Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2012-04-02
Physics
High Energy Physics
High Energy Physics - Phenomenology
35 pp
Scientific paper
We analyze the bounds on the spectrum of composite Higgs models (CHM) that come from flavor observables, by means of simple two-site effective Lagrangians, which incorporate a custodial symmetry and a Left-Right parity and which could also be adopted in further phenomenological studies on CHM. We derive, in particular, an important constraint on the masses of the heavy fermions which does not depend on the flavor structure of the sector beyond the SM. This bound is obtained from the infrared contribution to b\to s\gamma\ induced by the flavor-conserving effective vertex Wt_Rb_R. We find that the presence of a custodial symmetry can play a role in protecting this effective coupling and, as a consequence, in attenuating the constraint. In addition to this bound, we calculate the constraints from the "ultraviolet" contribution to b\to s\gamma, induced by loops of heavy fermions, and to \epsilon^{'}/\epsilon_K.
No associations
LandOfFree
ΔF=1 constraints on composite Higgs models with LR parity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with ΔF=1 constraints on composite Higgs models with LR parity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ΔF=1 constraints on composite Higgs models with LR parity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-510417