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NSR database version of May 1, 2024.

Search: Author = A.Alsaad

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2021QA01      Phys.Rev. C 103, 045202 (2021)

I.A.Qattan, A.Alsaad, A.A.Ahmad

Extraction of elastic scattering cross-section ratio R_e+e- from ep elastic scattering experimental data

NUCLEAR REACTIONS ¹H(e^-, e^-), (e⁺, e⁺), Q²=0.01-10 (GeV/c)²; calculated elastic scattering cross section ratio R_e+e- using proposed, model-independent parametrizations of the hard two-photon exchange (TPE) corrections to electron-proton (ep) elastic scattering cross section. Comparison with other theoretical predictions, and with experimental data from CLAS, VEPP-3, and OLYMPUS experiments.

doi: 10.1103/PhysRevC.103.045202
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2021QA02      Phys.Rev. C 103, 055202 (2021)

I.A.Qattan, A.Alsaad, A.A.Ahmad

New extraction of the R_e+e- elastic scattering cross-section ratio based on a simplified phenomenological hard two-photon-exchange correction approach

NUCLEAR REACTIONS ¹H(e^-, e^-), (e⁺, e⁺), Q²=0.01-10 (GeV/c)²; analyzed experimental data from CLAS, VEPP-3, OLYMPUS and other experiments using phenomenological parameterization of the hard two-photon-exchange (TPE) corrections; deduced best fit parameters, TPE coefficient, σ(e⁺, e⁺)/σ(e^-, e^-) ratio.

doi: 10.1103/PhysRevC.103.055202
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2020QA01      Phys.Rev. C 101, 055202 (2020)

I.A.Qattan, S.P.Patole, A.Alsaad

Suppression of hard two-photon-exchange contributions to R_e+e- elastic scattering cross-section ratios: A phenomenological approach

NUCLEAR REACTIONS ¹H(e^-, e^-), (e⁺, e⁺), Q²=0.01-3 (GeV/c)²; calculated two-photon-exchange (TPE) coefficients, ratio R_e+e- or R_2γ of positron-proton and electron-proton elastic-scattering σ(E) using a new phenomenological parametrization of the two-photon-exchange corrections. Comparison with experimental data from CLAS, VEPP-3, and OLYMPUS experiments, and with other analyses.

doi: 10.1103/PhysRevC.101.055202
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2015QA01      Phys.Rev. C 91, 065203 (2015)

I.A.Qattan, J.Arrington, A.Alsaad

Flavor decomposition of the nucleon electromagnetic form factors at low Q²

NUCLEAR REACTIONS ¹H(e, e) at Q²<4.0 (GeV/c)²; analyzed elastic electromagnetic form factors of the proton and the two-photon-exchange (TPE) amplitude correction based on phenomenological TPE corrections to electron-proton cross sections; deduced new parametrization of the recoil-polarization ratio, predictions for ratio of positron-proton to electron-proton elastic scattering cross sections, nucleons flavor-separated form factors; compared the results to different phenomenological extractions and recent theoretical calculations.

doi: 10.1103/PhysRevC.91.065203
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2011QA01      Phys.Rev. C 83, 054307 (2011); Erratum JOUR PRVCA 84 029905 (2011)

I.A.Qattan, A.Alsaad

Empirical parametrization of the two-photon-exchange effect contributions to the electron-proton elastic scattering cross section

doi: 10.1103/PhysRevC.83.054307
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2011QA02      Phys.Rev. C 84, 054317 (2011)

I.A.Qattan, A.Alsaad, J.Arrington

Reexamination of phenomenological two-photon exchange corrections to the proton form factors and e ^± p scattering

NUCLEAR REACTIONS ¹H(e, e), E not given; calculated proton elastic electromagnetic form factors and two-photon exchange (TPE) contribution using two different parametrizations; analyzed electron-proton elastic cross sections. Comparison with different phenomenological extractions and direct calculations. Predictions for ratio of positron-proton or electron-proton elastic cross sections and comparison with previous analyses.

doi: 10.1103/PhysRevC.84.054317
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