1 / 9

Simulation Issues for Top

Simulation Issues for Top. The precision of all our measurements is limited by the simulation… !. Systematics. An excellent simulation (generators aside) is a necessary condition for studying (and reducing) systematic uncertainties Bites us at all levels: Acceptances & limits

sailor
Télécharger la présentation

Simulation Issues for Top

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Simulation Issues for Top • The precision of all our measurements is limited by the simulation… ! Jaco Konigsberg, 8/28/03, Sim. meeting

  2. Systematics • An excellent simulation (generators aside) is a necessary condition for studying (and reducing) systematic uncertainties • Bites us at all levels: • Acceptances & limits • Tails of distributions (i.e. MET in DY) • “Scale factors” galore • Id (isolation) • Etc. Jaco Konigsberg, 8/28/03, Sim. meeting

  3. Mass, for example… • Goal for jet relative response: Simulation Data control of: • Geometry of calorimeters • Single particle response (hadrons, em particles, e/p, non-linearities etc.) • Material - all material ! - • Geant --> Geisha • Min bias [low level radiation response] mult. Int. Jaco Konigsberg, 8/28/03, Sim. meeting

  4. Delta M_top Delta Rel(Data-Sim) Jaco Konigsberg, 8/28/03, Sim. meeting

  5. Another example: B-tagging • Silicon simulation “perfect” or else: • Scale factors with large uncertainties (10-15% right now) • How do we go to the few % level? • Alignments • Charge dep. • Hit resolutions (also COT tracking resolution) • Readout error • Different configuration options - make easy to study Jaco Konigsberg, 8/28/03, Sim. meeting

  6. And another: collision region/triggers • Trigsim as a useful tool • Trigger efficiency dependences in data to be modeled correctly in sim. • High pt e and mu: eta/phi , isolation, dependence • All-hadronic SUMET trigger: model kinematic biases • {x,y,z} vs. time --> DB --> Sim. Jaco Konigsberg, 8/28/03, Sim. meeting

  7. Cont. • Not news but • Who exactly works on it [responsible] and when? • How do we know it is right [or at least it’s status] at any given moment? Jaco Konigsberg, 8/28/03, Sim. meeting

  8. Who/ How • Who exactly works on it? [responsible] and when? • Sim + physics groups… hmmm • Need to get into a positive feedback loop • Fast feedback, both ways, task forces • Need detector experts, per detector, in the sim. Group • The only successes, am I right?, are when this is the case Jaco Konigsberg, 8/28/03, Sim. meeting

  9. transparency • How do we know it’s right at any given moment [and keep it right?] • Figures of merit, per release, agreed upon by the sim & detector & physics groups • Are the tau-id variables in sim. 5.10.n ok? • Two clicks away on the web Jaco Konigsberg, 8/28/03, Sim. meeting

More Related