# Changes between Version 2 and Version 3 of topBSM

Ignore:
Timestamp:
09/03/13 20:48:45 (7 years ago)
Comment:

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### Legend:

Unmodified
 v2 == Top Quark Decay to a Higgs and a Light Quark Operator == ### Motivation === Motivation === Neutral Flavor Changing couplings are absent in the Standard Model at tree of the form $c_i\frac{m_t^2}{\Lambda^2}$. ### Implementation and Validation === Implementation and Validation === The implementation is a straightforward transcription of the Lagrangian into == Beyond-SM Operators with the Top Quark == ### Motivation === Motivation === This model is a reimplementation of the model behind the following paper: masses. ### Spin Zero, Color Singlet Particle === Spin Zero, Color Singlet Particle === The name used in [@frederix2009top] for this resonance is S0 for "color }}} #### Validation of the Model ==== Validation of the Model ==== The first step is to compare the old and the new implementations through the interest. ### Spin Zero, Color Octet Particle === Spin Zero, Color Octet Particle === The name for this resonance is O0 for "color substituted couplings and masses. #### Validation of the Model ==== Validation of the Model ==== As with S0 a patch is necessary before one can proceed with validation in the build-in tools in FeynRules and MadGraph5. ### Spin One, Color Singlet Particle === Spin One, Color Singlet Particle === The name for this resonance is S1. It has both vector and axial couplings to The width of the particle is calculated and provided in the model as well. #### Validation of the Model ==== Validation of the Model ==== Besides the basic correctness tests provided by FeynRules and MadGraph5 the well. ### Spin One, Color Octet Particle === Spin One, Color Octet Particle === The name for this resonance is O1. The need for a FeynRules version of it The width of the particles is calculated and provided in the model as well. #### Validation of the Model ==== Validation of the Model ==== Similar models are discussed in [@choudhury2007top] and [@antunano2008top]. #### Technical Constraints ==== Technical Constraints ==== During the implementation of this model a bug in the canonicalization routines FeynRules 1.7.178 or later is necessary. ## General Technical Constraints ### Required Versions == General Technical Constraints == === Required Versions === As was mentioned above, the minimal version of FeynRules in which the models perl -pi -e 's/goldstone/GoldstoneBoson/g' ./models/topBSM_UFO/particles.py. ### Setting Mass Ranges === Setting Mass Ranges The calculation of the widths of different particles (especially S0 and O0) FeynRules and not from MadGraph5. # Annex ## Patching the standalone Mode = Annex = == Patching the standalone Mode == In standalone mode couplings are evaluated only once, before generating a called after each generation of random phase space points. A patch that does this automatically is provided with the models. == References == @article{zhang2013top, title={Top-quark decay into Higgs and a light quark at NLO in QCD}, author={Zhang, Cen and Maltoni, Fabio}, journal={arXiv preprint arXiv:1305.7386}, year={2013} } @article{frederix2009top, title={Top pair invariant mass distribution: a window on new physics}, author={Frederix, Rikkert and Maltoni, Fabio}, journal={Journal of High Energy Physics}, volume={2009}, number={01}, pages={047}, year={2009}, publisher={IOP Publishing} } @article{grzadkowski2010dimension, title={Dimension-six terms in the standard model Lagrangian}, author={Grzadkowski, B and Iskrzynski, M and Misiak, M and Rosiek, J}, journal={Journal of High Energy Physics}, volume={2010}, number={10}, pages={1--18}, year={2010}, publisher={Springer} } @article{choudhury2007top, title={Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles}, author={Choudhury, Debajyoti and Godbole, Rohini M and Singh, Ritesh K and Wagh, Kshitij}, journal={Physics Letters B}, volume={657}, number={1}, pages={69--76}, year={2007}, publisher={Elsevier} } @article{antunano2008top, title={Top quarks, axigluons, and charge asymmetries at hadron colliders}, author={Antunano, Oscar and K{\"u}hn, Johann H and Rodrigo, German}, journal={Physical Review D}, volume={77}, number={1}, pages={014003}, year={2008}, publisher={APS} } @article{falkowski2012axigluon, title={AxigluonCom - an axigluon FeynRules model}, author={A.Falkowski}, year={2012}, publisher={APS} } @article{deutschmann2012trileptons, title={Trileptons at the LHC in the Standard Model and Beyond}, author={Nicolas Deutschmann}, year={2012} } @article{christensen2009feynrules, title={FeynRules--Feynman rules made easy}, author={Christensen, Neil D and Duhr, Claude}, journal={Computer Physics Communications}, volume={180}, number={9}, pages={1614--1641}, year={2009}, publisher={Elsevier} } @article{alwall2011madgraph, title={MadGraph 5: going beyond}, author={Alwall, Johan and Herquet, Michel and Maltoni, Fabio and Mattelaer, Olivier and Stelzer, Tim}, journal={Journal of High Energy Physics}, volume={2011}, number={6}, pages={1--40}, year={2011}, publisher={Springer} } @article{deutschmann2012monte, title={Monte Carlo Simulation of electron positron pair to a mu and tau pairs}, author={Nicolas Deutschmann, Christoph Charles, Stefan Krastanov}, year={2012} }