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Unformatted text preview: 1 ANOMALOUS W/Z QUARTIC COUPLINGS Revised March 2006 by C. Caso (University of Genova) and A. Gurtu (Tata Institute). The Standard Model predictions for W W W W , W W ZZ , W W Z , W W , and ZZ couplings are small at LEP, but expected to become important at a TeV Linear Collider. Outside the Standard Model framework such possible couplings, a , a c , a n , are expressed in terms of the following dimension-6 operators [1,2]; L 6 = e 2 16 2 a F F W W L c 6 = e 2 16 2 a c F F W W L n 6 = i e 2 16 2 a n ijk W ( i ) W ( j ) W ( k ) F e L 6 = e 2 16 2 e a F e F W W e L n 6 = i e 2 16 2 e a n ijk W ( i ) W ( j ) W ( k ) e F where F, W are photon and W fields, L 6 and L c 6 conserve C , P separately ( e L 6 conserves only C ) and generate anomalous W + W- and ZZ couplings, L n 6 violates CP ( e L n 6 violates both C and P ) and generates an anomalous W...
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