| Literature DB >> 31765208 |
J Beričič1, L Correa2,3, M Benali2, P Achenbach3, C Ayerbe Gayoso3, J C Bernauer4,5, A Blomberg6, R Böhm3, D Bosnar7, L Debenjak1, A Denig3, M O Distler3, E J Downie8, A Esser3, H Fonvieille2, I Friščić9, S Kegel3, Y Kohl3, M Makek7, H Merkel3, D G Middleton3, M Mihovilovič1,3, U Müller3, L Nungesser3, M Paolone6, J Pochodzalla3, S Sánchez Majos3, B S Schlimme3, M Schoth3, F Schulz3, C Sfienti3, S Širca1,10, N Sparveris6, S Štajner1, M Thiel3, A Tyukin3, A Weber3, M Weinriefer3.
Abstract
Virtual Compton scattering on the proton has been investigated at three yet unexplored values of the four-momentum transfer Q^{2}: 0.10, 0.20, and 0.45 GeV^{2}, at the Mainz Microtron. Fits performed using either the low-energy theorem or dispersion relations allowed the extraction of the structure functions P_{LL}-P_{TT}/ε and P_{LT}, as well as the electric and magnetic generalized polarizabilities α_{E1}(Q^{2}) and β_{M1}(Q^{2}). These new results show a smooth and rapid falloff of α_{E1}(Q^{2}), in contrast to previous measurements at Q^{2}=0.33 GeV^{2}, and provide for the first time a precise mapping of β_{M1}(Q^{2}) in the low-Q^{2} region.Entities:
Year: 2019 PMID： 31765208 DOI： 10.1103/PhysRevLett.123.192302
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161