wiki:Models/NTGC

Effective field theory for nTGC

Author : Celine Degrande

References :

  • C. Degrande, A basis of dimension-eight operators for anomalous neutral triple gauge boson interactions, arXiv:1308.6323

Description

This !MadGraph5 model is the implementation of the dimension-eight operators inducing neutral triple gauge boson couplings (nTGC). Namely, the model contains all the four dimension-eight operators that modify the neutral triple gauge boson vertices. Their coefficients can be set in the param_card.dat. The parameters in the param_card are the full coefficients, i.e. $C_i/\Lambda4$ and are in TeV$-2$. The name are self-explanatory, $C_{\widetilde{B}W}/\Lambda4$ is called CBtWL4, $C_{BW}/\Lambda4$ is called CBWL4 and similarly for $C_{WW}$ and $C_{BB}$. The new interaction has also an order NP (for new physics) which is the power of ($1/\Lambda4$) of the amplitude.

Operator Coefficient param_card name limit at 95% C.L.(TeV${-4}$)
$i H\dagger \widetilde{B}_{\mu\nu}W{\mu\rho}\{D_\rho,D\nu\} H$ $C_{\widetilde{B}W}/\Lambda4$ CBtWL4 [-47 , 47]
$i H\dagger B_{\mu\nu}W{\mu\rho}\{D_\rho,D\nu\} H$ $C_{BW}/\Lambda4$ CBWL4 [-114 , 113 ]
$i H\dagger W_{\mu\nu}W{\mu\rho}\{D_\rho,D\nu\} H$ $C_{WW}/\Lambda4$ CWWL4 [-45 , 48]
$i H\dagger B_{\mu\nu}B{\mu\rho}\{D_\rho,D\nu\} H$ $C_{BB}/\Lambda4$ CBBL4 [-99 , 101]

The limits have been obtained by inverting the values of the anomalous couplings from the PDG 2012 and JHEP 1301 (2013) 063.

Last modified 10 years ago Last modified on Jun 24, 2014, 3:01:28 PM

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