Change Details

The following EvtGen models have problems or are superseded by others and should probably be removed: | Model | Description | Reason | LHCb DecFiles impact | | `EvtBHadronic` | Attempt at implementing hadronic decay amplitudes | Experimental code that is not recommended to be used | None | | `EvtMultibody` | Implements a crude Dalitz plot model using only simple Breit-Wigners | Unknown decay file parameter syntax and superseded by other working Dalitz (and 4-body) models | None | | `EvtMBreitWigner`, `EvtMHelAmp`, `EvtMNode`, `EvtMParticle`, `EvtMRes`, `EvtMTree` and `EvtMTrivialLS` | Helper classes for `EvtMultibody` | Not needed after removal of `EvtMultibody` | None | | `EvtLambdaB2LambdaV` | LambdaB to Lambda V, where V = J/psi, rho or omega (LHCb 2007) | Kinematic variables that divide by pT which is zero in the LambdaB frame; invariant mass distributions exponentially increase up to an upper threshold | None | | `EvtLb2Lll` | LambdaB to Lambda ell ell | Superseded by the `EvtRareLbToLll` model | None | | `EvtVPHOtoV` | Virtual photon to Vector | Not used in `EvtModelReg` | None | | `EvtVPHOtoVISR` | Virtual photon to Vector gamma | Not used in `EvtModelReg` and appears to be superseded by `EvtVPHOtoVISRHi` (which is available) | None | | `EvtKstarstargamma` | Kstar radiative decays | Code is broken and appears difficult to fix: see [[ https://phab.hepforge.org/T178 | T178 ]] | None | | `EvtbsToLLLL` | Bs to 4 ell decays, ell = e or mu | Bug fix with lepton amplitude loop suggests there could be other problems: [[ https://phab.hepforge.org/T160 | T160 ]] | 2 files using `BQTOLLLL` | | `EvtbsToLLLLHyperCP` | Bs to 4 ell decays HyperCP model, ell = e or mu, [[ https://arxiv.org/abs/1112.5230 | arXiv:1112.5230 ]] | Model regularly fails accept/reject: [[ https://phab.hepforge.org/T160 | T160 ]] | 4 files using `BQTOLLLLHYPERCP` | | `Evtbs2llGammaISRFSR` | Bs to gamma ell ell decays, ell = e or mu | Model regularly fails accept/reject: [[ https://phab.hepforge.org/T160 | T160 ]] | 13 files using `BSTOGLLISRFSR` |

The following EvtGen models have problems or are superseded by others and should probably be removed: | Model | Description | Reason | LHCb DecFiles impact | | `EvtBHadronic` | Attempt at implementing hadronic decay amplitudes | Experimental code that is not recommended to be used | None | | `EvtMultibody` | Implements a crude Dalitz plot model using only simple Breit-Wigners | Unknown decay file parameter syntax and superseded by other working Dalitz (and 4-body) models | None | | `EvtMBreitWigner`, `EvtMHelAmp`, `EvtMNode`, `EvtMParticle`, `EvtMRes`, `EvtMTree` and `EvtMTrivialLS` | Helper classes for `EvtMultibody` | Not needed after removal of `EvtMultibody` | None | | `EvtLambdaB2LambdaV` | LambdaB to Lambda V, where V = J/psi, rho or omega (LHCb 2007) | Kinematic variables that divide by pT which is zero in the LambdaB frame; invariant mass distributions exponentially increase up to an upper threshold | None | | `EvtLb2Lll` | LambdaB to Lambda ell ell | Superseded by the `EvtRareLbToLll` model | None | | `EvtVPHOtoV` | Virtual photon to Vector | Not used in `EvtModelReg` | None | | `EvtVPHOtoVISR` | Virtual photon to Vector gamma | Not used in `EvtModelReg` and appears to be superseded by `EvtVPHOtoVISRHi` (which is available) | None | | `EvtKstarstargamma` | Kstar radiative decays | Code is broken and appears difficult to fix: see [[ https://phab.hepforge.org/T178 | T178 ]] | None | | `EvtbsToLLLL` | Bs to 4 ell decays, ell = e or mu | Bug fix with lepton amplitude loop suggests there could be other problems: [[ https://phab.hepforge.org/T160 | T160 ]] | 2 files using `BQTOLLLL` | | `EvtbsToLLLLHyperCP` | Bs to 4 ell decays HyperCP model, ell = e or mu, [[ https://arxiv.org/abs/1112.5230 | arXiv:1112.5230 ]] | Model regularly fails accept/reject: [[ https://phab.hepforge.org/T160 | T160 ]] | 4 files using `BQTOLLLLHYPERCP` | | `Evtbs2llGammaISRFSR` | Bs to gamma ell ell decays, ell = e or mu | Model regularly fails accept/reject: [[ https://phab.hepforge.org/T160 | T160 ]] | 13 files using `BSTOGLLISRFSR` | | `EvtPropSLPole` | semi-leptonic decays | `SLPOLE` should be used in preference | None |

The following EvtGen models have problems or are superseded by others and should probably be removed: | Model | Description | Reason | LHCb DecFiles impact | | `EvtBHadronic` | Attempt at implementing hadronic decay amplitudes | Experimental code that is not recommended to be used | None | | `EvtMultibody` | Implements a crude Dalitz plot model using only simple Breit-Wigners | Unknown decay file parameter syntax and superseded by other working Dalitz (and 4-body) models | None | | `EvtMBreitWigner`, `EvtMHelAmp`, `EvtMNode`, `EvtMParticle`, `EvtMRes`, `EvtMTree` and `EvtMTrivialLS` | Helper classes for `EvtMultibody` | Not needed after removal of `EvtMultibody` | None | | `EvtLambdaB2LambdaV` | LambdaB to Lambda V, where V = J/psi, rho or omega (LHCb 2007) | Kinematic variables that divide by pT which is zero in the LambdaB frame; invariant mass distributions exponentially increase up to an upper threshold | None | | `EvtLb2Lll` | LambdaB to Lambda ell ell | Superseded by the `EvtRareLbToLll` model | None | | `EvtVPHOtoV` | Virtual photon to Vector | Not used in `EvtModelReg` | None | | `EvtVPHOtoVISR` | Virtual photon to Vector gamma | Not used in `EvtModelReg` and appears to be superseded by `EvtVPHOtoVISRHi` (which is available) | None | | `EvtKstarstargamma` | Kstar radiative decays | Code is broken and appears difficult to fix: see [[ https://phab.hepforge.org/T178 | T178 ]] | None | | `EvtbsToLLLL` | Bs to 4 ell decays, ell = e or mu | Bug fix with lepton amplitude loop suggests there could be other problems: [[ https://phab.hepforge.org/T160 | T160 ]] | 2 files using `BQTOLLLL` | | `EvtbsToLLLLHyperCP` | Bs to 4 ell decays HyperCP model, ell = e or mu, [[ https://arxiv.org/abs/1112.5230 | arXiv:1112.5230 ]] | Model regularly fails accept/reject: [[ https://phab.hepforge.org/T160 | T160 ]] | 4 files using `BQTOLLLLHYPERCP` | | `Evtbs2llGammaISRFSR` | Bs to gamma ell ell decays, ell = e or mu | Model regularly fails accept/reject: [[ https://phab.hepforge.org/T160 | T160 ]] | 13 files using `BSTOGLLISRFSR` | | `EvtPropSLPole` | semi-leptonic decays | `SLPOLE` should be used in preference | None |