Changes between Version 14 and Version 15 of HeavyN

Ignore:
Timestamp:
02/22/16 14:29:41 (4 years ago)
Comment:

Including NLO information 01

Legend:

Unmodified
 v14 == SM + Type I Seesaw Mechanism == = SM + Heavy N at NLO in QCD = === Implementation Author === ==== Implementation Author ==== Richard Ruiz * University of Durham (IPPP) * richard.ruiz AT durham.ac.uk In collaboration with Daniel Alva and Tao Han. In collaboration with Daniel Alva and Tao Han and . === Model Description === The Type I Seesaw Model extends the Standard Model (SM) field content by introducing three right-handed (RH) neutrinos, which are singlets under the SM gauge symmetry (no color, weak isospin, or weak hypercharge charges), with each RH neutrino possessing one RH Majorana mass. After electroweak symmetry breaking, the effective Type I Seesaw Lagrangian with three heavy Majorana neutrinos ''N''i (for i=1,2,3) is given by [ [#Atre 1] ] == Model Description == This effective model extends the Standard Model (SM) field content by introducing three right-handed (RH) neutrinos, which are singlets under the SM gauge symmetry (no color, weak isospin, or weak hypercharge charges), with each RH neutrino possessing 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 1] ] {{{ #!latex }}} The mixing matrix elements V''lk'' parametrize the mixing between the (active) lepton flavor eigenstate ''l'' and the heavy mass eigenstate ''N''k that corresponds to mass mNk. The lepton number- and flavor-violating interactions of the model === Model Files === == QCD Corrections == 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. The UFO file, five massless quarks are assumed as are zero off-diagonal CKM matrix entries. For additional details, see [ [#Degrande 2] ] and references within. == Model Files == * [https://feynrules.irmp.ucl.ac.be/attachment/wiki/typeIseesaw/heavyN.fr heavyN.fr]:  Main model file. Relies on sm.fr (default FR model file) being declared elsewhere. === List of analyses that have used the model file === * Please email me to update this space. * Please email to update this space. [=#Atre] [1] A. Atre, T. Han, S. Pascoli and B. Zhang, The Search for Heavy Majorana Neutrinos, JHEP '''0905''', 030 (2009)  arXiv:0901.3589 [hep-ph] [=#Alva] [2] D. Alva, T. Han, R. Ruiz, Heavy Majorana neutrinos from {{{#!latex $W\gamma$}}} fusion at hadron colliders, JHEP '''1502''', 072 (2015), arXiv:1411.7305 [hep-ph] [=#Degrande] [2] C. Degrande, O. Mattelear, R. Ruiz, J. Turner, arXiv:1602.00000 [hep-ph] [=#Alva] [3] D. Alva, T. Han, R. Ruiz, Heavy Majorana neutrinos from {{{#!latex $W\gamma$}}} fusion at hadron colliders, JHEP '''1502''', 072 (2015), arXiv:1411.7305 [hep-ph]