Abstract
In this chapter, the estimation of the Standard Model background contributions in the signal region will be presented.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
- 1.
- 2.
- 3.
- 4.
- 5.
- 6.
- 7.
The transverse mass \(m_{\text {T}}\) of a W boson decaying into a charged lepton \(\ell \) and a neutrino \(\nu \) is calculated as \(m_{\text {T}}=\sqrt{2p_{\text {T}}^{\ell }p_{\text {T}}^{\nu } (1-\cos \Delta \phi (\ell ,\nu ))}\), using the two transverse momenta of the decay products as well as the angle between them.
- 8.
In previous versions of the mono-jet analysis, a conservative uncertainty of 20 % was assumed, but there the veto on a third jet reduced the top contamination to 1–2 %.
- 9.
With the performance groups’ reconstruction and identification scale factors applied to match the data efficiency.
References
The ATLAS Collaboration. ATLAS experiment—public results. https://twiki.cern.ch/twiki/bin/view/AtlasPublic/JetEtmissApproved2013JESUncertainty. Accessed Sept 2014
The ATLAS Collaboration (2013) Jet energy resolution in proton-proton collisions at \(\sqrt{s}=7\, {\rm TeV}\) TeV recorded in 2010 with the ATLAS detector. Eur Phys J C73:2306. doi:10.1140/epjc/s10052-013-2306-0. arXiv:1210.6210 [hep-ex]
The ATLAS Collaboration (2014) Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data. ArXiv Pre-Prints. arXiv:1407.5063 [hep-ex]
The ATLAS Collaboration (2014) Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data. ArXiv Pre-Prints. arXiv:1407.3935 [hep-ex]
The ATLAS Collaboration (2014) Electron efficiency measurements with the ATLAS detector using the 2012 LHC proton-proton collision data. Technical report ATLAS-CONF-2014-032. Geneva: CERN
The ATLAS Collaboration (2013) Performance of Missing Transverse Momentum Reconstruction in ATLAS studied in Proton-Proton Collisions recorded in 2012 at 8 TeV. Technical report ATLAS-CONF-2013-082. Geneva: CERN
Abdallah J et al (2013) Search for new phenomena with mono-jet plus missing transverse energy signature in proton-proton collisions at \(\sqrt{s}= 8\, {\rm TeV}\) with the ATLAS detector. Technical report ATL-COM-PHYS-2013-1578. Geneva: CERN
The ATLAS Collaboration (2015) Search for new phenomena in nal states with an energetic jet and large missing transverse momentum in pp collisions at \(\sqrt{s}= 8 \,{\rm TeV}\) with the ATLAS detector. In: submitted to EPJC. arXiv:1502.01518 [hep-ex]
The ATLAS Collaboration (2014) Calibration of the performance of b-tagging for c and light- avour jets in the 2012 ATLAS data. Technical report ATLAS-CONF-2014-046. Geneva: CERN
The ATLAS Collaboration (2014) Calibration of b-tagging using dileptonic top pair events in a combinatorial likelihood approach with the ATLAS experiment. Technical report ATLAS-CONF-2014-004. Geneva: CERN
The ATLAS Collaboration (2012) Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS experiment in sqrt(s) = 8 TeV proton-proton collisions: supporting documentation. Technical report ATL-PHYS-INT-2012-063. Geneva: CERN
Mangano M et al (2003) ALPGEN, a generator for hard multiparton processes in hadronic collisions. JHEP 07:001. arXiv:hep-ph/0206293
Kuhn JH et al (2008) Electroweak corrections to hadronic production of W bosons at large transverse momenta. Nucl Phys B797:27–77. doi:10.1016/j.nuclphysb.2007.12.029. arXiv:0708.0476 [hep-ph]
Beringer J et al (2012) Review of particle physics. Phys Rev D 86:010001. doi:10.1103/PhysRevD.86.010001
The ATLAS Collaboration (2013) Characterisation and mitigation of beam-induced backgrounds observed in the ATLAS detector during the 2011 proton-proton run. JINST 8:07004. doi:10.1088/1748-0221/8/07/P07004. arXiv:1303.0223 [hep-ex]
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2016 Springer International Publishing Switzerland
About this chapter
Cite this chapter
Pöttgen, R. (2016). Background Estimation. In: Search for Dark Matter with ATLAS. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-41045-6_14
Download citation
DOI: https://doi.org/10.1007/978-3-319-41045-6_14
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-41044-9
Online ISBN: 978-3-319-41045-6
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)