Search for Standard Model Production of Four Top Quarks in the Lepton + Jets Channel in pp Collisions at $$\sqrt{s}$$ = 8 TeV
Abstract
Our search is presented for standard model (SM) production of four top quarks (t¯tt¯t) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb-1 recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. The expected cross section for SM t¯tt¯t production is σSMt¯tt¯t≈1fb. A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background. We determined that the data are consistent with expectations of the SM, and an upper limit of 32 fb is set at a 95% confidence level on the cross section for producing four top quarks in the SM, where a limit of 32 ± 17 fb is expected.
- Authors:
-
- Yerevan Physics Inst. (YerPhI) (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CMS Collaboration
- OSTI Identifier:
- 1234849
- Report Number(s):
- FERMILAB-PUB-14-366-CMS; CERN-PH-EP-2014-222; CMS-TOP-13-012
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1409.7339; TRN: US1500523
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2014; Journal Issue: 11; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; hadron-hadron scattering; top physics
Citation Formats
Khachatryan, Vardan. Search for Standard Model Production of Four Top Quarks in the Lepton + Jets Channel in pp Collisions at $\sqrt{s}$ = 8 TeV. United States: N. p., 2014.
Web. doi:10.1007/JHEP11(2014)154.
Khachatryan, Vardan. Search for Standard Model Production of Four Top Quarks in the Lepton + Jets Channel in pp Collisions at $\sqrt{s}$ = 8 TeV. United States. https://doi.org/10.1007/JHEP11(2014)154
Khachatryan, Vardan. Thu .
"Search for Standard Model Production of Four Top Quarks in the Lepton + Jets Channel in pp Collisions at $\sqrt{s}$ = 8 TeV". United States. https://doi.org/10.1007/JHEP11(2014)154. https://www.osti.gov/servlets/purl/1234849.
@article{osti_1234849,
title = {Search for Standard Model Production of Four Top Quarks in the Lepton + Jets Channel in pp Collisions at $\sqrt{s}$ = 8 TeV},
author = {Khachatryan, Vardan},
abstractNote = {Our search is presented for standard model (SM) production of four top quarks (t¯tt¯t) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb-1 recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. The expected cross section for SM t¯tt¯t production is σSMt¯tt¯t≈1fb. A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background. We determined that the data are consistent with expectations of the SM, and an upper limit of 32 fb is set at a 95% confidence level on the cross section for producing four top quarks in the SM, where a limit of 32 ± 17 fb is expected.},
doi = {10.1007/JHEP11(2014)154},
journal = {Journal of High Energy Physics (Online)},
number = 11,
volume = 2014,
place = {United States},
year = {Thu Nov 27 00:00:00 EST 2014},
month = {Thu Nov 27 00:00:00 EST 2014}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 26 works
Citation information provided by
Web of Science
Web of Science
Figures / Tables:
Figure 1: Leading-order Feynman diagrams for $t\bar{t}t\bar{t}$ production in the SM from gluon-gluon fusion (left) and quark-antiquark annihilation (right).
All figures and tables
(3 total)
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Gluino decays with heavier scalar superpartners
journal, February 2006
- Toharia, Manuel; Wells, James D.
- Journal of High Energy Physics, Vol. 2006, Issue 02
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
journal, July 2002
- Pumplin, Jonathan; Stump, Daniel Robert; Huston, Joey
- Journal of High Energy Physics, Vol. 2002, Issue 07
The anti- k t jet clustering algorithm
journal, April 2008
- Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
- Journal of High Energy Physics, Vol. 2008, Issue 04
Searching for sgluons in multitop events at a center-of-mass energy of 8 TeV
journal, April 2013
- Calvet, Samuel; Fuks, Benjamin; Gris, Philippe
- Journal of High Energy Physics, Vol. 2013, Issue 4
Determination of jet energy calibration and transverse momentum resolution in CMS
journal, November 2011
- collaboration, The CMS
- Journal of Instrumentation, Vol. 6, Issue 11
Triple-top signal of new physics at the LHC
journal, April 2010
- Barger, Vernon; Keung, Wai-Yee; Yencho, Brian
- Physics Letters B, Vol. 687, Issue 1
Universal interface of TAUOLA: Technical and physics documentation
journal, March 2012
- Davidson, N.; Nanava, G.; Przedziński, T.
- Computer Physics Communications, Vol. 183, Issue 3
A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
journal, November 2004
- Nason, Paolo
- Journal of High Energy Physics, Vol. 2004, Issue 11
A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
journal, June 2010
- Alioli, Simone; Nason, Paolo; Oleari, Carlo
- Journal of High Energy Physics, Vol. 2010, Issue 6
PYTHIA 6.4 physics and manual
journal, May 2006
- Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
- Journal of High Energy Physics, Vol. 2006, Issue 05
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014
- Alwall, J.; Frederix, R.; Frixione, S.
- Journal of High Energy Physics, Vol. 2014, Issue 7
Confidence level computation for combining searches with small statistics
journal, September 1999
- Junk, Thomas
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 434, Issue 2-3
FastJet user manual: (for version 3.0.2)
journal, March 2012
- Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
- The European Physical Journal C, Vol. 72, Issue 3
Beyond the Minimal Supersymmetric Standard Model: from Theory to Phenomenology
journal, March 2012
- Fuks, Benjamin
- International Journal of Modern Physics A, Vol. 27, Issue 07
Seeking sgluons
journal, April 2009
- Plehn, Tilman; Tait, Tim M. P.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 36, Issue 7
Geant4—a simulation toolkit
journal, July 2003
- Agostinelli, S.; Allison, J.; Amako, K.
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
Presentation of search results: the CL s technique
journal, September 2002
- Read, A. L.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 28, Issue 10
Constraining BSM physics at the LHC: four top final states with NLO accuracy in perturbative QCD
journal, July 2012
- Bevilacqua, G.; Worek, M.
- Journal of High Energy Physics, Vol. 2012, Issue 7
Performance of CMS muon reconstruction in pp collision events at √s = 7 TeV
journal, October 2012
- collaboration, The CMS
- Journal of Instrumentation, Vol. 7, Issue 10
Matching NLO QCD computations with parton shower simulations: the POWHEG method
journal, November 2007
- Frixione, Stefano; Nason, Paolo; Oleari, Carlo
- Journal of High Energy Physics, Vol. 2007, Issue 11
Matching matrix elements and shower evolution for top-pair production in hadronic collisions
journal, January 2007
- Mangano, Michelangelo L.; Moretti, Mauro; Piccinini, Fulvio
- Journal of High Energy Physics, Vol. 2007, Issue 01
Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through
journal, June 2013
- Czakon, Michał; Fiedler, Paul; Mitov, Alexander
- Physical Review Letters, Vol. 110, Issue 25
Asymptotic formulae for likelihood-based tests of new physics
journal, February 2011
- Cowan, Glen; Cranmer, Kyle; Gross, Eilam
- The European Physical Journal C, Vol. 71, Issue 2
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
text, January 2014
- Alwall, J.; Frederix, R.; Frixione, S.
- Springer
Performance of CMS muon reconstruction in pp collision events at √s = 7 TeV
text, January 2012
- Collaboration, Cms; Chatrchyan, Serguei; Bäni, Lukas
- ETH Zurich
Determination of jet energy calibration and transverse momentum resolution in CMS
text, January 2011
- Collaboration, Cms; Amsler, C.; Al, Et
- IOP Publishing
Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
text, January 2007
- Frixione, Stefano; Nason, Paolo; Oleari, Carlo
- arXiv
The anti-k_t jet clustering algorithm
text, January 2008
- Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
- arXiv
Constraining BSM Physics at the LHC: Four top final states with NLO accuracy in perturbative QCD
text, January 2012
- Bevilacqua, G.; Worek, M.
- arXiv
Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
text, January 2012
- Collaboration, Cms
- arXiv
Searching for sgluons in multitop events at a center-of-mass energy of 8 TeV
text, January 2012
- Calvet, Samuel; Fuks, Benjamin; Gris, Philippe
- arXiv
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
text, January 2002
- Pumplin, J.; Stump, D. R.; Huston, J.
- arXiv
A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
text, January 2004
- Nason, Paolo
- arXiv
Works referencing / citing this record:
Top-quark physics at the Large Hadron Collider
journal, May 2017
- Cristinziani, Markus; Mulders, Martijn
- Journal of Physics G: Nuclear and Particle Physics, Vol. 44, Issue 6
Natural Alignment in the Two Higgs Doublet Model
journal, July 2017
- Bhupal Dev, P. S.; Pilaftsis, Apostolos
- Journal of Physics: Conference Series, Vol. 873
Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at $$\sqrt{s} = 13\,\text {TeV} $$ s = 13 TeV
journal, February 2018
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- The European Physical Journal C, Vol. 78, Issue 2
Search for standard model production of four top quarks with same-sign and multilepton final states in proton–proton collisions at $\sqrt{s} = 13\,\text {TeV} $
text, January 2018
- Sirunyan, Albert M.; Tumasyan, Armen; Adam, Wolfgang
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Top-quark physics at the Large Hadron Collider
text, January 2016
- Cristinziani, Markus; Mulders, Martijn
- arXiv
Natural Alignment in the Two Higgs Doublet Model
text, January 2017
- Dev, P. S. Bhupal; Pilaftsis, Apostolos
- arXiv
Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.