Measurement of the cross-section asymmetry of deuteron photodisintegration process by linearly polarized photons in the energy range E γ = 0.8–1.6 GeV

Adamian, F.V.; Aganiants, A.O.; Borzunov, Yu.T.; Chumakov, S.N.; Demekhina, N. A.; Frangulian, G S; Golovanov, L.B.; Grabski, V.; Hairapetian, A V; Hakobyan, H.; Keropian, I.A.; Lebedev, Igor; Manukian, Zh.V.; Moroz, N.S.; Movsesian, G.; Muradian, E.G.; Oganesian, A. G.; Oganezov, R.; Panebratsev, Y.; Rekalo, M.P.; Shimanski, S.; Sirunian, A.M.; Torosian, H.; Tsvenev, A.; Vartapetian, H.; Volchinski, V.

doi:10.1007/s100500070097

Cited by 20 publications

(13 citation statements)

References 8 publications

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“…• . The red (triangle) and cyan (circle) points show the results from Yerevan [11,12], whereas the blue square points are the results from the present work. The solid and dash-dotted lines are the QGSM [53] and HRM [54,55] predictions, respectively.…”

Section: Discussionmentioning

confidence: 95%

“…The beam-spin asymmetry, Σ, was measured at Yerevan [11,12]; the induced proton polarization, P y , and the polarization transfers, C x and C z , were measured at JLab [9,10]. On the theoretical side, two calculations of the spin observables are available, within the QGSM [53] and HRM [54] frameworks.…”

Section: Experimental Status Of Deuteron Photodisintegrationmentioning

confidence: 99%

“…During the last 25 years a number of experiments have measured its differential cross section over a broad range in energy and angle [1][2][3][4][5][6][7][8]. There are also some data on the recoil proton polarization [9,10] and the single beam-spin asymmetry [11,12]. The most remarkable property of the available crosssection data is the energy behavior of this photonuclear process.…”

Section: Introduction a Scaling Laws In Qcd And Experimental Datamentioning

confidence: 99%

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Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy regionEγ=1.1–2.3 GeV

Zachariou¹,

Ilieva²,

Berman³

et al. 2015

Phys. Rev. C

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The beam-spin asymmetry, Σ, for the reaction γd → pn has been measured using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility (JLab) for six photon-energy bins between 1.1 and 2.3 GeV, and proton angles in the center-of-mass frame, θc.m., between 25• and 160• . These are the first measurements of beam-spin asymmetries at θc.m. = 90• for photon-beam energies above 1.6 GeV, and the first measurements for angles other than θc.m. = 90• . The angular and energy dependence of Σ is expected to aid in the development of QCD-based models to understand the mechanisms of deuteron photodisintegration in the transition region between hadronic and partonic degrees of freedom, where both effective field theories and perturbative QCD cannot make reliable predictions.

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Section: Discussionmentioning

confidence: 95%

Section: Experimental Status Of Deuteron Photodisintegrationmentioning

confidence: 99%

Section: Introduction a Scaling Laws In Qcd And Experimental Datamentioning

confidence: 99%

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Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy regionEγ=1.1–2.3 GeV

Zachariou¹,

Ilieva²,

Berman³

et al. 2015

Phys. Rev. C

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“…Figure 10 shows recent high energy Yerevan data [24] on the polarized photon asymmetry Σ. The result expected from pQCD (supplemented by additional assumptions) that Σ(90…”

Section: Photodisintegrationmentioning

confidence: 96%

Electromagnetic structure of the deuteron

Gross

2003

Eur. Phys. J. A

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Abstract. Recent high energy measurements of elastic ed scattering support the use of a relativistic theory based on an accurate description of the N N channel, but theory needed for an understanding of the high energy deuteron photodisintegration cross sections and polarization observables is not yet mature.PACS. 25.30.B, 25.30.D, F elastic and inelastic electron scattering -24.10.J Relativistic models (nuclear reactions)

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“…It is worth mentioning that the calculations based on a conventional mesonic picture of strong interaction failed to explain the observed energy scaling, which can be considered another indication that the quark degrees of freedom need to be included for an adequate description of the reaction. The deuteron two-body hard photodisintegration reactions have been used also to measure the polarization observables [12][13][14][15], which were in general agreement with the quark-constituent picture of hard scattering.…”

Section: Introductionmentioning

confidence: 99%

Hard photodisintegration of He3 into a pd pair

Maheswari

Sargsian

2017

Phys. Rev. C

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The recent measurements of high energy photodisintegration of the 3 He nucleus to the pd pair at 90 0 center of mass demonstrated an energy scaling consistent with the quark counting rule with unprecedentedly large exponent of s −17 . To understand the underlying mechanism of this process we extended the theoretical formalism of hard rescattering mechanism (HRM) to calculate the γ 3 He→ pd reaction. In HRM the incoming high energy photon strikes a quark from one of the nucleons in the target which subsequently undergoes hard rescattering with the quarks from the other nucleons generating hard two-body system in the final state of the reaction. Within the HRM we derived the parameter free expression for the differential cross section of the reaction, which is expressed through the 3 He→ pd transition spectral function, cross section of hard pd → pd scattering and the effective charge of the quarks being interchanged during the hard rescattering process. The numerical estimates of all these factors resulted in the magnitude of the cross section which is surprisingly in a good agreement with the data.

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Measurement of the cross-section asymmetry of deuteron photodisintegration process by linearly polarized photons in the energy range E γ = 0.8–1.6 GeV

Cited by 20 publications

References 8 publications

Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy regionEγ=1.1–2.3 GeV

Determination of the beam-spin asymmetry of deuteron photodisintegration in the energy regionEγ=1.1–2.3 GeV

Electromagnetic structure of the deuteron

Hard photodisintegration of He3 into a pd pair

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