Validity of the one-photon exchange approximation in inelastic scattering of electrons and positrons on protons

Hartwig, Sabina; Heimlich, F. H.; Huber, G.; Rössle, E.; Köbberling, M.; Moritz, J.; Schmidt, K.; Wegener, D.; Zeller, D.; Bleckwenn, J.

doi:10.1007/bf02725159

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…• Inelastic scattering on protons at DESY has also been reported in Ref. [34] (open lozenges, black) for θ =9 and 13 • , giving a value of the ratio compatible with one, within an error of 4 and 5%. The inelastic region from 1.2 < W < 3.4 was covered by several measurements in which no systematic trend was observed.…”

Section: B Inelastic Scatteringsupporting

confidence: 64%

“…The simpler measurements were performed in Refs. [29][30][31][32][33][34][35] and experiment II of Ref. [36] where a single arm magnetic spectrometers detects the scattered lepton.…”

Section: A Elastic Scatteringmentioning

confidence: 99%

“…In these kinematical conditions soft photon Here N is a number attributed to each point, following a sequential order from Refs. [31] (solid squares, black), [45] (triangles, red), [46]-H target (triangles down, green), [46]-D target (open circles, blue), [35]- 12 C target (open squares, magenta), [35]- 27 Al target (open triangles, cyan), [34] (open lozenges, black), [47] (open crosses, red).…”

Section: B Inelastic Scatteringmentioning

confidence: 99%

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Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei

et al. 2013

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20 pages, 7 figures 2 tablesWorld data on the lepton-charge asymmetry in the elastic and inelastic lepton scattering off the proton and nuclei are compiled and discussed. After reviewing the published results, we compare the elastic data to a model calculation of the two-photon exchange mechanism. We show that the existing data do not provide any evidence for the two-photon contribution. At significance level 0.05 the data allow to exclude the two-photon exchange as an explanation for the difference between Rosenbluth and polarization measurements of proton electromagnetic form factors

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Section: B Inelastic Scatteringsupporting

confidence: 64%

“…The simpler measurements were performed in Refs. [29][30][31][32][33][34][35] and experiment II of Ref. [36] where a single arm magnetic spectrometers detects the scattered lepton.…”

Section: A Elastic Scatteringmentioning

confidence: 99%

Section: B Inelastic Scatteringmentioning

confidence: 99%

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Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei

et al. 2013

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“…Up to now, experimental searches have been mainly performed in elastic lepton-nucleon scattering, where non-zero transverse-beam SSAs of order 10 −5 − 10 −6 have been measured [4]. In inelastic scattering, no clear indication of two-photon exchange has yet been observed, where various attemps of measuring both transverse-target SSAs [6,7,8] and cross-section ratio [9,10,11,12,13,14,15] show no effect within the few-percent level. No experimental search has been done in deep-inelastic scattering (DIS) to date.…”

Section: Introductionmentioning

confidence: 99%

Search for a Two-Photon Exchange Contribution in inclusive DIS at sc hermes

Ruiz¹

2009

Proceedings of the XVII International Workshop on Deep-Inelastic Scattering and Related Topics

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The transverse-target single-spin asymmetry for inclusive deep-inelastic scattering with effectively unpolarized electron and positron beams off a transversely polarized hydrogen target was measured, with the goal of searching for a two-photon exchange signal in the kinematic range 0.004 < x < 0.9 and 0.1 GeV 2 < Q 2 < 20 GeV 2. In two separate regions Q 2 > 1 GeV 2 and Q 2 < 1 GeV 2 , and for both electron and positron beams, the asymmetries are found to be consistent with zero within statistical and systematic uncertainties, which are of order 10 −3 for the overall asymmetries.

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“…In inelastic scattering no clear signature of two-photon exchange effects has yet been observed. Measurements of the cross-section ratio R with e + /e − and µ + /µ − beams [12][13][14][15][16][17][18] show no effect within their accuracy of a few percent. The transverse-target SSA has been measured at the Cambridge Electron Accelerator [19,20] and at Slac [21].…”

mentioning

confidence: 99%

Search for a two-photon exchange contribution to inclusive deep-inelastic scattering

Rith

2011

J. Phys.: Conf. Ser.

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The transverse-target single-spin asymmetry for inclusive deep-inelastic scattering with effectively unpolarized electron and positron beams off a transversely polarized hydrogen target was measured, with the goal of searching for a two-photon exchange signal in the kinematic range 0.007 < xB < 0.9 and 0.25 GeV 2 < Q 2 < 20 GeV 2. In two separate regions Q 2 > 1 GeV 2 and Q 2 < 1 GeV 2 , and for both electron and positron beams, the asymmetries are found to be consistent with zero within

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Validity of the one-photon exchange approximation in inelastic scattering of electrons and positrons on protons

Cited by 6 publications

References 8 publications

Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei

Compilation and analysis of charge asymmetry measurements from electron and positron scattering on nucleon and nuclei

Search for a Two-Photon Exchange Contribution in inclusive DIS at sc hermes

Search for a two-photon exchange contribution to inclusive deep-inelastic scattering

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