Conveners
Thursday Session A: EFT & Precision
- Sandra Kortner (Max Planck Society (DE))
- Adinda De Wit (University of Zurich (CH))
- Lorenzo Bianchini (Universita & INFN Pisa (IT))
Thursday Session A: Precision & Double Higgs
- Ramona Groeber (Università di Padova and INFN, Sezione di Padova)
- Raoul Horst Rontsch
- Paolo Mastrandrea (Universita & INFN Pisa (IT))
The Higgs sector is a possible avenue for searches of BSM sources of CP violation, with V(V=W,Z)H production offering a way to separately probe the HWW and HZZ interactions, not possible in channels such as weak boson fusion. In this work, we search for CP-violating (CP-odd) EFT components in the HWW interaction via leptonic WH production - W(-> l \nu)H. This is a channel which allows high...
The CP properties of the Higgs boson couplings to weak bosons can be probed in production by exploiting the Vector Boson Fusion process, or by studying the properties of the Higgs decay to two Z bosons. This talk presents the measurement of the CP properties to weak bosons by the ATLAS experiment using Higgs to two photon decays in VBF production, or Higgs to four leptons decays, and the full...
Measurements of the inclusive and differential fiducial cross sections of Higgs boson decaying to a pair of photons are presented. The analysis is performed using proton-proton collisions data recorded with the CMS detector at the LHC at a centre-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb−1. The measurements performed in fiducial regions target different...
Higgs boson decays to two photons can be selected with high efficiency, and the very good invariant mass resolution allows a robust subtraction of the continuous backgrounds, making this channel an excellent tool both for precision measurements and searches for new phenomena involving the Higgs boson. This talk presents measurements of Simplified Template Cross Sections, differential and...
The Higgs boson decays to two W bosons has the largest bosonic branching fraction and can be used to perform some of the most precise measurements of the Higgs boson production cross sections. This talk will present Higgs boson cross section measurements by the ATLAS experiment in the H->WW* decay channel using pp collision data collected at 13 TeV, including those for different Higgs boson...
With the large data set collected during Run 2 of the LHC, it is possible to go beyond inclusive Higgs boson cross section measurements. One way in which this is done is through the simplified template cross sections (STXS), which make use of several variables to divide up the phase space of the different Higgs boson production modes. The binning is designed to be particularly sensitive to...
At high energies, fixed-order predictions for the production of a Higgs boson together with one or more jets suffer from large logarithms in invariant masses over transverse momenta. We resum these high-energy logarithms to all orders using the High Energy Jets (HEJ) framework, retaining the exact dependence on the top-quark mass. We compare our predictions to ATLAS and CMS measurements at 8...
Collider experiments will achieve percent level precision measurements of several processes key to answer some of the most pressing questions of contemporary particle physics. In this talk I will show that the capability to predict and describe such observables at next-to-next-to-next-to-leading order (N3LO) in QCD perturbation theory is crucial to fully exploit these experimental...
We present NLO QCD corrections to ZH production in gluon fusion, including the effects of the top-quark mass. Our results are obtained by combining virtual corrections evaluated numerically using sector decomposition with virtual corrections obtained in an high-energy expansion.
We discuss the uncertainties related to the top-quark mass renormalization scheme and we present phenomenological results.
We present the calculation of the virtual QCD corrections to gg → HH and gg → ZH. The results are obtained combining an expansion in the small transverse momentum of the final particles with an expansion valid at high energies, and extending the range of validity of both expansions using Padé approximants. This approach can reproduce the available numerical results retaining the exact top...
Higgs-boson pair production at hadron colliders is dominantly mediated by
the loop-induced gluon-fusion process gg→HH that is generated by heavy
top loops within the Standard Model with a minor per-cent level
contamination of bottom-loop contributions. The QCD corrections turn out
to be large for this process. In this talk, we discuss the
top-Yukawa-induced part of the electroweak...
In this talk, I will present a first look at the two-loop electroweak
corrections to Higgs boson pair production in gluon-fusion, which
might have a sizeable impact on the cross section. We have performed an
analytic calculation of the two-loop diagrams contributing
to gg->HH where a virtual Higgs boson is exchanged in the top quark loop.
I will briefly describe our method used to solve...
