Search for excited leptons in proton-proton collisions at √(s) = 8 TeV
Abstract
Our search for compositeness of electrons and muons is presented using a data sample of proton-proton collisions at a center-of-mass energy of √(s) = 8 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb-1. Excited leptons (ℓ*) produced via contact interactions in conjunction with a standard model lepton are considered, and a search is made for their gauge decay modes. The decays considered are ℓ* →ℓγ and ℓ* → ℓZ, which give final states of two leptons and a photon or, depending on the Z-boson decay mode, four leptons or two leptons and two jets. The number of events observed in data is consistent with the standard model prediction. Exclusion limits are set on the excited lepton mass, and the compositeness scale L. For the case Mℓ* = L the existence of excited electrons (muons) is excluded up to masses of 2.45 (2.47) TeV at 95% confidence level. The neutral current decays of excited leptons are considered for the first time, and limits are extended to include the possibility that the weight factors f and f ', which determine the couplings between standard model leptons and excited leptons via gauge mediatedmore »
- Authors:
-
- Yerevan Physics Inst. (YerPhI) (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:
- 1230027
- Report Number(s):
- FERMILAB-PUB-15-516-CMS
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1511.01407; TRN: US1601628
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Volume: 2016; Journal Issue: 125; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Khachatryan, Vardan. Search for excited leptons in proton-proton collisions at √(s) = 8 TeV. United States: N. p., 2016.
Web. doi:10.1007/JHEP03(2016)125.
Khachatryan, Vardan. Search for excited leptons in proton-proton collisions at √(s) = 8 TeV. United States. https://doi.org/10.1007/JHEP03(2016)125
Khachatryan, Vardan. 2016.
"Search for excited leptons in proton-proton collisions at √(s) = 8 TeV". United States. https://doi.org/10.1007/JHEP03(2016)125. https://www.osti.gov/servlets/purl/1230027.
@article{osti_1230027,
title = {Search for excited leptons in proton-proton collisions at √(s) = 8 TeV},
author = {Khachatryan, Vardan},
abstractNote = {Our search for compositeness of electrons and muons is presented using a data sample of proton-proton collisions at a center-of-mass energy of √(s) = 8 TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb-1. Excited leptons (ℓ*) produced via contact interactions in conjunction with a standard model lepton are considered, and a search is made for their gauge decay modes. The decays considered are ℓ* →ℓγ and ℓ* → ℓZ, which give final states of two leptons and a photon or, depending on the Z-boson decay mode, four leptons or two leptons and two jets. The number of events observed in data is consistent with the standard model prediction. Exclusion limits are set on the excited lepton mass, and the compositeness scale L. For the case Mℓ* = L the existence of excited electrons (muons) is excluded up to masses of 2.45 (2.47) TeV at 95% confidence level. The neutral current decays of excited leptons are considered for the first time, and limits are extended to include the possibility that the weight factors f and f ', which determine the couplings between standard model leptons and excited leptons via gauge mediated interactions, have opposite sign.},
doi = {10.1007/JHEP03(2016)125},
url = {https://www.osti.gov/biblio/1230027},
journal = {Journal of High Energy Physics (Online)},
issn = {1029-8479},
number = 125,
volume = 2016,
place = {United States},
year = {Thu Mar 17 00:00:00 EDT 2016},
month = {Thu Mar 17 00:00:00 EDT 2016}
}
Web of Science
Works referenced in this record:
Vector boson pair production at the LHC
journal, July 2011
- Campbell, John M.; Ellis, R. Keith; Williams, Ciaran
- Journal of High Energy Physics, Vol. 2011, Issue 7
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
Observable effects of the possible sub-structure of leptons and quarks
journal, May 1982
- Terazawa, Hidezumi; Yasuè, Masaki; Akama, Keiichi
- Physics Letters B, Vol. 112, Issue 4-5
Search for excited electrons and muons in $\sqrt {s}=8$ TeV proton–proton collisions with the ATLAS detector
journal, September 2013
- Aad, G.; Abajyan, T.; Abbott, B.
- New Journal of Physics, Vol. 15, Issue 9
A quantum structuredynamic model of quarks, leptons, weak vector bosons and Higgs mesons
journal, February 1981
- Greenberg, O. W.; Sucher, Joseph
- Physics Letters B, Vol. 99, Issue 4
Cuba—a library for multidimensional numerical integration
journal, June 2005
- Hahn, T.
- Computer Physics Communications, Vol. 168, Issue 2
Maximizing boosted top identification by minimizing N-subjettiness
journal, February 2012
- Thaler, Jesse; Van Tilburg, Ken
- Journal of High Energy Physics, Vol. 2012, Issue 2
Search for composite and exotic fermions at LEP 2
journal, March 1999
- Abreu et al., P.
- The European Physical Journal C, Vol. 8, Issue 1
Composite models for quarks and leptons
journal, February 1984
- Harari, Haim
- Physics Reports, Vol. 104, Issue 2-4
A brief introduction to PYTHIA 8.1
journal, June 2008
- Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
- Computer Physics Communications, Vol. 178, Issue 11
Search for excited leptons at 130–140 GeV
journal, September 1996
- Buskulic, D.; De Bonis, I.; Decamp, D.
- Physics Letters B, Vol. 385, Issue 1-4
Are quarks composite?
journal, November 1975
- Pati, J. C.; Salam, A.; Strathdee, J.
- Physics Letters B, Vol. 59, Issue 3
Search for Excited and Exotic Muons in the Decay Channel in Collisions at
journal, November 2006
- Abulencia, A.; Acosta, D.; Adelman, J.
- Physical Review Letters, Vol. 97, Issue 19
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
Search for excited leptons in pp collisions at <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>7</mml:mn><mml:mtext> TeV</mml:mtext></mml:math>
journal, March 2013
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- Physics Letters B, Vol. 720, Issue 4-5
Longitudinally-invariant k⊥-clustering algorithms for hadron-hadron collisions
journal, September 1993
- Catani, S.; Dokshitzer, Yu. L.; Seymour, M. H.
- Nuclear Physics B, Vol. 406, Issue 1-2
Search for excited electrons in collisions at
journal, May 2008
- Abazov, V. M.; Abbott, B.; Abolins, M.
- Physical Review D, Vol. 77, Issue 9
W+W−, WZ and ZZ production in the POWHEG BOX
journal, November 2011
- Melia, Tom; Nason, Paolo; Röntsch, Raoul
- Journal of High Energy Physics, Vol. 2011, Issue 11
PYTHIA 6.4 physics and manual
journal, May 2006
- Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
- Journal of High Energy Physics, Vol. 2006, Issue 05
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
Identifying boosted objects with N-subjettiness
journal, March 2011
- Thaler, Jesse; Van Tilburg, Ken
- Journal of High Energy Physics, Vol. 2011, Issue 3
Search for heavy resonances in the W/Z-tagged dijet mass spectrum in pp collisions at 7 TeV
journal, June 2013
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- Physics Letters B, Vol. 723, Issue 4-5
Event generation with SHERPA 1.1
journal, February 2009
- Gleisberg, T.; Höche, S.; Krauss, F.
- Journal of High Energy Physics, Vol. 2009, Issue 02
Jettiness: An Inclusive Event Shape to Veto Jets
journal, August 2010
- Stewart, Iain W.; Tackmann, Frank J.; Waalewijn, Wouter J.
- Physical Review Letters, Vol. 105, Issue 9
Search for excited electrons in ep collisions at HERA
journal, August 2008
- Aaron, F. D.; Alexa, C.; Andreev, V.
- Physics Letters B, Vol. 666, Issue 2
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
Search for excited muons in collisions at
journal, June 2006
- Abazov, V. M.; Abbott, B.; Abolins, M.
- Physical Review D, Vol. 73, Issue 11
Search for Excited and Exotic Electrons in the Decay Channel in Collisions at
journal, March 2005
- Acosta, D.; Adelman, J.; Affolder, T.
- Physical Review Letters, Vol. 94, Issue 10
Measurement of the production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at
journal, January 2015
- Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
- Physics Letters B, Vol. 740
Search for excited leptons at LEP
journal, August 2003
- Achard, P.; Adriani, O.; Aguilar-Benitez, M.
- Physics Letters B, Vol. 568, Issue 1-2
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
New Tests for Quark and Lepton Substructure
journal, March 1983
- Eichten, Estia J.; Lane, Kenneth D.; Peskin, Michael E.
- Physical Review Letters, Vol. 50, Issue 11
Search for unstable heavy and excited leptons at LEP2
journal, May 2000
- Abbiendi et al., G.
- The European Physical Journal C, Vol. 14, Issue 1
Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at √ s = 8 TeV
journal, June 2015
- ,
- Journal of Instrumentation, Vol. 10, Issue 06, p. P06005-P06005
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
Determination of jet energy calibration and transverse momentum resolution in CMS
journal, November 2011
- collaboration, The CMS
- Journal of Instrumentation, Vol. 6, Issue 11
Cuba—a library for multidimensional numerical integration
journal, June 2007
- Hahn, Thomas
- Computer Physics Communications, Vol. 176, Issue 11-12
A quantum structuredynamic model of quarks, leptons, weak vector bosons, and Higgs mesons
conference, January 1981
- Greenberg, O. W.; Sucher, Jospeh
- AIP Conference Proceedings Volume 68
Performance of Electron Reconstruction and Selection with the CMS Detector in Proton-Proton Collisions at √s = 8 TeV
text, January 2015
- Collaboration, Cms; Khachatryan, Vardan; Sirunyan, Albert M.
- RWTH Aachen University
Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at √s = 8 TeV
text, January 2015
- Collaboration, Cms; Khachatryan, Vardan; Sirunyan, Albert M.
- RWTH Aachen University
Event generation with SHERPA 1.1
text, January 2009
- Gleisberg, T.; Höche, S.; Krauss, F.
- Institute of Physics Publishing
Works referencing / citing this record:
Hunting for heavy composite Majorana neutrinos at the LHC
journal, October 2016
- Leonardi, R.; Alunni, L.; Romeo, F.
- The European Physical Journal C, Vol. 76, Issue 11