Author/Authors :
J.G. Messchendorp ، نويسنده , , J.C.S. Bacelar، نويسنده , , M.J. van Goethem، نويسنده , , M.N. Harakeh، نويسنده , , M. Hoefman، نويسنده , , H. Huisman، نويسنده , , N. Kalantar-Nayestanaki، نويسنده , , A.Yu. Korchin، نويسنده , , H. Lohner، نويسنده , , R.W. Ostendorf، نويسنده , , B. Krusche and S. Schadmand، نويسنده , , O. Scholten، نويسنده , , M. Volkerts، نويسنده , , H.W. Wilschut، نويسنده , , R.S. Simon، نويسنده ,
Abstract :
Exclusive differential cross sections of virtual-photon radiative proton capture in pd→3He+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.
