The Spin Response of the  $$\vec{\boldsymbol{\gamma}}\vec{\boldsymbol{d}}\to\pi^{0}\boldsymbol{d}$$

Reaction Near Threshold and Its Implication to the GDH Sum Rule and the Double Polarization $$\boldsymbol{E}$$-Asymmetry

Darwish, E. M.; Abou-Elsebaa, H. M.; Alsadi, Kh. S.; Yousef, Mohamed

doi:10.3103/s002713492003008x

Cited by 3 publications

(1 citation statement)

References 51 publications

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“…So far, many studies have been carried out dealing with the reaction γd → π 0 d in the photon energy region from π-threshold up to 1 GeV in order to obtain information on π 0 -photoproduction off free neutrons [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. In spite of all these great theoretical efforts, a good description of the experimental data has not been yet found [3,4,6,7].…”

Section: Introductionmentioning

confidence: 99%

Uncertainties in theoretical predictions for γd → π 0d observables near threshold due to the use of different elementary amplitudes

et al. 2022

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We discuss possible uncertainties in theoretical predictions for γd → π 0 d observables near threshold due to the use of different elementary γN → πN amplitudes using an approach which is based on time-ordered perturbation theory. Results are presented for unpolarized cross sections and all possible spin asymmetries of differential and total cross sections. Our results indicate that the estimations of the uncertainty on the γd → π 0 d observables show important sensitivity to the modeling of the elementary γN → πN operator. A comparison to presently available experimental data is given. The results presented here are of particular interest for the evaluation of the systematic uncertainties caused by the use of different elementary operators in the analyses of γd → π 0 d measurements to extract information on the free neutron amplitude from deuteron data.

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Section: Introductionmentioning

confidence: 99%

Uncertainties in theoretical predictions for γd → π 0d observables near threshold due to the use of different elementary amplitudes

et al. 2022

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Influence of final-state interaction on double spin asymmetries in incoherent π+-photoproduction on the deuteron near threshold

Darwish

Al-Ghamdi

2020

Int. J. Mod. Phys. E

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Incoherent [Formula: see text]-photoproduction on the deuteron is investigated for photon energies near threshold with particular focus on beam-target double spin asymmetries. The analysis is based on a [Formula: see text] reaction model in which realistic elementary amplitudes for [Formula: see text], [Formula: see text] and [Formula: see text] are incorporated. Numerical results on all possible beam-target double spin asymmetries of the differential and total cross-sections in the photon energy region near threshold are presented. Effects of [Formula: see text] and [Formula: see text] final-state interactions are investigated and their roles are found to be important.

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Sensitivity of Polarization Observables in $${\gamma}\boldsymbol{d\to}{\pi}^{\mathbf{0}}\boldsymbol{d}$$ Reaction Near Threshold to the Choice of Elementary $${\gamma}\boldsymbol{N\to}{\pi}\boldsymbol{N}$$ Amplitude and Deuteron Wave Function

Darwish

Al-Ghamdi

2021

Moscow Univ. Phys.

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The Spin Response of the $$\vec{\boldsymbol{\gamma}}\vec{\boldsymbol{d}}\to\pi^{0}\boldsymbol{d}$$ Reaction Near Threshold and Its Implication to the GDH Sum Rule and the Double Polarization $$\boldsymbol{E}$$-Asymmetry

Cited by 3 publications

References 51 publications

Uncertainties in theoretical predictions for γd → π 0d observables near threshold due to the use of different elementary amplitudes

Uncertainties in theoretical predictions for γd → π 0d observables near threshold due to the use of different elementary amplitudes

Influence of final-state interaction on double spin asymmetries in incoherent π+-photoproduction on the deuteron near threshold

Sensitivity of Polarization Observables in $${\gamma}\boldsymbol{d\to}{\pi}^{\mathbf{0}}\boldsymbol{d}$$ Reaction Near Threshold to the Choice of Elementary $${\gamma}\boldsymbol{N\to}{\pi}\boldsymbol{N}$$ Amplitude and Deuteron Wave Function

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