Changes between Version 2 and Version 3 of topBSM
- Timestamp:
- Sep 3, 2013, 8:48:45 PM (11 years ago)
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topBSM
v2 v3 1 1 == Top Quark Decay to a Higgs and a Light Quark Operator == 2 2 3 ### Motivation 3 === Motivation === 4 4 5 5 Neutral Flavor Changing couplings are absent in the Standard Model at tree … … 74 74 of the form $c_i\frac{m_t^2}{\Lambda^2}$. 75 75 76 ### Implementation and Validation 76 === Implementation and Validation === 77 77 78 78 The implementation is a straightforward transcription of the Lagrangian into … … 85 85 == Beyond-SM Operators with the Top Quark == 86 86 87 ### Motivation 87 === Motivation === 88 88 89 89 This model is a reimplementation of the model behind the following paper: … … 107 107 masses. 108 108 109 ### Spin Zero, Color Singlet Particle 109 === Spin Zero, Color Singlet Particle === 110 110 111 111 The name used in [@frederix2009top] for this resonance is `S0` for "color … … 206 206 }}} 207 207 208 #### Validation of the Model 208 ==== Validation of the Model ==== 209 209 210 210 The first step is to compare the old and the new implementations through the … … 229 229 interest. 230 230 231 ### Spin Zero, Color Octet Particle 231 === Spin Zero, Color Octet Particle === 232 232 233 233 The name for this resonance is `O0` for "color … … 276 276 substituted couplings and masses. 277 277 278 #### Validation of the Model 278 ==== Validation of the Model ==== 279 279 280 280 As with `S0` a patch is necessary before one can proceed with validation in the … … 287 287 build-in tools in `FeynRules` and `MadGraph5`. 288 288 289 ### Spin One, Color Singlet Particle 289 === Spin One, Color Singlet Particle === 290 290 291 291 The name for this resonance is `S1`. It has both vector and axial couplings to … … 321 321 The width of the particle is calculated and provided in the model as well. 322 322 323 #### Validation of the Model 323 ==== Validation of the Model ==== 324 324 325 325 Besides the basic correctness tests provided by `FeynRules` and `MadGraph5` the … … 332 332 well. 333 333 334 ### Spin One, Color Octet Particle 334 === Spin One, Color Octet Particle === 335 335 336 336 The name for this resonance is `O1`. The need for a `FeynRules` version of it … … 355 355 The width of the particles is calculated and provided in the model as well. 356 356 357 #### Validation of the Model 357 ==== Validation of the Model ==== 358 358 359 359 Similar models are discussed in [@choudhury2007top] and [@antunano2008top]. … … 372 372 373 373 374 #### Technical Constraints 374 ==== Technical Constraints ==== 375 375 376 376 During the implementation of this model a bug in the canonicalization routines … … 383 383 `FeynRules 1.7.178` or later is necessary. 384 384 385 ## General Technical Constraints 386 387 ### Required Versions 385 == General Technical Constraints == 386 387 === Required Versions === 388 388 389 389 As was mentioned above, the minimal version of `FeynRules` in which the models … … 399 399 `perl -pi -e 's/goldstone/GoldstoneBoson/g' ./models/topBSM_UFO/particles.py`. 400 400 401 ###Setting Mass Ranges401 === Setting Mass Ranges 402 402 403 403 The calculation of the widths of different particles (especially `S0` and `O0`) … … 409 409 `FeynRules` and not from `MadGraph5`. 410 410 411 # Annex 412 413 ## Patching the `standalone` Mode 411 = Annex = 412 413 == Patching the `standalone` Mode == 414 414 415 415 In `standalone` mode couplings are evaluated only once, before generating a … … 421 421 called after each generation of random phase space points. A patch that does 422 422 this automatically is provided with the models. 423 424 == References == 425 426 @article{zhang2013top, 427 title={Top-quark decay into Higgs and a light quark at NLO in QCD}, 428 author={Zhang, Cen and Maltoni, Fabio}, 429 journal={arXiv preprint arXiv:1305.7386}, 430 year={2013} 431 } 432 433 @article{frederix2009top, 434 title={Top pair invariant mass distribution: a window on new physics}, 435 author={Frederix, Rikkert and Maltoni, Fabio}, 436 journal={Journal of High Energy Physics}, 437 volume={2009}, 438 number={01}, 439 pages={047}, 440 year={2009}, 441 publisher={IOP Publishing} 442 } 443 444 @article{grzadkowski2010dimension, 445 title={Dimension-six terms in the standard model Lagrangian}, 446 author={Grzadkowski, B and Iskrzynski, M and Misiak, M and Rosiek, J}, 447 journal={Journal of High Energy Physics}, 448 volume={2010}, 449 number={10}, 450 pages={1--18}, 451 year={2010}, 452 publisher={Springer} 453 } 454 455 @article{choudhury2007top, 456 title={Top production at the Tevatron/LHC and nonstandard, strongly interacting spin one particles}, 457 author={Choudhury, Debajyoti and Godbole, Rohini M and Singh, Ritesh K and Wagh, Kshitij}, 458 journal={Physics Letters B}, 459 volume={657}, 460 number={1}, 461 pages={69--76}, 462 year={2007}, 463 publisher={Elsevier} 464 } 465 466 @article{antunano2008top, 467 title={Top quarks, axigluons, and charge asymmetries at hadron colliders}, 468 author={Antunano, Oscar and K{\"u}hn, Johann H and Rodrigo, German}, 469 journal={Physical Review D}, 470 volume={77}, 471 number={1}, 472 pages={014003}, 473 year={2008}, 474 publisher={APS} 475 } 476 477 @article{falkowski2012axigluon, 478 title={AxigluonCom - an axigluon FeynRules model}, 479 author={A.Falkowski}, 480 year={2012}, 481 publisher={APS} 482 } 483 484 @article{deutschmann2012trileptons, 485 title={Trileptons at the LHC in the Standard Model and Beyond}, 486 author={Nicolas Deutschmann}, 487 year={2012} 488 } 489 490 @article{christensen2009feynrules, 491 title={FeynRules--Feynman rules made easy}, 492 author={Christensen, Neil D and Duhr, Claude}, 493 journal={Computer Physics Communications}, 494 volume={180}, 495 number={9}, 496 pages={1614--1641}, 497 year={2009}, 498 publisher={Elsevier} 499 } 500 501 @article{alwall2011madgraph, 502 title={MadGraph 5: going beyond}, 503 author={Alwall, Johan and Herquet, Michel and Maltoni, Fabio and Mattelaer, Olivier and Stelzer, Tim}, 504 journal={Journal of High Energy Physics}, 505 volume={2011}, 506 number={6}, 507 pages={1--40}, 508 year={2011}, 509 publisher={Springer} 510 } 511 512 @article{deutschmann2012monte, 513 title={Monte Carlo Simulation of electron positron pair to a mu and tau pairs}, 514 author={Nicolas Deutschmann, Christoph Charles, Stefan Krastanov}, 515 year={2012} 516 } 517 518