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Rumin Wang G. R.. Lu& Y. D. Yang Work done in collaboration with G. R.. Lu & Y. D. Yang Huazhong Normal University Henan Normal University November 15,

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Presentation on theme: "Rumin Wang G. R.. Lu& Y. D. Yang Work done in collaboration with G. R.. Lu & Y. D. Yang Huazhong Normal University Henan Normal University November 15,"— Presentation transcript:

1 Rumin Wang G. R.. Lu& Y. D. Yang Work done in collaboration with G. R.. Lu & Y. D. Yang Huazhong Normal University Henan Normal University November 15, 2005, Beijing

2 2  Motivation  Theoretical input   Summary Outline

3 3 To solve the polarization anomaly To solve the puzzles Motivation for study

4 4 Decay amplitude of B to VV in helicity basis: Decay amplitudes in transversity basis: Longitudinal polarization fraction: ( ~0.9 in SM )

5 5  Tree + penguin : ( Sensitive to NP )  Pure penguin ( Sensitive to NP ) : ?? Surprise

6 6 Previous study  Kagan show increasing nonfactorizable contribution of annihilation diagram to solve anomaly by QCDF( hep-ph/ ). But H.n. Li & Mishima: annihilation contribution is not sufficient to lower f L down to 0.5 by PQCD ( PRD 71, ).  Polarization anomaly might be due to large charming penguin contributions and final-state-interactions (FSI) by Colangelo et al. & Ladisa et al. ( PLB 597,291; PRD 70, ). However, H. Y. Cheng et al. have found the FSI effects not able to fully account for this anomaly ( PRD 71, ).  We try to solve this anomaly including RPV SUSY effects.

7 7 To solve the polarization anomaly To solve the puzzles Motivation for study

8 8  1.5x10^(-6) 10^(-7)  4.6x10^(-6) 8.3x10^(-6)  ?

9 9  But But in Exp.  11.4x10^(-6) 6.0x10^(-6) ?

10 10 Previous study  Buras et al. point out B to pi pi can be nicely accommodated in the SM through nonfactorizable hadronic interference effects, whereas B to pi K system may indicate NP in the electroweak penguin sector (PRL 92,101804; NPB 697,133).  H. N. Li et al. & Y. D. Yang et al. study the next to leading order corrections by PQCD & QCDF, respectively. These higher order corrections may be important for Br(B to pi K), but the can not explain other experimental data( hep-ph/ ;PRD72, ). NP  We try to calculate RPV SUSY effects.

11 11  Motivation  Theoretical input   Summary Outline

12 12 Theoretical input The effective Hamiltonian in SM R-parity Violating SUSY QCD Factorization

13 13 The effective Hamiltonian in SM The effective weak Hamiltonian for B decays: Qi are local four-quark operators The decay amplitude in SM:

14 14 S is the particle spin B is the baryon number L is the lepton number R-parity violating superpotential: R-parity Violating SUSY : Yukawa couplings i, j,k : generation indices C : charge conjugate field

15 15  The four fermion effective Hamiltonians due to the exchanging of the sleptons:  The effective Hamiltonians due to the exchanging of the squarks:

16 16 R-parity Violating decay amplitude:

17 17 The total decay amplitude: Naïve factorization, Generalized factorization, QCD factorization, Perturbative QCD, Light-cone QCD sum rules, Lattice QCD, Soft-collinear effective theory, etc.

18 18 BBNS approach: PRL 83: ,1999 NPB 591: , 2000 Naïve Factorization: QCD Factorization: QCD Factorization

19 19  Motivation  Theoretical input   Summary Outline

20 20 Based on paper: Phys.Rev.D72:015009(2005)

21 21 Longitudinal polarization Polarization Anomaly !! RPV SUSY ?

22 22

23 23

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26 26 The polarization anomaly could be solved by RPV effects.

27 27  Motivation  Theoretical input   Summary Outline

28 28 Based on paper: hep-ph/

29 29 Branching ratios Puzzle !!

30 30 Direct CP asymmetries Puzzle !! RPV SUSY ?

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35 35

36 36  Motivation  Theoretical input   Summary Outline

37 37 Summary Employed QCDF to study RPV SUSY effects in following modes: o Polarization in B to VV. o Branching ratios & direct CP asymmetry in B to pi pi, pi K. RPV couplings can give a possible solution to the puzzles. Obtain the ranges of RPV couplings, but these are very narrow. The allowed spaces constrained by B to PP are consistent with these by B to VV decays. An explanation is need: o SM is in no way ruled out. o Existence of New Physics. o Many more measurement are in progress.

38 38

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40 40

41 41 R-parity Violating decay:

42 42 Ratios of branching ratios

43 43 Branching ratios


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