Robert Harlander
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View article: A new approach to quark mass determination using the gradient flow
A new approach to quark mass determination using the gradient flow Open
A bstract We propose a new method to determine quark masses using ratios of the vacuum-expectation values ( vevs ) of flowed quark bilinear operators. They can be expressed as functions of the flow time t and the $$ \overline{\textrm{MS}} …
View article: Gradient flow for parton distribution functions: first application to the pion
Gradient flow for parton distribution functions: first application to the pion Open
Parton distribution functions (PDFs) are central to precision QCD phenomenology. Their Mellin moments can be computed on the lattice, but direct determinations using local operators, besides $\langle x \rangle$, face severe challenges from…
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi><mml:mi>H</mml:mi></mml:math> production at the LHC within SMEFT at next-to-next-to-leading order QCD
production at the LHC within SMEFT at next-to-next-to-leading order QCD Open
We study the impact of the pointlike qq¯′WH interactions originating from a subset of dimension-six operators of the Standard Model effective field theory (SMEFT) on the Higgs boson associated production pp→W+H at the LHC. For consistency,…
View article: A new approach to quark mass determination using the gradient flow
A new approach to quark mass determination using the gradient flow Open
We propose a new method to determine quark masses using ratios of the vacuum-expectation values (VEVs) of flowed quark bilinear operators. They can be expressed as functions of the flow time $t$ and the ${\overline {\rm MS}}$ quark mass $\…
View article: Two-loop gradient-flow renormalization of scalar QCD
Two-loop gradient-flow renormalization of scalar QCD Open
The gradient-flow formalism is applied to a non-Abelian gauge theory with scalar and fermionic particles, dubbed “scalar QCD”. It is shown that the flowed scalar quark requires a field renormalization, albeit only beyond the one-loop level…
View article: The life cycle of scientific principles—a template for characterizing physical principles
The life cycle of scientific principles—a template for characterizing physical principles Open
Scientific principles can undergo various developments. While philosophers of science have acknowledged that such changes occur, there is no systematic account of the development of scientific principles. Here we propose a template for ana…
View article: The life cycle of scientific principles -- a template for characterizing physical principles
The life cycle of scientific principles -- a template for characterizing physical principles Open
Scientific principles can undergo various developments. While philosophers of science have acknowledged that such changes occur, there is no systematic account of the development of scientific principles. Here we propose a template for ana…
View article: $WH$ production at the LHC within SMEFT at next-to-next-to-leading order QCD
$WH$ production at the LHC within SMEFT at next-to-next-to-leading order QCD Open
We study the impact of $q \bar q' W$ and $q \bar q' WH$ interactions, originating from dimension-six operators of the Standard Model Effective Field Theory (SMEFT), on the Higgs boson associated production $pp \to W^+H$ at the LHC. We comp…
View article: FeynGame 3.0
FeynGame 3.0 Open
A major update of the program FeynGame is introduced. One of its main new functionalities is to visualize Feynman graphs generated by QGRAF. The QGRAF output can be either pasted into the FeynGame canvas for individual graphs, or the whole…
View article: Determining the Quark Mass with the Gradient Flow
Determining the Quark Mass with the Gradient Flow Open
We propose a new method to determine the quark mass by using bilinear operators of the flowed quark field defined within the gradient-flow formalism. This method enables the quark mass determination through a comparison of perturbative cal…
View article: Gradient Flow Renormalisation for Meson Mixing and Lifetimes
Gradient Flow Renormalisation for Meson Mixing and Lifetimes Open
Fermionic gradient flow in combination with the short-flow-time expansion provides a computational method where the renormalisation of hadronic matrix elements on the lattice can be simplified to address e.g. the issue that operators with …
View article: Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report
Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report Open
This report presents a short summary of the activities of the "Standard Model" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 12-30 June, 2023).
View article: Short-flow-time expansion of quark bilinears through next-to-next-to-leading order QCD
Short-flow-time expansion of quark bilinears through next-to-next-to-leading order QCD Open
A bstract The gradient-flow formalism proves to be a useful tool in lattice calculations of quantum chromodynamics. For example, it can be used as a scheme to renormalize composite operators by inverting the short-flow-time expansion of th…
View article: AutoEFT: Automated operator construction for effective field theories
AutoEFT: Automated operator construction for effective field theories Open
The program AutoEFT is described. It allows one to generate Effective Field Theories (EFTs) from a given set of fields and symmetries. Allowed fields include scalars, spinors, gauge bosons, and gravitons. The symmetries can be local or glo…
View article: The development of computational methods for Feynman diagrams
The development of computational methods for Feynman diagrams Open
Over the last 70 years, Feynman diagrams have played an essential role in the development of many theoretical predictions derived from the standard model Lagrangian. In fact, today they have become an essential and seemingly irreplaceable …
View article: FeynGame-2.1 -- Feynman diagrams made easy
FeynGame-2.1 -- Feynman diagrams made easy Open
FeynGame is an open-source software tool to draw Feynman diagrams, but also to get acquainted with their structure. This article reports on a number of new features which have been added to FeynGame since its first release. These include f…
View article: FeynGame-2.1 -- Feynman diagrams made easy
FeynGame-2.1 -- Feynman diagrams made easy Open
FeynGame is an open-source software tool to draw Feynman diagrams, but also to get acquainted with their structure. This article reports on a number of new features which have been added to FeynGame since its first release. These include f…
View article: Using Gradient Flow to Renormalise Matrix Elements for Meson Mixing and Lifetimes
Using Gradient Flow to Renormalise Matrix Elements for Meson Mixing and Lifetimes Open
Neutral meson mixing and meson lifetimes are theory-side parametrised in terms four-quark operators which can be determined by calculating weak decay matrix elements using lattice Quantum Chromodynamics.While calculations of meson mixing m…
View article: Short-flow-time expansion of quark bilinears through next-to-next-to-leading order QCD
Short-flow-time expansion of quark bilinears through next-to-next-to-leading order QCD Open
The gradient-flow formalism proves to be a useful tool in lattice calculations of quantum chromodynamics. For example, it can be used as a scheme to renormalize composite operators by inverting the short-flow-time expansion of the correspo…
View article: Using Gradient Flow to Renormalise Matrix Elements for Meson Mixing and Lifetimes
Using Gradient Flow to Renormalise Matrix Elements for Meson Mixing and Lifetimes Open
Neutral meson mixing and meson lifetimes are theory-side parametrised in terms four-quark operators which can be determined by calculating weak decay matrix elements using lattice Quantum Chromodynamics. While calculations of meson mixing …
View article: Erratum: Exact Top-Quark Mass Dependence in Hadronic Higgs Production [Phys. Rev. Lett. <b>127</b>, 162002 (2021)]
Erratum: Exact Top-Quark Mass Dependence in Hadronic Higgs Production [Phys. Rev. Lett. <b>127</b>, 162002 (2021)] Open
This corrects the article DOI: 10.1103/PhysRevLett.127.162002.
View article: AutoEFT: Automated Operator Construction for Effective Field Theories
AutoEFT: Automated Operator Construction for Effective Field Theories Open
The program AutoEFT is described. It allows one to generate Effective Field Theories (EFTs) from a given set of fields and symmetries. Allowed fields include scalars, spinors, gauge bosons, and gravitons. The symmetries can be local or glo…
View article: Standard model effective field theory up to mass dimension 12
Standard model effective field theory up to mass dimension 12 Open
We present a complete and nonredundant basis of effective operators for the Standard Model effective field theory up to mass dimension 12 with three generations of fermions. We also include operators coupling to gravity via the Weyl tensor…
View article: The end of the particle era?
The end of the particle era? Open
The discovery of the Higgs boson in 2012 at CERN completed the experimental confirmation of the Standard Model particle spectrum. Current theoretical insights and experimental data are inconclusive concerning the expectation of future disc…