${{\mathit H}}$ 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.

${{\mathit c}}{{\overline{\mathit c}}}$ final state INSPIRE search

S126SCC
VALUE CL% DOCUMENT ID TECN  COMMENT
$\bf{ -0.5 \pm3.4}$ OUR AVERAGE
$-1.6$ $\pm4.5$ 1
HAYRAPETYAN
2026
CMS ${{\mathit p}}{{\mathit p}}$, ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}}$, 13 TeV
$1.0$ ${}^{+5.4}_{-5.2}$ 2
AAD
2025Y
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$, 13 TeV
• • • We do not use the following data for averages, fits, limits, etc. • • •
$<7.8$ 95 1
HAYRAPETYAN
2026
CMS ${{\mathit p}}{{\mathit p}}$, ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}}$, 13 TeV
$<11.5$ 95 2
AAD
2025Y
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$, 13 TeV
$9.4$ ${}^{+20.3}_{-19.9}$ 3
TUMASYAN
2023AD
 CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$ (boosted), 13 TeV
$<47$ 95 3
TUMASYAN
2023AD
 CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$ (boosted), 13 TeV
$<14$ 95 4
TUMASYAN
2023AH
 CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$, 13 TeV
$-9$ $\pm10$ $\pm11$ 5, 6
AAD
2022W
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$, 13 TeV
$-9$ $\pm10$ $\pm12$ 5, 7
AAD
2022W
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$, 13 TeV
$<26$ 95 5
AAD
2022W
 ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit W}}{{\mathit H}}/{{\mathit Z}}{{\mathit H}}$, 13 TeV
$37$ $\pm17$ ${}^{+11}_{-9}$ 8
SIRUNYAN
2020AE
 CMS ${{\mathit p}}{{\mathit p}}$, 13 TeV
$<110$ 95 9
AABOUD
2018M
 ATLS ${{\mathit p}}{{\mathit p}}$, 13 TeV
1  HAYRAPETYAN 2026 search for ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ together with the ${{\mathit t}}{{\overline{\mathit t}}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ measurement using 138 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The quoted limit corresponds to $\sigma _{{{\mathit t}} {{\overline{\mathit t}}} {{\mathit H}}}\cdot{}$B( ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$) $<$ $0.11$ pb at 95$\%$ CL.
2  AAD 2025Y present measurements of ${{\mathit V}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ and ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ (${{\mathit V}}$ = ${{\mathit W}}$ , ${{\mathit Z}}$) using 140 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. Two-dimensional likelihood scan of (${{\mathit \mu}^{bb}_{VH}}$, ${{\mathit \mu}^{cc}_{VH}}$) is shown in their Fig. 11.
3  TUMASYAN 2023AD search for Higgs produced with transverse momenta greater than 450 GeV and decaying to ${{\mathit c}}{{\overline{\mathit c}}}$ using 138 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV.
4  TUMASYAN 2023AH search for ${{\mathit V}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ (${{\mathit V}}$ = ${{\mathit W}}$ , ${{\mathit Z}}$) using 138 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The upper limit on ${\mathit \sigma (}$ ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit V}}{{\mathit H}}{)}\cdot{}$B( ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$) is 0.94 pb at 95$\%$ CL. See their Fig. 4. The quoted values are given for ${\mathit m}_{{{\mathit H}}}$ = 125.38 GeV.
5  AAD 2022W search for ${{\mathit V}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ (${{\mathit V}}$ = ${{\mathit W}}$ , ${{\mathit Z}}$) using 139 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collision data at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The results are given for ${\mathit m}_{{{\mathit H}}}$ = 125 GeV.
6  The analysis of ${{\mathit V}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ is combined with ${{\mathit V}}{{\mathit H}}$, ${{\mathit H}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ (AAD 2021AB). The ratio $\vert {{\mathit \kappa}_{{{c}}}}/{{\mathit \kappa}_{{{b}}}}\vert $ is constrained to be less than 4.5 at 95$\%$ CL. See their Fig. 7.
7  The constraint on the charm Yukawa coupling modifier ${{\mathit \kappa}_{{{c}}}}$ is measured to be $\vert {{\mathit \kappa}_{{{c}}}}\vert $ $<$8.5 at 95$\%$ CL. See their Fig. 4.
8  SIRUNYAN 2020AE use 35.9 fb${}^{-1}$ at of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The measured best fit value of ${\mathit \sigma (}$ ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit V}}{{\mathit H}}{)}\cdot{}$B( ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$) is $2.40$ ${}^{+1.12}_{-1.11}{}^{+0.65}_{-0.61}$ pb (equivalent to $<$ 4.5 pb at 95$\%$ CL upper limit, i.e. 70 times the standard model), where ${{\mathit V}}$ is ${{\mathit W}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit \nu}}$, ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}$, or ${{\mathit Z}}$ $\rightarrow$ ${{\mathit \nu}}{{\mathit \nu}}$ (${{\mathit \ell}}$ = ${{\mathit e}}$ , ${{\mathit \mu}}$). The quoted values are given for ${\mathit m}_{{{\mathit H}}}$ = 125 GeV.
9  AABOUD 2018M use 36.1 fb${}^{-1}$ at of ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 13 TeV. The upper limit on ${\mathit \sigma (}$ ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit Z}}{{\mathit H}}{)}\cdot{}$B( ${{\mathit H}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$) is 2.7 pb at 95$\%$ CL. This corresponds to 110 times the standard model. The quoted values are given for ${\mathit m}_{{{\mathit H}}}$ = 125 GeV.
  References:
HAYRAPETYAN 2026
PRL 136 011801 Simultaneous probe of the charm and bottom quark Yukawa couplings using ttH events
AAD 2025Y
JHEP 2504 075 Measurements of $WH$ and $ZH$ production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in $13\,\mathrm{TeV}$$pp$ collisions with the ATLAS detector
TUMASYAN 2023AD
PRL 131 041801 Search for Higgs Boson and Observation of Z Boson through their Decay into a Charm Quark-Antiquark Pair in Boosted Topologies in Proton-Proton Collisions at s=13??TeV
TUMASYAN 2023AH
PRL 131 061801 Search for Higgs boson decay to a charm quark-antiquark pair in proton-proton collisions at $\sqrt{s}$ = 13 TeV
AAD 2022W
EPJ C82 717 Direct constraint on the Higgs-charm coupling from a search for Higgs boson decays into charm quarks with the ATLAS detector
SIRUNYAN 2020AE
JHEP 2003 131 A search for the standard model Higgs boson decaying to charm quarks
AABOUD 2018M
PRL 120 211802 Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment