Coupled-channel final-state interactions through Reggeon exchange for

Żenczykowski, P.

doi:10.1016/s0370-2693(99)00806-0

Cited by 10 publications

(8 citation statements)

References 22 publications

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“…Around the charm mesons mass region there are many resonances. One might think that their contribution will appear in this decay mode, either as scalar resonance exchange like in [3] or as K * exchanges [3,7,10]. Within our framework they would appear as the next order contribution (O(p 5 )) in the chiral expansion .…”

Section: Resultsmentioning

confidence: 88%

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Nonfactorizable contributions to the decay modeD0→K0K0

2001

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We point out that the decay mode D 0 → K 0K 0 has no factorizable contribution. In the chiral perturbation language, treating D 0 as heavy, the O(p) contribution is zero. We calculate the nonfactorizable chiral loop contributions of order O(p 3 ). Then, we use a heavy-light type chiral quark model to calculate nonfactorizable tree level terms, also of order O(p 3 ), proportional to the gluon condensate. We find that both the chiral loops and the gluon condensate contributions are of the same order of magnitude as the experimental amplitude.

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Section: Resultsmentioning

confidence: 88%

“…[2,3,4,5,7]) this decay has been understood as a result of final state interactions (FSI). In the analysis of ref.…”

Section: Introductionmentioning

confidence: 99%

Nonfactorizable contributions to the decay modeD0→K0K0

2001

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“…For the isospin 1 and 2 they are of the same order as the resonance contributions but the corresponding overall driving terms are by an order of magnitude smaller than the isospin 0 term. Alternative Regge contributions were considered following papers [9], [21] and [22]. These do not change significantly the driving terms, the changes being much smaller than one degree in the effective mass range up to 1 GeV.…”

Section: Input Amplitudesmentioning

confidence: 99%

Elimination of ambiguities in ππ phase shifts using crossing symmetry

2003

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Roy's equations, which incorporate crossing symmetry of the ππ scattering amplitudes, are used to resolve the present ambiguity between two solutions for the scalar-isoscalar phase shifts below 1 GeV. It is shown that the "down-flat" solution satisfies well Roy's equations and consequently crossing symmetry while the other solution called "up-flat" does not and thus should be eliminated. * Unité de Recherche des Universités Paris 6 et Paris 7, associée au CNRS

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“…1(c); for the Regge model the corresponding expressions may be found in ref. [27]). Consequently, we will have three real parameters: Red, Imd, Rec.…”

Section: Size Of Rescattering Effects and B → Kk Decaysmentioning

confidence: 99%

Elastic and inelastic SU(3)-breaking final-state interactions inBdecays to pseudoscalar mesons

Żenczykowski

Lach

2004

Phys. Rev. D

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We discuss all contributions from the Zweig-rule-satisfying SU͑3͒-breaking final state interactions ͑FSIs͒ in the B→ PP decays ͑neglecting charmed intermediate states͒, where PPϭ, K, KK , (Ј), and K(Ј). First, the effects of SU͑3͒ breaking in rescattering through Pomeron exchange are studied. Then, after making a plausible assumption concerning the pattern of SU͑3͒ breaking in non-Pomeron FSIs, we give general formulas for how the latter modify short-distance ͑SD͒ amplitudes. In the SU͑3͒ limit, these formulas depend on three effective parameters characterizing the strength of all non-Pomeron rescattering effects. We point out that the experimental bounds on the B→K ϩ K Ϫ branching ratio may limit the value of only one of these FSI parameters. Thus, the smallness of the B→K ϩ K Ϫ decay rate does not imply negligible rescattering effects in other decays. Assuming a vanishing value of this parameter, we perform various fits to the available B→ PP branching ratios. The fits determine the quark-diagram SD amplitudes, the two remaining FSI parameters and the weak angle ␥. While the set of all B→ PP branching ratios is well described with ␥ around its expected standard model ͑SM͒ value, the fits permit other values of ␥ as well. For a couple of such good fits, we predict asymmetries for the B→K, ϩ (Ј), K ϩ (Ј) decays as well as the values of the CP-violating parameters S and C for the time-dependent rate of B 0 (t)→ ϩ Ϫ . Apart from a problem with the recent B ϩ → ϩ asymmetry measurement, comparison with the data seems to favor the values of ␥ in accordance with SM expectations.

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Coupled-channel final-state interactions through Reggeon exchange for

Cited by 10 publications

References 22 publications

Nonfactorizable contributions to the decay modeD0→K0K0

Nonfactorizable contributions to the decay modeD0→K0K0

Elimination of ambiguities in ππ phase shifts using crossing symmetry

Elastic and inelastic SU(3)-breaking final-state interactions inBdecays to pseudoscalar mesons

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