Studying the $$P_c(4450)$$ Resonance in $$J/\psi $$ Photoproduction Off Protons
نویسندگان
چکیده
منابع مشابه
Primakoff effect in η-photoproduction off protons
We analyse data on forward η-meson photoproduction off a proton target and extract the η→γγ decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available γp→pη data for differential cross sections and polarizations. We compare our results with present information on the two-photon η-dec...
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We investigate near threshold neutral pion photoproduction off protons to fourth order in heavy baryon chiral perturbation theory in the light of the new data from MAMI. We show that the unitarity cusp at the secondary πn threshold is in agreement with expectations from the final state theorem. We also analyze the fourth order corrections to the P–wave low–energy theorems and show that potentia...
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An effective field theory with hadrons and photons is constructed, where the hadronic parameters are determined by fitting elastic πN scattering data. The predicted pioninduced η-production on the nucleon agrees well with the data. The hadronic model is then used to describe the final-state interaction in photoinduced processes. We present a consistent description of pion photoproduction in the...
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We study the contribution of the Drell mechanism driven by K + and K − exchange to the reaction γN →K ¯ KN. Our calculation implements the full KN and ¯ KN reaction amplitudes in the form of partial wave amplitudes taken from a meson-exchange model (KN) and a partial wave analysis (¯ KN), respectively. Comparing our results to data of the LAMP2 collaboration we observe that the Drell mechanism ...
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Beam-helicity asymmetries have been measured at the MAMI accelerator in Mainz for the photoproduction of mixed-charge pion pairs in the reactions γp → nππ off free protons and γd → (p)pπ0π− and γd → (n)nππ off quasi-free nucleons bound in the deuteron for incident photon energies up to 1.4GeV. Circularly polarized photons were produced from bremsstrahlung of longitudinally polarized electrons a...
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ژورنال
عنوان ژورنال: Few-Body Systems
سال: 2018
ISSN: 0177-7963,1432-5411
DOI: 10.1007/s00601-018-1426-3