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Publikováno v:
EPJ Web of Conferences, Vol 234, p 01006 (2020)
The 3π-channel contribution to hadronic vacuum polarization (HVP) in the anomalous magnetic moment of the muon (g−2)µ is examined based on a dispersive representation of the γ* → 3π amplitude. This decay amplitude is reconstructed from disper
Autor:
Christophe Royon
Publikováno v:
EPJ Web of Conferences, Vol 235, p 06001 (2020)
In this report, we describe the most recent results on exclusive diffraction from the ATLAS, CMS, LHCb, TOTEM experiments at the LHC concerning exclusive pions, J/Ψ, Ψ(2S ), dilepton, diphoton, WW productions and prospects concerning the search for
Publikováno v:
EPJ Web of Conferences, Vol 234, p 01013 (2020)
Procura, Massimiliano; Colangelo, Gilberto; Hoferichter, Martin; Stoffer, Peter (27 April 2020). Dispersion relations for hadronic light-by-light and the muon g − 2. EPJ web of conferences, 234, 01013. EDP Sciences 10.1051/epjconf/202023401013
Procura, Massimiliano; Colangelo, Gilberto; Hoferichter, Martin; Stoffer, Peter (27 April 2020). Dispersion relations for hadronic light-by-light and the muon g − 2. EPJ web of conferences, 234, 01013. EDP Sciences 10.1051/epjconf/202023401013
The largest uncertainties in the Standard Model calculation of the anomalous magnetic moment of the muon (g−2)µ come from hadronic effects, namely hadronic vacuum polarization (HVP) and hadronic lightby-light (HLbL) contributions. Especially the l
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7039df075c6feea521796a6f8a45c887
https://doi.org/10.1051/epjconf/202023401013
https://doi.org/10.1051/epjconf/202023401013
Publikováno v:
EPJ Web of Conferences, Vol 199, p 02023 (2019)
By application of the pion electromagnetic form factor and also the P-wave isovector ππ scattering phase shift parametrizations, following from the first principles, like unitarity and analyticity, for a description of the corresponding accurate da
Publikováno v:
EPJ Web of Conferences, Vol 212, p 04013 (2019)
The pion transition form factor is an important input to the dispersive approaches of the Standard Model calculations for the anomalous magnetic moment of the muon. We report the prospects of a first measurement at high momentum transfer in the time-
Publikováno v:
EPJ Web of Conferences, Vol 212, p 04010 (2019)
An extension of the well known ee → 4l event generator of F. A. Berends, P. H. Daverveldt, and R. Kleiss is presented. This extension accounts for production of narrow resonances, as well as the initial state radiation. In addition, it allows one t
Autor:
Avraham Gal
Publikováno v:
EPJ Web of Conferences, Vol 199, p 02018 (2019)
The structure and width of the recently established d*(2380) resonance are discussed, confronting the consequences of a Pion Assisted Dibaryons hadronic model with those of quark motivated calculations. In particular, the small width $\Gamma_{d\ast}\
Autor:
Tomáš Husek
Publikováno v:
EPJ Web of Conferences, Vol 199, p 02015 (2019)
We briefly summarize current experimental and theoretical results on the two important processes of the low-energy hadron physics involving neutral pions: the Dalitz decay of π0 and the rare decay π0 → e+e−. As novel results we present the comp
Autor:
Huey-Wen Lin
Publikováno v:
EPJ Web of Conferences, Vol 206, p 01003 (2019)
Recently, there have been rapid developments in lattice-QCD calculations of proton structure, especially in the parton distribution functions (PDFs). We overcame a longstanding obstacle and for the first time in lattice-QCD are able to directly calcu
Autor:
Mikhail Gorchtein
Publikováno v:
EPJ Web of Conferences, Vol 199, p 02002 (2019)
We report an update of the isobar model EtaMAID. A new approach is proposed to avoid double counting in the overlap region of Regge and resonances. Dispersion relation is applied on top of the isobar model, and both models describe the data equally w