Conveners
Session 4: Afternoon Session 2
- Davide Napoletano (Universita & INFN, Milano-Bicocca (IT))
Session 4: Afternoon Session 4
- Alexander Penin
Session 4: Afternoon Session 6
- Davison Soper (University of Oregon (US))
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Florian Herren (Fermilab)26/06/2023, 15:45
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Benoit Assi (Fermilab)26/06/2023, 16:10
We present a simple model for massive parton evolution that replaces the explicit angular ordering of the coherent branching formalism with a differentially accurate simulation of soft-gluon radiation by means of a non-trivial dependence on azimuthal angles. In the new algorithm, initial and final state evolution are treated on the same footing. We provide an implementation for final-state...
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Dr Alexander Karlberg (CERN)26/06/2023, 16:35
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Mr Riccardo Nagar (University of Milan Bicocca)26/06/2023, 17:00
The GENEVA Monte Carlo event generator interfaces fully-differential fixed order calculations up to NNLO with high-order resummation in a 0-jet resolution variable and with parton showers, by combining them at the appropriate scales. The resulting simulated events have therefore NNLO accuracy in the fixed-order region and NNLL' accuracy in the resummation region. The parton shower matching is...
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Mr Jérémy Paltrinieri (University of Edinburgh)27/06/2023, 16:10
LHC data is forcing the theory community to push their calculations to an unprecedented level of precision in multiple phase-space regions. In the High-Energy region, the perturbative convergence of the hard scattering cross-sections can be impeded by large logarithms in $s/t$ which can be numerically significant at LHC energies. These logarithms are especially important in key regions of...
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Ryan Plestid27/06/2023, 16:35
Superallowed ($0^+\rightarrow 0^+$) beta decays provide the most precise extraction of $|V_{ud}|$ and require radiative corrections at a precision of roughly 100 ppm. In regions where photon wavelengths are long compared to the radius of the nucleus these corrections are coherently enhanced by the nuclear charge, $Z\in [6,37]$. In this talk I will describe how effective field theory can be...
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Matthias Weißwange (TU Dresden)27/06/2023, 17:00
The dimensional renormalization of chiral gauge theories such as the electroweak Standard Model inevitably leads to the problem of accommodating the manifestly 4-dimensional nature of $\gamma_{5}$ in $D$ dimensions. In order to avoid inconsistencies at the multi-loop level, $\gamma_{5}$ can be treated rigorously as a non-anticommuting object using the Breitenlohner-Maison/'t Hooft-Veltman...
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Dr Sandra Kvedaraite28/06/2023, 15:45
The Kaon bag parameter, $B_K$, is a key non-perturbative ingredient in the search for new physics through CP-violation. It parameterizes the QCD hadronic matrix element of the effective weak $\Delta S=2$ four-quark operator which can be computed non-perturbatively on the lattice. The perturbative matching of $B_K$ between the lattice renormalization schemes and $\overline{\mbox{MS}}$ scheme...
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Tom Steudtner28/06/2023, 16:10
In this talk I present our high-precision estimate for the conformal window of the interacting UV fixed point in the Litim-Sannino model.
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Four loop gauge, three loop Yukawa and three loop quartic beta functions are determined both by a direct loop calculation and by generalizing existing literature results.
The UV fixed point and corresponding critical exponents are determined at N$^3$LO in... -
LANCE Dixon28/06/2023, 16:35
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Michel Stillger (JGU Mainz)
The higher-order behavior of logarithmically enhanced contributions in non-global observables at hadron colliders is very intricate, in particular as double-logarithmic corrections arise first at four-loop order. For realistic values of the low energy scale and the partonic center-of-mass energy the contribution of these so called super-leading logarithms (SLLs) is comparable to the one of...
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