Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure
Abstract
We performed a search for a vector-like heavy T quark that is produced in pairs and that decays to a top quark and a Higgs boson. The data analysed correspond to an integrated luminosity of 19.7 fb-1collected with the CMS detector in proton-proton collisions at √s=8 TeV. For T quarks with large mass values the top quarks and Higgs bosons can have significant Lorentz boosts, so that their individual decay products often overlap and merge. Methods are applied to resolve the substructure of such merged jets. We also derived upper limits on the production cross section of a T quark with mass between 500 and 1000 GeV/c 2. If the T quark decays exclusively to tH, the observed (expected) lower limit on the mass of the T quark is 745 (773) GeV/c 2 at 95% confidence level. For the first time an algorithm is used for tagging boosted Higgs bosons that is based on a combination of jet substructure information and b tagging.
- Authors:
-
- Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CMS Collaboration
- OSTI Identifier:
- 1221275
- Report Number(s):
- FERMILAB-PUB-15-116-CMS; CERN-PH-EP-2015-034; CMS-B2G-14-002
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1503.01952
- 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: 2015; Journal Issue: 6; 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; beyond standard model; top physics
Citation Formats
Khachatryan, Vardan. Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure. United States: N. p., 2015.
Web. doi:10.1007/JHEP06(2015)080.
Khachatryan, Vardan. Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure. United States. https://doi.org/10.1007/JHEP06(2015)080
Khachatryan, Vardan. Fri .
"Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure". United States. https://doi.org/10.1007/JHEP06(2015)080. https://www.osti.gov/servlets/purl/1221275.
@article{osti_1221275,
title = {Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure},
author = {Khachatryan, Vardan},
abstractNote = {We performed a search for a vector-like heavy T quark that is produced in pairs and that decays to a top quark and a Higgs boson. The data analysed correspond to an integrated luminosity of 19.7 fb-1collected with the CMS detector in proton-proton collisions at √s=8 TeV. For T quarks with large mass values the top quarks and Higgs bosons can have significant Lorentz boosts, so that their individual decay products often overlap and merge. Methods are applied to resolve the substructure of such merged jets. We also derived upper limits on the production cross section of a T quark with mass between 500 and 1000 GeV/c 2. If the T quark decays exclusively to tH, the observed (expected) lower limit on the mass of the T quark is 745 (773) GeV/c 2 at 95% confidence level. For the first time an algorithm is used for tagging boosted Higgs bosons that is based on a combination of jet substructure information and b tagging.},
doi = {10.1007/JHEP06(2015)080},
journal = {Journal of High Energy Physics (Online)},
number = 6,
volume = 2015,
place = {United States},
year = {Fri Jun 12 00:00:00 EDT 2015},
month = {Fri Jun 12 00:00:00 EDT 2015}
}
Web of Science
Works referenced in this record:
Electroweak symmetry breaking from dimensional deconstruction
journal, July 2001
- Arkani-Hamed, Nima; Cohen, Andrew G.; Georgi, Howard
- Physics Letters B, Vol. 513, Issue 1-2
Little Higgs Theories
journal, December 2005
- Schmaltz, Martin; Tucker-Smith, David
- Annual Review of Nuclear and Particle Science, Vol. 55, Issue 1
Finite Higgs mass without supersymmetry
journal, January 2001
- Antoniadis, I.; Benakli, K.; Quirós, M.
- New Journal of Physics, Vol. 3
Dynamical gauge-Higgs unification in the electroweak theory
journal, February 2005
- Hosotani, Yutaka; Noda, Shusaku; Takenaga, Kazunori
- Physics Letters B, Vol. 607, Issue 3-4
The minimal composite Higgs model
journal, July 2005
- Agashe, Kaustubh; Contino, Roberto; Pomarol, Alex
- Nuclear Physics B, Vol. 719, Issue 1-2
Search for a Vectorlike Quark with Charge in Events from Collisions at
journal, December 2011
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- Physical Review Letters, Vol. 107, Issue 27
Jet Substructure as a New Higgs-Search Channel at the Large Hadron Collider
journal, June 2008
- Butterworth, Jonathan M.; Davison, Adam R.; Rubin, Mathieu
- Physical Review Letters, Vol. 100, Issue 24
Top Tagging: A Method for Identifying Boosted Hadronically Decaying Top Quarks
journal, October 2008
- Kaplan, David E.; Rehermann, Keith; Schwartz, Matthew D.
- Physical Review Letters, Vol. 101, Issue 14
Top tagging
journal, May 2012
- Plehn, Tilman; Spannowsky, Michael
- Journal of Physics G: Nuclear and Particle Physics, Vol. 39, Issue 8
Searches for new physics using the invariant mass distribution in collisions at
journal, November 2013
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- Physical Review Letters, Vol. 111, Issue 21
Description and performance of track and primary-vertex reconstruction with the CMS tracker
journal, October 2014
- Collaboration, The CMS
- Journal of Instrumentation, Vol. 9, Issue 10
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
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
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
Top++: A program for the calculation of the top-pair cross-section at hadron colliders
journal, November 2014
- Czakon, Michał; Mitov, Alexander
- Computer Physics Communications, Vol. 185, Issue 11
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
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
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
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
Deterministic annealing for clustering, compression, classification, regression, and related optimization problems
journal, January 1998
- Rose, K.
- Proceedings of the IEEE, Vol. 86, Issue 11
Adaptive vertex fitting
journal, November 2007
- Waltenberger, Wolfgang; Frühwirth, Rudolf; Vanlaer, Pascal
- Journal of Physics G: Nuclear and Particle Physics, Vol. 34, Issue 12
Better jet clustering algorithms
journal, August 1997
- Dokshitzer, Yu. L.; Leder, G. D.; Moretti, S.
- Journal of High Energy Physics, Vol. 1997, Issue 08
Determination of jet energy calibration and transverse momentum resolution in CMS
journal, November 2011
- collaboration, The CMS
- Journal of Instrumentation, Vol. 6, Issue 11
The catchment area of jets
journal, April 2008
- Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
- Journal of High Energy Physics, Vol. 2008, Issue 04
Identification of b-quark jets with the CMS experiment
journal, April 2013
- collaboration, The CMS
- Journal of Instrumentation, Vol. 8, Issue 04
Jet trimming
journal, February 2010
- Krohn, David; Thaler, Jesse; Wang, Lian-Tao
- Journal of High Energy Physics, Vol. 2010, Issue 2
Works referencing / citing this record:
Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC
journal, September 2019
- Matchev, Konstantin T.; Moortgat, Filip; Pape, Luc
- Journal of Physics G: Nuclear and Particle Physics, Vol. 46, Issue 11
Measurement of the jet mass in highly boosted $${\mathrm{t}}\overline{\mathrm{t}}$$ t t ¯ events from pp collisions at $$\sqrt{s}=8$$ s = 8 $$\,\text {TeV}$$ TeV
journal, July 2017
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- The European Physical Journal C, Vol. 77, Issue 7
Search for single production of vector-like quarks decaying to a top quark and a $$\mathrm {W} $$ W boson in proton–proton collisions at $$\sqrt{s} = 13 \,\text {TeV} $$ s = 13 TeV
journal, January 2019
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- The European Physical Journal C, Vol. 79, Issue 2