45,941 research outputs found
Source of CP Violation for the Baryon Asymmetry of the Universe
We give a description of why the existence of a fourth generation is likely
to provide enough CP violation for baryogenesis, and trace how this observation
came about. We survey the current experimental and theoretical pursuits and
outline a research agenda, touching upon unitarity violation and very heavy
chiral quarks, and comment on how the electroweak phase transition picture
might be altered.Comment: Invited talk presented at 2nd International Workshop on Dark Matter,
Dark Energy and Matter-antimatter Asymmetry, Hsinchu, Taiwan, November 5-6,
201
Heavy QQ(bar) "Fireball" Annihilation to Multiple Vector Bosons
Drawing analogy of replacing the nucleon by heavy chiral quark , the pion
by Goldstone boson , and coupling by coupling, we construct a
statistical model for annihilation, i.e. into longitudinal
weak bosons. This analogy is becoming prescient since the LHC direct bound GeV implies strong Yukawa coupling. Taking TeV, the
mean number ranges from 6 to over 10, with negligible two or three
boson production. With individual or decays suppressed either by
phase space or quark mixing, and given the strong Yukawa coupling, is the likely outcome for very heavy production at the LHC.Comment: 4 pages, 1 figur
Fourth Generation -- Towards Effect of Large Yukawa Coupling
In this talk we cover two threads regarding the 4th generation: on CP
violation, from Earth up to the Heavens, i.e. from accelerator-based
experimental studies, towards baryon asymmetry of the Universe; and on direct
search bounds on and , towards the possibility of electroweak
symmetry breaking through large Yukawa couplings. Prospects and discussions are
presented.Comment: Plenary talk presented at TOP2010, May 31 - June 4, 2010, Bruges,
Belgiu
What Can We Learn from Charmless Rare B Decays - the Past/Next 3 Years
A personal perspective is given on physics of charmless rare B decays: 1997
-- 2003.Comment: 6 pages, 2 eps figures included. Invited talk presented at joint
session of the 8th Asia Pacific Physics Conference (APPC 2000) and 3rd ACFA
Workshop on Physics/Detector at the Linear Collider (ACFA-LC3), Taipei,
Taiwan, August 200
Indications for Large Rescattering in Rare B Decays
The sign of , the evidence for , and the possibly sizable and in all suggest that final state rescattering may be needed in
decay, which is echoed by large color suppressed modes. An SU(3) formalism of rescattering in final states leads to interesting predictions, in
particular allowing for small .Comment: 3 pages, 3 figures. Talk presented at EPS2003 Conference, Aachen,
Germany, July 200
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