CP Properties of Higgs Boson Interactions with Top Quarks in the t t ¯ H and tH Processes Using H →γγ with the ATLAS Detector
G., Aad ; Åkesson, T. LU
; Bocchetta, S.
LU
; Corrigan, E.
LU
; Doglioni, C.
LU
; Geisen, J.
LU
; Gregersen, K.
LU
; Hansen, E.
LU
; Hedberg, V.
LU
and Jarlskog, G.
LU
, et al.
(2020)
In Physical Review Letters
125(6).
- Abstract
- A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production in association with a top quark pair (tt¯H) or single top quark (tH) is studied. The analysis uses 139 fb-1 of proton-proton collision data recorded at a center-of-mass energy of s=13 TeV with the ATLAS detector at the Large Hadron Collider. Assuming a CP-even coupling, the tt¯H process is observed with a significance of 5.2 standard deviations. The measured cross section times H→γγ branching ratio is 1.64-0.36+0.38(stat)-0.14+0.17(sys) fb, and the measured rate for tt¯H is 1.43-0.31+0.33(stat)-0.15+0.21(sys) times the... (More)
- A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production in association with a top quark pair (tt¯H) or single top quark (tH) is studied. The analysis uses 139 fb-1 of proton-proton collision data recorded at a center-of-mass energy of s=13 TeV with the ATLAS detector at the Large Hadron Collider. Assuming a CP-even coupling, the tt¯H process is observed with a significance of 5.2 standard deviations. The measured cross section times H→γγ branching ratio is 1.64-0.36+0.38(stat)-0.14+0.17(sys) fb, and the measured rate for tt¯H is 1.43-0.31+0.33(stat)-0.15+0.21(sys) times the Standard Model expectation. The tH production process is not observed and an upper limit on its rate of 12 times the Standard Model expectation is set. A CP-mixing angle greater (less) than 43 (-43)° is excluded at 95% confidence level. © 2020 CERN. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1a8c828d-869b-42fd-b7ad-5c189e9919df
- author
- G., Aad
; Åkesson, T.
LU
; Bocchetta, S.
LU
; Corrigan, E.
LU
; Doglioni, C.
LU
; Geisen, J.
LU
; Gregersen, K.
LU
; Hansen, E.
LU
; Hedberg, V.
LU
and Jarlskog, G.
LU
, et al. (More)
- G., Aad
; Åkesson, T.
LU
; Bocchetta, S.
LU
; Corrigan, E.
LU
; Doglioni, C.
LU
; Geisen, J.
LU
; Gregersen, K.
LU
; Hansen, E.
LU
; Hedberg, V.
LU
; Jarlskog, G.
LU
; Kellermann, E.
LU
; Konya, B.
LU
; Lytken, E.
LU
; Mankinen, K.
LU
; Marcon, C.
LU
; Mjörnmark, J.
LU
; Mullier, G.
LU
; Poettgen, R.
LU
; Poulsen, T.
LU
; Skorda, E.
LU
; Smirnova, O.
LU
and L., Zwalinski
(Less)
- author collaboration
- organization
- publishing date
- 2020-08-05
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Dynamic mechanical analysis, Branching ratio, Charge conjugation, Confidence levels, Large Hadron Collider, Production process, Proton proton collisions, Standard deviation, The standard model, Bosons, article, boson, conjugation, expectation, hadron, parity, quark
- in
- Physical Review Letters
- volume
- 125
- issue
- 6
- article number
- 061802
- publisher
- American Physical Society
- external identifiers
-
- scopus:85089979046
- ISSN
- 0031-9007
- DOI
- 10.1103/PhysRevLett.125.061802
- language
- English
- LU publication?
- yes
- id
- 1a8c828d-869b-42fd-b7ad-5c189e9919df
- date added to LUP
- 2022-04-04 15:20:05
- date last changed
- 2024-01-26 12:56:58
@article{1a8c828d-869b-42fd-b7ad-5c189e9919df,
abstract = {{A study of the charge conjugation and parity (CP) properties of the interaction between the Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton decay channel (H→γγ), and their production in association with a top quark pair (tt¯H) or single top quark (tH) is studied. The analysis uses 139 fb-1 of proton-proton collision data recorded at a center-of-mass energy of s=13 TeV with the ATLAS detector at the Large Hadron Collider. Assuming a CP-even coupling, the tt¯H process is observed with a significance of 5.2 standard deviations. The measured cross section times H→γγ branching ratio is 1.64-0.36+0.38(stat)-0.14+0.17(sys) fb, and the measured rate for tt¯H is 1.43-0.31+0.33(stat)-0.15+0.21(sys) times the Standard Model expectation. The tH production process is not observed and an upper limit on its rate of 12 times the Standard Model expectation is set. A CP-mixing angle greater (less) than 43 (-43)° is excluded at 95% confidence level. © 2020 CERN.}},
author = {{G., Aad and Åkesson, T. and Bocchetta, S. and Corrigan, E. and Doglioni, C. and Geisen, J. and Gregersen, K. and Hansen, E. and Hedberg, V. and Jarlskog, G. and Kellermann, E. and Konya, B. and Lytken, E. and Mankinen, K. and Marcon, C. and Mjörnmark, J. and Mullier, G. and Poettgen, R. and Poulsen, T. and Skorda, E. and Smirnova, O. and L., Zwalinski}},
issn = {{0031-9007}},
keywords = {{Dynamic mechanical analysis; Branching ratio; Charge conjugation; Confidence levels; Large Hadron Collider; Production process; Proton proton collisions; Standard deviation; The standard model; Bosons; article; boson; conjugation; expectation; hadron; parity; quark}},
language = {{eng}},
month = {{08}},
number = {{6}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{CP Properties of Higgs Boson Interactions with Top Quarks in the t t ¯ H and tH Processes Using H →γγ with the ATLAS Detector}},
url = {{http://dx.doi.org/10.1103/PhysRevLett.125.061802}},
doi = {{10.1103/PhysRevLett.125.061802}},
volume = {{125}},
year = {{2020}},
}