Search for Dark Matter in a Coannihilation Codex Model With CMS - - PowerPoint PPT Presentation

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Search for Dark Matter in a Coannihilation Codex Model With CMS - - PowerPoint PPT Presentation

Feb 18, 2023 266 likes •411 views

FERMILAB-SLIDES-2018-133-E This document was prepared by CMS collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi

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SLIDE 1

Search for Dark Matter in a Coannihilation Codex Model With CMS Detector

Orgho Neogi for the CMS Collaboration

FERMILAB-SLIDES-2018-133-E This document was prepared by CMS collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359.

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SLIDE 2

Properties of Dark matter: Cold Non-Baryonic Electrically Neutral Relic Density Ωh2 = 0.1198 ± 0.0026

Introduction

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SLIDE 3

General Classification of simplified Models Dark Matter (DM) & Coannihilation partner X Forms a pair of standard model particles Mediating Particle M

Coannihilation Codex

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DM + X SM1+SM2

M

Coannihilation Codex: arXiv:1510.03434 [hep-ph]

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SLIDE 4

Specific Model for Search

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LQ Unknown Particle SM or BSM LQ LQ

Resonance from LQ Decay ET from Dark Matter Soft (from off shell LQ Decay) DM DM

Coannihilation Codex: arXiv:1510.03434 [hep-ph]

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SLIDE 5

Coannihilation Condition

Relative mass splitting small Soft decay product Pair production of 1st generation LQ

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Δ= < 0.2

mX - mDM mDM

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SLIDE 6

CMS Detector

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SLIDE 7

Final Signature: High Pt Electron High Pt Jet High MET LQ e- + u LQ DM + X From CMS 2016 Data: √S = 13 TeV Lint = 35.9-1fb

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Analysis Signature

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SLIDE 8

Background (CMS Simulation): TT (Powheg) Single Top (Powheg) ZTT (Madgraph) W (Madgraph) QCD Signal (CMS Simulation): Privately produced using Madgraph Dataset: 2016 singleElectron Dataset

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Dataset

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SLIDE 9

Preselection Cuts

Electron: PT > 60 GeV & |η| < 2.5 Jet: PT > 100 GeV & |η| < 2.5 & LooseJetID MET: PT > 50 GeV & all MET filters Tau veto: PT > 20 GeV & |η| < 2.3 & LooseMVAID Bjet veto: PT > 20 GeV & |η| < 2.3 & Tight CSV Discriminant

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Leptoquark Transverse Mass

Taking the transverse mass of the leading lepton and leading jet gives us the leptoquark mass

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CMS Simulation Preselection applied

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SLIDE 11

Kinematics: Momentum of Lepton

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CMS Simulation Arbitrary normalization applied Preselection applied

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Kinematics: Momentum of Jet

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CMS Simulation Arbitrary normalization applied Preselection applied

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SLIDE 13

Kinematics: Missing Transverse Energy

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CMS Simulation Arbitrary normalization applied Preselection applied

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Summary

We have begun a search for interesting signature from a coannihilation codex model Kinematic features High Pt Lepton & High Pt Jet Missing ET Optimizing selection Hope to find something exciting in 2016 data

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