Download presentation

Presentation is loading. Please wait.

Published byFelix Bradford Modified over 3 years ago

1
Chuan-Hung Chen Department of Physics, National Cheng-Kung U., Tainan, Taiwan seminar@cycu.11.21.06.tw Introduction & Motivation Higgs-mediated LFV Implications of LFV in tau decays Speculation of Higgs-mediated effects

2
What we can learn from B factories: Introduction & Motivation CP violations: time-dependence CP asymmetry & direct CP violation ICHEP2006: 1 with b s Penguins

4
Determine the parameters of CKM matrix elements, or f B Test QCD theories: PQCD, QCDF, final state interactions etc.

5
Probe flavor structures:

7
Future tau ( ) physics B-factory: 1 ×10 9 Super-B: 100 ×10 9 CLEO-c: 10 ×10 6 BES-III: 100 ×10 6

8
results up to 2005 mode x10 -7 mode x10 -7 BaBar0.68 lll 1.1-3.5 ee Belle3.1 e e BaBar1.1 Belle1.5 e e Belle1.9 ee Belle2.4 lhh BaBar0.7-4.8 ' Belle10 BaBar0.7 e'e' Belle4.7 lV0lV0 CLEO20-75 Belle4.1 e 0 CLEO20 ee Belle1.9 Ks CLEO9.5 Belle1.4 e Ks CLEO9.1 Belle0.72

9
mode x10 -7 mode x10 -7 Belle0.45 lll 1.1-3.5 ee BaBar1.1 +ee+ee BaBar1.1 Belle0.65 ee+ee+ Belle1.9 ee Belle0.92 lhh BaBar0.7-4.8 ' Belle1.3 ++ BaBar0.7 e'e' Belle1.6 lV0lV0 Belle2.0-7.7 Belle1.2 0 Belle2.0 ee Belle0.80 BaBar0.59 Ks Belle0.52 BaBar0.58 e Ks Belle0.60 BaBar0.72 BaBar1.5

11
Lepton flavor violation (LFV) quark flavor changing via charged current; charged weak current is written as In terms of physical eigenstates By Wolfenstein parametrization

12
In the standard model (SM), the flavor changing neutral currents (FCNCs) arise from loop Rear decays induced from loop will be sensitive to new physics. In the SM, since neutrinos are massless, there are no flavor violations in lepton sector According to observed neutrino oscillations, we know that neutrinos have masses so that Maki-Nakagawa-Suzuki-Pontecorvo (MNSP)

13
Higgs-mediated LFV Nonzero neutrino masses are definite. It is found that seesaw mechanism, by introducing singlet right-handed Majorana neutrinos, is one of natural ways to solve the tiny neutrino masses which are less than a few eV. In non-SUSY models, the effects of LFV are suppressed by 1/M R which is around GUTs scale 10 15 GeV. However, in models with SUSY, due to the right-handed Majorana introduced, the flavor conservation in the slepton sector at unified scale will be violated at the M R scale via renormalization. Borzumati, Masiero, PRL57,961; Hall, Rattazzi, Sarid, PRD50,7048;Babu, Kolda, PRL89,241802

14
Babu & Kolda’s mechanism for lepton flavor violation nonholomophic terms

15
At large tan ~ mt/mb, or cos << 1, the Higgs-mediated LFV will be enhanced

16
Implications of LFV in decays ( , 3 , , KK) induced by slepton mixings with large tan Due to slepton mixings

18
LFV with Higgs-mediated nonholomophic terms Y: diagonalized Yukawa matrix of leptons Due to nonholomophic effects, is not diagonal matrix Since 2 are loop effects, they are much less than 1, the LFV can be regarded as a leading expansion of 2 I ij

19
Employ the physical mass eigenstates of the Higgses The interactions for the LFV via the Higgs-mediated mechanism are expressed by

20
Since the LFVs in and decay are driving by the same mechanism, to simplify the discussions, we take M 1 ~M 2 ~m 0 ~ ~ M U ~ 10 19 GeV, M R ~ 10 14 GeV tan =60 BR< (3.1, 0.68) 10 7

21
A s s , ’ =39.3 0 f s =0.17 GeV m ss =0.69 GeV

22
h, H s s = 30 0, m s = 0.15 GeV, decoupling limit: /2

23
h, H cs: cos( - )sin ; sc=sin( - )cos decoupling limit: /2 A

24
h, H K K v=2.87 GeV, =-10.4 GeV 4 Cheng,Chua, Soni, PRD72,094003

25
Speculation of Higgs-mediated effects In terms of squark mixings, Babu,Kolda, PRL84,228(00)

26
It is interesting to examine the effects on B decays Charged Higgs on B Higgs-mediated on

Similar presentations

OK

Rare B Decays Chris Parkes SUPA Postgraduate Lectures Introduction Radiative decays b s b d Electroweak Penguin b sl + l - Rate Forward backward.

Rare B Decays Chris Parkes SUPA Postgraduate Lectures Introduction Radiative decays b s b d Electroweak Penguin b sl + l - Rate Forward backward.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on power generation using speed breaker Gyno appt on period Ppt on waxes structure Ppt on interest rate futures Download ppt on reduce reuse recycle Maths ppt on circles class 10 Ppt on team building skills Ppt on carpooling system Free ppt on mobile number portability idea Ppt on public speaking tips