Final-state NN-rescattering in spin asymmetries of (γ, π-) reaction

Eed M. Darwish; Agus Salam

doi:10.1016/j.nuclphysa.2005.04.026

Final-state NN-rescattering in spin asymmetries of (γ, π^-) reaction

Eed M. Darwish, Agus Salam

Department of Physics

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The role of the final-state NN-rescattering (NN-FSI) in the polarization observables of the inclusive reaction d (γ, π^-) p p, involving polarization of the photon beam and/or the deuteron target, is investigated. Various single- and double-spin asymmetries are studied with respect to the influence of such interaction effect and numerical predictions are given for forthcoming experiments. It has been found that the effect of NN-FSI is quite important for the single-spin asymmetries Σ, T₂₀, T₂₁ and T₂₂ and the double-spin asymmetry T₂₀^ℓ, whereas it is much less important for the vector target asymmetry T₁₁ and other beam-target double-polarization asymmetries. Furthermore, we found that the inclusion of the NN-FSI improves the description of the LEGS data for the linear photon asymmetry.

Original language	English
Pages (from-to)	170-187
Number of pages	18
Journal	Nuclear Physics A
Volume	759
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysa.2005.04.026
Publication status	Published - 5 Sept 2005

Keywords

Final-state interactions
Meson production
Photonuclear reactions
Photoproduction reactions
Polarization phenomena in reactions
Spin observables

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10.1016/j.nuclphysa.2005.04.026

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@article{48538d752d8242a0826b9b88f64e0148,

title = "Final-state NN-rescattering in spin asymmetries of (γ, π-) reaction",

abstract = "The role of the final-state NN-rescattering (NN-FSI) in the polarization observables of the inclusive reaction d (γ, π-) p p, involving polarization of the photon beam and/or the deuteron target, is investigated. Various single- and double-spin asymmetries are studied with respect to the influence of such interaction effect and numerical predictions are given for forthcoming experiments. It has been found that the effect of NN-FSI is quite important for the single-spin asymmetries Σ, T20, T21 and T22 and the double-spin asymmetry T20ℓ, whereas it is much less important for the vector target asymmetry T11 and other beam-target double-polarization asymmetries. Furthermore, we found that the inclusion of the NN-FSI improves the description of the LEGS data for the linear photon asymmetry.",

keywords = "Final-state interactions, Meson production, Photonuclear reactions, Photoproduction reactions, Polarization phenomena in reactions, Spin observables",

author = "Darwish, {Eed M.} and Agus Salam",

note = "Funding Information: This work is supported in part by the Bibliotheca Alexandrina—Center for Special Studies and Programs—under grant No. 2602314 Sohag 2nd-Sohag. We are indebted to Profs. H. Arenh{\"o}vel, T.-S. Harry Lee, T. Sato and A. Sandorfi for fruitful discussions and valuable informations.",

year = "2005",

month = sep,

day = "5",

doi = "10.1016/j.nuclphysa.2005.04.026",

language = "English",

volume = "759",

pages = "170--187",

journal = "Nuclear Physics A",

issn = "0375-9474",

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number = "1-2",

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TY - JOUR

T1 - Final-state NN-rescattering in spin asymmetries of (γ, π-) reaction

AU - Darwish, Eed M.

AU - Salam, Agus

N1 - Funding Information: This work is supported in part by the Bibliotheca Alexandrina—Center for Special Studies and Programs—under grant No. 2602314 Sohag 2nd-Sohag. We are indebted to Profs. H. Arenhövel, T.-S. Harry Lee, T. Sato and A. Sandorfi for fruitful discussions and valuable informations.

PY - 2005/9/5

Y1 - 2005/9/5

N2 - The role of the final-state NN-rescattering (NN-FSI) in the polarization observables of the inclusive reaction d (γ, π-) p p, involving polarization of the photon beam and/or the deuteron target, is investigated. Various single- and double-spin asymmetries are studied with respect to the influence of such interaction effect and numerical predictions are given for forthcoming experiments. It has been found that the effect of NN-FSI is quite important for the single-spin asymmetries Σ, T20, T21 and T22 and the double-spin asymmetry T20ℓ, whereas it is much less important for the vector target asymmetry T11 and other beam-target double-polarization asymmetries. Furthermore, we found that the inclusion of the NN-FSI improves the description of the LEGS data for the linear photon asymmetry.

AB - The role of the final-state NN-rescattering (NN-FSI) in the polarization observables of the inclusive reaction d (γ, π-) p p, involving polarization of the photon beam and/or the deuteron target, is investigated. Various single- and double-spin asymmetries are studied with respect to the influence of such interaction effect and numerical predictions are given for forthcoming experiments. It has been found that the effect of NN-FSI is quite important for the single-spin asymmetries Σ, T20, T21 and T22 and the double-spin asymmetry T20ℓ, whereas it is much less important for the vector target asymmetry T11 and other beam-target double-polarization asymmetries. Furthermore, we found that the inclusion of the NN-FSI improves the description of the LEGS data for the linear photon asymmetry.

KW - Final-state interactions

KW - Meson production

KW - Photonuclear reactions

KW - Photoproduction reactions

KW - Polarization phenomena in reactions

KW - Spin observables

UR - http://www.scopus.com/inward/record.url?scp=22544440579&partnerID=8YFLogxK

U2 - 10.1016/j.nuclphysa.2005.04.026

DO - 10.1016/j.nuclphysa.2005.04.026

M3 - Article

AN - SCOPUS:22544440579

SN - 0375-9474

VL - 759

SP - 170

EP - 187

JO - Nuclear Physics A

JF - Nuclear Physics A

IS - 1-2

ER -

Final-state NN-rescattering in spin asymmetries of (γ, π^-) reaction

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Keywords

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