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Exploring CP violation in the MSSM.

  • Arbey A Université de Lyon, Université Lyon 1, Centre de Recherche Astrophysique de Lyon, CNRS, UMR 5574, 69561 Saint-Genis Laval Cedex, France ; Ecole Normale Supérieure de Lyon, Lyon, France ; Theory Division, CERN, 1211 Geneva 23, Switzerland.
  • Ellis J Theory Division, CERN, 1211 Geneva 23, Switzerland ; Theoretical Particle Physics and Cosmology Group, Department of Physics, King's College London, London, WC2R 2LS UK.
  • Godbole RM Centre for High Energy Physics, Indian Institute of Science, Bangalore, 560012 India.
  • Mahmoudi F Université de Lyon, Université Lyon 1, Centre de Recherche Astrophysique de Lyon, CNRS, UMR 5574, 69561 Saint-Genis Laval Cedex, France ; Ecole Normale Supérieure de Lyon, Lyon, France ; Theory Division, CERN, 1211 Geneva 23, Switzerland ; Institut Universitaire de France, 103 boulevard Saint-Michel, 75005 Paris, France.
  • 2015-04-04
Published in:
  • The European physical journal. C, Particles and fields. - 2015
English We explore the prospects for observing CP violation in the minimal supersymmetric extension of the Standard Model (MSSM) with six CP-violating parameters, three gaugino mass phases and three phases in trilinear soft supersymmetry-breaking parameters, using the CPsuperH code combined with a geometric approach to maximise CP-violating observables subject to the experimental upper bounds on electric dipole moments. We also implement CP-conserving constraints from Higgs physics, flavour physics and the upper limits on the cosmological dark matter density and spin-independent scattering. We study possible values of observables within the constrained MSSM (CMSSM), the non-universal Higgs model (NUHM), the CPX scenario and a variant of the phenomenological MSSM (pMSSM). We find values of the CP-violating asymmetry [Formula: see text] in [Formula: see text] decay that may be as large as 3 %, so future measurements of [Formula: see text] may provide independent information about CP violation in the MSSM. We find that CP-violating MSSM contributions to the [Formula: see text] meson mass mixing term [Formula: see text] are in general below the present upper limit, which is dominated by theoretical uncertainties. If these could be reduced, [Formula: see text] could also provide an interesting and complementary constraint on the six CP-violating MSSM phases, enabling them all to be determined experimentally, in principle. We also find that CP violation in the [Formula: see text] and [Formula: see text] couplings can be quite large, and so may offer interesting prospects for future [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] colliders.
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  • English
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gold
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https://sonar.ch/global/documents/212564
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