Finite temperature effects onCP-violating asymmetries

Finite temperature effects on CP violating asymmetries

We compute the CP violating decay asymmetries relevant for baryogenesis scenarios involving the out of equilibrium decays of heavy particles, including the finite temperature effects arising from the background of light thermal particles which are present during the decay epoch. Thermal effects can modify the size of CP violation by a sizeable fraction in the decay of scalar particles, but we f...

Parity-violating electromagnetic interactions in QED3 at finite temperature

We study the parity-breaking terms generated by the box diagram in 2+1 dimensional thermal QED. These lead, in the long wave limit, to a gauge invariant extensive action which behaves as 1/T at high temperature. In contrast, the effective action in the static limit involves leading non-extensive terms proportional to 1/T 3 at high temperature, which violate large gauge invariance. We derive a n...

Measurement of indirect CP - violating asymmetries in

D[superscript 0] K[superscript +]K[superscript ] and D[superscript 0] [superscript +][superscript ] decays at Citation Aaltonen, T., et al. "Measurement of indirect CP-violating asymmetries in D[superscript 0] K[superscript +]K[superscript ] and D[superscript 0] [superscript +][superscript ] decays at CDF. Article is made available in accordance with the publisher's policy and may be subject to...

Measurement of CP - Violating Asymmetries in the

Particle-width effect on CP-violating asymmetries.

CP -violating asymmetries calculated from the Breit-Wigner approximation for unstable particle propagators violate CPT . A formalism satisfying CPT invariance and unitarity is presented. Applications are given to t decays. For the decay t → bντ τ̄ in a class of CP -violating Higgs models the CP -violating asymmetry turns out to be 10−4 times smaller than the previously reported results. PACS#: 1...