[PDF] Top 20 The polarization of the recoil proton in ETA photoproduction
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The polarization of the recoil proton in ETA photoproduction
... 'rhe proton direction ( b efore the scatter) together with the known direc t ion o f the incom i ng y-ray define the reaction plane.. Since in this expression we a[r] ... See full document
105
Measurement of recoil proton polarization in neutral pion phtoproduction at 60 and 90 degrees, using a wire chamber system
... remaining source of background, aside from proton Compton scat- tering, to be multiple neutral pion photoproduction simulating single neutral pion photoproduction in [r] ... See full document
194
Photon beam asymmetry Sigma for eta and eta ' photoproduction from the proton
... η photoproduction on the proton using the Jülich–Bonn approach found that, when the new data reported here are considered, the helicity couplings for the N ( 1720 ) 3 / 2 + and N ( 1900 ) 3 / 2 + states ... See full document
10
Recoil polarization measurements
... Figure 4. Photograph of one of the annular sensors. 2.3 Setup with Square Double-Sided Sensors Rectangular and square double-sided AC-coupled sensors of a thickness of 300 μm and a pitch (strip-to-strip dis- tance) of 65 ... See full document
5
Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
... Finally we want to discuss a very new attempt to study possible consequences from a narrow N(1900) state, a few MeV above η 0 threshold. Recently, Anisovich et al. [17] have shown that a narrow N(1900) 3 2 − D 13 ... See full document
6
SAID analysis of meson photoproduction: Determination of neutron and proton EM couplings
... Much of the effort aimed at providing complete or nearly complete information for meson-nucleon photoproduction reactions has been directed to measuring double-polarization observables. However, often ... See full document
6
Beam asymmetry Σ in η′ photoproduction off the proton at the GRAAL experiment
... also polarization observables in order to solve the ambiguities in the choice of the parameters used in their ...of photoproduction off the proton analysis, identifying the investigated meson by the ... See full document
5
Analysis of the η′ photoproduction off the proton and preliminary beam asymmetry results at the GRAAL experiment
... η photoproduction were published by the CLAS Collaboration ...also polarization observables in order to solve the ambiguity in the choice of the parameters used in their ... See full document
6
Photoproduction of Mesons
... Figure 3: A slice view through the BGO ball. Figure 4: A schematic of the BGO-OD experiment. The commissing of BGO-OD was succesfully finished in 2015. Additionally to commissioning tests, the first data of approximately ... See full document
16
Differential cross sections and polarization observables from CLAS K* photoproduction and the search for new N* states
... The reaction γ p → K ∗+ was measured using the CLAS detector for photon energies between the threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. For the first time, spin- density matrix elements ... See full document
Run05 Proton Beam Polarization Measurements by pc-polarimeter (ver. 1.1)
... the detector. The pulse shapes are then digitized at the equivalent frequency of 420 MHz and analyzed inside the WFD modules, providing the recoil carbon deposited energy and time- of-flight. The events are then ... See full document
104
First measurement of the polarization observable E and helicity-dependent cross sections in single π0 photoproduction from quasi-free nucleons
... products, recoil nucleons and decay photons from the π 0 meson were detected with the Crystal Ball and TAPS electromagnetic ...free proton target showed that the absolute scale of the cross sections is ... See full document
10
First measurement of the polarization observable E and helicity-dependent cross sections in single π0 photoproduction from quasi-free nucleons
... 0 photoproduction from protons and neutrons bound in the deuteron at the electron accelerator facility MAMI in Mainz, ...products, recoil nucleons and decay photons from the π 0 meson were detected with the ... See full document
11
First measurement of Xi(-) polarization in photoproduction
... the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely ...their polarization, which could help discern their production mechanisms and ... See full document
8
First measurement of Ξ− polarization in photoproduction
... the photoproduction of hyperons, both their production mechanisms and their spectra of excited states are still largely ...their polarization, which could help discern their production mechanisms and ... See full document
8
Eta meson photoproduction in the region of the third nucleon resonance
... Emery, and from the synchrotron operators, headed by Al Neubieser, is gratefully acknowledged. For financial support, the author is indebted to the National Science Foundat[r] ... See full document
136
Proton Recoil Spectrometer for Fast Neutron Spectra
... Figure 6 shows the total efficiency which is the number of neutrons counted per unit •time per unit neutron angular flux incident on the source end of the collimator and directed about t[r] ... See full document
15
Finite Energy Sum Rules in Eta Photoproduction off the Nucleon
... pion photoproduction, where the factoriza- tion of the pion exchange term predicts a dip in the cross section at t = 0, while the observed cross sec- tion is finite in the range 0 ≤ −t ≤ m 2 π ... See full document
20
Exclusive photoproduction of J/Ψ and Ψ′ mesons in proton-proton collisions
... 2 Institute of Nuclear Physics PAN, PL-31-342 Cracow, Poland Abstract. We present results based on our new paper [1]. The amplitude for the γp → V p reaction is calculated in a pQCD k t -factorization approach. The ... See full document
5
Eta Meson Production in Proton-Deuteron Collisions
... Eta Meson Production in Proton-Deuteron Collisions Alfons Khoukaz 1 , a 1 Institut für Kernphysik, Westfälische-Wilhelms-Universität Münster, 48149 Münster, Germany Abstract. Since many years the strong ... See full document
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