1. Probing the R-parity Violating Supersymmetry Effects in
Ru-Min Wang
Henan Normal University
Huazhong Normal University
In collaboration with:
Yuan-Guo Xu & Ya-Dong Yang
Oct 28, 2006, Guilin

2. Outline
Motivation
Theoretical input
summary
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3. Motivation
FCNC transitions are sensitive to NP contr-ibutions, especially in b->s transitions
New physics will be chased at LHC in loop B decays.

4. Previous analysis of NP We try to calculate RPV SUSY effects .
The two-Higgs doublet model (2HDM)
Yuan-Ben Dai et al, Phys.Lett.B390,257(1997).
Chao-Shang Huang et al., Phys.Rev.D63,114021(2001).
C. Bobeth et al, Phys.Rev.D64,074014(2001).
G. Erkol and G. Turan, Nucl.Phys.B635,286(2002).
S. Schilling et al., Phys.Lett.B616,93(2005).
The supersymmetric model (SUSY)
A. Ali et al., Phys.RevD61,074024(2000).
E. Lunghi et al., Nucl.Phys. B568,120(2000).
D. A. Demir et al, Phys.Rev. D66,034015(2002).
Chao-Shang Huang and Xiao-Hong Wu, Nucl.Phys.B657,304(2003).
S. R. Choudhury et al, Phys.Rev. D69,054018(2004).
The top quark two-Higgs doublet model (T2HDM)
Zhen-jun Xiao and Lin-xia Lu, Phys. Rev.D74,034016(2006).
We try to calculate RPV SUSY effects .

5. Using the latest data to obtain the new upper limits on the relevant RPV couplings.
Using the constrained RPV couplings to examine the RPV effects on
Comparing the SM predictions with the RPV predictions about

6. Outline
Motivation
Theoretical input
Summary
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7. The Standard Model
=u,d
EM,Z0 penguins
W box

9. A.Ali et al., Phys.Rev.D61,074024(2000).

10. R-parity Violating SUSY
S is the particle spin B is the baryon number L is the lepton number
R-parity violating superpotential:
: Yukawa couplings i, j,k : generation indices C : charge conjugate field

11. Feynman diagrams in RPV SUSY
sneutrino exchange squark exchange s-channel t-channel

12. Effective Hamiltonian in RPV SUSY
squark exchange sneutrino exchange sneutrino exchange

18. Outline
Motivation
Theoretical input
Summary
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hep-ph/

19. Experimental data

20. To constrain RPV couplings
The experimental data of the branching ratios
constrain
The relevant RPV coupling products

21. Constraned parameter spaces

22. Upper limits
from RPV mSUGRA
at MGUT scale

23. RPV SUSY predictions
predict

24. Regions of predictions
squark exchange sneutrino exchange

25. Features of the numerical results

26. l=e [0.00,0.29] , l=mu [0.02,0.76]
Phys.Rev.D73,092001(2006).
Phys.Rev.Lett.96,092001(2006).

27. <=0.76
<=0.29

28. 2x10^-7
10^-7

29. 2x10^-7
10^-7

30. Outline
Motivation
Theoretical input
Summary
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31. Summary Derived new upper bounds on relevant RPV couplings with
the latest experimental data of their branching ratios.
These predictions could be tested at LHC.

32. Thanks!