CP violation in the top-quark system through light squarks

Abstract

We study a decay rate asymmetry of the top quark in the supersymmetric standard model, taking into account the constraints from the electric dipole moments of the neutron and the electron. One CP-violating phase contained in the mass-squared matrices of squarks and sleptons is allowed to have an unsuppressed value, even if their masses are of order 100 GeV. Sizable $CP$ violation could then occur in the production and decay of the top quark through interactions with top squarks. The asymmetry between the widths for the decays $t\to b{W}^{+}$ and $\bar{t}\to \bar{b}{W}^{-}$ can be of order $10^{-3}$, which will possibly be detectable in the near future.

18 pages, 5 figures

References in corpus (2)

• CP Violation In Single Top Production And Decay Via p p-bar -> t b-bar +X -> W^+ b b-bar +X Within The MSSM: A Possible Application For Measuring \arg(A_t) At Hadron Colliders
• Implications of baryon asymmetry for the electric dipole moment of the neutron

Cited by in corpus (8)

• CP Violation in Top Physics
• The Top Quark Decay Vertex in Standard Model Extensions
• CP asymmetry for radiative B-meson decay in the supersymmetric standard model
• A CP sensitive asymmetry in the three--body decay stop_1 -> b tau+ tau-sneutrino
• Decay rate asymmetry in $B\to X_s\gamma$ as a signature of supersymmetry
• Decay Rate Asymmetry of Top Squark
• CP violation in decays of the lightest supersymmetric particle with bilinearly broken R parity
• Decay rate asymmetry for $B\to X_s\gamma$ in SUSY model