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Title: Same-sign dilepton excesses and vector-like quarks

Abstract

Multiple analyses from ATLAS and CMS collaborations, including searches for ttH production, supersymmetric particles and vector-like quarks, observed excesses in the same-sign dilepton channel containing b-jets and missing transverse energy in the LHC Run 1 data. In the context of little Higgs theories with T parity, we explain these excesses using vector-like T-odd quarks decaying into a top quark, a W boson and the lightest T-odd particle (LTP). For heavy vector-like quarks, decay topologies containing the LTP have not been searched for at the LHC. The bounds on the masses of the T-odd quarks can be estimated in a simplified model approach by adapting the search limits for top/bottom squarks in supersymmetry. Assuming a realistic decay branching fraction, a benchmark with a 750 GeV T-odd b' quark is proposed. In conclusion, we also comment on the possibility to fit excesses in different analyses in a common framework.

Authors:
 [1];  [2];  [3]
+ Show Author Affiliations
  1. National Taiwan Normal Univ., Taipei (Taiwan). Dept. of Physics
  2. Univ. of California, Davis, CA (United States). Dept. of Physics
  3. Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy; Argonne National Lab. (ANL), Argonne, IL (United States). High Energy Physics Division
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP)
OSTI Identifier:
1336261
Grant/Contract Number:  
AC02-06CH11357; SC0010143; SC-000999; 02-2112-M-003-001-MY3
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: 2016; Journal Issue: 3; 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

Chen, Chuan-Ren, Cheng, Hsin-Chia, and Low, Ian. Same-sign dilepton excesses and vector-like quarks. United States: N. p., 2016. Web. doi:10.1007/JHEP03(2016)098.
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Chen, Chuan-Ren, Cheng, Hsin-Chia, & Low, Ian. Same-sign dilepton excesses and vector-like quarks. United States. https://doi.org/10.1007/JHEP03(2016)098
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Chen, Chuan-Ren, Cheng, Hsin-Chia, and Low, Ian. Tue . "Same-sign dilepton excesses and vector-like quarks". United States. https://doi.org/10.1007/JHEP03(2016)098. https://www.osti.gov/servlets/purl/1336261.
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@article{osti_1336261,
title = {Same-sign dilepton excesses and vector-like quarks},
author = {Chen, Chuan-Ren and Cheng, Hsin-Chia and Low, Ian},
abstractNote = {Multiple analyses from ATLAS and CMS collaborations, including searches for ttH production, supersymmetric particles and vector-like quarks, observed excesses in the same-sign dilepton channel containing b-jets and missing transverse energy in the LHC Run 1 data. In the context of little Higgs theories with T parity, we explain these excesses using vector-like T-odd quarks decaying into a top quark, a W boson and the lightest T-odd particle (LTP). For heavy vector-like quarks, decay topologies containing the LTP have not been searched for at the LHC. The bounds on the masses of the T-odd quarks can be estimated in a simplified model approach by adapting the search limits for top/bottom squarks in supersymmetry. Assuming a realistic decay branching fraction, a benchmark with a 750 GeV T-odd b' quark is proposed. In conclusion, we also comment on the possibility to fit excesses in different analyses in a common framework.},
doi = {10.1007/JHEP03(2016)098},
journal = {Journal of High Energy Physics (Online)},
number = 3,
volume = 2016,
place = {United States},
year = {Tue Mar 15 00:00:00 EDT 2016},
month = {Tue Mar 15 00:00:00 EDT 2016}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1007/JHEP03(2016)098
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Works referenced in this record:

A Review of spin Determination at the lhc
journal, November 2008

TeV symmetry and the little hierarchy problem
journal, September 2003

A Supersymmetry Primer
book, April 2010

What is the limit on the Higgs mass?
journal, September 1999

Model-independent precision constraints on dimension-6 operators
journal, February 2015

Large Mass Hierarchy from a Small Extra Dimension
journal, October 1999

KK parity in warped extra dimension
journal, April 2008

Electroweak symmetry breaking from dimensional deconstruction
journal, July 2001

The Minimal Moose for a Little Higgs
journal, August 2002

The Littlest Higgs
journal, July 2002

Little Hierarchy, Little Higgses, and a Little Symmetry
journal, August 2004

T Parity and the Littlest Higgs
journal, October 2004

Simplified models for LHC new physics searches
journal, September 2012

  • Alves, Daniele; Arkani-Hamed, Nima; Arora, Sanjay
  • Journal of Physics G: Nuclear and Particle Physics, Vol. 39, Issue 10
  • DOI: 10.1088/0954-3899/39/10/105005

Spin measurements in cascade decays at the LHC
journal, April 2007

Electroweak precision constraints on the littlest Higgs model with T parity
journal, January 2006

LHC signals of T -odd heavy quarks in the Littlest Higgs model
journal, August 2007

Dileptonic signatures of T-odd quarks at the LHC
journal, March 2010

  • Cacciapaglia, Giacomo; Rai Choudhury, S.; Deandrea, Aldo
  • Journal of High Energy Physics, Vol. 2010, Issue 3
  • DOI: 10.1007/JHEP03(2010)059

T-odd quarks at the large hadron collider: 2010–2012
journal, October 2011

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
journal, October 2015

Squark and gluino production cross sections in $$pp$$ p p collisions at $$\sqrt{s} = 13, 14, 33$$ s = 13 , 14 , 33 and $$100$$ 100 TeV
journal, December 2014

Heavy-quark pair production at two loops in QCD
journal, October 2008

MadGraph/MadEvent v4: the new web generation
journal, September 2007

PYTHIA 6.4 physics and manual
journal, May 2006

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    Works referencing / citing this record:

    Exotic signals of vectorlike quarks
    journal, June 2018

    • Dobrescu, Bogdan A.; Yu, Felix
    • Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 8
    • DOI: 10.1088/1361-6471/aacbfd

    Exotic Signals of Vectorlike Quarks
    text, January 2016

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