Measurement of the Higgs boson mass in the H → Z Z∗ → 4ℓ and H → γγ channels with √s = 13 TeV pp collisions using the ATLAS detector

Abstract

The mass of the Higgs boson is measured in the H → ZZ*→4ℓ and in the H → γγ decay channels with 36.1 fb−1 of proton–proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector in 2015 and 2016. The measured value in the H → ZZ*→4ℓ channel is <math><msubsup is="true"><mrow is="true"><mi is="true">m</mi></mrow><mrow is="true"><mi is="true">H</mi></mrow><mrow is="true"><mi is="true">Z</mi><msup is="true"><mrow is="true"><mi is="true">Z</mi></mrow><mrow is="true"><mo is="true">⁎</mo></mrow></msup></mrow></msubsup><mo is="true">=</mo><mn is="true">124.79</mn><mo is="true">±</mo><mn is="true">0.37</mn><mspace width="0.25em" is="true"></mspace><mtext is="true">GeV</mtext></math>, while the measured value in the H → γγ channel is <math><msubsup is="true"><mrow is="true"><mi is="true">m</mi></mrow><mrow is="true"><mi is="true">H</mi></mrow><mrow is="true"><mi is="true">γ</mi><mi is="true">γ</mi></mrow></msubsup><mo is="true">=</mo><mn is="true">124.93</mn><mo is="true">±</mo><mn is="true">0.40</mn><mspace width="0.25em" is="true"></mspace><mtext is="true">GeV</mtext></math>. Combining these results with the ATLAS measurement based on 7 and 8 TeV proton–proton collision data yields a Higgs boson mass of mH = 124.97± 0.24 GeV.