# Limits on Kaluza-Klein Gluons in Warped Extra Dimensions INSPIRE search

This section places limits on the mass of the first Kaluza-Klein (KK) excitation of the gluon in warped extra dimension models with Standard Model fields propagating in the bulk. Bounds are given for a specific benchmark model with $\Gamma /\mathit m$ = 15.3$\%$ where $\Gamma$ is the width and $\mathit m$ the mass of the KK gluon. See theExtra Dimensions'' review for more discussion.
VALUE (TeV) CL% DOCUMENT ID TECN  COMMENT
$\bf{> 3.8}$ 95 1
 2018 BI
ATLS ${{\mathit g}_{{KK}}}$ $\rightarrow$ ${{\mathit t}}{{\overline{\mathit t}}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit j}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
2
 2019 AS
ATLS ${{\mathit g}_{{KK}}}$ $\rightarrow$ ${{\mathit t}}{{\overline{\mathit t}}}$ $\rightarrow$ ${{\mathit j}}{{\mathit j}}$
3
 2019 AL
CMS ${{\mathit g}_{{KK}}}$ $\rightarrow$ ${{\mathit t}}{{\mathit T}}$
$> 2.5$ 95 4
 2013 BM
CMS ${{\mathit g}_{{KK}}}$ $\rightarrow$ ${{\mathit t}}{{\overline{\mathit t}}}$
5
 2013 A
${{\overline{\mathit B}}}$ $\rightarrow$ ${{\mathit X}_{{s}}}{{\mathit \gamma}}$
$> 1.5$ 95 6
 2012 BV
ATLS ${{\mathit g}_{{KK}}}$ $\rightarrow$ ${{\mathit t}}{{\overline{\mathit t}}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit j}}$
1  AABOUD 2018BI use 36.1 fb${}^{-1}$ of data from ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. This result updates AAD 2013AQ.
2  AABOUD 2019AS use 36.1 fb${}^{-1}$ of data from ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. An upper bound of 3.4 TeV is placed on the KK gluon mass for ${{\mathit \Gamma}}/{{\mathit m}}$ = 30$\%$.
3  SIRUNYAN 2019AL use 35.9 fb${}^{-1}$ of data from ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV to place limits on a KK gluon decaying to a top quark and a heavy vector-like fermion, T. KK gluon masses between 1.5 and 2.3 TeV and between 2.0 and 2.4 TeV are excluded for T masses of 1.2 and 1.5 TeV, respectively.
4  CHATRCHYAN 2013BM use 19.7 fb${}^{-1}$ of data from ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. Bound is for a width of approximately $15 - 20\%$ of the KK gluon mass.
5  CHEN 2013A place limits on the KK mass scale for a specific warped model with custodial symmetry and bulk fermions. See their Figures 4 and 5.
6  AAD 2012BV use 2.05 fb${}^{-1}$ of data from ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV.
References:
 AABOUD 2019AS
PR D99 092004 Search for heavy particles decaying into a top-quark pair in the fully hadronic final state in $pp$ collisions at $\sqrt{s} =$ 13 TeV with the ATLAS detector
 SIRUNYAN 2019AL
EPJ C79 208 Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton+jets final state in pp collisions at $\sqrt{s} =$ 13 TeV
 AABOUD 2018BI
EPJ C78 565 Search for heavy particles decaying into top-quark pairs using lepton-plus-jets events in proton?proton collisions at $\sqrt{s} = 13$   $\text {TeV}$ with the ATLAS detector
 CHATRCHYAN 2013BM
PRL 111 211804 Searches for New Physics using the ${\mathit {\mathit t}}{\mathit {\overline{\mathit t}}}$ Invariant Mass Distribution in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV
 CHEN 2013A
CP C37 063102 Constraint on the Warped Space from ${{\overline{\mathit B}}}$ $\rightarrow$ ${{\mathit X}_{{s}}}{{\mathit \gamma}}$
JHEP 1209 041 A Search for ${\mathit {\mathit t}}{\mathit {\overline{\mathit t}}}$ Resonances in Lepton+Jets Events with Highly Boosted Top Quarks Collected in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 7 TeV with the ATLAS Detector