ATLAS
PRELIMINARY
BEYOND SM
Study of Higgs-boson production with large transverse momentum using the HbbˉH\rightarrow b\bar{b} decay with the ATLAS detector

This note reports studies of Higgs boson production with sizeable transverse momentum decaying to a bbˉb\bar{b} quark pair. The analyzed data were recorded with the ATLAS detector in proton-proton collisions with a center-of-mass energy of s=13\sqrt{s}=13~TeV at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 136~fb1^{-1}. Higgs bosons decaying to bbˉb\bar{b} are reconstructed as single large-radius jets and identified by the experimental signature of two bb-hadron decays. The experimental techniques are validated in the same kinematic regime using the ZbbˉZ\rightarrow b\bar{b} process. For Higgs boson production at transverse momenta above 450 GeV, the production cross section is found to be 13\pm 57 \text{(stat.)} \pm 22 \text{(syst.)} \pm 3 \text{(theo.)} \mathrm{~fb}. The differential cross section 95% confidence level upper limits as a function of Higgs boson transverse momentum are \sigma_{H}(300< p_{\text{T}}^{H}<450~\mathrm{~GeV}) < 2.8~\mathrm{~pb}, \sigma_{H}(450< p_{\text{T}}^{H}<650~\mathrm{~GeV}) < 91~\mathrm{~fb}, \sigma_{H}(p_{\text{T}}^{H}>650~\mathrm{~GeV}) < 40.5~\mathrm{~fb}, and \sigma_{H}(p_{\text{T}}^{H}>1~\mathrm{~TeV}) < 10.3~\mathrm{~fb}. All results are consistent with the Standard Model predictions.

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