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Test of CP invariance in vector-boson fusion production of the Higgs boson in the H → ττ channel in proton–proton collisions at [Formula presented] with the ATLAS detector

Aad G.
•
Abbott B.
•
Abbott D. C.
altro
Zwalinski L.
2020
  • journal article

Periodico
PHYSICS LETTERS. SECTION B
Abstract
A test of CP invariance in Higgs boson production via vector-boson fusion is performed in the H→ττ decay channel. This test uses the Optimal Observable method and is carried out using 36.1fb−1 of s=13TeV proton–proton collision data collected by the ATLAS experiment at the LHC. Contributions from CP-violating interactions between the Higgs boson and electroweak gauge bosons are described by an effective field theory, in which the parameter d ̃ governs the strength of CP violation. No sign of CP violation is observed in the distributions of the Optimal Observable, and d ̃ is constrained to the interval [−0.090, 0.035] at the 68% confidence level (CL), compared to an expected interval of d ̃∈[−0.035,0.033] based upon the Standard Model prediction. No constraints can be set on d ̃ at 95% CL, while an expected 95% CL interval of d ̃∈[−0.21,0.15] for the Standard Model hypothesis was expected.
DOI
10.1016/j.physletb.2020.135426
Archivio
http://hdl.handle.net/11390/1181622
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85083848002
Diritti
open access
Scopus© citazioni
12
Data di acquisizione
Jun 2, 2022
Vedi dettagli
Web of Science© citazioni
22
Data di acquisizione
Mar 23, 2024
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