Comment on ZZ′ mixing in extended gauge theories

XIAO-GANG HE2018-09-102018-09-101991http://www.scopus.com/inward/record.url?eid=2-s2.0-0001350201&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/293921Comment on ZZ′ mixing in extended gauge theoriesjournal article10.1016/0370-2693(91)90901-22-s2.0-0001350201