The strangeness magnetic moment of the proton in the chiral quark model

The strangeness magnetic moment of the proton is shown to be small in the c hiral quark model. The dominant loop contribution is due to kaons. The K* l oop contributions are proportional to the difference between the strange an d light constituent quark masses or m(K*)(-2) and therefore small. The loop fluctuations that involve radiative transitions between K* mesons and kaon s are small, when the cutoff scale in the loops is taken to be close to the chiral symmetry restoration scale. The net loop amplitude contribution to the strangeness magnetic moment of the proton is about -0.05, which falls w ithin the uncertainty range of the experimental value. (C) 2000 Elsevier Sc ience B.V. All rights reserved.