Search for Higgs boson pair production in the gammagammaWW channel using p p collision data recorded at 13 TeV with the ATLAS detector

ATLAS COLL. , M. AABOUD, M.T. DOVA ET AL.

EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS

SPRINGER

Año: 2019

1434-6044

Searches for non-resonant and resonant Higgs boson pair production are performed in the gammagamma WW channel with the final state of gammagammalnu j j using 36.1 fb−1 of proton?proton collision data recorded at a centre-of-mass energy of ps =13 TeV by the ATLAS detector at the Large Hadron Collider. No significant deviation from the Standard Model prediction is observed. A 95% confidence-level observed upper limit of 7.7 pb is set on the cross section for nonresonant production, while the expected limit is 5.4 pb. A search for a narrow-width resonance X decaying to a pair of Standard Model Higgs bosons HH is performed with the same set of data, and the observed upper limits on sigma(pp --> X)xB(X --> HH) range between 40.0 pb and 6.1 pb for masses of the resonance between 260 GeV and 500 GeV, while the expected limits range between 17.6 pb and 4.4 pb. When deriving the limits above, the Standard Model branching ratios of the H-->gammagamma and H-->WW are assumed.