# ${{\boldsymbol t}}{{\overline{\boldsymbol t}}}{{\boldsymbol H}^{0}}$ Production INSPIRE search

Signal strengh relative to the Standard Model cross section.
VALUE CL% DOCUMENT ID TECN  COMMENT
$\bf{ 1.28 \pm0.20}$ OUR AVERAGE
$1.2$ $\pm0.3$ 1
 2018 AC
ATLS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$
$1.26$ ${}^{+0.31}_{-0.26}$ 2
 2018 L
CMS ${{\mathit p}}{{\mathit p}}$ , 7, 8, 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$
$1.9$ ${}^{+0.8}_{-0.7}$ 3
 2016 AN
ATLS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV
• • • We do not use the following data for averages, fits, limits, etc. • • •
$0.72$ $\pm0.24$ $\pm0.38$ 4
 2019 R
CMS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$
$1.6$ ${}^{+0.5}_{-0.4}$ 5
 2018 AC
ATLS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$
6
 2018 BK
ATLS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$
$0.84$ ${}^{+0.64}_{-0.61}$ 7
 2018 T
ATLS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$
$0.9$ $\pm1.5$ 8
 2018 BD
CMS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$
$1.23$ ${}^{+0.45}_{-0.43}$ 9
 2018 BQ
CMS ${{\mathit p}}{{\mathit p}}$ , 13 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$
$1.7$ $\pm0.8$ 10
 2016 AL
ATLS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , and ${{\mathit Z}}{{\mathit Z}^{*}}$
$2.3$ ${}^{+0.7}_{-0.6}$ 11, 3
 2016 AN
LHC ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV
$2.9$ ${}^{+1.0}_{-0.9}$ 3
 2016 AN
CMS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV
$1.81$ ${}^{+0.52}_{-0.50}$ ${}^{+0.58}_{-0.55}$ ${}^{+0.31}_{-0.12}$ 12
 2016 K
ATLS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV
$1.4$ ${}^{+2.1}_{-1.4}$ ${}^{+0.6}_{-0.3}$ 13
 2015
ATLS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV
$1.5$ $\pm1.1$ 14
 2015 BC
ATLS ${{\mathit p}}{{\mathit p}}$ , 8 TeV
$2.1$ ${}^{+1.4}_{-1.2}$ 15
 2015 T
ATLS ${{\mathit p}}{{\mathit p}}$ , 8 TeV
$1.2$ ${}^{+1.6}_{-1.5}$ 16
 2015 AN
CMS ${{\mathit p}}{{\mathit p}}$ , 8 TeV
$2.8$ ${}^{+1.0}_{-0.9}$ 17
 2014 H
CMS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV
$9.49$ ${}^{+6.60}_{-6.28}$ 18
 2013 L
CDF ${{\mathit p}}{{\overline{\mathit p}}}$ , 1.96 TeV
$<5.8$ 95 19
 2013 X
CMS ${{\mathit p}}{{\mathit p}}$ , 7, 8 TeV, ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$
1  AABOUD 2018AC combine results of ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ , ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ ( $\rightarrow$ ${{\mathit \ell}}{{\mathit \nu}}{{\mathit \ell}}{{\mathit \nu}}$ , ${{\mathit \ell}}{{\mathit \nu}}{{\mathit q}}{{\overline{\mathit q}}}$ ), ${{\mathit Z}}{{\mathit Z}^{*}}$ ( $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}{{\mathit \nu}}{{\mathit \nu}}$ , ${{\mathit \ell}}{{\mathit \ell}}{{\mathit q}}{{\overline{\mathit q}}}$ ) with results of ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ , ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ (AABOUD 2018T), ${{\mathit \gamma}}{{\mathit \gamma}}$ (AABOUD 2018BO), ${{\mathit Z}}{{\mathit Z}^{*}}$ ( $\rightarrow$ 4 ${{\mathit \ell}}$ ) (AABOUD 2018AJ) in 36.1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV. See their Table 14.
2  SIRUNYAN 2018L use up to 5.1, 19.7 and 35.9 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7, 8, and 13 TeV, respectively. The quoted signal strength corresponds to a significance of 5.2 standard deviations and is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125.09 GeV. ${{\mathit H}^{0}}$ decay channels of ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ , and ${{\mathit b}}{{\overline{\mathit b}}}$ are used. See their Table 1 and Fig. 2 for results on individual channels.
3  AAD 2016AN: In the fit, relative branching ratios are fixed to those in the Standard Model. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125.09 GeV.
4  SIRUNYAN 2019R search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit b}}{{\overline{\mathit b}}}$ in 35.9 fb${}^{-1}$ of data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
5  AABOUD 2018AC search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ ( $\rightarrow$ ${{\mathit \ell}}{{\mathit \nu}}{{\mathit \ell}}{{\mathit \nu}}$ , ${{\mathit \ell}}{{\mathit \nu}}{{\mathit q}}{{\overline{\mathit q}}}$ ), ${{\mathit Z}}{{\mathit Z}^{*}}$ ( $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}{{\mathit \nu}}{{\mathit \nu}}$ , ${{\mathit \ell}}{{\mathit \ell}}{{\mathit q}}{{\overline{\mathit q}}}$ ) in 36.1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV. See their Table 13 and Fig. 13.
6  AABOUD 2018BK use 79.8 fb${}^{-1}$ data for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ and ${{\mathit Z}}$ ${{\mathit Z}^{*}}$ $\rightarrow$ 4 ${{\mathit \ell}}$ (${{\mathit \ell}}$ = ${{\mathit e}}$, ${{\mathit \mu}}$) and 36.1 fb${}^{-1}$ for other decay channels at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. A significance of 5.8 standard deviations is observed for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125.09 GeV and its signal strength without the uncertainty of the ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ cross section is $1.32$ ${}^{+0.28}_{-0.26}$. Combining with results of 7 and 8 TeV (AAD 2016K), the significance is 6.3 standard deviations. Assuming Standard Model branching fractions, the total ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production cross section at 13 TeV is measured to be $670$ $\pm90$ ${}^{+110}_{-100}$ fb.
7  AABOUD 2018T search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit b}}{{\overline{\mathit b}}}$ in 36.1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
8  SIRUNYAN 2018BD search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ , ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ in the all-jet final state with 35.9 fb${}^{-1}$ ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
9  SIRUNYAN 2018BQ search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ in final states with electrons, muons and hadronically decaying ${{\mathit \tau}}$ leptons ( ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ ) with 35.9 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted signal strength corresponds to a significance of 3.2 standard deviations and is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
10  AAD 2016AL search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit \gamma}}{{\mathit \gamma}}$ in 4.5 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV and ${{\mathit b}}{{\overline{\mathit b}}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , and ${{\mathit Z}}{{\mathit Z}^{*}}$ in 20.3 fb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV. This paper combines the results of previous papers, and the new result of this paper only is: ${{\mathit \mu}}$ = $1.6$ $\pm2.6$.
11  AAD 2016AN perform fits to the ATLAS and CMS data at $\mathit E_{{\mathrm {cm}}}$ = 7 and 8 TeV.
12  AAD 2016K use up to 4.7 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV and up to 20.3 fb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The third uncertainty in the measurement is theory systematics. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125.36 GeV.
13  AAD 2015 search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit \gamma}}{{\mathit \gamma}}$ in 4.5 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV and 20.3 fb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The quoted result on the signal strength is equivalent to an upper limit of 6.7 at 95$\%$ CL and is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125.4 GeV.
14  AAD 2015BC search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit b}}{{\overline{\mathit b}}}$ in 20.3 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The corresponding upper limit is 3.4 at 95$\%$ CL. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
15  AAD 2015T search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ resulting in multilepton final states (mainly from ${{\mathit W}}{{\mathit W}^{*}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit Z}}{{\mathit Z}^{*}}$ ) in 20.3 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The quoted result on the signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV and corresponds to an upper limit of 4.7 at 95$\%$ CL. The data sample is independent from AAD 2015 and AAD 2015BC.
16  KHACHATRYAN 2015AN search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit b}}{{\overline{\mathit b}}}$ in 19.5 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The quoted result on the signal strength is equivalent to an upper limit of 4.2 at 95$\%$ CL and is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
17  KHACHATRYAN 2014H search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production with ${{\mathit H}^{0}}$ decaying to ${{\mathit b}}{{\overline{\mathit b}}}$ , ${{\mathit \tau}}{{\mathit \tau}}$ , ${{\mathit \gamma}}{{\mathit \gamma}}$ , ${{\mathit W}}{{\mathit W}^{*}}$ , and ${{\mathit Z}}{{\mathit Z}^{*}}$ , in 5.1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV and 19.7 fb${}^{-1}$ at $\mathit E_{{\mathrm {cm}}}$ = 8 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125.6 GeV.
18  AALTONEN 2013L combine all CDF results with $9.45 - 10.0$ fb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV.
19  CHATRCHYAN 2013X search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}^{0}}$ production followed by ${{\mathit H}^{0}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ , one top decaying to ${{\mathit \ell}}{{\mathit \nu}}$ and the other to either ${{\mathit \ell}}{{\mathit \nu}}$ or ${{\mathit q}}{{\overline{\mathit q}}}$ in 5.0 fb${}^{-1}$ and 5.1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 and 8 TeV. A limit on cross section times branching ratio which corresponds to ($4.0 - 8.6$) times the expected Standard Model cross section is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = $110 - 140$ GeV at 95$\%$ CL. The quoted limit is given for ${\mathit m}_{{{\mathit H}^{0}}}$ = 125 GeV, where 5.2 is expected for no signal.
References:
 SIRUNYAN 2019R
JHEP 1903 026 Search for $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ production in the $\mathrm{H}\to \mathrm{b}\overline{\mathrm{b}}$ decay channel with leptonic $\mathrm{t}\overline{\mathrm{t}}$ decays in proton-proton collisions at $\sqrt{s}=13$ TeV
 AABOUD 2018AC
PR D97 072003 Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector
 AABOUD 2018BK
PL B784 173 Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
 AABOUD 2018T
PR D97 072016 Search for the standard model Higgs boson produced in association with top quarks and decaying into a $b\bar{b}$ pair in $pp$ collisions at $\sqrt{s}$ = 13??TeV with the ATLAS detector
 SIRUNYAN 2018L
PRL 120 231801 Observation of $\mathrm{t\overline{t}}$H production
 SIRUNYAN 2018BQ
JHEP 1808 066 Evidence for associated production of a Higgs boson with a top quark pair in final states with electrons, muons, and hadronically decaying $\tau$ leptons at $\sqrt{s} =$ 13 TeV
 SIRUNYAN 2018BD
JHEP 1806 101 Search for $\mathrm{t}\overline{\mathrm{t}}$H production in the all-jet final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV
JHEP 1608 045 Measurements of the Higgs Boson Production and Decay Rates and Constraints on its Couplings from a Combined ATLAS and CMS Analysis of the LHC ${{\mathit p}}{{\mathit p}}$ Collision Data at $\sqrt {s }$ =7 and 8 TeV
EPJ C76 6 Measurements of the Higgs Boson Production and Decay Rates and Coupling Strengths using ${{\mathit p}}{{\mathit p}}$ Collision Data at $\sqrt {s }$ = 7 and 8 TeV in the ATLAS Experiment
JHEP 1605 160 Search for the Standard Model Higgs Boson Decaying into ${\mathit {\mathit b}}{\mathit {\overline{\mathit b}}}$ Produced in Association with Top Quarks Decaying Hadronically in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV with the ATLAS Detector
EPJ C75 349 Search for the Standard Model Higgs Boson Produced in Association with Top Quarks and Decaying into ${\mathit {\mathit b}}{\mathit {\overline{\mathit b}}}$ in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV with the ATLAS Detector
PL B740 222 Search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ Produced in Association with Top Quarks and Constraints on the Yukawa Coupling between the Top Quark and the Higgs Boson using Data Taken at 7 TeV and 8 TeV with the ATLAS Detector
JHEP 1305 145 Search for the Standard Model Higgs Boson Produced in Association with a Top-Quark Pair in ${{\mathit p}}{{\mathit p}}$ Collisions at the LHC