Tau-Sleptons and Tau-Sneutrino in the MSSM with Complex Parameters

Abstract

We present a phenomenological study of tau-sleptons stau_1,2 and tau-sneutrino in the Minimal Supersymmetric Standard Model with complex parameters A_tau, mu and M_1. We analyse production and decays of stau_1,2 and tau-sneutrino at a future e^+ e^- collider. We present numerical predictions for the important decay rates, paying particular attention to their dependence on the complex parameters. The branching ratios of the fermionic decays of stau_1 and tau-sneutrino show a significant phase dependence for tan(beta) < 10. For tan(beta) > 10 the branching ratios for the stau_2 decays into Higgs bosons depend very sensitively on the phases. We show how information on the phase phi(A_tau) and the other fundamental stau parameters can be obtained from measurements of the stau masses, polarized cross sections and bosonic and fermionic decay branching ratios, for small and large tan(beta) values. We estimate the expected errors for these parameters. Given favorable conditions, the error of A_tau is about 10% to 20%, while the errors of the remaining stau parameters are in the range of approximately 1% to 3%. We also show that the induced electric dipole moment of the tau-lepton is well below the current experimental limit.

LaTex, 25 pages, 11 figures (included); v2: extended discussion on error determination, version to appear in Phys.Rev.D

Cited by in corpus (33)

• Precise determination of the neutral Higgs boson masses in the MSSM
• Physics Impact of a Precise Determination of the Top Quark Mass at an e+e- Linear Collider
• CP asymmetries in neutralino production in e+e- collisions
• Discovery potential of radiative neutralino production at the ILC
• Fermion polarization in sfermion decays as a probe of CP phases in the MSSM
• A T-odd asymmetry in neutralino production and decay
• Top Squarks and Bottom Squarks in the MSSM with Complex Parameters
• Impact of CP phases on stop and sbottom searches
• A CP asymmetry in e^+e^- \to χ^0_iχ^0_j \to χ^0_j τstau_k with tau polarization
• CP violation in selectron cascade decays e_L -> e X_2^0 -> e X_1^0 mu+ mu-
• Measurement of CP Violation in Stop Cascade Decays at the LHC
• CP sensitive observables in chargino production and decay into a W boson
• CP violation in chargino production and decay into sneutrino
• Probing SUSY CP Violation in Two-Body Stop Decays at the LHC
• Triple product correlations in top squark decays
• CP-violating asymmetry in chargino decay into neutralino and W boson
• CP asymmetries in scalar bottom quark decays
• Heavy Scalar Tau Decays in the Complex MSSM: A Full One-Loop Analysis
• Electron Electric Dipole Moment from Lepton Flavor Violation
• CP observables with spin-spin correlations in chargino production
• Impact of SUSY CP Phases on Stop and Sbottom Decays in the MSSM
• Scalar Neutrinos at the LHC
• Disentangling CP phases in nearly degenerate resonances: neutralino production via Higgs at a muon collider
• Normal tau polarisation as a sensitive probe of CP violation in chargino decay
• Testing the CP-violating MSSM in stau decays at the LHC and ILC
• Measurement of CP asymmetries in neutralino production at the ILC
• Impact of slepton generation mixing on the search for sneutrinos
• Higgs boson interference in mu^+ mu^- ->chargino_i chargino_j with longitudinally polarized beams
• Supersymmetry Parameter Analysis
• Interference of Higgs boson resonances in mu^+ mu^- -> neutralino_i neutralino_j with longitudinal beam polarization
• Supersymmetry Working Group: Summary Report
• Impact of slepton generation mixing on the search for sneutrinos - Lepton flavour violation in sneutrino production and decays in the general MSSM
• Impact of CP phases on SUSY particle production and decays