Changes between Version 32 and Version 33 of HeavyN
 Timestamp:
 11/14/18 07:02:24 (20 months ago)
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HeavyN
v32 v33 3 3 === Contact Author === 4 4 Richard Ruiz 5 * Universit y of Durham (IPPP)6 * richard.ruiz AT durham.ac.uk5 * Universite Catholique de Louvain 6 * richard.ruiz AT uclouvain.be 7 7 8 In collaboration with 9 Daniel Alva and Tao Han [ [#Alva 1] ], and Celine Degrande, Olivier Mattelear, and Jessica Turner [ [#Degrande 2] ]. 8 In collaboration with: 9 Daniel Alva and Tao Han [ [#Alva 1] ]; 10 Celine Degrande, Olivier Mattelear, and Jessica Turner [ [#Degrande 2] ]; 11 and Silvia Pascoli and Cedric Weiland [ [#Pascoli] ]. 10 12 11 13 12 14 == Model Description == 13 This effective model extends the Standard Model (SM) field content by introducing three righthanded (RH) neutrinos, which are singlets under the SM gauge symmetry (no color, weak isospin, or weak hypercharge charges). Each RH neutrino possesses one RH Majorana mass. After electroweak symmetry breaking, the Lagrangian with three heavy Majorana neutrinos ''N''i (for i=1,2,3) is given by [ [#Atre 3] ] 15 === Majorana === 16 This effective/simplified model extends the Standard Model (SM) field content by introducing three righthanded (RH) neutrinos, which are singlets under the SM gauge symmetry (no color, weak isospin, or weak hypercharge charges). Each RH neutrino possesses one RH Majorana mass. After electroweak symmetry breaking, the Lagrangian with three heavy Majorana neutrinos ''N''i (for i=1,2,3) is given by [ [#Atre 3] ] 14 17 {{{ 15 18 #!latex … … 44 47 The lepton number and flavorviolating interactions of the Lagrangian allow for modeling of the Type I, Inverse, and Linear seesaw mechanisms at both lepton, hadron, and leptohadron colliders. 45 48 49 === Dirac === 50 The Dirac variant of the HeavyN model file contains the same interaction Lagrangian as the Majorana case. The heavy Dirac neutrinos' kinetic and mass terms are 51 {{{ 52 #!latex 53 \begin{equation} 54 \mathcal{L}_{N} = \overline{N_k} i\!\not\!\partial N_k  m_{N_k} \overline{N_k}N_k, \quad k=1,\dots,3. 55 \end{equation} 56 }}} 57 46 58 == QCD Corrections == 47 59 The above Lagrangian with Goldstone boson couplings and in the Feynman Gauge was implemented into FeynRules 2.3.10. QCD renormalization and R2 rational counter terms were determined using NLOCT 1.02 and FeynArts 3.8. Feynman rules were collected into a single UFO, available below. … … 52 64 53 65 == Model Files == 66 67 === Majorana === 54 68 * [https://feynrules.irmp.ucl.ac.be/attachment/wiki/HeavyN/SM_HeavyN_NLO_UFO.tgz SM_HeavyN_NLO_UFO.tgz]: Standalone UFO folder. 55 69 … … 61 75 62 76 * [https://feynrules.irmp.ucl.ac.be/attachment/wiki/HeavyN/SM_HeavyN_FilesWithUFO.tgz SM_HeavyN_FilesWithUFO.tgz]: Combination of SM_HeavyN_NLO_UFO.tgz and SM_HeavyN_Files.tgz. 77 78 === Dirac === 63 79 64 80