2017:groups:np:llpsm
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2017:groups:np:llpsm [2017/06/16 14:55] sabine.kraml |
2017:groups:np:llpsm [2017/06/20 14:09] andre.lessa |
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| - | =====Simplified models for long-lived particles===== | + | ====== Simplified models for long-lived particles ====== |
| - | People interested: Nishita Desai, Stefania Gori, Andreas Goudelis, Sabine Kraml, Andre Lessa, Matthew McCullough, Dipan Sengupta, Benjamin Fuks, Eric Conte, Amit Chakraborty, Abhishek Iyer, Daniele Barducci, José Zurita | + | People interested: Nishita Desai, Stefania Gori, Andreas Goudelis, Sabine Kraml, Andre Lessa, Matthew McCullough, Dipan Sengupta, Benjamin Fuks, Eric Conte, Amit Chakraborty, Abhishek Iyer, Daniele Barducci, José Zurita, Jose Miguel No, Biplob Bhattacherjee, Shankha Banerjee, Haiying Cai, Sezen Sekmen |
| Discussions: | Discussions: | ||
| Line 8: | Line 8: | ||
| Topics: | Topics: | ||
| - | ==== Difficulties of recasting LLP searches ==== | + | ===== Difficulties of recasting LLP searches ===== |
| * See references below. | * See references below. | ||
| Line 16: | Line 16: | ||
| * Simplified recasting? Efficiencies as a function of (few) relevant kinematical variables | * Simplified recasting? Efficiencies as a function of (few) relevant kinematical variables | ||
| - | ==== Simplified models definitions ==== | + | References: |
| + | |||
| + | * **Simplified Models for Exotic BSM Searches**. Jan Heisig, Andre Lessa, Loic Quertenmont, [[https://arxiv.org/abs/1509.00473]] | ||
| + | * **Long-Lived Staus and Displaced Leptons at the LHC.** Jared A. Evans, Jessie Shelton, [[https://arxiv.org/abs/1601.01326]] | ||
| + | * **Prompt Signals and Displaced Vertices in Sparticle Searches for Next-to-Minimal Gauge Mediated Supersymmetric Models.** B. C. Allanach, Marcin Badziak, Giovanna Cottin, Nishita Desai, Cyril Hugonie, Robert Ziegler, [[https://arxiv.org/abs/1606.03099]] | ||
| + | |||
| + | |||
| + | ===== Simplified models definitions ===== | ||
| - | Three main signatures: long-lived charged track (long-lived charged particle), disappearing track (short-lived charged particle) and displaced vertices (short-lived neutral particle). The long-lived neutral gives standard missing energy signature. | + | Three main signatures: long-lived charged track (long-lived charged particle), disappearing track or kink track (short-lived charged particle) and displaced vertices (short-lived neutral particle). The long-lived neutral gives standard missing energy signature. |
| * **MadGraph implementations:** | * **MadGraph implementations:** | ||
| Line 25: | Line 32: | ||
| * **Inclusive simplified models:** only the LLP branch topology and decay is relevant? | * **Inclusive simplified models:** only the LLP branch topology and decay is relevant? | ||
| - | ==== Efficiencies ==== | + | ===== Efficiencies ===== |
| * Computing efficiencies as a function of the LLP kinematics and lifetime | * Computing efficiencies as a function of the LLP kinematics and lifetime | ||
| Line 32: | Line 39: | ||
| * Demonstrate usefulness to motivate experimentalists to provide efficiencies | * Demonstrate usefulness to motivate experimentalists to provide efficiencies | ||
| - | === Efficiencies wishlist === | + | __Efficiencies wishlist__ |
| - **Displaced vertices:** e, mu eff(d0, pT); jets eff(pT, ctau) | - **Displaced vertices:** e, mu eff(d0, pT); jets eff(pT, ctau) | ||
| Line 38: | Line 45: | ||
| - **LL charged particles:** eff(pT, beta, eta, ctau) | - **LL charged particles:** eff(pT, beta, eta, ctau) | ||
| - | Question: What is the dependence on isolation? Do we need efficiencies for different isolation criteria? | + | Q: What is the dependence on isolation? Do we need efficiencies for different isolation criteria? |
| - | ==== Triggering ==== | + | ===== Triggering ===== |
| * See Tuesday morning talks at [[https://indico.cern.ch/event/607314/timetable/ | April LLP workshop]] at CERN | * See Tuesday morning talks at [[https://indico.cern.ch/event/607314/timetable/ | April LLP workshop]] at CERN | ||
| - | ==== Cross talks ==== | + | ===== Cross talks ===== |
| * Higgs group is interested in exotic decays into LLPs | * Higgs group is interested in exotic decays into LLPs | ||
| + | * Interplay with LHCb searches | ||
| - | ==== Useful references ==== | ||
| - | * **Simplified Models for Exotic BSM Searches**. Jan Heisig, Andre Lessa, Loic Quertenmont, [[https://arxiv.org/abs/1509.00473]] | + | ===== Current Experimental Analyses ===== |
| - | * **Long-Lived Staus and Displaced Leptons at the LHC.** Jared A. Evans, Jessie Shelton, [[https://arxiv.org/abs/1601.01326]] | + | |
| - | * **Prompt Signals and Displaced Vertices in Sparticle Searches for Next-to-Minimal Gauge Mediated Supersymmetric Models.** B. C. Allanach, Marcin Badziak, Giovanna Cottin, Nishita Desai, Cyril Hugonie, Robert Ziegler, [[https://arxiv.org/abs/1606.03099]] | + | |
| - | + | ||
| - | ==== Current Experimental Analyses ==== | + | |
| Note: Many ATLAS 13 TeV analyses notes inaccessible without CERN credentials | Note: Many ATLAS 13 TeV analyses notes inaccessible without CERN credentials | ||
| CMS summary of the searches https://indico.cern.ch/event/550030/contributions/2417789/attachments/1432466/2201005/Antonelli_Aspen2017_CMSLLP.pdf | CMS summary of the searches https://indico.cern.ch/event/550030/contributions/2417789/attachments/1432466/2201005/Antonelli_Aspen2017_CMSLLP.pdf | ||
| + | |||
| + | |||
| + | CMS efficiency parametrisation [[https://twiki.cern.ch/twiki/bin/view/CMSPublic/DisplacedSusyParametrisationStudyForUser]] | ||
| ^ ** Experiment ** | ** Energy ** | ** Type **| ** Analysis ** | | ^ ** Experiment ** | ** Energy ** | ** Type **| ** Analysis ** | | ||
| ^ ATLAS | 13 TeV | DV| Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in 13 TeV pp collisions with the ATLAS detector [[http://inspirehep.net/record/1589909]]| | ^ ATLAS | 13 TeV | DV| Search for long-lived, massive particles in events with displaced vertices and missing transverse momentum in 13 TeV pp collisions with the ATLAS detector [[http://inspirehep.net/record/1589909]]| | ||
| + | ^ ATLAS | 13 TeV | DV| Search for long-lived neutral particles decaying in the hadronic calorimeter of ATLAS at TeV in 3.2/fb of data[[https://cds.cern.ch/record/2219571/files/ATLAS-CONF-2016-103.pdf]]| | ||
| + | ^ ATLAS | 13 TeV | DV| Search for long-lived neutral particles decaying into displaced lepton-jets in proton–proton collisions at 13 TeV with the ATLAS detector [[http://inspirehep.net/record/1480022/files/ATLAS-CONF-2016-042.pdf]]| | ||
| ^ ATLAS | 8 TeV | DT | Search for charginos nearly mass-degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √s = 8 TeV with the ATLAS detector [[ http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2013-01/]] | | ^ ATLAS | 8 TeV | DT | Search for charginos nearly mass-degenerate with the lightest neutralino based on a disappearing-track signature in pp collisions at √s = 8 TeV with the ATLAS detector [[ http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2013-01/]] | | ||
| ^ ATLAS | 8 TeV | Diss. Trk | Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at sqrt(s)=8 TeV with the ATLAS detector [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2014-02/ ]]| | ^ ATLAS | 8 TeV | Diss. Trk | Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at sqrt(s)=8 TeV with the ATLAS detector [[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2014-02/ ]]| | ||
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| ^ CMS | 7 & 8 TeV | Tracks | Searches for Long-lived Charged Particles [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/EXO-12-026/index.html]] | | ^ CMS | 7 & 8 TeV | Tracks | Searches for Long-lived Charged Particles [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/EXO-12-026/index.html]] | | ||
| ^ CMS | 8 TeV | Disp. jets | Search for long-lived neutral particles decaying to dijets [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/EXO-12-038/index.html]] | | ^ CMS | 8 TeV | Disp. jets | Search for long-lived neutral particles decaying to dijets [[http://cms-results.web.cern.ch/cms-results/public-results/preliminary-results/EXO-12-038/index.html]] | | ||
| + | |||
| + | ===== Simplified models definitions ===== | ||
| + | Ideas for simplified models and analysis: | ||
| + | * Displaced tops: SUSY models with stop NLSP, simplified models. | ||
| + | * Disappearing R-hadrons: SUSY models with coloured NLSP and small mass splittings. | ||
2017/groups/np/llpsm.txt · Last modified: 2018/01/31 10:33 by giovanna.cottin
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