Publications (46)
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…
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…
Searching for K_L -> pi^0 nu nubar at a Phi-factory
F. Bossi, G. Colangelo, G. Isidori
The perspectives of a search for the rare decay at a Phi-factory are discussed. After a general analysis, we focus on the realistic case of KLOE and DAFNE, sho…
The pi pi S-wave scattering lengths
G. Colangelo, J. Gasser, H. Leutwyler
We match the known chiral perturbation theory representation of the pi pi scattering amplitude to two loops with a phenomenological description that relies on the Roy equations. On…
Dispersion relations and soft pion theorems for K -> pi pi
M. Buechler, G. Colangelo, J. Kambor +1
We propose a new method to obtain the K -> pi pi amplitude from K -> pi which allows one to fully account for the effects of final state interactions. The method is based on a set…
Quenched Chiral Perturbation Theory to one loop
G. Colangelo, E. Pallante
The divergences of the generating functional of quenched Chiral Perturbation theory (qCHPT) to one loop are computed in closed form. We show how the quenched chiral logarithms can…
Prospects for precise predictions of in the Standard Model
G. Colangelo, M. Davier, A. X. El-Khadra +79
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 Theory Initiative to…
Real-time shot-noise-limited differential photodetection for atomic quantum control
F. Martin Ciurana, G. Colangelo, Robert J. Sewell +1
We demonstrate high-efficiency, shot-noise-limited differential photodetection with real-time signal conditioning, suitable for feedback-based quantum control of atomic systems. Th…
Double Chiral Logs
J. Bijnens, G. Colangelo, G. Ecker
We determine the full structure of the leading (double-pole) divergences of O(p^6) in the meson sector of chiral perturbation theory. The field theoretic basis for this calculation…
MesonNet 2013 International Workshop. Mini-proceedings
M. J. Amaryan, M. Bashkanov, M. Benayoun +54
The mini-proceedings of the MesonNet 2013 International Workshop held in Prague from June 17th to 19th, 2013, are presented. MesonNet is a research network within EU HadronPhysics3…
Workshop summary -- Kaons@CERN 2023
G. Anzivino, S. Arguedas Cuendis, V. Bernard +60
Kaon physics is at a turning point -- while the rare-kaon experiments NA62 and KOTO are in full swing, the end of their lifetime is approaching and the future experimental landscap…
Opportunities in Flavour Physics at the HL-LHC and HE-LHC
A. Cerri, V. V. Gligorov, S. Malvezzi +300
Motivated by the success of the flavour physics programme carried out over the last decade at the Large Hadron Collider (LHC), we characterize in detail the physics potential of it…
Tau Decays and Chiral Perturbation Theory
G. Colangelo, M. Finkemeier, R. Urech
In a small window of phase space, chiral perturbation theory can be used to make standard model predictions for tau decays into two and three pions. For , we give t…
The quark condensate from K_{e_4} decays
G. Colangelo, J. Gasser, H. Leutwyler
We show that, independently of the size of the quark condensate, chiral symmetry correlates the two S-wave ÏÏscattering lengths. In view of this constraint, the new precision dat…
Mini-Proceedings of the STRONG2020 Virtual Workshop on "Space-like and Time-like determination of the Hadronic Leading Order contribution to the Muon "
G. Abbiendi, A. Arbuzov, Sw. Banerjee +31
The mini-proceedings of the STRONG2020 Virtual Workshop "Space-like and Time-like determination of the Hadronic Leading Order contribution to the Muon ", November 24--26 2021,…
Finite size effects on in QCD from Chiral Perturbation Theory
G. Colangelo, S. Dürr, R. Sommer
We present a determination of the shift due to the finite spatial box size by means of Chiral Perturbation Theory and Lüscher's formula. The range of ap…
The Vector and Scalar Form Factors of the Pion to Two Loops
J. Bijnens, G. Colangelo, P. Talavera
We calculate the vector and scalar form factors of the pion to two loops in Chiral Perturbation Theory. We estimate the unknown O(p^6) constants using resonance exchange. We make a…
Elastic scattering to two loops
J. Bijnens, G. Colangelo, G. Ecker +2
We evaluate analytically the elastic scattering amplitude to two loops in chiral perturbation theory and give numerical values for the two --wave scattering lengths and f…
Feedback-cooling of an atomic spin ensemble
N. Behbood, M. Napolitano, G. Colangelo +4
We describe a measurement-and-feedback technique to deterministically prepare low-entropy states of atomic spin ensembles. Using quantum non-demolition measurement and incoherent o…
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…
Entanglement-enhanced radio-frequency field detection and waveform sensing
F. Martin Ciurana, G. Colangelo, L. Slodicka +2
We demonstrate a new technique for detecting components of arbitrarily-shaped radio-frequency waveforms based on stroboscopic back-action evading measurements. We combine quantum n…
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 $ε'/΅
Review of lattice results concerning low-energy particle physics
S. Aoki, Y. Aoki, D. Becirevic +29
We review lattice results related to pion, kaon, D- and B-meson physics with the aim of making them easily accessible to the particle physics community. More specifically, we repor…
ÏÏscattering
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 sma…
HadAtom05, Workshop on Hadronic Atoms
L. Afanasyev, G. Colangelo, J. Schacher
These are the proceedings of the workshop "HadAtom05", held at the University of Bern, Switzerland, February 15 and 16, 2005. The main topics of the workshop concerned the physics…
Roy equation analysis of pi pi scattering
B. Ananthanarayan, G. Colangelo, J. Gasser +1
We analyze the Roy equations for the lowest partial waves of elastic pi pi scattering and demonstrate that the two S-wave scattering lengths a_0^0 and a_0^2 are the essential param…
The Belle II Physics Book
E. Kou, P. Urquijo, W. Altmannshofer +524
We present the physics program of the Belle II experiment, located on the intensity frontier SuperKEKB collider. Belle II collected its first collisions in 2018, and is ex…
The CKM Matrix and the Unitarity Triangle
M. Battaglia, A. J. Buras, P. Gambino +37
This report contains the results of the Workshop on the CKM Unitarity Triangle, held at CERN on 13-16 February 2002 to study the determination of the CKM matrix from the available…
Workshop on Pion-Kaon Interactions (PKI2018) Mini-Proceedings. Editors: M. Amaryan, Ulf-G. MeiÃner, C. Meyer, J. Ritman, and I. Strakovsky
M. Amaryan, M. Baalouch, G. Colangelo +21
This volume is a short summary of talks given at the PKI2018 Workshop organized to discuss current status and future prospects of pi-K interactions. The precise data on pi-K intera…
Entanglement-enhanced phase estimation without prior phase information
G. Colangelo, F. Martin Ciurana, G. Puentes +2
We study the generation of planar quantum squeezed (PQS) states by quantum non-demolition (QND) measurement of a cold ensemble of Rb atoms. Precise calibration of the QND me…
MesonNet 2014 International Workshop. Mini-proceedings
P. Adlarson, M. Bashkanov, J. Bijnens +43
The MesonNet International Workshop was held in the Laboratori Nazionali di Frascati from September the 29th to October the 1st, 2014, being the concluding meeting of the MesonNet…
Report of the Working Group on Goldstone Boson Production and Decay
J. Bijnens, G. Colangelo, G. D'Ambrosio +11
This is the summary of the working group on Goldstone Boson Production and Decay of the Chiral Dynamics Workshop in Mainz, September 1-5, 1997. For the production aspects we discus…
The anomalous magnetic moment of the muon in the Standard Model: an update
R. Aliberti, T. Aoyama, E. Balzani +232
We present the current Standard Model (SM) prediction for the muon anomalous magnetic moment, , updating the first White Paper (WP20) [1]. The pure QED and electroweak contri…
Data-driven evaluations of Euclidean windows to scrutinize hadronic vacuum polarization
G. Colangelo, A. X. El-Khadra, M. Hoferichter +4
In this paper, we discuss how windows in Euclidean time can be used to isolate the origin of potential conflicts between evaluations of the hadronic-vacuum-polarization (HVP) contr…
Generation of macroscopic singlet states in a cold atomic ensemble
N. Behbood, F. Martin Ciurana, G. Colangelo +4
We report the generation of a macroscopic singlet state in a cold atomic sample via quantum non-demolition (QND) measurement induced spin squeezing. We observe 3 dB of spin squeezi…
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…
- 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 or…
FLAG Review 2021
Y. Aoki, T. Blum, G. Colangelo +34
We review lattice results related to pion, kaon, -meson, -meson, and nucleon physics with the aim of making them easily accessible to the nuclear and particle physics communi…
Certified quantum non-demolition measurement of a macroscopic material system
R. J. Sewell, M. Napolitano, N. Behbood +2
Quantum non-demolition (QND) measurements improve sensitivity by evading measurement back-action. The technique was first proposed to detect mechanical oscillations in gravity wave…
FLAG Review 2019
S. Aoki, Y. Aoki, D. Becirevic +32
We review lattice results related to pion, kaon, -meson, -meson, and nucleon physics with the aim of making them easily accessible to the nuclear and particle physics communi…
On the precision of the theoretical predictions for pi pi scattering
I. Caprini, G. Colangelo, J. Gasser +1
In a recent paper, Pelaez and Yndurain evaluate some of the low energy observables of pi pi scattering and obtain flat disagreement with our earlier results. The authors work with…
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 .
Supersymmetric contributions to direct CP violation in K -> pi pi gamma decays
G. Colangelo, G. Isidori, J. Portoles
We analyze the supersymmetric contributions to direct-CP-violating observables in decays induced by gluino-mediated magnetic-penguin operators. We find that $\epsp_{…
Ultrasensitive Atomic Spin Measurements with a Nonlinear Interferometer
R. J. Sewell, M. Napolitano, N. Behbood +3
We study nonlinear interferometry applied to a measurement of atomic spin and demonstrate a sensitivity that cannot be achieved by any linear-optical measurement with the same expe…
Semileptonic Kaon Decays
J. Bijnens, G. Colangelo, G. Ecker +1
We present the matrix elements for the semileptonic kaon decays , , ,, and at next-to-leading order, and $K_{e5…
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…