Crossing and physical partial-wave amplitudes
نویسندگان
چکیده
منابع مشابه
Partial-wave amplitudes and multiparticle production
Recursion relations for integrals of amplitudes over the phase space, i.e. for partial wave amplitudes, are introduced. In their simplest form these integrals are proportional to the s-wave amplitudes and represent rigorous lower bounds on the total cross sections. The connection with classical field equations in D dimensions is established. Previous results on multiparticle amplitudes are easi...
متن کاملPartial wave decomposition of pion and photoproduction amplitudes
Partial wave amplitudes for production and decay of baryon resonances are constructed in the framework of the operator expansion method. The approach is fully relativistically invariant and allow us to perform combined analyses of different reactions imposing directly analyticity and unitarity constraints. All formulas are given explicitly in the form used by the Crystal Barrel collaboration in...
متن کاملDips in partial wave amplitudes from final state interactions.
We consider the dip-peak structures in the J=0 partial wave amplitudes for processes γγ → WW and γγ, gg → tt taking into account the corresponding Born term process and the rescattering process where the intermediate state is rescattered through the exchange of Higgs resonance state in the direct channel. Near a direct channel resonance, final state interactions can be important even for relati...
متن کاملUnitarized ChPT Amplitudes and Crossing Symmetry Violation
Pion-pion scattering amplitude obtained from one-loop Chiral Perturbation Theory (ChPT) is crossing symmetric, however the corresponding partial-wave amplitudes do not respect exact unitarity relation. There are different approaches to get unitarized results from ChPT. Here we consider the inverse amplitude method (IAM) and, using the Roskies relations, we measure the amount of crossing symmetr...
متن کاملCrossing symmetry in the ππ D - and F - wave scattering amplitudes and new precise results for the S - wave amplitude ∗
Recently presented new-one subtracted dispersion relations with imposed crossing symmetry condition for the ππ Sand P-wave scattering amplitudes and the well known Roy’s equations with two subtractions have led to a set of many partial wave amplitudes in very wide energy range [1]. They allow e.g. for a very precise and unambiguous determination of scattering lengths and parameters of the f0(60...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Il Nuovo Cimento A
سال: 1972
ISSN: 0369-3546,1826-9869
DOI: 10.1007/bf02832836