TY - JOUR
T1 - Nucleons with chiral loops
T2 - Electromagnetic polarizabilities
AU - Bernard, Véronique
AU - Kaiser, Norbert
AU - Meissner, Ulf G.
N1 - Funding Information:
* Work supported in part by Deutsche Forschungsgemeinschaft and by Schweizerischer National-fonds.
PY - 1992/4/6
Y1 - 1992/4/6
N2 - We investigate the electric (α) and magnetic (β) polarizabilities to one-loop order in chiral perturbation theory. Our calculation sheds light on the two most prominent empirical features, namely that (i) the sum of the magnetic and the electric polarizabilities of the neutron and the proton are approximately the same (αp + βp ≈ αn + βn) and (ii) that the proton and the neutron behave essentially as electric dipoles (αp,n ≫ βp,n). Furthermore, we discuss the connection between the nucleons' polarizabilities and the pion photoproduction processes.
AB - We investigate the electric (α) and magnetic (β) polarizabilities to one-loop order in chiral perturbation theory. Our calculation sheds light on the two most prominent empirical features, namely that (i) the sum of the magnetic and the electric polarizabilities of the neutron and the proton are approximately the same (αp + βp ≈ αn + βn) and (ii) that the proton and the neutron behave essentially as electric dipoles (αp,n ≫ βp,n). Furthermore, we discuss the connection between the nucleons' polarizabilities and the pion photoproduction processes.
UR - http://www.scopus.com/inward/record.url?scp=4243370001&partnerID=8YFLogxK
U2 - 10.1016/0550-3213(92)90436-F
DO - 10.1016/0550-3213(92)90436-F
M3 - Article
AN - SCOPUS:4243370001
SN - 0550-3213
VL - 373
SP - 346
EP - 370
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 2
ER -