ep - p h / 97 04 24 4 v 1 5 A pr 1 99 7 Flavour changing top decays in supersymmetric extensions of the standard model
نویسنده
چکیده
Flavour changing top decays t → cZ0, t → cg and t → cγ are predicted with invisible rates within the standard model and may represent a window on new physics. We consider these processes in supersymmetric extensions of the standard model and we show that observable rates can be obtained only if the SUSY breaking is non universal and flavour dependent.
منابع مشابه
ar X iv : h ep - p h / 04 06 26 4 v 1 2 3 Ju n 20 04 IPPP / 04 / 05 DCTP / 04 / 10 Top flavour violating decays in general supersymmetric models
We analyse the top flavour violating decays in general supersymmetric model using the mass insertion approximation. In particular, we discuss the impact of a light right-handed top-squark and large mixing between the first or second and third generation of up-squarks on processes as t → qγ, g. We also take into account the relevant experimental constraints from B-physics and the requirements fo...
متن کاملar X iv : h ep - p h / 97 09 25 3 v 1 5 S ep 1 99 7 Higgs Particle Decays in Supersymmetry 1
We present a detailed study of the decays of the Higgs bosons H, H, and A within the Minimal Supersymmetric Standard Model including SUSY–QCD corrections. We find that the supersymmetric modes t̃ ̄̃ b (t̃̄t̃, and for large tanβ b̃ ̄̃ b) can dominate the H (H, A) decays in a wide range of the model parameters due to the large Yukawa couplings and mixings of t̃ and b̃. Compared to the conventional modes H →...
متن کاملX iv : h ep - p h / 93 04 27 8 v 1 2 1 A pr 1 99 3 The vacuum structure in a supersymmetric gauged
The vacuum structure in a supersymmetric gauged Nambu-Jona-Lasinio model. Abstract The dynamical breakdown of the SU (2) × U (1) symmetry triggered by a top-antitop condensate is studied in a supersymmetric version of the gauged Nambu-Jona-Lasinio model. An effective potential approach is used to investigate the vacuum structure and the equivalence with the minimal supersymmetric standard model...
متن کاملar X iv : h ep - p h / 01 04 15 9 v 1 1 7 A pr 2 00 1 Probing new physics in rare charm processes 1
We explore the sensitivity of the flavour changing neutral currents among c and u quarks in the context of the Minimal Supersymmetric Standard Model. The standard model rate for c → uγ can be enhanced by up to two orders of magnitudes in general MSSM, while the c → ul + l − rate can be enhanced by at most a factor of three. The most suitable hadronic observable to probe the c → uγ transition is...
متن کاملar X iv : h ep - p h / 97 04 33 1 v 1 1 5 A pr 1 99 7 EFI - 97 - 18 hep - ph / 9704331 April 1997 NEW DEVELOPMENTS IN PRECISION ELECTROWEAK
Our picture of the electroweak interactions continues to improve, with ever more precise constraints on the masses of the Higgs boson(s) and on non-standard physics. Some recent developments include: (a) a calculation of higher-order effects on the weak mixing angle which reduces scheme-dependence, (b) a long-awaited improvement in the experimental accuracy of measurement of parity violation in...
متن کامل