Vera Gülpers
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View article: Exploratory calculation of the rare hyperon decay Σ+ → pℓ+ℓ− from lattice QCD
Exploratory calculation of the rare hyperon decay Σ+ → pℓ+ℓ− from lattice QCD Open
A bstract The rare hyperon decay Σ + → pℓ + ℓ − is a flavour-changing neutral current process mediated by an s → d transition that occurs only at loop level within the Standard Model. Consequently, this decay is highly suppressed, making i…
View article: Physical-mass calculation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ρ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>770</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>K</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:mo stretchy="false">(</mml:mo><mml:mn>892</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> resonance parameters via <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>π</mml:mi><mml:mi>π</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi><mml:mi>π</mml:mi></mml:math> scattering amplitudes from lattice QCD
Physical-mass calculation of and resonance parameters via and scattering amplitudes from lattice QCD Open
We present our study of the ρ(770) and K*(892) resonances from lattice quantum chromodynamics (QCD) employing domain-wall fermions at physical quark masses. We determine the finite-volume energy spectrum in various momentum frames and obta…
View article: Light and Strange Vector Resonances from Lattice QCD at Physical Quark Masses
Light and Strange Vector Resonances from Lattice QCD at Physical Quark Masses Open
We present the first calculation at physical quark masses of scattering amplitudes describing the lightest pseudoscalar mesons interacting via the strong force in the vector channel. Using lattice quantum chromodynamics, we postdict the de…
View article: Split-even approach to the rare kaon decay $K \to π\ell^+ \ell^-$
Split-even approach to the rare kaon decay $K \to π\ell^+ \ell^-$ Open
In recent years the rare kaon decay has been computed directly at the physical point. However, this calculation is currently limited by stochastic noise stemming from a light and charm quark loop GIM subtraction. The split-even approach is…
View article: Towards a high-precision description of the ρ and K* resonances
Towards a high-precision description of the ρ and K* resonances Open
We summarise our determination of the $\\rho$ and $K^*$ resonance parameters from lattice QCD at a physical pion mass. The methods for computing correlation functions and extracting energy levels from an RBC-UKQCD domain-wall fermion ensem…
View article: Physical-mass calculation of $ρ(770)$ and $K^*(892)$ resonance parameters via $ππ$ and $K π$ scattering amplitudes from lattice QCD
Physical-mass calculation of $ρ(770)$ and $K^*(892)$ resonance parameters via $ππ$ and $K π$ scattering amplitudes from lattice QCD Open
We present our study of the $ρ(770)$ and $K^*(892)$ resonances from lattice quantum chromodynamics (QCD) employing domain-wall fermions at physical quark masses. We determine the finite-volume energy spectrum in various momentum frames and…
View article: Light and strange vector resonances from lattice QCD at physical quark masses
Light and strange vector resonances from lattice QCD at physical quark masses Open
We present the first ab initio calculation at physical quark masses of scattering amplitudes describing the lightest pseudoscalar mesons interacting via the strong force in the vector channel. Using lattice quantum chromodynamics, we postd…
View article: Update of Euclidean windows of the hadronic vacuum polarization
Update of Euclidean windows of the hadronic vacuum polarization Open
We compute the standard Euclidean window of the hadronic vacuum polarization using multiple independent blinded analyses. We improve the continuum and infinite-volume extrapolations of the dominant quark-connected light-quark isospin-symme…
View article: Efficiently unquenching QCD+QED at $\mathrm{O}(\alpha)$
Efficiently unquenching QCD+QED at $\mathrm{O}(\alpha)$ Open
We outline a strategy to efficiently include the electromagnetic interactions of the sea quarks in QCD+QED.\nWhen computing iso-spin breaking corrections to hadronic quantities at leading order in the electromagnetic coupling, the sea-quar…
View article: Progress on the exploratory calculation of the rare Hyperon decay $\Sigma^+ \to p \ell^+ \ell^-$
Progress on the exploratory calculation of the rare Hyperon decay $\Sigma^+ \to p \ell^+ \ell^-$ Open
The rare Hyperon decay $\Sigma^+ \to p \ell^+ \ell^-$ is an $s \to d$ flavour changing neutral current process, which is highly suppressed within the Standard Model, and is therefore sensitive to new physics. Due to recent improvements in …
View article: Efficiently unquenching QCD+QED at O($α$)
Efficiently unquenching QCD+QED at O($α$) Open
We outline a strategy to efficiently include the electromagnetic interactions of the sea quarks in QCD+QED. When computing iso-spin breaking corrections to hadronic quantities at leading order in the electromagnetic coupling, the sea-quark…
View article: Isospin-breaking corrections to light leptonic decays in lattice QCD+QED at the physical point
Isospin-breaking corrections to light leptonic decays in lattice QCD+QED at the physical point Open
We report on the physical-point RBC/UKQCD calculation of the leading isospin-breaking corrections to light-meson leptonic decays. This is highly relevant for future precision tests in the flavour physics sector, in particular the first-row…
View article: Progress on the exploratory calculation of the rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$
Progress on the exploratory calculation of the rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$ Open
The rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$ is an $s \to d$ flavour changing neutral current process, which is highly suppressed within the Standard Model, and is therefore sensitive to new physics. Due to recent improvements in exper…
View article: Isospin-breaking corrections to light leptonic decays in lattice QCD+QED at the physical point
Isospin-breaking corrections to light leptonic decays in lattice QCD+QED at the physical point Open
We report on the physical-point RBC/UKQCD calculation of the leading isospin-breaking corrections to light-meson leptonic decays. This is highly relevant for future precision tests in the flavour physics sector, in particular the first-row…
View article: Isospin-breaking corrections to light-meson leptonic decays from lattice simulations at physical quark masses
Isospin-breaking corrections to light-meson leptonic decays from lattice simulations at physical quark masses Open
The decreasing uncertainties in theoretical predictions and experimental measurements of several hadronic observables related to weak processes, which in many cases are now smaller than $\mathrm{O}(1\%)$, require theoretical calculations t…
View article: Prospects for a lattice calculation of the rare decay $Σ^+\to p\ell^+\ell^-$
Prospects for a lattice calculation of the rare decay $Σ^+\to p\ell^+\ell^-$ Open
We present a strategy for calculating the rare decay of a $Σ^+ (uus)$ baryon to a proton $(uud)$ and di-lepton pair using lattice QCD. To determine this observable one needs to numerically evaluate baryonic two-, three-, and four-point cor…
View article: Towards a lattice determination of the form factors of the rare Hyperon decay $\Sigma^+ \to p \ell^+ \ell^-$
Towards a lattice determination of the form factors of the rare Hyperon decay $\Sigma^+ \to p \ell^+ \ell^-$ Open
The rare Hyperon decay $\Sigma^+ \to p \ell^+ \ell^-$ is an $s \to d$ flavour changing neutral current, and is therefore suppressed in within the Standard Model, making it an excellent probe for new physics. The process is dominated by lon…
View article: Near Physical Point Lattice Calculation of Isospin-Breaking Corrections to $K_{\ell2}/\pi_{\ell2}$
Near Physical Point Lattice Calculation of Isospin-Breaking Corrections to $K_{\ell2}/\pi_{\ell2}$ Open
In recent years, lattice determinations of non-perturbative quantities such as $f_K$ and $f_\\pi$, which are relevant for $V_{us}$ and $V_{ud}$, have reached an impressive precision of $\\mathcal{O}(1\\%)$ or better. To make further progre…
View article: Lattice dataset for the paper arXiv:2202.08795 "Simulating rare kaon decays using domain wall lattice QCD with physical light quark masses"
Lattice dataset for the paper arXiv:2202.08795 "Simulating rare kaon decays using domain wall lattice QCD with physical light quark masses" Open
Release for https://arxiv.org/abs/2202.08795
View article: Prospects for precise predictions of $a_\mu$ in the Standard Model
Prospects for precise predictions of $a_\mu$ in the Standard Model Open
We discuss the prospects for improving the precision on the hadronic corrections to the anomalous magnetic moment of the muon, and the plans of the Muon $g-2$ Theory Initiative to update the Standard Model prediction.
View article: Near-Physical Point Lattice Calculation of Isospin-Breaking Corrections to $K_{\ell2}/π_{\ell2}$
Near-Physical Point Lattice Calculation of Isospin-Breaking Corrections to $K_{\ell2}/π_{\ell2}$ Open
In recent years, lattice determinations of non-perturbative quantities such as $f_K$ and $f_π$, which are relevant for $V_{us}$ and $V_{ud}$, have reached an impressive precision of $\mathcal{O}(1\%)$ or better. To make further progress, e…
View article: Towards a lattice determination of the form factors of the rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$
Towards a lattice determination of the form factors of the rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$ Open
The rare Hyperon decay $Σ^+ \to p \ell^+ \ell^-$ is an $s \to d$ flavour changing neutral current, and is therefore suppressed in within the Standard Model, making it an excellent probe for new physics. The process is dominated by long dis…
View article: Recent Developments of Muon g-2 from Lattice QCD
Recent Developments of Muon g-2 from Lattice QCD Open
One of the most promising quantities for the search of signatures of physics beyond the Standard Model is the anomalous magnetic moment $g-2$ of the muon, where a comparison of the experimental result with the Standard Model estimate yield…
View article: Recent Developments of Muon g-2 from Lattice QCD
Recent Developments of Muon g-2 from Lattice QCD Open
One of the most promising quantities for the search of signatures of physics beyond the Standard Model is the anomalous magnetic moment $g-2$ of the muon, where a comparison of the experimental result with the Standard Model estimate yield…
View article: Report on the 2019 Lattice Diversity and Inclusivity Survey.
Report on the 2019 Lattice Diversity and Inclusivity Survey. Open
We report on the results of a survey to assess diversity and inclusivity in the Lattice community as one of the duties of a newly formed Committee on Diversity and Inclusivity in the Lattice community.
View article: Isospin breaking corrections to the HVP at the physical point
Isospin breaking corrections to the HVP at the physical point Open
A determination of the hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon from lattice QCD aiming at a precision of $1\%$ requires to include isospin breaking corrections in the computation. We present a…
View article: Calculation of the Hadronic Vacuum Polarization Contribution to the Muon Anomalous Magnetic Moment
Calculation of the Hadronic Vacuum Polarization Contribution to the Muon Anomalous Magnetic Moment Open
We present a first-principles lattice QCD+QED calculation at physical pion mass of the leading-order hadronic vacuum polarization contribution to the muon anomalous magnetic moment. The total contribution of up, down, strange, and charm qu…