Cross sections and electromagnetic response functions for radiative proton capture in [formula omitted]

Exclusive differential cross sections of virtual-photon radiative proton capture in pd→ 3 He+e +e − at a proton energy of 190 MeV have been measured for the first time. The leptonic-angle dependence of the measured cross section is exploited in order to determine the electromagnetic response functio...

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Bibliographic Details
Published in:Physics letters. B 2000-05, Vol.481 (2), p.171-176
Main Authors: Messchendorp, J.G., Bacelar, J.C.S., van Goethem, M.J., Harakeh, M.N., Hoefman, M., Huisman, H., Kalantar-Nayestanaki, N., Korchin, A.Yu, Löhner, H., Ostendorf, R.W., Schadmand, S., Scholten, O., Volkerts, M., Wilschut, H.W., Simon, R.S.
Format: Article
Language:English
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Summary:Exclusive differential cross sections of virtual-photon radiative proton capture in pd→ 3 He+e +e − at a proton energy of 190 MeV have been measured for the first time. The leptonic-angle dependence of the measured cross section is exploited in order to determine the electromagnetic response functions in the time-like region. The data are compared to a relativistic gauge-invariant impulse approximation and a Faddeev calculation. Differences between theoretical predictions and data are discussed in terms of enhanced magnetic radiation possibly originating from virtual Δ excitations.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(00)00441-X