scholarly journals Re-analysis of theΛ(1520)photoproduction reaction

2014 ◽  
Vol 89 (1) ◽  
Author(s):  
Ju-Jun Xie ◽  
En Wang ◽  
J. Nieves
Keyword(s):  
Photoproduction Reaction

scholarly journals A NEW MEASUREMENT OF BEAM ASYMMETRY IN PION PHOTOPRODUCTION FROM THE NEUTRON USING CLAS

2009 ◽  
Vol 24 (02n03) ◽  
pp. 497-500
Author(s):  
◽  
D. SOKHAN ◽  
D. WATTS ◽  
D. BRANFORD ◽  
F. KLEIN
Keyword(s):  
Energy Range ◽  
Excitation Spectrum ◽  
Preliminary Analysis ◽  
Pion Photoproduction ◽  
Photon Beam ◽  
Data Set ◽  
Beam Asymmetry ◽  
Large Acceptance ◽  
Photoproduction Reaction ◽  
Neutron Excitation

We present a preliminary analysis of the photon beam asymmetry observable (Σ) from the photoproduction reaction channel γn → π-p. This new data was obtained using the near-4π CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory, USA, employing a linearly polarised photon beam with an energy range 1.1 - 2.3 GeV. The measurement will provide new data to address the poorly established neutron excitation spectrum and will greatly expand the sparse world data-set both in energy and angle.

scholarly journals Λ(1520,3/2−)-photoproduction reaction viaγN→KΛ*(1520)

2005 ◽  
Vol 71 (11) ◽  
Author(s):  
Seung-Il Nam ◽  
Atsushi Hosaka ◽  
Hyun-Chul Kim
Keyword(s):  
Photoproduction Reaction

ON THRESHOLD PION PHOTOPRODUCTION AND LOW-ENERGY THEOREMS

1991 ◽  
Vol 06 (19) ◽  
pp. 1757-1761 ◽  
Author(s):  
RON L. WORKMAN ◽  
RICHARD A. ARNDT ◽  
ZHUJUN LI
Keyword(s):  
Neutral Pion ◽  
Pion Photoproduction ◽  
Low Energy ◽  
Coupling Constants ◽  
Apparent Discrepancy ◽  
Energy Data ◽  
Photoproduction Reaction

We show that low-energy data from the neutral-pion photoproduction reaction can be adequately described without resort to exotic mechanisms. An apparent discrepancy, which has been linked to recent measurements, appears to be due to assumptions regarding the rescattering correction and coupling constants. Consequences of this result are discussed.

scholarly journals Measurement of helicity dependence of single π0 photoproduction on deuteron

2019 ◽  
Vol 199 ◽  
pp. 02007 ◽  
Author(s):  
Federico Cividini
Keyword(s):  
Resonant State ◽  
Photon Beam ◽  
Deuteron Target ◽  
Free Neutron ◽  
Double Polarization ◽  
The Status ◽  
Large Acceptance ◽  
Photoproduction Reaction ◽  
Baryon Resonances ◽  
Polarised Beams

The study of the properties of the baryon resonances gives essential constraints on models for nucleon structure. Pion-photoproduction is a powerful tool to excite the nucleon to an intermediate resonant state and, in combination with polarised beams/targets, plays an important role in the investigation of the nucleon resonances. Data for polarisation observables accessible using a polarised photon beam and/or polarised nucleon targets are scarce in many channels, especially in those involving a neutron target. A systematic measurement is performed at the Mainz facility by the A2@MAMI collaboration. This talk will focus on the experiment performed at the Mainz Microtron, using a circularly polarised photon beam and a longitudinally polarised deuteron target, in conjunction with the large acceptance Crystal Ball/TAPS detection setup. An overview of the status of the experiment will be given, together with the preliminary results of polarised cross section from deuteron and of the double polarization observable E for the single π0 photoproduction reaction from the quasi-free proton and quasi-free neutron.

O(3,1) symmetry and the photoproduction reaction γp→π+n

1969 ◽  
Vol 11 (1) ◽  
pp. 73-78
Author(s):  
S. Raghavan ◽  
M. Samiullah
Keyword(s):  
Photoproduction Reaction

scholarly journals CHIRAL DYNAMICS AND DUBNA-MAINZ-TAIPEI DYNAMICAL MODEL FOR PION PHOTOPRODUCTION REACTION

2011 ◽  
Vol 26 (03n04) ◽  
pp. 718-721
Author(s):  
SHIN NAN YANG
Keyword(s):  
Pion Photoproduction ◽  
Dynamical Model ◽  
Meson Exchange ◽  
Economic Framework ◽  
Photoproduction Reaction ◽  
Chiral Lagrangian

We demonstrate that the Dubna-Mainz-Taipei (DMT) meson-exchange dynamical model, which starts from an effective chiral Lagrangian, for pion photoproduction provides an excellent and economic framework to describe both the π0 threshold production and the Δ deformation, two features dictated by chiral dynamics.

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