<i>N=4</i>remaining supersymmetry in a Kaluza-Klein monopole background in<i>D=11</i>supergravity theory

Abstract

Upon seven-torus compactification of eleven-dimensional supergravity, a Kaluza-Klein monopole is embedded into one U(1) group of the isometry group U(1${)}^{7}$. Four independent Killing spinors remain unbroken in this background.