Electroproduction of Nucleon Resonances with Polarized Leptons
نویسندگان
چکیده
منابع مشابه
Electroproduction of nucleon resonances
The unitary isobar model MAID has been extended and used for a partial wave analysis of pion photoand electroproduction in the resonance region W < 2 GeV. Older data from the world data base and more recent experimental results from Mainz, Bates, Bonn and JLab for Q up to 4.0 (GeV/c) have been analyzed and the Q dependence of the helicity amplitudes have been extracted for a series of four star...
متن کاملNucleon resonances in polarized ω photoproduction
The role of the nucleon resonances (N∗) in ω photoproduction is investigated by using the resonance parameters predicted by Capstick and Roberts. The contributions from the nucleon resonances are found to be significant in various spin asymmetries. In particular, we found that a crucial test of our predictions can be made by measuring the parity asymmetry and beam-target double asymmetry at for...
متن کاملResonances and higher twist in polarized lepton-nucleon scattering∗
We present a detailed analysis of resonance contributions in the context of higher twist effects in the moments of the proton spin structure function g1. For each of these moments, it is found that there exists a characteristic Q2 region in which (perturbative) higher twist corrections coexist with (non-perturbative) resonance contribution of comparable magnitude. PACS: 12.38.Cy, 13.60.Hb, 13.8...
متن کاملProbing nucleon strangeness structure with φ electroproduction
We study the possibility to constrain the hidden strangeness content of the nucleon by means of the polarization observables in φ meson electroproduction. We consider the OZI evading direct knockout mechanism that arises from the non-vanishing ss̄ sea quark admixture of the nucleon as well as the background of the dominant diffractive and the oneboson-exchange processes. Large sensitivity on the...
متن کاملWeak and Electroproduction of Nucleon Resonances in the Harmonic Oscillator Quark Model
Using the model that the baryons are composed of quarks with harmonic interactions, we compute cross-sections for high energy neutrinos and electrons to excite the nucleon to the resonance states with masses below 1.9 GeV. The frame dependence of the nonrelativistic quark model results is emphasized and discrepancies between some previous model calculations of electroproduction form factors and...
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: Physical Review D
سال: 1972
ISSN: 0556-2821
DOI: 10.1103/physrevd.6.2533