== Vector-leptoquark model == === Authors === * Michael J. Baker * UZH, Zurich * baker@physik.uzh.ch * Javier Fuentes-Martín * UZH, Zurich * fuentes@physik.uzh.ch * Matthias König * UZH, Zurich * koenigma@physik.uzh.ch * Gino Isidori * UZH, Zurich * isidori@physik.uzh.ch === Description of the model === This model is an extension of the SM, featuring a vector leptoquark (''U,,1,,~('''3''','''2'''),,2/3,,''), a colored vector (''G'~('''8''','''1'''),,0,,''), and a ''Z' '' (''Z'~('''1''','''1'''),,0,,'') as new heavy mediators. The implementation of the model is based on ''"High-p,,T,, Signatures in Vector-Leptoquark Models''" (arXiv:1901.10480). If you use our model file please cite this reference. === Model Files === [/attachment/wiki/LeptoQuark/vector_LQ.fr vector_LQ.fr]: This is the Feynrules model file for the vector leptoquark. [[BR]] [/attachment/wiki/LeptoQuark/coloron.fr coloron.fr]: This is the Feynrules model file for the vector color-octect.[[BR]] [/attachment/wiki/LeptoQuark/Zprime.fr Zprime.fr]: This is the Feynrules model file for the "Z'". === Model Restrictions === [/attachment/wiki/LeptoQuark/Massless.rst Massless.rst]: This restriction file set all the masses and Yukawas to zero, except for the ones of the top quark. === Instructions === The model is loaded by merging the model files {{{SM.fr}}}, {{{vector_LQ.fr}}}, {{{coloron.fr}}} and {{{Zprime.fr}}}. Alternatively, one exclude the model files {{{coloron.fr}}} or {{{Zprime.fr}}}, if the user is not interested in these mediators. The implementation allows for the use of the Feynman gauge in the SM.The switch between the two gauge is achieved via {{{FeynmanGauge = True/False}}} (see StandardModel). === Examples === [/attachment/wiki/LeptoQuark/model_gen.nb model_gen.nb]: This is an example Mathematica® notebook that loads the Feynrules model files and calculates UFO model. === Interfaces === This model implementation is known to work with the following interfaces: * [wiki:FeynArtsInterface FeynArts Interface] * [wiki:MadGraphInterface MadGraph Interface] === Validation === An alternative Feynrules implementation for the vector leptoquark model (but with interactions to left-handed SM fermions only) is available in https://lqnlo.hepforge.org. We have cross-checked our leptoquark implementation (with ''β,,33,, = 0'') against this one, finding a perfect agreement between the two. === UFO model === [/attachment/wiki/LeptoQuark/vector_LQ_UFO.tar.gz vector_LQ_UFO.tar.gz]: UFO model including the ''U,,1,,'', ''G' '' and ''Z' '' .