Quark Mass Hierarchy, FCNC and CP violation in a Seesaw model

Details Quark Mass Hierarchy, FCNC and CP violation in a Seesaw model Quark Mass Hierarchy, FCNC and CP violation in a Seesaw model

1998-09-11

arxiv.org/abs/hep-ph/9809333v1

Prog.Theor.Phys. 101 (1999) 671-706

Physics

High Energy Physics

High Energy Physics - Phenomenology

42 pages, 13 figures, psfig.sty is required

Scientific paper

10.1143/PTP.101.671

The seesaw model of quark masses is studied systematically, focusing on its developments. A framework allowing the top quark mass to be of the order of the electroweak symmetry breaking scale, while the remaining light quarks have much smaller masses, due to the seesaw mechanism, is presented. The violation of the GIM mechanism is shown to be small and the tree level FCNC are suppressed naturally. In this model, there are many particles which could contribute to the FCNC in the one-loop level. Parameters of the model are constrained by using the experimental data on K^0-\bar{K}^0 mixing and \epsilon_K. The rare K meson decays K_{L,S} -> \pi^0 \nu \bar{\nu} and K^+ -> \pi^+ \nu \bar{\nu} are also investigated in the model. In these processes the scalar operators (\bar{s}d)(\bar{\nu}_{\tau}\nu_{\tau}), which are derived from box diagrams in the model, play an important role due to an enhancement factor M_K/m_s in the matrix element <\pi|\bar{s}d|K>. It is emphasized that the K_L decay process through the scalar operator is not the CP violating mode, so B(K_L -> \pi^0 \nu \bar{\nu}) remains non-zero even in the CP conserved limit. The pion energy spectra for these processes are predicted.

Affiliated with

Also associated with

No associations

Rating

Quark Mass Hierarchy, FCNC and CP violation in a Seesaw model 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 Quark Mass Hierarchy, FCNC and CP violation in a Seesaw model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quark Mass Hierarchy, FCNC and CP violation in a Seesaw model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-718969