First measurement of proton's charge form factor at very low Q2 with initial state radiation

Mihovilovič, M. and Weber, A. B. and Achenbach, P. and Beranek, T. and Beričič, J. and Bernauer, J. C. and Boehm, R. and Bosnar, Damir and Cardinali, M. and Correa, L. and Debenjak, L. and Denig, A. and Distler, M. O. and Esser, A. and Bondy, M. I. Ferretti and Fonvieille, H. and Friedrich, J. M. and Friščić, Ivica and Griffioen, K. and Hoek, M. and Kegel, S. and Kohl, Y. and Merkel, H. and Middleton, D. G. and Mueller, U. and Nungesser, L. and Pochodzalla, J. and Rohrbeck, M. and Majos, S. Sanchez and Schlimme, B. S. and Schoth, M. and Schulz, F. and Sfienti, C. and Širca, S. and Stajner, S. and Thiel, M. and Tyukin, A. and Vanderhaeghen, M. and Weinriefer, M. (2017) First measurement of proton's charge form factor at very low Q2 with initial state radiation. Physics Letters B, 771. pp. 194-198. ISSN 0370-2693

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We report on a new experimental method based on initial-state radiation (ISR) in e–p scattering, which exploits the radiative tail of the elastic peak to study the properties of electromagnetic processes and to extract the proton charge form factor (GEp) at extremely small Q2. The ISR technique was implemented in an experiment at the three-spectrometer facility of the Mainz Microtron (MAMI). This led to a precise validation of radiative corrections far away from elastic line and provided first measurements of GEp for 0.001≤Q2≤0.004(GeV/c)2.

Item Type: Article
Date: 10 August 2017
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
Divisions: Faculty of Science > Department of Physics
Publisher: Elsevier
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 02 Dec 2017 16:54
Last Modified: 02 Dec 2017 16:54

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