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Title: Search for dark matter and supersymmetry in the vector boson fusion topology in proton-proton collisions at CMS

Abstract

A search for pair production of dark matter candidates and supersymmetry (SUSY) production with two jets in vector-boson fusion (VBF) topology is presented using data collected by the Compact Muon Solenoid (CMS) detector in proton-proton collisions at the Large Hadron Collider (LHC). Final states with no leptons are expected in pair production of dark matter particles or scalar quarks in SUSY compressed mass-spectra scenarios. Final states with low-energy leptons are expected in the production of charginos and neutralinos in SUSY compressed mass-spectra scenarios. Results for both zero and two lepton final states at 8 TeV are presented with brief prospects at 13 TeV.

Authors:
 [1];  [2]
  1. Texas A & M Univ., College Station, TX (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Texas A&M University at Qatar, Doha (Qatar)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1430661
Report Number(s):
FERMILAB-PUB-17-553-CMS
Journal ID: ISSN 1742-6588; 1610097
Grant/Contract Number:
AC02-07CH11359; SC0010813
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 869; Journal Issue: 1; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Celik, A., and Hernandez, A. M.C.. Search for dark matter and supersymmetry in the vector boson fusion topology in proton-proton collisions at CMS. United States: N. p., 2017. Web. doi:10.1088/1742-6596/869/1/012047.
Celik, A., & Hernandez, A. M.C.. Search for dark matter and supersymmetry in the vector boson fusion topology in proton-proton collisions at CMS. United States. doi:10.1088/1742-6596/869/1/012047.
Celik, A., and Hernandez, A. M.C.. Sat . "Search for dark matter and supersymmetry in the vector boson fusion topology in proton-proton collisions at CMS". United States. doi:10.1088/1742-6596/869/1/012047. https://www.osti.gov/servlets/purl/1430661.
@article{osti_1430661,
title = {Search for dark matter and supersymmetry in the vector boson fusion topology in proton-proton collisions at CMS},
author = {Celik, A. and Hernandez, A. M.C.},
abstractNote = {A search for pair production of dark matter candidates and supersymmetry (SUSY) production with two jets in vector-boson fusion (VBF) topology is presented using data collected by the Compact Muon Solenoid (CMS) detector in proton-proton collisions at the Large Hadron Collider (LHC). Final states with no leptons are expected in pair production of dark matter particles or scalar quarks in SUSY compressed mass-spectra scenarios. Final states with low-energy leptons are expected in the production of charginos and neutralinos in SUSY compressed mass-spectra scenarios. Results for both zero and two lepton final states at 8 TeV are presented with brief prospects at 13 TeV.},
doi = {10.1088/1742-6596/869/1/012047},
journal = {Journal of Physics. Conference Series},
number = 1,
volume = 869,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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  • A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions atmore » $$\sqrt{s}$$=8 TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case of a compressed mass spectrum. The data sample corresponds to an integrated luminosity of 18.5 fb $-$1, recorded by the CMS experiment. The observed dijet mass spectrum is consistent with the standard model expectation. In an effective field theory, dark matter masses are explored as a function of contact interaction strength. Lastly, the most stringent limit on bottom squark production with mass below 315 GeV is also reported, assuming a 5 GeV mass difference with respect to the lightest neutralino.« less
  • Our first search for supersymmetry in the vector-boson fusion topology is presented.The search targets final states with at least two leptons, large missing transverse momentum, and two jets with a large separation in rapidity. The data sample corresponds to an integrated luminosity of 19.7 fb -1 of proton-proton collisions at √s = 8 TeV collected with the CMS detector at the CERN LHC. The observed dijet invariant mass spectrum is found to be consistent with the expected standard model prediction. Upper limits are set on the cross sections for chargino and neutralino production with two associated jets, assuming the supersymmetricmore » partner of the τ lepton to be the lightest slepton and the lightest slepton to be lighter than the charginos. For a compressed-mass-spectrum scenario in which the mass difference between the lightest supersymmetric particle X ~0 1 and the next lightest, mass-degenerate, gaugino particles X ~0 2 and X 1 is 50 GeV, a mass lower limit of 170 GeV is set for these latter two particles.« less
  • A search is presented for an excess of events with large missing transverse momentum in association with at least one highly energetic jet, in a data sample of proton-proton collisions at a centre-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of 19.7 inverse femtobarns collected by the CMS experiment at the LHC. The results are interpreted using a set of simplified models for the production of dark matter via a scalar, pseudoscalar, vector, or axial vector mediator. Additional sensitivity is achieved by tagging events consistent with the jets originating from a hadronically decaying vector boson. Thismore » search uses jet substructure techniques to identify hadronically decaying vector bosons in both Lorentz-boosted and resolved scenarios. This analysis yields improvements of 80% in terms of excluded signal cross sections with respect to the previous CMS analysis using the same data set. No significant excess with respect to the standard model expectation is observed and limits are placed on the parameter space of the simplified models. As a result, mediator masses between 80 and 400 GeV in the scalar and pseudoscalar models, and up to 1.5 TeV in the vector and axial vector models, are excluded.« less
  • A search is presented for dark matter produced in association with a hadronically decaying W or Z boson using 3.2 fb -1 of pp collisions at √ s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with a hadronic jet compatible with a W or Z boson and with large missing transverse momentum are analysed. The data are consistent with the Standard Model predictions and are interpreted in terms of both an effective field theory and a simplified model containing dark matter.