Changes between Version 7 and Version 8 of HiggsCharacterisation
 Timestamp:
 06/25/13 18:18:31 (7 years ago)
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HiggsCharacterisation
v7 v8 1 == The Higgs Characterization model == 1 == The Higgs Characterisation model == 2 2 3 === Authors === 3 4 * Priscila de Aquino & Kentarou Mawatari 4 5 * Affiliation: Vrije Universiteit Brussel 5 * Emails: paquino @ vub.ac.be & kentarou.mawatari @ vub.ac.be 6 6 * Emails: kentarou.mawatari @ vub.ac.be 7 7 8 8 === Description of the model === 9 9 10 This is the model file for the characterization of a (125 GeV) resonance. We present a general implementation of particles with different spin/parity coupling to the SM particles. 10 This is a model file for the characterisation of the boson recently discovered at the LHC. 11 Our effective lagrangian consists of the SM (except for the Higgs itself), expressed through the physical degrees of freedom present below the EWSB scale, plus a new bosonic state X(J^P^) with spin/parity assignments J^P^ = 0^+^, 0^^, 1^+^, 1^^, and 2^+^. The new state can couple to SM particles via interactions of the lowest possible dimensions. In addition, the state 0^+^ is allowed to mix with the 0^^ one, and can interact with SM particles with higherdimensional operators beyond those of the SM. See more details in 11 12 12 Particles introduced within this model file: X0, X1 and X2.13 [arXiv:1306.XXXX] : P. Artoisenet, P. de Aquino, F. Demartin, R. Frederix, S. Frixione, F. Maltoni, M. K. Mandal, P. Mathews, K. Mawatari, V. Ravindran, S. Seth, P. Torrielli, M. Zaro, "xxxx". 13 14 14 * For requesting a 0+ particle, the user must choose ca=1;15 * For a 0 particle, ca=0;16 * For a 1 particle, kfa, kv1, kv2, kv3 !=0;17 * For a 1+ particle, kfb, kv4, kv5 !=0;18 * For a 2+ with the lowest dimensional (dim5) operators, kf, kv, ka, kg !=0;19 * For a 2+ with higher dimensional (dim7) operators, kv1, ka1, kg1 !=0;20 * For a 2 particle, kv2, ka2, kg2 != 0.21 15 22 Notice that ca (and sa) stands for cos[alpha] (and sin[alpha]) and allows the user to have a mix 0 0+ state: X0 = cos[alpha] 0+ + sin[alpha] 0 16 === Model files === 17 18 * HiggsCharacterisation.fr : the main model file. 19 * SM_HC.fr : This model requires the modified Standard Model implementation of FeynRules. 20 * Massless.rst, Cabibbo.rst : SM restriction files. 21 * HC.nb : this is an example Mathematica notebook that loads the model, calculates the Feynman rules and extract the model files within the UFO format. 22 * HiggsCharac_UFO.tar.gz : The model files in UFO format (for MadGraph 5). 23 23 24 24 The present model file contains parts of the following existing FR model files: … … 34 34 * 04.04.2013  v1.1  Added the CPodd Yukawa terms in the X0 lagrangian and modified the X2 HD lagrangian to be proportional to 1/Lambda^3 35 35 * 15.04.2013  v2.0  Fixed a bug for the X2 lowest dimensional interactions with massive gauge bosons. Parametrization for X0 modified. 36 * 28.05.2013  v2.1 (UFO)  Fixed a bug for the X0 coupling to the massive vector bosons (SM couplings recovered) 36 * 28.05.2013  v2.1  Fixed a bug for the X0 coupling to the massive vector bosons (SM couplings recovered) 37 * 27.06.2013  v3.0  version for the paper [arXiv:1306.XXXX]. 37 38 