6533b827fe1ef96bd12859b4

RESEARCH PRODUCT

Recent results from the MAID and Dubna-Mainz-Taipei PWA analysis

S.n. YangDieter DrechselS. S. KamalovL. Tiator

subject

PhysicsParticle physicsTransverse planePionAmplitudeSimplicity (photography)Nuclear TheoryIsobarResonanceHigh Energy Physics::ExperimentObservableNuclear ExperimentHelicity

description

The unitary isobar model MAID2007 has been developed to analyze the world data of pion photo- and electroproduction. The model contains both a common background and several resonance terms. The background is unitarized according to the K-matrix prescription, and the 13 four-star resonances with masses below 2 GeV are described by appropriately unitarized Breit-Wigner forms. The data have been analyzed by both single-energy and global fits, and the transverse and longitudinal helicity amplitudes have been extracted for the four-star resonances below 2 GeV. Because of its inherent simplicity, MAID2007 is well adopted for predictions and analysis of the observables in pion photo- and electroproduction.

yearjournalcountryeditionlanguage
2008-01-01
https://doi.org/10.1007/978-3-540-85144-8_21