Two-photon exchange and electromagnetic proton form factors
نویسندگان
چکیده
منابع مشابه
Two-photon Exchange and Electromagnetic Proton Form Factors
The presence of 2γ-exchange in electron proton elastic scattering is discussed. From C-invariance and crossing symmetry, 2γ contribution induces a specific dependence of the reduced cross section on the variable ǫ. No evidence of such dependence exists in the available experimental data.
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Corrections of two-photon exchange to proton and neutron electromagnetic form factors are employed to study the effect of two-photon exchange on the deuteron electromagnetic form factors. Numerical results of the effect are given. It is suggested to test the effect in the measurement of Pz in a small angle limit. PACS: 13.60.Hb,12.38.Aw, 12.38Cy; 12.38.-t; 13.60.Fz, 12.40.Nn
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We estimate two-photon exchange contribution to the process e + e− → p + p̄. The two-photon exchange corrections to double spin polarization observables and form factors in the time-like region are calculated. The corrections are found to be small in magnitude, but with a strong angular dependence at fixed momentum transfer. These two features are the same as those in the spacelike region. In th...
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Significant discrepancies have been observed between proton form factors as measured by Rosenbluth separation and polarization transfer techniques. There are indications that this difference may be caused by corrections to the one photon exchange approximation that are not taken into account in standard radiative correction procedures. In this paper, we constrain the two-photon amplitudes by co...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2005
ISSN: 0375-9474
DOI: 10.1016/j.nuclphysa.2005.03.027