Experimental Verification of the Kramers-Kronig Relation at High Energy

Alvensleben, H.; Becker, U.; Biggs, Peter J.; Busza, W.; Chen, M.; Edwards, Roderick; Mantsch, P.; McCorriston, T.; Nash, T.; Rohde, M.; Sadrozinski, H. F-W.; Schubel, H.; Ting, Samuel C.C.; Wu, S. L.

doi:10.1103/physrevlett.30.328

Cited by 23 publications

(24 citation statements)

References 14 publications

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“…(3), with increasing M γ the BH peak is shifted towards larger angles θ l , and for M γ = 500 MeV (Fig. (3), right, bottom) it occurs at 4 Contribution to the imaginary part from the γN rescattering is of the order e 4 and thus negligibly small the angle θ BH = 32…”

Section: A Cross Sections For Virtual Compton Scatteringmentioning

confidence: 99%

“…The recoil-proton polarization P pr y (Fig. (2), bottom) vanishes below the pion-production threshold since the imaginary part of the amplitude due to πN rescattering is zero 4 . The behavior of P pr y is in agreement with the present calculation as well as with the model [31], although the error bars on the data are large.…”

Section: Description Of the Model And Comparison With Data For Reamentioning

confidence: 99%

“…Another interesting observable, the e − e + asymmetry, which is proportional to the virtual CS -BH interference (see [4][5][6][7]), will not be addressed here. Measuring this would require detection of the charges of the leptons.…”

Section: Formalismmentioning

confidence: 99%

“…Only when lepton charges are measured this can be turned to an advantage by measuring an e + e − asymmetry which is directly proportional to the virtual CS -BH interference. This was suggested long ago [4] and more recently elaborated in [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Photoproduction of electron–positron pairs on the proton in the resonance region

Korchin¹,

Scholten²

2001

Nuclear Physics A

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Production of lepton pairs in the γp → e − e + p reaction is studied at photon energies up to 1 GeV. We show that even if lepton charge is not measured there are extensive kinematical regimes where the nuclear process dominates over the Bethe-Heitler contribution. The decomposition is performed of the unpolarized cross section for the virtual Compton scattering in terms of response functions. These are expressed in terms of a polarization density matrix of the virtual photon and are shown to be sensitive to the properties of baryon resonances in the first and the second resonance regions. In the analysis a unitary K-matrix model is used, based on an effective Lagrangian including nucleon, mesons, and baryon resonances with masses up to 1.7 GeV. Results of the model are compared with data for real-photon Compton scattering and predictions are given for observables in photoproduction of lepton pairs.

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Section: A Cross Sections For Virtual Compton Scatteringmentioning

confidence: 99%

Section: Description Of the Model And Comparison With Data For Reamentioning

confidence: 99%

Section: Formalismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photoproduction of electron–positron pairs on the proton in the resonance region

Korchin¹,

Scholten²

2001

Nuclear Physics A

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“…As shown in this letter the interference with the BH-background can be exploited to make VCS a sensitive measure for nucleon structure. Following an idea originally proposed in [2] and more recently investigated in [3] the BH-process can be used to ones advantage. The lepton pair emerging from the BH process interacts with two photons (see Fig.…”

mentioning

confidence: 99%

Lepton-pair production in virtual Compton scattering off the proton

Korchin¹,

Scholten²,

Jong³

1997

Physics Letters B

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We show that lepton-pair production in Virtual Compton Scattering offers, through interference with the well-known Bethe-Heitler process, a sensitive probe to learn the longitudinal response of resonances and the electromagnetic nucleon form factors. This interference can be measured directly in terms of an asymmetry. The role of off-shell effects in the N-N-γ vertices is investigated as well. An additional N-N-γ-γ contact term in the amplitude, included to ensure gauge invariance of the model, cancels a substantial part of the off-shell effects.

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A - C

Höhler¹

1983

Pion Nucleon Scattering. Part 2: Methods and Results of Phenomenological Analyses

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Experimental Verification of the Kramers-Kronig Relation at High Energy

Cited by 23 publications

References 14 publications

Photoproduction of electron–positron pairs on the proton in the resonance region

Photoproduction of electron–positron pairs on the proton in the resonance region

Lepton-pair production in virtual Compton scattering off the proton

A - C

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