${{\mathit H}}$ SIGNAL STRENGTHS IN DIFFERENT CHANNELS

The ${{\mathit H}}$ signal strength in a particular final state ${{\mathit x}}{{\mathit x}}$ is given by the cross section times branching ratio in this channel normalized to the Standard Model (SM) value, $\sigma $ $\cdot{}$ B( ${{\mathit H}}$ $\rightarrow$ ${{\mathit x}}{{\mathit x}}$) $/$ ($\sigma $ $\cdot{}$ B( ${{\mathit H}}$ $\rightarrow$ ${{\mathit x}}{{\mathit x}}))_{{\mathrm {SM}}}$, for the specified mass value of ${{\mathit H}}$. For the SM predictions, see DITTMAIER 2011, DITTMAIER 2012, and HEINEMEYER 2013A. Results for fiducial and differential cross sections are also listed below.

${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ final state INSPIRE search

S126SMU
VALUE CL% DOCUMENT ID TECN  COMMENT
$\bf{ 1.31 \pm0.29}$ OUR AVERAGE
$1.4$ $\pm0.4$ 1
AAD
2025AR
 ATLS ${{\mathit p}}{{\mathit p}}$, 13, 13.6 TeV
$1.21$ ${}^{+0.45}_{-0.42}$ 2
CMS
2022
CMS ${{\mathit p}}{{\mathit p}}$, 13 TeV
• • • We do not use the following data for averages, fits, limits, etc. • • •
$1.6$ $\pm0.6$ 3
AAD
2025AR
 ATLS ${{\mathit p}}{{\mathit p}}$, 13.6 TeV
$1.2$ $\pm0.6$ 4
AAD
2021
ATLS ${{\mathit p}}{{\mathit p}}$, 13 TeV
$1.19$ ${}^{+0.40}_{-0.39}$ ${}^{+0.15}_{-0.14}$ 5
SIRUNYAN
2021C
 CMS ${{\mathit p}}{{\mathit p}}$, 13 TeV
$0.68$ ${}^{+1.25}_{-1.24}$ 6
SIRUNYAN
2019AT
 CMS ${{\mathit p}}{{\mathit p}}$, 13 TeV
$0.7$ $\pm1.0$ ${}^{+0.2}_{-0.1}$ 7
SIRUNYAN
2019E
 CMS ${{\mathit p}}{{\mathit p}}$, 13 TeV, 35.9 fb${}^{-1}$
$1.0$ $\pm1.0$ $\pm0.1$ 7
SIRUNYAN
2019E
 CMS ${{\mathit p}}{{\mathit p}}$, 7, 8, 13 TeV
$-0.1$ $\pm1.4$ 8
AABOUD
2017Y
 ATLS ${{\mathit p}}{{\mathit p}}$, 7, 8, 13 TeV
$-0.1$ $\pm1.5$ 8
AABOUD
2017Y
 ATLS ${{\mathit p}}{{\mathit p}}$, 13 TeV
$0.1$ $\pm2.5$ 9
AAD
2016AN
 LHC ${{\mathit p}}{{\mathit p}}$, 7, 8 TeV
$-0.6$ $\pm3.6$ 9
AAD
2016AN
 ATLS ${{\mathit p}}{{\mathit p}}$, 7, 8 TeV
$0.9$ ${}^{+3.6}_{-3.5}$ 9
AAD
2016AN
 CMS ${{\mathit p}}{{\mathit p}}$, 7, 8 TeV
$<7.4$ 95 10
KHACHATRYAN
2015H
 CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit H}}{{\mathit X}}$, 7, 8 TeV
$<7.0$ 95 11
AAD
2014AS
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit H}}{{\mathit X}}$, 7, 8 TeV
1  AAD 2025AR search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ using 140 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV and 165 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ data at $\mathit E_{{\mathrm {cm}}}$ = 13.6 TeV. The quoted signal strength corresponds to a significance of 3.4 standard deviations assuming ${\mathit m}_{{{\mathit H}}}$ = 125.09 GeV.
2  CMS 2022 report combined results (see their Extended Data Table 2) using up to 138 fb${}^{-1}$ of data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV, assuming ${\mathit m}_{{{\mathit H}}}$ = 125.38 GeV. See their Fig. 2 right.
3  AAD 2025AR search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ using 165 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13.6 TeV. The quoted signal strength corresponds to a significance of 2.8 standard deviations assuming ${\mathit m}_{{{\mathit H}}}$ = 125.09 GeV.
4  AAD 2021 search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ using 139 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 2.0 standard deviations and is given for ${\mathit m}_{{{\mathit H}}}$ = 125.09 GeV. The upper limit on the cross section times branching fraction is 2.2 times the SM prediction at 95$\%$ CL, which corresponds to the branching fraction upper limit of $4.7 \times 10^{-4}$ (assuming SM production cross sections).
5  SIRUNYAN 2021 search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ using 137 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 3.0 standard deviations and is given for ${\mathit m}_{{{\mathit H}}}$ = 125.38 GeV.
6  SIRUNYAN 2019AT perform a combine fit to 35.9 fb${}^{-1}$ of data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV.
7  SIRUNYAN 2019E search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ using 35.9 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV and combine with results of 7 TeV (5.0 fb${}^{-1}$) and 8 TeV (19.7 fb${}^{-1}$). The upper limit at 95$\%$ CL on the signal strength is 2.9, which corresponds to the SM Higgs boson branching fraction to a muon pair of $6.4 \times 10^{-4}$.
8  AABOUD 2017Y use 36.1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV, 20.3 fb${}^{-1}$ at 8 TeV and 4.5 fb${}^{-1}$ at 7 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}}}$ = 125 GeV.
9  AAD 2016AN: In the fit, relative production cross sections are fixed to those in the Standard Model. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}}}$ = 125.09 GeV.
10  KHACHATRYAN 2015H use 5.0 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV and 19.7 fb${}^{-1}$ at 8 TeV. The quoted signal strength is given for ${\mathit m}_{{{\mathit H}}}$ = 125 GeV.
11  AAD 2014AS search for ${{\mathit H}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ 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 signal strength is given for ${\mathit m}_{{{\mathit H}}}$ = 125.5 GeV.
  References:
AAD 2025AR
PRL 135 231802 Evidence for the dimuon decay of the Higgs boson in pp collisions with the ATLAS detector
CMS 2022
NAT 607 60 A portrait of the Higgs boson by the CMS experiment ten years after the discovery
AAD 2021
PL B812 135980 A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector
SIRUNYAN 2021C
JHEP 2101 148 Measurement of the $t \bar{t} t \bar{t}$ production cross section in $p p$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
SIRUNYAN 2019E
PRL 122 021801 Search for the Higgs boson decaying to two muons in proton-proton collisions at $\sqrt{s} =$ 13 TeV
SIRUNYAN 2019AT
EPJ C79 421 Combined measurements of Higgs boson couplings in proton?proton collisions at $\sqrt{s}=13\,\text {Te}\text {V} $
AABOUD 2017Y
PRL 119 051802 Search for the Dimuon Decay of the Higgs Boson in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 13 TeV with the ATLAS Detector
AAD 2016AN
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
KHACHATRYAN 2015H
PL B744 184 Search for a Standard Model-Like Higgs Boson in the ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ and ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Decay Channels at the LHC
AAD 2014AS
PL B738 68 Search for the Standard Model Higgs Boson Decay to ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ with the ATLAS Detector