1.2k citations · 4k across the 24 of their papers we have counts for
22 papers · 1 filter
Isospin-breaking in the scattering amplitude I: Effects due to the pion mass difference
Gilberto Colangelo, Martina Cottini, Jacobo Ruiz de Elvira
This is the first of a series of papers devoted to a detailed analysis of isospin-breaking effects in the scattering amplitude and the vector form factor of the pion. Isospin…
Radiative corrections to
Gilberto Colangelo, Martina Cottini, Martin Hoferichter +1
Hadronic decays present an opportunity to determine the isovector part of the hadronic-vacuum-polarization contribution to the anomalous magnetic moment of the muon in a way co…
Improved calculation of radiative corrections to decays
Gilberto Colangelo, Martina Cottini, Martin Hoferichter +1
A reliable calculation of radiative corrections to decays is an important prerequisite for using hadronic decays for a data-driven evaluation of the hadronic-vacuum…
Kaon Physics: A Cornerstone for Future Discoveries
Jason Aebischer, Atakan Tugberk Akmete, Riccardo Aliberti +153
The kaon physics programme, long heralded as a cutting-edge frontier by the European Strategy for Particle Physics, continues to stand at the intersection of discovery and innovati…
Radiative corrections and Monte Carlo tools for low-energy hadronic cross sections in collisions
Riccardo Aliberti, Paolo Beltrame, Ettore Budassi +32
We present the results of Phase I of an ongoing review of Monte Carlo tools relevant for low-energy hadronic cross sections. This includes a detailed comparison of Monte Carlo code…
Puzzles in the hadronic contributions to the muon anomalous magnetic moment
Gilberto Colangelo, Martin Hoferichter, Peter Stoffer
We summarize recent developments in the Standard-Model evaluation of the anomalous magnetic moment of the muon , both in the hadronic-light-by-light and hadronic-vacuum-polari…
A phenomenological estimate of isospin breaking in hadronic vacuum polarization
Martin Hoferichter, Gilberto Colangelo, Bai-Long Hoid +5
Puzzles in the determination of the hadronic-vacuum-polarization contribution currently impede a conclusive interpretation of the precision measurement of the anomalous magnetic mo…
Chiral extrapolation of hadronic vacuum polarization and isospin-breaking corrections
Martin Hoferichter, Gilberto Colangelo, Bai-Long Hoid +4
By far the biggest contribution to hadronic vacuum polarization (HVP) arises from the two-pion channel. Its quark-mass dependence can be evaluated by combining dispersion relations…
Isospin-breaking effects in the two-pion contribution to hadronic vacuum polarization
Gilberto Colangelo, Martin Hoferichter, Bastian Kubis +1
Isospin-breaking (IB) effects in the two-pion contribution to hadronic vacuum polarization (HVP) can be resonantly enhanced, if related to the interference of the and $ω(7…
A theory vade mecum for PSI experiments
Gilberto Colangelo, Franziska Hagelstein, Adrian Signer +1
This article gives a compact introduction and overview of the theory underlying the experiments described in the rest of this review.
Short-distance constraints for the longitudinal component of the hadronic light-by-light amplitude: an update
Gilberto Colangelo, Franziska Hagelstein, Martin Hoferichter +2
We reassess the impact of short-distance constraints for the longitudinal component of the hadronic light-by-light amplitude on the anomalous magnetic moment of the muon, $a_μ=(g-2…
The anomalous magnetic moment of the muon in the Standard Model
T. Aoyama, N. Asmussen, M. Benayoun +129
We review the present status of the Standard Model calculation of the anomalous magnetic moment of the muon. This is performed in a perturbative expansion in the fine-structure con…
Dispersion relation for hadronic light-by-light scattering: theoretical foundations
Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura +1
In this paper we make a further step towards a dispersive description of the hadronic light-by-light (HLbL) tensor, which should ultimately lead to a data-driven evaluation of its…
Dispersive approach to hadronic light-by-light scattering
Gilberto Colangelo, Martin Hoferichter, Massimiliano Procura +1
Based on dispersion theory, we present a formalism for a model-independent evaluation of the hadronic light-by-light contribution to the anomalous magnetic moment of the muon. In p…
Scalar form factors of light mesons
B. Ananthanarayan, I. Caprini, G. Colangelo +2
The scalar radius of the pion plays an important role in CHPT, because it is related to one of the basic effective coupling constants, viz. the one which controls the quark mass de…
ππscattering
G. Colangelo, J. Gasser, H. Leutwyler
We demonstrate that, together with the available experimental information, chiral symmetry determines the low energy behaviour of the scattering amplitude to within very small…
A note on the dispersive treatment of K -> pi pi with the kaon off-shell
M. Buechler, G. Colangelo, J. Kambor +1
It has been recently suggested that it is possible to calculate the effect of final state interactions in K -> pi pi amplitudes by applying dispersive methods to the amplitude with…
Connections between epsilon'/epsilon and Rare Kaon Decays in Supersymmetry
A. J. Buras, G. Colangelo, G. Isidori +2
We analyze the rare kaon decays , , and in conjunction with the CP violating ratio in a gen…
Renormalization of chiral perturbation theory to order p^6
J. Bijnens, G. Colangelo, G. Ecker
The renormalization of chiral perturbation theory is carried out to next-to-next-to-leading order in the meson sector. We calculate the divergent part of the generating functional…
Pion-pion scattering at low energy
J. Bijnens, G. Colangelo, G. Ecker +2
We present technical details of the evaluation of the elastic pi-pi scattering amplitude to two loops in chiral perturbation theory. In particular, we elaborate on the renormalizat…
On the Pais--Treiman method to measure phase shifts in decays
G. Colangelo, M. Knecht, J. Stern
We evaluate theoretical uncertainties to the method of Pais and Treiman to measure the phase shifts in decays. We find that they are very small, below .
- Decays Beyond One Loop
J. Bijnens, G. Colangelo, J. Gasser
The matrix elements for decays are described by four form factors and . We complete previous calculations by evaluating at next-to-leading order…