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On the amplitudes for the CP-conserving K ± ( K S ) → π ± ( π 0 ) ℓ + ℓ − rare decay modes
/ D’Ambrosio, Giancarlo ; Greynat, David ; Knecht, Marc
The amplitudes for the rare decay modes K ± → π ± ℓ + ℓ − and K S → π 0 ℓ + ℓ − are studied with the aim of obtaining predictions for them, such as to enable the possibility to search for violations of lepton-flavour universality in the kaon sector. [...]
Published in JHEP 1902 (2019) 049
10.1007/JHEP02(2019)049
arXiv:1812.00735
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Mellin-Barnes approach to hadronic vacuum polarization and
/ Charles, Jérôme ; de Rafael, Eduardo ; Greynat, David
It is shown that with a precise determination of a few derivatives of the hadronic vacuum polarization (HVP) self-energy function at , from lattice QCD (LQCD) or from a dedicated low-energy experiment, one can obtain an evaluation of the lowest order HVP contribution to the anomalous magnetic moment of the muon with an accuracy comparable to the one reached using the annihilation cross section into hadrons. [...]
Published in Physical Review D 97 (2018)
10.1103/PhysRevD.97.076014
arXiv:1712.02202
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Assuming Regge trajectories in holographic QCD: from OPE to chiral perturbation theory
/ Cappiello, Luigi ; D’Ambrosio, Giancarlo ; Greynat, David
The soft wall model in holographic QCD has Regge trajectories but wrong operator product expansion (OPE) for the two-point vectorial QCD Green function. [...]
Published in EPJC 75 (2015) 465
10.1140/epjc/s10052-015-3686-0
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Asymptotic behaviour of pion-pion total cross-sections
/ David Greynat ; Eduardo de Rafael ; Grégory Vulvert
We derive a sum rule which shows that the Froissart-Martin bound for the asymptotic behaviour of the ππ total cross sections at high energies, if modulated by the Lukaszuk-Martin coefficient of the leading log 2 s behaviour, cannot be an optimal bound in QCD. [...]
Published in JHEP 1403 (2014) 107
10.1007/JHEP03(2014)107
arXiv:1312.2881
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