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CP violation in polarized \(B\rightarrow \pi \ell^ + \ell^-\) and \(B\rightarrow \rho \ell^ + \ell^-\) decays

theoretical physics

Abstract.

We study the decay rate and the CP violating asymmetry of the exclusive \(B\rightarrow \pi \ell^ + \ell^-\) and \(B\rightarrow \rho \ell^ + \ell^-\) decays in the case where one of the final leptons is polarized. We calculate the contributions coming from the individual polarization states in order to identify a so-called wrong sign decay, which is a decay with a given polarization, whose width and CP asymmetry are smaller as compared to the unpolarized one. The results are presented for electrons and tau leptons. We observe that in particular decay channels, one can identify a wrong sign decay which is more sensitive to new physics beyond the standard model.

Keywords

Field Theory Elementary Particle Quantum Field Theory Decay Rate Polarization State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    J.L. Hewett, in Proceedings of the 21st Annual SLAC Summer Institute, SLAC-PUB-6521, 1994, edited by L. De Porcel, C. Dunwoode; J.L. Hewett, hep-ph/9803370Google Scholar
  2. 2.
    J.P. Alexander et al. [CLEO Collaboration], Phys. Rev. Lett. 77, 5000 (1996); Phys. Rev. D 61, 052001 (2000)CrossRefPubMedGoogle Scholar
  3. 3.
    J. Kaneko et al. [Belle Collaboration], Phys. Rev. Lett. 90, 021801 (2003)CrossRefPubMedGoogle Scholar
  4. 4.
    A. Ali, E. Lunghi, C. Greub, G. Hiller, Phys. Rev. D 66, 034002 (2002)CrossRefGoogle Scholar
  5. 5.
    B. Aubert et al. [BABAR Collaboration], hep-ex/0308016Google Scholar
  6. 6.
    T.M. Aliev, D.A. Demir, E. Iltan, N.K. Pak, Phys. Rev. D 54, 851 (1996)CrossRefGoogle Scholar
  7. 7.
    D.S. Du, M.Z. Yang, Phys. Rev. D 54, 882 (1996)CrossRefGoogle Scholar
  8. 8.
    F. Krüger, L.M. Sehgal, Phys. Rev. D 55, 2799 (1997)CrossRefGoogle Scholar
  9. 9.
    F. Krüger, L.M. Sehgal, Phys. Rev. D 56, 5452 (1997); D 60, 099905 (1999) (E)CrossRefGoogle Scholar
  10. 10.
    G. Erkol, G. Turan, J. Phys. G 28, 2983 (2002)CrossRefGoogle Scholar
  11. 11.
    G. Erkol, G. Turan, Eur. Phys. J. C 28, 243 (2003)Google Scholar
  12. 12.
    T.M. Aliev, M. Savcı, Phys. Rev. D 60, 014005 (1999)CrossRefGoogle Scholar
  13. 13.
    E.O. Iltan, Int. J. Mod. Phys. A 14, 4365 (1999)CrossRefGoogle Scholar
  14. 14.
    G. Erkol, G. Turan, J. High Energy Phys. 02, 015 (2002)CrossRefGoogle Scholar
  15. 15.
    S. Rai Choudhury, N. Gaur, Phys. Rev. D 66, 094015 (2002)CrossRefGoogle Scholar
  16. 16.
    S. Rai Choudhury, N. Gaur, hep-ph/0207353Google Scholar
  17. 17.
    K.S. Babu, K.R.S. Balaji, I. Schienbein, Phys. Rev. D 68, 014021 (2003)CrossRefGoogle Scholar
  18. 18.
    T.M. Aliev, V. Bashiry, M. Savci, Eur. Phys. J. C 31, 511 (2003)Google Scholar
  19. 19.
    B. Grinstein, R. Springer, M. Wise, Nucl. Phys. B 339, 269 (1990)CrossRefGoogle Scholar
  20. 20.
    A.J. Buras, M. Misiak, M. Münz, S. Pokorski, Nucl. Phys. B 424, 372 (1994)CrossRefGoogle Scholar
  21. 21.
    M. Misiak, Nucl. Phys. B 393, 23 (1993); B 439, 461 (1993) (E); A.J. Buras, M. Münz, Phys. Rev. D 52, 186 (1995)CrossRefGoogle Scholar
  22. 22.
    G. Buchalla, A. Buras, M. Lautenbacher, Rev. Mod. Phys. 68, 1125 (1996)CrossRefGoogle Scholar
  23. 23.
    K. Adel, Y.P. Yao, Phys. Rev. D 49, 4945 (1994)CrossRefGoogle Scholar
  24. 24.
    C. Greub, T. Hurth, Phys. Rev. D 56, 2934 (1997)CrossRefGoogle Scholar
  25. 25.
    A.J. Buras, A. Kwiatkowski, N. Pott, Nucl. Phys. B 517, 353 (1998)CrossRefGoogle Scholar
  26. 26.
    C. Bobeth, M. Misiak, J. Urban, Nucl. Phys. B 574, 291 (2000)CrossRefGoogle Scholar
  27. 27.
    P. Gambino, M. Gorbahn, U. Haisch, Nucl. Phys. B 673, 238 (2003)CrossRefGoogle Scholar
  28. 28.
    H.H. Asatryan, H.M. Asatrian, C. Greub, M. Walker, Phys. Rev. D 65, 074004 (2002)CrossRefGoogle Scholar
  29. 29.
    H.H. Asatryan, H.M. Asatrian, C. Greub, M. Walker, Phys. Rev. D 66, 034009 (2002)CrossRefGoogle Scholar
  30. 30.
    A. Ghinculov, T. Hurth, G. Isidori, Y.P. Yao, Eur. Phys. J. C 33, S288 (2004)Google Scholar
  31. 31.
    A. Ghinculov, T. Hurth, G. Isidori, Y.P. Yao, Nucl. Phys. B 648, 254 (2003)CrossRefGoogle Scholar
  32. 32.
    H.M. Asatrian, K. Bieri, C. Greub, A. Hovhannisyan, Phys. Rev. D 66, 094013 (2002)CrossRefGoogle Scholar
  33. 33.
    A. Ghinculov, T. Hurth, G. Isidori, Y.P. Yao, Nucl. Phys. Proc. Suppl. 116, 284 (2003)CrossRefGoogle Scholar
  34. 34.
    H.M. Asatrian, H.H. Asatryan, A. Hovhannisyan, V. Poghosyan, Mod. Phys. Lett. A 19, 603 (2004)CrossRefGoogle Scholar
  35. 35.
    T. Hurth, Rev. Mod. Phys. 75, 1159 (2003)CrossRefGoogle Scholar
  36. 36.
    H.M. Asatrian, K. Bieri, C. Greub, M. Walker, Phys. Rev. D 69, 074007 (2004)CrossRefGoogle Scholar
  37. 37.
    A. Ali, T. Mannel, T. Morozumi, Phys. Lett. B 273, 505 (1991)CrossRefGoogle Scholar
  38. 38.
    C.Q. Geng, C.P. Kao, Phys. Rev. D 54, 5636 (1996)CrossRefGoogle Scholar
  39. 39.
    T.M. Aliev, M.K. Çakmak, M. Savcı, Nucl. Phys. B 607, 305 (2001)CrossRefGoogle Scholar
  40. 40.
    L. Wolfenstein, Phys. Rev. Lett. 51, 1945 (1983)CrossRefGoogle Scholar
  41. 41.
    D. Melikhov, B. Stech, Phys. Rev. D 62, 014006 (2000)CrossRefGoogle Scholar
  42. 42.
    P. Ball, JHEP 9809, 005 (1998); 9901, 010 (1999)CrossRefGoogle Scholar
  43. 43.
    P. Ball, hep-ph/0308249Google Scholar
  44. 44.
    P. Ball, V.M. Braun, Phys. Rev. D 58, 094016 (1998)CrossRefGoogle Scholar
  45. 45.
    P. Ball, hep-ph/0412079Google Scholar
  46. 46.
    L.D. Debbio et al. [UKQCD Collaboration], Phys. Lett. B 416, 392 (1998)CrossRefGoogle Scholar
  47. 47.
    C.D. Lü, M.Z. Yang, Eur. Phys. J. C 28, 515 (2003)Google Scholar
  48. 48.
    M. Beneke, T. Feldmann, Nucl. Phys. B 592, 3 (2001)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2005

Authors and Affiliations

  1. 1.Theory Group, KVIUniversity of GroningenGroningenThe Netherlands
  2. 2.Physics DepartmentMiddle East Technical University, Inonu Bul.Ankara

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