Recent developments on the CKM matrix

Wang, Wei

doi:10.1142/s0217751x14300403

Cited by 15 publications

(10 citation statements)

References 364 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, by considering the observations made by early experiments [4,5] that the low mass ππ and Kπ region is dominated by the elastic regime, the number of coupled channel expected for charmless three-body B decays should be very restricted. There is a significant exception to this general picture for the two-body mass distribution: the S-wave ππ → KK re-scattering process between 1 to 1.6 GeV [6,7], that was also discussed in detail in our previous paper. So, at least for this class of decays, the existence of few possibilities of coupled hadronic channels demands the explicit consideration of the important constraint from CPT invariance in the study of CP violation.…”

Section: Introductionmentioning

confidence: 83%

CPviolation: Dalitz interference,CPT, and final state interactions

et al. 2015

View full text Add to dashboard Cite

Resonances and final state interactions (FSI) play a role in the formation of CP violation (CPV) constrained by CPT invariance. We provide a general formulation of CPV including resonances and FSI starting from the CPT constraint. Our discussion is elaborated within a simple B decay model with the ρ and f0(980) resonances plus a non resonant background including the ππ → KK coupled amplitude. We consider few illustrative examples to show the interference patterns appearing in the CP asymmetry, namely, that from the ρ resonance plus a non-resonant amplitude, and that from the interference of the ρ and f0 (980) resonances. We perform the fit of the CP asymmetry for the charmless three-body B

show abstract

Section: Introductionmentioning

confidence: 83%

CPviolation: Dalitz interference,CPT, and final state interactions

et al. 2015

View full text Add to dashboard Cite

show abstract

“…To determine the values of c 0 and c 2 , we work in the spirit of taking those short-distance coefficients to be insensitive to the long-distance hadronic dynamics. As a convenient choice, one can replace the physical B − c meson by a freecb pair of the quantum number 1 S [1] 0 , so that both the full amplitude,…”

Section: Perturbative Matchingmentioning

confidence: 99%

“…where the factor √ 2N c is due to the spin and color factors of the normalizedcb( 1 S [1] 0 ) state. The computation of these matrix elements to O(α s ) will be addressed in Sect.…”

Section: Perturbative Matchingmentioning

confidence: 99%

See 1 more Smart Citation

Radiative leptonic $$B_c\rightarrow \gamma \ell {\bar{\nu }}$$ B c → γ ℓ ν ¯ decay in effective field theory beyond leading order

Wang

Zhu

2015

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

We study the radiative leptonic B c → γ ν decays in nonrelativistic QCD effective field theory, and we explore the contribution from a fast-moving photon. As a result, interactions between the photon and the heavy quarks can be integrated out, resulting in the factorization formula for the decay amplitude. We calculate not only the relevant short-distance coefficients at leading order and next-toleading order in α s , but also the nonrelativistic corrections at the order |v| 2 in our analysis. We find that the QCD corrections can significantly decrease the branching ratio, and this is of great importance in extracting the long-distance operator matrix elements of B c . For phenomenological application, we present our results for the photon energy, lepton energy and lepton-neutrino invariant mass distribution.

show abstract

“…• The normalization conditions It will be interesting to inspect the rapidity resummation effect for phenomenological observables which are relevant for the precision test of CKM mechanism (for recent reviews, see [16,17]) and for the hunting of beyond standard model physics. In this respect, we consider the B → π transition form factors f ± Bπ (q 2 ) at large hadronic recoil as illuminative examples, which are essential to the goldenchannel determination of matrix element |V ub | exclusively.…”

Section: Resummation Improved B-meson Tmd Wave Functionsmentioning

confidence: 99%

Rapidity resummation forB-meson wave functions

Shen

Wang

2014

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. Transverse-momentum dependent (TMD) hadronic wave functions develop light-cone divergences under QCD corrections, which are commonly regularized by the rapidity ζ of gauge vector defining the non-light-like Wilson lines. The yielding rapidity logarithms from infrared enhancement need to be resummed for both hadronic wave functions and short-distance functions, to achieve scheme-independent calculations of physical quantities. We briefly review the recent progress on the rapidity resummation for B-meson wave functions which are the key ingredients of TMD factorization formulae for radiative-leptonic, semi-leptonic and non-leptonic B-meson decays. The crucial observation is that rapidity resummation induces a strong suppression of B-meson wave functions at small light-quark momentum, strengthening the applicability of TMD factorization in exclusive B-meson decays. The phenomenological consequence of rapidityresummation improved B-meson wave functions is further discussed in the context of B → π transition form factors at large hadronic recoil.

show abstract

Recent developments on the CKM matrix

Cited by 15 publications

References 364 publications

CPviolation: Dalitz interference,CPT, and final state interactions

CPviolation: Dalitz interference,CPT, and final state interactions

Radiative leptonic $$B_c\rightarrow \gamma \ell {\bar{\nu }}$$ B c → γ ℓ ν ¯ decay in effective field theory beyond leading order

Rapidity resummation forB-meson wave functions

Contact Info

Product

Resources

About