Conveners
Track 3 - Precision Physics / BSM: Parallel Session V
- Matthias Kerner (KIT)
Track 3 - Precision Physics / BSM: Parallel Session VI
- Heidi Rzehak
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Marco Niggetiedt (University of Zurich)10/8/26, 11:15 AM
The decay into bottom quarks is the dominant decay channel of a Standard Model Higgs boson. Its precise theory description is crucial for extracting the bottom quark Yukawa coupling and mass from experimental measurements. The decay width has been computed through $\mathcal{O}(\alpha_s^4)$ assuming massless final states.
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We report on the status of the corresponding four-loop calculation... -
Adi Prasanna Suresh (SLAC and Stanford U.)10/8/26, 11:40 AM
We present recent progress toward the inclusive gluon-fusion Higgs-boson and Drell–Yan cross sections at next-to-next-to-next-to-next-to-leading order (N4LO) in perturbative QCD. Our main results concern the single-real contributions, involving three QCD partons together with a Higgs boson or virtual photon. These comprise the interference of one- and two-loop amplitudes and, in the...
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Federico Ripani10/8/26, 12:05 PM
We present the exact next-to-leading-order QCD corrections to the light-quark part of the mixed QCD-EW contributions to quark-induced Higgs production at the Large Hadron Collider, for a center-of-mass energy of 13 TeV, with exact EW-boson mass dependence. The relevant two-loop real-emission matrix elements, $gq(\overline{q})\to q(\overline{q})H$ and $q\overline{q}\to gH$, are computed using...
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Martin Gabelmann (U. Freiburg)10/8/26, 12:30 PM
Fully exploiting the precision of current and future collider measurements requires theory predictions of matching accuracy, and hence observables computed at next-to-leading order (NLO) and beyond. For any Beyond-the-Standard-Model scenario, such higher-order calculations require a complete and consistent renormalization of the model. We address this task for the general Two-Higgs-Doublet...
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Karim Elyaouti (KIT - Institut für Theoretische Physik)10/8/26, 4:15 PM
This talk presents the computation of the next-to-leading-order (NLO) QCD and electroweak (EW) corrections to the annihilation of dark matter particles into the dominant final states, processes that play a key role in determining the dark matter relic density. The analysis is performed within the Complex Singlet Extension of the Standard Model (CxSM), which enlarges the Standard Model scalar...
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Benjamin Campillo (KIT)10/8/26, 4:40 PM
Gluon-induced production of a Higgs boson in association with a Z-boson is an important Higgs production channel at the LHC. Precise theoretical predictions for this channel are therefore required, both within the Standard Model and beyond. Effects beyond the SM can be parametrized using the Standard Model Effective Field Theory (SMEFT).
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In this talk, we present the NLO QCD predictions for... -
Dr Christoph Borschensky (Karlsruhe Institute of Technology)10/8/26, 5:05 PM
In a supersymmetric theory, large mass hierarchies can lead to large uncertainties in fixed-order calculations of the SM-like Higgs mass. Reliable predictions in an effective field theory (EFT) framework involve the matching to the full supersymmetric theory at the high scale to include contributions from the heavy particles, and a subsequent renormalization-group running down to the low...
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Gabriele Fiore (ETH Zurich)10/8/26, 5:30 PM1
Identified hadron production in association with an electroweak gauge boson provides a powerful probe of QCD dynamics and hadron fragmentation in proton-proton collisions. We present next-to-next-to-leading-order (NNLO) QCD predictions for the associated production of a neutral electroweak gauge boson and an identified hadron at high energy colliders. The calculation employs the antenna...
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Ivan Novikov (KIT)10/8/26, 5:55 PM1
Reconstruction of distributions from Monte-Carlo simulations is a standard problem in high-energy physics.
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Traditionally, this is done by collecting the generated events in histograms. I will present an alternative approach, the main idea of which is to approximate the target distribution as a sum of orthogonal basis functions with coefficients that are given by certain moments of the target...