Constraining the Higgs boson self-coupling from single- and double-Higgs production with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV

ATLAS Collaboration

Preprint

PUBDB-2022-07198

Constraining the Higgs boson self-coupling from single- and double-Higgs production with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV

ATLAS Collaboration (Collaboration author)DESY*

2022

[10.3204/PUBDB-2022-07198]

This record in other databases:

Please use a persistent id in citations: doi:10.3204/PUBDB-2022-07198

Report No.: CERN-EP-2022-149; arXiv:2211.01216

Abstract: Constraints on the Higgs boson self-coupling are set by combining double-Higgs boson analyses in the $b\bar{b}b\bar{b}$, $b\bar{b}\tau^+\tau^-$ and $b\bar{b} \gamma \gamma$ decay channels with single-Higgs boson analyses targeting the $\gamma \gamma$, $ZZ^*$, $WW^*$, $\tau^+ \tau^-$ and $b\bar{b}$ decay channels. The data used in these analyses were recorded by the ATLAS detector at the LHC in proton$-$proton collisions at $\sqrt{s}=13$ TeV and correspond to an integrated luminosity of 126$-$139 fb$^{-1}$. The combination of the double-Higgs analyses sets an upper limit of $\mu_{HH} < 2.4$ at 95% confidence level on the double-Higgs production cross-section normalised to its Standard Model prediction. Combining the single-Higgs and double-Higgs analyses, with the assumption that new physics affects only the Higgs boson self-coupling ($\lambda_{HHH}$), values outside the interval $-0.4< \kappa_{\lambda}=(\lambda_{HHH}/\lambda_{HHH}^{\textrm{SM}})< 6.3$ are excluded at 95% confidence level. The combined single-Higgs and double-Higgs analyses provide results with fewer assumptions, by adding in the fit more coupling modifiers introduced to account for the Higgs boson interactions with the other Standard Model particles.

Keyword(s): p p: colliding beams ; Higgs particle: interaction ; p p: scattering ; Higgs particle: hadroproduction ; Higgs particle: pair production ; Higgs particle: decay modes ; bottom: pair production ; photon: pair production ; W: pair production ; Z0: pair production ; tau: pair production ; Higgs particle: coupling ; ATLAS ; CERN LHC Coll ; new physics: search for ; channel cross section: upper limit ; coupling constant: upper limit ; experimental results ; 13000 GeV-cms

Note: 17 pages in total, author list starting page 1, 6 figures, 2 tables, submitted to Phys. Lett. B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2022-03

Contributing Institute(s):