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Combination of Measurements of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>C</mml:mi> <mml:mi>P</mml:mi> </mml:math> Properties of Higgs Boson Interactions with Vector Bosons Using Proton-Proton Collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msqrt> <mml:mrow> <mml:mi>s</mml:mi> </mml:mrow> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mtext> </mml:mtext> <mml:mtext> </mml:mtext> <mml:mi>TeV</mml:mi> </mml:mrow> </mml:math> with the ATLAS Detector

2026/03/20 by G. Aad, The ATLAS Collaboration, E. Aakvaag +97
Physics and Astronomy · #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research #Particle Detector Development and Performance

paper · pdf · doi:10.1103/54vv-lgc7

Abstract

A combination of measurements of the CP properties of Higgs boson interactions with electroweak gauge bosons is presented, using 140 fb-1 of proton-proton collisions at sqrt[s]=13 TeV recorded by the ATLAS detector. Results from vector boson fusion H→ττ/WW*/γγ, inclusive H→ZZ*, and WH,H→bb[over ¯] channels are combined. No evidence of CP violation is observed, and constrains on the CP-violating operators in the Standard Model effective field theory framework (SMEFT) are set in the Warsaw basis. The results from the combination improve by over 40% on previous individual limits on cHW[over ˜] and, for the first time, simultaneous constraints on three coefficients cHW[over ˜], cHB[over ˜], and cHW[over ˜]B are set. These limits are the most stringent constraints to date on the relevant Wilson coefficients in the SMEFT framework with minimum model dependence.

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