Measurements of (tt)over-barH production and the CP structure of the Yukawa interaction between the Higgs Boson and top quark in the diphoton decay channel
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The first observation of the
t
¯
t
H
process in a single Higgs boson decay channel with the full reconstruction of the final state (
H
→
γ
γ
) is presented, with a significance of 6.6 standard deviations (
σ
). The
C
P
structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure
C
P
-odd structure of the top Yukawa coupling at
3.2
σ
. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy
√
s
=
13
TeV
collected by the CMS detector at the LHC, corresponding to an integrated luminosity of
137
fb
−
1
. The cross section times branching fraction of the
t
¯
t
H
process is measured to be
σ
t
¯
t
H
B
γ
γ
=
1.56
+
0.34
−
0.32
fb
, which is compatible with the standard model prediction of
1.13
+
0.08
−
0.11
fb
. The fractional contribution of the
C
P
-odd component is measured to be
f
H
t
t
C
P
=
0.00
±
0.33
.
t
¯
t
H
process in a single Higgs boson decay channel with the full reconstruction of the final state (
H
→
γ
γ
) is presented, with a significance of 6.6 standard deviations (
σ
). The
C
P
structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure
C
P
-odd structure of the top Yukawa coupling at
3.2
σ
. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy
√
s
=
13
TeV
collected by the CMS detector at the LHC, corresponding to an integrated luminosity of
137
fb
−
1
. The cross section times branching fraction of the
t
¯
t
H
process is measured to be
σ
t
¯
t
H
B
γ
γ
=
1.56
+
0.34
−
0.32
fb
, which is compatible with the standard model prediction of
1.13
+
0.08
−
0.11
fb
. The fractional contribution of the
C
P
-odd component is measured to be
f
H
t
t
C
P
=
0.00
±
0.33
.
Date Issued
2020-08-05
Date Acceptance
2020-08-01
Citation
Physical Review Letters, 2020, 125 (6), pp.061801 – 1-061801 – 18
ISSN
0031-9007
Publisher
American Physical Society
Start Page
061801 – 1
End Page
061801 – 18
Journal / Book Title
Physical Review Letters
Volume
125
Issue
6
Copyright Statement
© 2020 CERN, for the CMS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
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http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000555785600002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
SEARCH
Publication Status
Published
Article Number
ARTN 061801
Date Publish Online
2020-08-05