A quark model calculation of γγ→ππ including final-state interactions
نویسندگان
چکیده
منابع مشابه
Final-State Interactions in Heavy Quark Decays
We study the role played by the final-state interactions (fsi) in heavy quark decays using Pomeron and Regge exchanges to describe high energy scattering. At center of mass energy √ s ∼ 5GeV , Pomeron dominance does not apply. We study the behavior of the decay amplitudes as √ s is varied close to the B mass. We also investigate the behavior of the decay amplitude as √ s → ∞. Our conclusion is ...
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Strong final state interaction (FSI) effects can play a central role in the Standard Model prediction of weak K → 2π matrix elements. Here, I discuss how FSI's affect the direct CP violation parameter ε ′ /ε by solving the Omnès problem for the necessary K → 2π amplitudes. The main results of this analysis have been reported in a previous paper 1 and are further discussed in Refs. 2,3. The resu...
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I discuss the rôle of strong final state interactions (FSI) in K → 2π decays. In this case strong FSI effects can be resummed [1,2] by solving the Omnès problem for K → 2π amplitudes. Implications for the CP conserving ∆I = 1/2 ratio and the direct CP violation parameter ε ′ /ε are also discussed.
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The recent BaBar measurement has confirmed substantial strong phases for the B → J/ψK∗ decay amplitudes implying violation of factorization in this decay mode. In the absence of polarization measurement of a lepton pair from J/ψ, however, the relative phases of the spin amplitudes still have a twofold ambiguity. In one set of the allowed phases the s-quark helicity conserves approximately despi...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2000
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.61.025203