August 23, 2021 to October 7, 2021
Venue: OAC conference center, Kolymbari, Crete, Greece. Participation is possible also via internet.
Europe/Athens timezone

Constraints on off-shell Higgs boson production and the Higgs boson total width in ZZ final states with the ATLAS detector

Aug 31, 2021, 7:08 PM
Room 1

Room 1

Poster presentation Poster Session


Theodota Lagouri (Instituto De Alta Investigacion Universidad de Tarapaca (CL))


The off-shell production of SM Higgs boson, at the high-mass off-peak region beyond
2mZ, well above the measured resonance mass of mH=125 GeV, has a substantial cross
section at the LHC, due to the increased phase space as the Z bosons become on-shell
with the increasing energy scale. This presents a novel way of characterizing the
properties of the Higgs boson in terms of the off-shell event yields, normalized to the
SM prediction (referred to as signal strength µ), and the associated off-shell Higgs
boson couplings. Assuming the ratio of the Higgs boson couplings to the SM predictions
is independent of the momentum transfer of the Higgs boson production mechanism, a
combination with the on-shell signal-strength measurement was used to set indirect
limits on the total Higgs boson width with the ATLAS data collected in proton-proton
collisions at the centre-of-mass energy of √s = 13 TeV (36 fb-1).


Theodota Lagouri

Is this abstract from experiment? Yes
Name of experiment and experimental site ATLAS
Is the speaker for that presentation defined? Yes
Internet talk Maybe

Primary author

Theodota Lagouri (Instituto De Alta Investigacion Universidad de Tarapaca (CL))

Presentation materials