Conveners
Track 2 - Pheno Top: Parallel Session V
- Vasily Sotnikov
Track 2 - Pheno Top: Parallel Session VI
- Stefano Pozzorini
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Mattia Pozzoli (University of Bologna and INFN)10/8/26, 11:15 AM1
In this talk I will present NNLO QCD predictions for the production of a top-antitop quark pair in association with a W boson. While results for this process have previously been obtained employing dynamical approximations for the two-loop virtual correction, this computation is based on the first direct calculation of the two-loop QCD amplitude in the leading-colour approximation. I will...
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Heribertus Bayu Hartanto (Asia Pacific Center for Theoretical Physics)10/8/26, 11:40 AM1
I will present next-to-next-to-leading-order (NNLO) QCD predictions for top-quark pair production in association with a jet at the LHC. I will first describe the computation of the two-loop scattering amplitudes in the leading-colour approximation and discuss the impact of the higher-order corrections on the total cross section and selected differential distributions.
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Dr Xiang Chen (University of Zurich)10/8/26, 12:05 PM
The production of a top–antitop quark pair in association with a Higgs boson (ttH) is a crucial process at the Large Hadron Collider (LHC), as it provides a direct probe of the top-quark Yukawa coupling. Previous phenomenological results for this process have relied on dynamical approximations to the two-loop virtual corrections, while the amplitudes themselves have not yet been calculated...
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Colomba Brancaccio (University of Turin)10/8/26, 12:30 PM1
In this talk, I will present the calculation of the Feynman integrals entering the two-loop scattering amplitudes for top–antitop pair production in association with a photon, in the leading-colour approximation, required for NNLO QCD predictions at hadron colliders.
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The kinematics of the process, involving six independent invariants and up to three massive propagators, leads to a high degree... -
Francesco Merlotti (ETH Zürich)10/8/26, 4:15 PM1
The production of identified hadrons in collider experiments provides a unique window into Quantum Chromodynamics (QCD) across a wide range of energy scales.
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Precision measurements at past, present, and future colliders increasingly demand equally precise theoretical predictions, requiring the interplay of perturbative calculations and global analyses of non-perturbative inputs.
Most... -
Giuseppe Bozzi (University of Cagliari and INFN, Cagliari)10/8/26, 4:40 PM1
We present the first extraction of the unpolarised gluon transverse-momentum-dependent (TMD) parton distribution from Higgs-boson production data at the LHC.
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The analysis is based on the currently available set of ATLAS and CMS measurements of the Higgs qT distribution at √s= 8 and 13 TeV in the diphoton and four-lepton decay channels.
Theoretical predictions are computed up to N3LL... -
Luca Maxia (LPTHE - CNRS et Sorbonne Université)10/8/26, 5:05 PM1
Perturbative instabilities at next-to-next-to-leading order (NNLO) have become a recurring challenge in theoretical predictions for quarkonium production and decay within the NRQCD framework, often leading to large corrections, enhanced scale dependence, or even unphysical negative cross sections and decay widths. In this talk, I will present our recent work addressing the origin of these...
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Jianxiong Wang (Institute of High Energy Physics, Chinese Academy of Science)10/8/26, 5:30 PM
We address the long-standing problem of negative decay and production rates in perturbative QCD for exclusive processes by proposing amplitude-level NRQCD factorization as a systematic prescription. Building on this, we present the first complete next-to-next-to-leading-order (NNLO) QCD correction to the decay $J/\psi \to 3\gamma$. The resulting partial width, $\Gamma(J/\psi \to 3\gamma) =...
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Lorenzo Guerra (Max Planck Institute for Physics)10/8/26, 5:55 PM
We revisit the impact of electroweak (EW) radiative corrections on the kinematic distributions of charged leptons in neutrino-induced Charged-Current (CC) Deep Inelastic Scattering (DIS). We implement full Next-to-Leading Order (NLO) EW corrections to CC DIS in a flexible Monte Carlo framework, supplemented with higher-order logarithmically enhanced final-state QED radiation. We compare our...
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Pooja Mukherjee (Universität Hamburg)
The contribution of quarks with masses m ≫ ΛQCD is the only part of the structure functions in deep-inelastic scattering (DIS) which is not yet known at the next-to-next-to-leading order (NNLO) of perturbative QCD. We present improved partial NNLO results for the most important structure function F_2 .
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Shubhendu Prasad MANDAL (IJCLab, Universite Paris-Saclay)
The study of quarkonia, which are bound states consisting of a heavy quark and their anti-particle, is quite interesting as these can be used to probe the content of the proton in hadron-hadron collisions. As the strong coupling constant is not too small around the scale of the charm quark mass, perturbative QCD corrections can be large and significant for quarkonium phenomenology. In this...
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