Skip to main content
eScholarship
Open Access Publications from the University of California

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

  • Author(s): Aad, G
  • Abbott, B
  • Abbott, DC
  • Abed Abud, A
  • Abeling, K
  • Abhayasinghe, DK
  • Abidi, SH
  • AbouZeid, OS
  • Abraham, NL
  • Abramowicz, H
  • Abreu, H
  • Abulaiti, Y
  • Acharya, BS
  • Achkar, B
  • Adachi, S
  • Adam, L
  • Adam Bourdarios, C
  • Adamczyk, L
  • Adamek, L
  • Adelman, J
  • Adersberger, M
  • Adiguzel, A
  • Adorni, S
  • Adye, T
  • Affolder, AA
  • Afik, Y
  • Agapopoulou, C
  • Agaras, MN
  • Aggarwal, A
  • Agheorghiesei, C
  • Aguilar-Saavedra, JA
  • Ahmadov, F
  • Ahmed, WS
  • Ai, X
  • Aielli, G
  • Akatsuka, S
  • Åkesson, TPA
  • Akilli, E
  • Akimov, AV
  • Al Khoury, K
  • Alberghi, GL
  • Albert, J
  • Alconada Verzini, MJ
  • Alderweireldt, S
  • Aleksa, M
  • Aleksandrov, IN
  • Alexa, C
  • Alexopoulos, T
  • Alfonsi, A
  • Alfonsi, F
  • Alhroob, M
  • Ali, B
  • Aliev, M
  • Alimonti, G
  • Allaire, C
  • Allbrooke, BMM
  • Allen, BW
  • Allport, PP
  • Aloisio, A
  • Alonso, F
  • Alpigiani, C
  • Alshehri, AA
  • Alunno Camelia, E
  • Alvarez Estevez, M
  • Alviggi, MG
  • Amaral Coutinho, Y
  • Ambler, A
  • Ambroz, L
  • Amelung, C
  • Amidei, D
  • Amor Dos Santos, SP
  • Amoroso, S
  • Amrouche, CS
  • An, F
  • Anastopoulos, C
  • Andari, N
  • Andeen, T
  • Anders, CF
  • Anders, JK
  • Andreazza, A
  • Andrei, V
  • Anelli, CR
  • Angelidakis, S
  • Angerami, A
  • Anisenkov, AV
  • Annovi, A
  • Antel, C
  • Anthony, MT
  • Antipov, E
  • Antonelli, M
  • Antrim, DJA
  • Anulli, F
  • Aoki, M
  • Aparisi Pozo, JA
  • Aperio Bella, L
  • Araque, JP
  • Araujo Ferraz, V
  • Araujo Pereira, R
  • Arcangeletti, C
  • Arce, ATH
  • et al.
Abstract

© 2020 The Author(s) 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.

Main Content
Current View