Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Greynat David"'
Autor:
Greynat, David, de Rafael, Eduardo
The hadronic vacuum polarization contribution to the anomalous magnetic moment of a lepton is considered as a function of the lepton mass. We show how the analyticity properties of this function allow for its full reconstruction when it is only known
Externí odkaz:
http://arxiv.org/abs/2311.11597
Autor:
Greynat, David, de Rafael, Eduardo
We propose a new set of model independent approximants adapted to the time momentum representation (TMR) of hadronic vacuum polarization (HVP) and its contribution to $g_{\mu}-2$. They provide a way to extrapolate lattice QCD (LQCD) results obtained
Externí odkaz:
http://arxiv.org/abs/2302.01692
Autor:
Greynat, David, de Rafael, Eduardo
The MUonE proposal at the CERN SPS consists in extracting the value of the hadronic vacuum polarization self-energy function (HVP) from its contribution to the differential cross-section of elastic muon-electron scattering. The HVP contribution to th
Externí odkaz:
http://arxiv.org/abs/2202.10810
Publikováno v:
EPJ Web of Conferences, Vol 129, p 00043 (2016)
The soft wall model in holographic QCD has Regge trajectories but wrong operator product expansion (OPE) for the two-point vectorial QCD Green function. We modify the dilaton potential to comply with the OPE. We study also the axial two-point functio
Externí odkaz:
https://doaj.org/article/c301ce190aa641d4b3ab63e7a7a3c035
Autor:
Greynat David
Publikováno v:
EPJ Web of Conferences, Vol 118, p 01013 (2016)
The hadronic contributions to the anomalous magnetic moment of the muon which are relevant for the confrontation between theory and experiment at the present level of accuracy, are evaluated within the same framework: the constituent chiral quark mod
Externí odkaz:
https://doaj.org/article/de5895f0e47048b786698ab9baed7a59
Publikováno v:
Phys. Rev. D 102, 016009 (2020)
Despite recent developments, there are a number of conceptual issues on the hadronic light-by-light (HLbL) contribution to the muon $(g-2)$ which remain unresolved. One of the most controversial ones is the precise way in which short-distance constra
Externí odkaz:
http://arxiv.org/abs/1912.02779
Publikováno v:
Phys. Lett. B 797 (2019) 134891
At order ${\mathcal O}(\alpha G_{\mathrm F})$, the amplitudes for the decays $K\to\pi \ell^+\ell^-$ involve a form factor given by the matrix element of the time-ordered product of the electromagnetic current with the four-quark operators describing
Externí odkaz:
http://arxiv.org/abs/1906.03046
The amplitudes for the rare decay modes $K^\pm\to\pi^\pm\ell^+\ell^-$ and $K_S\to\pi^0\ell^+\ell^-$ are studied with the aim of obtaining predictions for them, such as to enable the possibility to search for violations of lepton-flavour universality
Externí odkaz:
http://arxiv.org/abs/1812.00735
Publikováno v:
Phys. Rev. D 97, 076014 (2018)
It is shown that with a precise determination of a few derivatives of the hadronic vacuum polarization (HVP) self-energy function $\Pi(Q^2)$ at $Q^2=0$, from lattice QCD (LQCD) or from a dedicated low-energy experiment, one can obtain an evaluation o
Externí odkaz:
http://arxiv.org/abs/1712.02202
The soft wall model in holographic QCD has Regge trajectories but wrong operator product expansion (OPE) for the two-point vectorial QCD Green function. We modify the dilaton potential to comply OPE. We study also the axial two-point function using t
Externí odkaz:
http://arxiv.org/abs/1505.01000