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

Area of Science:

• High Energy Physics
• Particle Physics
• Standard Model of Particle Physics

Background:

• The Standard Model (SM) describes fundamental particles and their interactions.
• Higgs boson pair production (HH) is a rare process sensitive to new physics beyond the SM.
• Understanding HH production is crucial for probing the Higgs sector and searching for new phenomena.

Purpose of the Study:

• To search for non-resonant and resonant Higgs boson pair production in proton-proton collisions.
• To set limits on the cross-section of HH production and constrain theories beyond the Standard Model.
• To investigate the potential existence of a narrow-width resonance decaying into two Higgs bosons.

Main Methods:

• Analysis of 36.1 fb⁻¹ of proton-proton collision data at 13 TeV.
• Utilized the ATLAS detector at the Large Hadron Collider.
• Searched for specific final states indicative of Higgs boson pair production.

Main Results:

• No significant deviation from Standard Model predictions was observed.
• An observed upper limit of 7.7 pb was set on the non-resonant HH production cross-section.
• Observed upper limits for a resonance X decaying to HH were set between 40.0 and 6.1 pb for resonance masses from 260 to 500 GeV.

Conclusions:

• The results are consistent with the Standard Model.
• The study provides stringent constraints on non-resonant and resonant Higgs boson pair production.
• No evidence for new physics in the studied channels was found.