Accessed 673 times
Last updated on 2021-03-16 13:30
Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel
The first observation of the $\mathrm{t\bar{t}}$H process in a single Higgs boson decay channel with the full reconstruction of the final state (H$\to\gamma\gamma$) is presented, with a significance of 6.6 standard deviations ($\sigma$). The CP structure of Higgs boson couplings to fermions is measured, resulting in an exclusion of the pure CP-odd structure of the top Yukawa coupling at 3.2$\sigma$. The measurements are based on a sample of proton-proton collisions at a center-of-mass energy $\sqrt{s} =$ 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 $\mathrm{t\bar{t}}$H process is measured to be $\sigma_{\mathrm{t\bar{t}H}}\mathcal{B}_{\gamma\gamma} =$ 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 CP-odd component is measured to be $f^{\mathrm{Htt}}_\mathrm{CP} =$ 0.00 $\pm$ 0.33.
Revise your submission
This submission is already
finished. Uploading a new file
will create a new version, and will require
approval by the submission coordinator before
being available publicly.
When using this data, please cite the original publication:
CMS
Collaboration
(2020).
Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel. Phys.Rev.Lett. 125 (2020) 061801.
Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel. HEPData (collection).
https://doi.org/10.17182/hepdata.94286
or, if you prefer, a specific version of the
record:
CMS
Collaboration
(2021).
Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.94286.v1
You can also cite the 5 data
tables
individually.
Data tables
Choose table:
CMS
Collaboration
(2021).
“Table 1” of “Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.94286.v1/t1
CMS
Collaboration
(2021).
“Table 2” of “Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.94286.v1/t2
CMS
Collaboration
(2021).
“Table 3” of “Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.94286.v1/t3
CMS
Collaboration
(2021).
“Table 4” of “Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.94286.v1/t4
CMS
Collaboration
(2021).
“Table 5” of “Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.94286.v1/t5
When using this data, please cite the original publication:
CMS
Collaboration
(2020).
Measurements of $\mathrm{t\bar{t}}$H production and the CP structure of the Yukawa interaction between the Higgs boson and top quark in the diphoton decay channel. Phys.Rev.Lett. 125 (2020) 061801.
or, if you prefer, a specific version of the
record:
You can also cite the 5 data
tables
individually.
Data tables
Choose table:
Ask a Question
Your question will be emailed to those involved with the submission.
Please mention the relevant table.
Please log in to HEPData to send a question.
Notify participants
Clicking Notify Participants will email all primary uploaders and
reviewers of this submission with your message and (optionally) the status
and messages for each table.
Emails sent.
Notify coordinator
Clicking Notify Coordinator will email the coordinator of this submission
to inform them that all tables have been approved.