Final state interactions for B→VV charmless decays

Ladisa, Massimo; Laporta, V.; Nardulli, G.; Santorelli, Pietro

doi:10.1103/physrevd.70.114025

Cited by 82 publications

(39 citation statements)

References 34 publications

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“…Although the analysis of the φK * polarization anomaly by Colangelo, De Fazio and Pham (CDP) [78] is very similar to ours, their results are quite different form ours in some respects (see also [85] for a different analysis based on the Regge theory). First, in our case, the interference between short-distance and long-distance contributions is mild because the absorptive long-distance contribution is essentially "orthogonal" to the short-distance one (see Table IX).…”

Section: F Comparison With Other Workmentioning

confidence: 49%

Final state interactions in hadronicBdecays

2005

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There exist many experimental indications that final-state interactions (FSIs) may play a prominent role not only in charmful B decays but also in charmless B ones. We examine the final-state rescattering effects on the hadronic B decay rates and their impact on direct CP violation. The color-suppressed neutral modes such as B 0 → D 0 π 0 , π 0 π 0 , ρ 0 π 0 , K 0 π 0 can be substantially enhanced by long-distance rescattering effects. The direct CP -violating partial rate asymmetries in charmless B decays to ππ/πK and ρπ are significantly affected by final-state rescattering and their signs are generally different from that predicted by the short-distance approach. For example, direct CP asymmetry in B 0 → ρ 0 π 0 is increased to around 60% due to final state rescattering effects whereas the short-distance picture gives about 1%. Evidence of direct CP violation in the decay B 0 → K − π + is now established, while the combined BaBar and Belle measurements of B 0 → ρ ± π ∓ imply a 3.6σ direct CP asymmetry in the ρ + π − mode. Our predictions for CP violation agree with experiment in both magnitude and sign, whereas the QCD factorization predictions (especially for ρ + π − ) seem to have some difficulty with the data. Direct CP violation in the decay B − → π − π 0 is very small ( < ∼ 1%) in the Standard Model even after the inclusion of FSIs. Its measurement will provide a nice way to search for New Physics as in the Standard Model QCD penguins cannot contribute (except by isospin violation). Current data on πK modes seem to violate the isospin sum rule relation, suggesting the presence of electroweak penguin contributions. We have also investigated whether a large transverse polarization in B → φK * can arise from the final-state rescattering of D ( * )D ( * ) s into φK * . While the longitudinal polarization fraction can be reduced significantly from short-distance predictions due to such FSI effects, no sizable perpendicular polarization is found owing mainly to the large cancellations occurring in the processes B → D * sD → φK * and B → D sD * → φK * and this can be understood as a consequence of CP and SU(3) [CPS] symmetry. To fully account for the polarization anomaly (especially the perpendicular polarization) observed in B → φK * , FSI from other states or other mechanism, e.g. the penguin-induced annihilation, may have to be invoked. Our conclusion is that the small value of the longitudinal polarization in V V modes cannot be regarded as a clean signal for New Physics.

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Section: F Comparison With Other Workmentioning

confidence: 49%

Final state interactions in hadronicBdecays

2005

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“…An application of the Watson's theorem was first discussed in [17] and subsequently applied to other decay channels in [18] and [19]. We briefly review here the formalism.…”

Section: Final State Interactions and Regge Behaviormentioning

confidence: 99%

“…To avoid the arbitrariness of this procedure one can describe this class of FSI by charmed Regge trajectories. This approach was followed in [19] for B → ρρ, K * ρ, K * φ decays and can be easily extended to B → ππ; we refer to this paper for details. Let us only write down the expression of trajectories α D (t) and α D * (t).…”

Section: B Charming Penguinsmentioning

confidence: 99%

“…[19]. For the channel B → ππ we only have the I = 0 and I = 2 transition amplitudes; the decay amplitude B → π + π 0 is only I = 2.…”

Section: Final State Interactions and Regge Behaviormentioning

confidence: 99%

“…Elastic contributions to high energy scattering are dominated by the Pomeron exchange, while the inelastic channels get contributions from both Pomeron and Regge trajectories. Also charming penguins find a place in this scheme, provided one introduces also charmed Regge trajectories, as for example in the study performed in [19] for the charmless B decay into two light vector mesons.…”

Section: Introductionmentioning

confidence: 99%

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Role of Final State Interactions in the B Meson Decay Into Two Pions

Deandrea

Ladisa

Nardulli

et al. 2006

Int. J. Mod. Phys. A

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Semileptonic and nonleptonic decays of B c

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⋆⋆Summary. Using our relativistic constituent quark model we present results on the exclusive nonleptonic and semileptonic decays of the Bc-meson. The nonleptonic decays are studied in the framework of the factorization approximation. We calculate the branching ratios for a large set of exclusive nonleptonic and semileptonic decays of the Bc meson and compare our results with the results of other models.

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Final state interactions for B→VV charmless decays

Cited by 82 publications

References 34 publications

Final state interactions in hadronicBdecays

Final state interactions in hadronicBdecays

Role of Final State Interactions in the B Meson Decay Into Two Pions

Semileptonic and nonleptonic decays of B c

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