It is pointed out that a tensor four fermion interaction (uRσμνdL) (ermRσμννL) produces through radiative corrections an interaction of the structure (uRdL) (eRνL, which is stronly limited by the decay π-→e-ν. The latter limit translates then into an upper bound of the strength of the tensor interaction which is at least two orders of magnitude lower than the value claimed by a recent measurement of the decay π-→eνγ. Some aspects of a possible tensor interaction related to this bound are also discussed.
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I am thankfult o fan Kogan for bringingt o my at-tentiont he discussion\[ 1 ,2,4\ ] of the possiblete nsor interaction( 3 ). This work is supporteidn part by the DOE grantD E-AC02-83ER40105.