSA

Personalised recommendations