CP violation in sbottom decays

Article

Abstract

We study CP asymmetries in two-body decays of bottom squarks into charginos and top quarks. These asymmetries probe the SUSY CP phases of the sbottom and the chargino sector in the Minimal Supersymmetric Standard Model (MSSM). We identify the MSSM parameter space where the CP asymmetries are sizeable. As a result, potentially detectable CP asymmetries in sbottom decays are found, which motivates further detailed experimental studies for probing the SUSY CP phases at the LHC.

Keywords

Beyond Standard Model Supersymmetric Standard Model CP violation 

References

  1. [1]
    H.E. Haber and G.L. Kane, The search for supersymmetry: probing physics beyond the standard model, Phys. Rept. 117 (1985) 75 [SPIRES].CrossRefADSGoogle Scholar
  2. [2]
    H.P. Nilles, Supersymmetry, supergravity and particle physics, Phys. Rept. 110 (1984) 1 [SPIRES].CrossRefADSGoogle Scholar
  3. [3]
    H. Goldberg, Constraint on the photino mass from cosmology, Phys. Rev. Lett. 50 (1983) 1419 [SPIRES].CrossRefADSGoogle Scholar
  4. [4]
    J.R. Ellis, J.S. Hagelin, D.V. Nanopoulos, K.A. Olive and M. Srednicki, Supersymmetric relics from the Big Bang, Nucl. Phys. B 238 (1984) 453 [SPIRES].CrossRefADSGoogle Scholar
  5. [5]
    H. Pagels and J.R. Primack, Supersymmetry, cosmology and new TeV physics, Phys. Rev. Lett. 48 (1982) 223 [SPIRES].CrossRefADSGoogle Scholar
  6. [6]
    G. Bélanger, F. Boudjema, S. Kraml, A. Pukhov and A. Semenov, Relic density of neutralino dark matter in the MSSM with CP-violation, Phys. Rev. D 73 (2006) 115007 [hep-ph/0604150] [SPIRES].ADSGoogle Scholar
  7. [7]
    S.Y. Choi and Y.G. Kim, Heavy Higgs resonances for the neutralino relic density in the Higgs decoupling limit of the CP-noninvariant minimal supersymmetric standard model, Phys. Lett. B 637 (2006) 27 [hep-ph/0602109] [SPIRES].ADSGoogle Scholar
  8. [8]
    J.S. Lee and S. Scopel, Lightest Higgs boson and relic neutralino in the MSSM with CP-violation, Phys. Rev. D 75 (2007) 075001 [hep-ph/0701221] [SPIRES].ADSGoogle Scholar
  9. [9]
    H.E. Haber, The status of the minimal supersymmetric standard model and beyond, Nucl. Phys. Proc. Suppl. 62 (1998) 469 [hep-ph/9709450] [SPIRES].CrossRefADSGoogle Scholar
  10. [10]
    T. Ibrahim and P. Nath, Phases and CP-violation in SUSY, hep-ph/0210251 [SPIRES].
  11. [11]
    T. Ibrahim and P. Nath, CP violation from standard model to strings, Rev. Mod. Phys. 80 (2008) 577 [arXiv:0705.2008] [SPIRES].CrossRefADSGoogle Scholar
  12. [12]
    J.R. Ellis, J.S. Lee and A. Pilaftsis, B-meson observables in the maximally CP-violating MSSM with minimal flavour violation, Phys. Rev. D 76 (2007) 115011 [arXiv:0708.2079] [SPIRES].ADSGoogle Scholar
  13. [13]
    B.C. Regan, E.D. Commins, C.J. Schmidt and D. DeMille, New limit on the electron electric dipole moment, Phys. Rev. Lett. 88 (2002) 071805 [SPIRES].CrossRefADSGoogle Scholar
  14. [14]
    W.C. Griffith et al., Improved limit on the permanent electric dipole moment of Hg-199, Phys. Rev. Lett. 102 (2009) 101601 [SPIRES].CrossRefADSGoogle Scholar
  15. [15]
    K.V.P. Latha, D. Angom, B.P. Das and D. Mukherjee, Probing CP-violation with the electric dipole moment of atomic mercury, Phys. Rev. Lett. 103 (2009) 083001 [arXiv:0902.4790] [SPIRES].CrossRefADSGoogle Scholar
  16. [16]
    C.A. Baker et al., An improved experimental limit on the electric dipole moment of the neutron, Phys. Rev. Lett. 97 (2006) 131801 [hep-ex/0602020] [SPIRES].CrossRefADSGoogle Scholar
  17. [17]
    EDM collaboration, Y.K. Semertzidis et al., A new method for a sensitive deuteron EDM experiment, AIP Conf. Proc. 698 (2004) 200 [hep-ex/0308063] [SPIRES].CrossRefADSGoogle Scholar
  18. [18]
    Y.K. Semertzidis, Electric dipole moments of fundamental particles, Nucl. Phys. Proc. Suppl. 131 (2004) 244 [hep-ex/0401016] [SPIRES].CrossRefADSGoogle Scholar
  19. [19]
    Particle Data Group collaboration, C. Amsler et al., Review of particle physics, Phys. Lett. B 667 (2008) 1 [SPIRES].ADSGoogle Scholar
  20. [20]
    V.D. Barger et al., CP-violating phases in SUSY, electric dipole moments and linear colliders, Phys. Rev. D 64 (2001) 056007 [hep-ph/0101106] [SPIRES].ADSGoogle Scholar
  21. [21]
    T. Ibrahim and P. Nath, The neutron and the electron electric dipole moment in N = 1 supergravity unification, Phys. Rev. D 57 (1998) 478 [Erratum ibid. D 58 (1998) 019901] [Erratum ibid. D 60 (1999) 079903] [hep-ph/9708456] [SPIRES].ADSGoogle Scholar
  22. [22]
    M. Brhlik, G.J. Good and G.L. Kane, Electric dipole moments do not require the CP-violating phases of supersymmetry to be small, Phys. Rev. D 59 (1999) 115004 [hep-ph/9810457] [SPIRES].ADSGoogle Scholar
  23. [23]
    A. Bartl, T. Gajdosik, W. Porod, P. Stöckinger and H. Stremnitzer, Electron and neutron electric dipole moments in the constrained MSSM, Phys. Rev. D 60 (1999) 073003 [hep-ph/9903402] [SPIRES].ADSGoogle Scholar
  24. [24]
    S. Yaser Ayazi and Y. Farzan, Reconciling large CP-violating phases with bounds on the electric dipole moments in the MSSM, Phys. Rev. D 74 (2006) 055008 [hep-ph/0605272] [SPIRES].ADSGoogle Scholar
  25. [25]
    K.A. Olive, M. Pospelov, A. Ritz and Y. Santoso, CP-odd phase correlations and electric dipole moments, Phys. Rev. D 72 (2005) 075001 [hep-ph/0506106] [SPIRES].ADSGoogle Scholar
  26. [26]
    L. Mercolli and C. Smith, EDM constraints on flavored CP-violating phases, Nucl. Phys. B 817 (2009) 1 [arXiv:0902.1949] [SPIRES].CrossRefADSGoogle Scholar
  27. [27]
    J.R. Ellis, S. Ferrara and D.V. Nanopoulos, CP violation and supersymmetry, Phys. Lett. B 114 (1982) 231 [SPIRES].ADSGoogle Scholar
  28. [28]
    S. Abel and O. Lebedev, Neutron electron EDM correlations in supersymmetry and prospects for EDM searches, JHEP 01 (2006) 133 [hep-ph/0508135] [SPIRES].CrossRefADSGoogle Scholar
  29. [29]
    A. Bartl, W. Majerotto, W. Porod and D. Wyler, Effect of supersymmetric phases on lepton dipole moments and rare lepton decays, Phys. Rev. D 68 (2003) 053005 [hep-ph/0306050] [SPIRES].ADSGoogle Scholar
  30. [30]
    J.R. Ellis, J.S. Lee and A. Pilaftsis, Electric dipole moments in the MSSM reloaded, JHEP 10 (2008) 049 [arXiv:0808.1819] [SPIRES].CrossRefADSGoogle Scholar
  31. [31]
    F. Deppisch and O. Kittel, Probing SUSY CP-violation in two-body stop decays at the LHC, JHEP 09 (2009) 110 [Erratum ibid. 03 (2010) 091] [arXiv:0905.3088] [SPIRES].CrossRefADSGoogle Scholar
  32. [32]
    F. Deppisch, H. Pas, A. Redelbach, R. Ruckl and Y. Shimizu, Probing the Majorana mass scale of right-handed neutrinos in mSUGRA, Eur. Phys. J. C 28 (2003) 365 [hep-ph/0206122] [SPIRES].ADSGoogle Scholar
  33. [33]
    F. Deppisch, H. Pas, A. Redelbach and R. Ruckl, Constraints on SUSY seesaw parameters from leptogenesis and lepton flavor violation, Phys. Rev. D 73 (2006) 033004 [hep-ph/0511062] [SPIRES].ADSGoogle Scholar
  34. [34]
    A. Pilaftsis, Resonant CP-violation induced by particle mixing in transition amplitudes, Nucl. Phys. B 504 (1997) 61 [hep-ph/9702393] [SPIRES].CrossRefADSGoogle Scholar
  35. [35]
    A. Pilaftsis, CP-odd tadpole renormalization of Higgs scalar-pseudoscalar mixing, Phys. Rev. D 58 (1998) 096010 [hep-ph/9803297] [SPIRES].ADSGoogle Scholar
  36. [36]
    A. Pilaftsis, Higgs scalar-pseudoscalar mixing in the minimal supersymmetric standard model, Phys. Lett. B 435 (1998) 88 [hep-ph/9805373] [SPIRES].ADSGoogle Scholar
  37. [37]
    A. Pilaftsis and C.E.M. Wagner, Higgs bosons in the minimal supersymmetric standard model with explicit CP-violation, Nucl. Phys. B 553 (1999) 3 [hep-ph/9902371] [SPIRES].CrossRefADSGoogle Scholar
  38. [38]
    S.Y. Choi, M. Drees and J.S. Lee, Loop corrections to the neutral Higgs boson sector of the MSSM with explicit CP-violation, Phys. Lett. B 481 (2000) 57 [hep-ph/0002287] [SPIRES].ADSGoogle Scholar
  39. [39]
    M.S. Carena, J.R. Ellis, A. Pilaftsis and C.E.M. Wagner, Renormalization-group-improved effective potential for the MSSM Higgs sector with explicit CP-violation, Nucl. Phys. B 586 (2000) 92 [hep-ph/0003180] [SPIRES].CrossRefADSGoogle Scholar
  40. [40]
    M.S. Carena, J.R. Ellis, A. Pilaftsis and C.E.M. Wagner, Higgs-boson pole masses in the MSSM with explicit CP-violation, Nucl. Phys. B 625 (2002) 345 [hep-ph/0111245] [SPIRES].CrossRefADSGoogle Scholar
  41. [41]
    S. Heinemeyer, W. Hollik, H. Rzehak and G. Weiglein, The Higgs sector of the complex MSSM at two-loop order: QCD contributions, Phys. Lett. B 652 (2007) 300 [arXiv:0705.0746] [SPIRES].ADSGoogle Scholar
  42. [42]
    S.Y. Choi, J. Kalinowski, Y. Liao and P.M. Zerwas, H/A Higgs mixing in CP-noninvariant supersymmetric theories, Eur. Phys. J. C 40 (2005) 555 [hep-ph/0407347] [SPIRES].CrossRefADSGoogle Scholar
  43. [43]
    M.S. Carena, J.R. Ellis, A. Pilaftsis and C.E.M. Wagner, CP-violating MSSM Higgs bosons in the light of LEP 2, Phys. Lett. B 495 (2000) 155 [hep-ph/0009212] [SPIRES].ADSGoogle Scholar
  44. [44]
    LEP Working Group for Higgs boson searches collaboration, R. Barate et al., Search for the standard model Higgs boson at LEP, Phys. Lett. B 565 (2003) 61 [hep-ex/0306033] [SPIRES].ADSGoogle Scholar
  45. [45]
    ALEPH collaboration, S. Schael et al., Search for neutral MSSM Higgs bosons at LEP, Eur. Phys. J. C 47 (2006) 547 [hep-ex/0602042] [SPIRES].CrossRefADSGoogle Scholar
  46. [46]
    D.K. Ghosh and S. Moretti, Probing the light neutral Higgs boson scenario of the CP-violating MSSM Higgs sector at the LHC, Eur. Phys. J. C 42 (2005) 341 [hep-ph/0412365] [SPIRES].CrossRefADSGoogle Scholar
  47. [47]
    D.K. Ghosh, R.M. Godbole and D.P. Roy, Probing the CP-violating light neutral Higgs in the charged Higgs decay at the LHC, Phys. Lett. B 628 (2005) 131 [hep-ph/0412193] [SPIRES].ADSGoogle Scholar
  48. [48]
    P. Bandyopadhyay, A. Datta, A. Datta and B. Mukhopadhyaya, Associated Higgs Production in CP-violating supersymmetry: probing the ‘open hole’ at the Large Hadron Collider, Phys. Rev. D 78 (2008) 015017 [arXiv:0710.3016] [SPIRES].ADSGoogle Scholar
  49. [49]
    A. Belyaev, Q.-H. Cao, D. Nomura, K. Tobe and C.P. Yuan, Light MSSM Higgs boson scenario and its test at hadron colliders, Phys. Rev. Lett. 100 (2008) 061801 [hep-ph/0609079] [SPIRES].CrossRefADSGoogle Scholar
  50. [50]
    E. Accomando et al., Workshop on CP studies and non-standard Higgs physics, hep-ph/0608079 [SPIRES].
  51. [51]
    A. Bartl, S. Hesselbach, K. Hidaka, T. Kernreiter and W. Porod, Impact of CP phases on stop and sbottom searches, Phys. Lett. B 573 (2003) 153 [hep-ph/0307317] [SPIRES].ADSGoogle Scholar
  52. [52]
    A. Bartl, S. Hesselbach, K. Hidaka, T. Kernreiter and W. Porod, Top squarks and bottom squarks in the MSSM with complex parameters, Phys. Rev. D 70 (2004) 035003 [hep-ph/0311338] [SPIRES].ADSGoogle Scholar
  53. [53]
    A. Bartl, K. Hidaka, T. Kernreiter and W. Porod, Impact of CP phases on the search for sleptons stau and sneutrino/tau, Phys. Lett. B 538 (2002) 137 [hep-ph/0204071] [SPIRES].ADSGoogle Scholar
  54. [54]
    A. Bartl, K. Hidaka, T. Kernreiter and W. Porod, Tau-sleptons and tau-sneutrino in the MSSM with complex parameters, Phys. Rev. D 66 (2002) 115009 [hep-ph/0207186] [SPIRES].ADSGoogle Scholar
  55. [55]
    K. Rolbiecki, J. Tattersall and G. Moortgat-Pick, Measuring the stop mixing angle at the LHC, arXiv:0909.3196 [SPIRES].
  56. [56]
    T. Gajdosik, R.M. Godbole and S. Kraml, Fermion polarization in sfermion decays as a probe of CP phases in the MSSM, JHEP 09 (2004) 051 [hep-ph/0405167] [SPIRES].CrossRefADSGoogle Scholar
  57. [57]
    S.-Y. Choi and M. Drees, CP-violation through scalar tau oscillation, Phys. Lett. B 435 (1998) 356 [hep-ph/9805474] [SPIRES].ADSGoogle Scholar
  58. [58]
    M. Aoki and N. Oshimo, Decay rate asymmetry of top squark, Mod. Phys. Lett. A 13 (1998) 3225 [hep-ph/9808217] [SPIRES].ADSGoogle Scholar
  59. [59]
    A. Bartl, T. Kernreiter and W. Porod, A CP sensitive asymmetry in the three-body decay stop 1btau + tau sneutrino, Phys. Lett. B 538 (2002) 59 [hep-ph/0202198] [SPIRES].ADSGoogle Scholar
  60. [60]
    K. Kiers, A. Szynkman and D. London, CP violation in supersymmetric theories: stop 2stop 1 τ τ +, Phys. Rev. D 74 (2006) 035004 [hep-ph/0605123] [SPIRES].ADSGoogle Scholar
  61. [61]
    A. Szynkman, K. Kiers and D. London, CP violation in supersymmetric theories: stop 2stop 1 HH, stop 2stop 1 ZZ, stop 2stop 1 W + W , stop 2stop 1 ZH, Phys. Rev. D 75 (2007) 075009 [hep-ph/0701165] [SPIRES].ADSGoogle Scholar
  62. [62]
    M. Frank and I. Turan, CP asymmetry in charged Higgs decays to chargino-neutralino, Phys. Rev. D 76 (2007) 076008 [arXiv:0708.0026] [SPIRES].ADSGoogle Scholar
  63. [63]
    E. Christova, E. Ginina and M. Stoilov, Supersymmetry through CP-violation in H ±W ± h 0, JHEP 11 (2003) 027 [hep-ph/0307319] [SPIRES].CrossRefADSGoogle Scholar
  64. [64]
    H. Eberl, T. Gajdosik, W. Majerotto and B. Schrausser, CP-violating asymmetry in chargino decay into neutralino and W boson, Phys. Lett. B 618 (2005) 171 [hep-ph/0502112] [SPIRES].ADSGoogle Scholar
  65. [65]
    H. Eberl, S.M.R. Frank and W. Majerotto, CP violating asymmetry in stop decay into bottom and chargino, arXiv:0912.4675 [SPIRES].
  66. [66]
    A. Pilaftsis, Resonant CP-violation induced by particle mixing in transition amplitudes, Nucl. Phys. B 504 (1997) 61 [hep-ph/9702393] [SPIRES].CrossRefADSGoogle Scholar
  67. [67]
    J.R. Ellis, J.S. Lee and A. Pilaftsis, LHC signatures of resonant CP-violation in a minimal supersymmetric Higgs sector, Phys. Rev. D 70 (2004) 075010 [hep-ph/0404167] [SPIRES].ADSGoogle Scholar
  68. [68]
    J.R. Ellis, J.S. Lee and A. Pilaftsis, Resonant CP-violation in Higgsstrahlung at an e + e linear collider, Phys. Rev. D 72 (2005) 095006 [hep-ph/0507046] [SPIRES].ADSGoogle Scholar
  69. [69]
    M. Nagashima et al., CP violation in three-body chargino decays, Phys. Rev. D 80 (2009) 095012 [arXiv:0907.1063] [SPIRES].
  70. [70]
    H.K. Dreiner, O. Kittel and F. von der Pahlen, Disentangling CP phases in nearly degenerate resonances: neutralino production via Higgs at a muon collider, JHEP 01 (2008) 017 [arXiv:0711.2253] [SPIRES].CrossRefADSGoogle Scholar
  71. [71]
    O. Kittel and F. von der Pahlen, CP-violating Higgs boson mixing in chargino production at the muon collider, JHEP 08 (2008) 030 [arXiv:0806.4534] [SPIRES].CrossRefADSGoogle Scholar
  72. [72]
    G. Valencia, Constructing CP odd observables, hep-ph/9411441 [SPIRES].
  73. [73]
    G.C. Branco, L. Lavoura and J.P. Silva, CP violation, in Int. Ser. Monogr. Phys. volume 103, Oxford Univeristy Press, Oxford U.S.A. (1999) [SPIRES]Google Scholar
  74. [74]
    CMS collaboration, S. Abdullin et al., Discovery potential for supersymmetry in CMS, J. Phys. G 28 (2002) 469 [hep-ph/9806366] [SPIRES].ADSGoogle Scholar
  75. [75]
    ATLAS collaboration, ATLAS detector and physics performance. Technical design report. Volume 2, CERN-LHCC-99-15 [SPIRES].
  76. [76]
    LHC/LC Study Group collaboration, G. Weiglein et al., Physics interplay of the LHC and the ILC, Phys. Rept. 426 (2006) 47 [hep-ph/0410364] [SPIRES].CrossRefADSGoogle Scholar
  77. [77]
    A. Bartl, H. Fraas, T. Kernreiter and O. Kittel, T-odd correlations in the decay of scalar fermions, Eur. Phys. J. C 33 (2004) 433 [hep-ph/0306304] [SPIRES].ADSGoogle Scholar
  78. [78]
    P. Langacker, G. Paz, L.-T. Wang and I. Yavin, A T-odd observable sensitive to CP-violating phases in squark decay, JHEP 07 (2007) 055 [hep-ph/0702068] [SPIRES].CrossRefADSGoogle Scholar
  79. [79]
    G. Moortgat-Pick, K. Rolbiecki, J. Tattersall and P. Wienemann, Probing CP-violation with and without Momentum Reconstruction at the LHC, JHEP 01 (2010) 004 [arXiv:0908.2631] [SPIRES].CrossRefGoogle Scholar
  80. [80]
    A. Bartl, E. Christova, K. Hohenwarter-Sodek and T. Kernreiter, Triple product correlations in top squark decays, Phys. Rev. D 70 (2004) 095007 [hep-ph/0409060] [SPIRES].ADSGoogle Scholar
  81. [81]
    J. Ellis, F. Moortgat, G. Moortgat-Pick, J.M. Smillie and J. Tattersall, Measurement of CP-violation in stop cascade decays at the LHC, Eur. Phys. J. C 60 (2009) 633 [arXiv:0809.1607] [SPIRES].CrossRefADSGoogle Scholar
  82. [82]
    A. Bartl, E. Christova, K. Hohenwarter-Sodek and T. Kernreiter, CP asymmetries in scalar bottom quark decays, JHEP 11 (2006) 076 [hep-ph/0610234] [SPIRES].CrossRefADSGoogle Scholar
  83. [83]
    H.E. Haber, Spin formalism and applications to new physics searches, hep-ph/9405376 [SPIRES].
  84. [84]
    D. Atwood and A. Soni, Analysis for magnetic moment and electric dipole moment form-factors of the top quark via \( {e^{+} }{e^{-} } \to t\bar{t} \), Phys. Rev. D 45 (1992) 2405 [SPIRES].ADSGoogle Scholar
  85. [85]
    M. Diehl and O. Nachtmann, Optimal observables for the measurement of three gauge boson couplings in e + e W + W , Z. Phys. C 62 (1994) 397 [SPIRES].ADSGoogle Scholar
  86. [86]
    B. Grzadkowski and J.F. Gunion, Using decay angle correlations to detect CP-violation in the neutral Higgs sector, Phys. Lett. B 350 (1995) 218 [hep-ph/9501339] [SPIRES].ADSGoogle Scholar
  87. [87]
    O. Kittel, A. Bartl, H. Fraas and W. Majerotto, CP sensitive observables in chargino production and decay into a W boson, Phys. Rev. D 70 (2004) 115005 [hep-ph/0410054] [SPIRES].ADSGoogle Scholar
  88. [88]
    O. Kittel, CP violation in production and decay of supersymmetric particles, hep-ph/0504183 [SPIRES].
  89. [89]
    W. Beenakker, R. Hopker, M. Spira and P.M. Zerwas, Squark and gluino production at hadron colliders, Nucl. Phys. B 492 (1997) 51 [hep-ph/9610490] [SPIRES].ADSGoogle Scholar
  90. [90]
    T. Stelzer and W.F. Long, Automatic generation of tree level helicity amplitudes, Comput. Phys. Commun. 81 (1994) 357 [hep-ph/9401258] [SPIRES].CrossRefADSGoogle Scholar
  91. [91]
    E. Byckling and K. Kajantie, Particle kinematics, John Wiley& Sons, U.S.A. (1973).Google Scholar
  92. [92]
    S. Kawasaki, T. Shirafuji and S.Y. Tsai, Productions and decays of short-lived particles in e + e colliding beam experiments, Prog. Theor. Phys. 49 (1973) 1656 [SPIRES].CrossRefADSGoogle Scholar

Copyright information

© SISSA, Trieste, Italy 2010

Authors and Affiliations

  1. 1.School of Physics and AstronomyUniversity of ManchesterManchesterU.K.
  2. 2.Departamento de Física Teórica y del Cosmos and CAFPEUniversidad de GranadaGranadaSpain

Personalised recommendations