Amplitude Analysis

Abstract

Even if a 'complete set' of experimental observables were measured for the elastic scattering or photo/electroproduction of pseudoscalar mesons, ambiguities would remain in the extracted partial-wave and isospin decomposed amplitudes. As these problems are not widely understood, the present work outlines the way model-dependence enters into analyses of data from both hadronic and electromagnetic facilities.

Proposal for studyingN*resonances with thep¯p→pWu1, Ouyang2, Zou3 2009Phys. Rev. C461560View full textAdd to dashboardCite

“…No corresponding peak has been observed from the πN invariant mass spectrum because of its nearby strong peak. A difficulty in extracting the N * information from these experiments is the isospin decompo-sition of 1/2 and 3/2 [18]. Recently, the J /ψ →NNπ and pp → pnπ + reactions have been used to study N * resonances with claimed observation of the Roper resonance peak [19,20] due to their isospin filter effect [21,22].…”

Role of the resonance in the reaction

“…Another difficulty in extracting the Roper resonance information from these experiments is the isospin decomposition of 1/2 and 3/2 [14]. In Refs.…”