scispace - formally typeset
Open AccessJournal ArticleDOI

Precision measurements of σhadronic for αeff(E) at ILC energies and (g−2)μ

F. Jegerlehner
- Vol. 162, pp 22-32
Reads0
Chats0
TLDR
In this paper, the authors introduce the concept of constant α(E), which is the non-perturbative hadronic contribution to charge screening by vacuum polarization (VP) which limits its precision.
Abstract
1. INTRODUCTIONOf all non-perturbative hadronic effects enter-ing the predictions of a host of electroweak pre-cision observables, the main effect enters via theeffective fine-structure “constant” α(E) [1,2]. Itis the non-perturbative hadronic contribution tocharge screening by vacuum polarization (VP)which limits its precision. The value of α(E)is of interest for a wide range of energies, wellknown examples are α(M

read more

Content maybe subject to copyright    Report

Citations
More filters
Journal ArticleDOI

The muon g ― 2

TL;DR: In this article, the authors present a review of the status of the theoretical prediction and in particular discuss the role of the hadronic vacuum polarization effects and hadronic light-by-light scattering correction, including a new evaluation of the dominant pion exchange contribution.
Journal ArticleDOI

Muon g − 2 and α ( M Z 2 ) : A new data-based analysis

TL;DR: In this paper, the authors presented a complete reevaluation of the hadronic vacuum polarization contributions to the anomalous magnetic moment of the muon, aμhad,VP, and Δαhad(MZ2), from the combination of e+e-→hadrons cross section data.
Journal ArticleDOI

g − 2 of charged leptons, α ( M Z 2 ) , and the hyperfine splitting of muonium

TL;DR: In this paper, the authors presented reevaluations of the hadronic vacuum polarization contributions to the anomalous magnetic moments of the electron, muon and tau lepton, to the ground-state hyperfine splitting of muonium and also to the running of the QED coupling at the mass scale of the Z$ boson.
Journal ArticleDOI

Physics with the KLOE-2 experiment at the upgraded DA Phi NE

G. Amelino-Camelia, +101 more
TL;DR: In this paper, the authors discuss the recent theoretical development and experimental progress in kaon physics relevant for the Standard Model tests in the flavor sector, the sensitivity we can reach in probing CPT and Quantum Mechanics from time evolution of entangled-kaon states, the interest for improving on the present measurements of non-leptonic and radiative decays of kaons and eta/eta' mesons, and contribution to understand the nature of light scalar mesons.
Journal ArticleDOI

Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data

S. Actis, +60 more
TL;DR: In this paper, the authors present the achievements of the last years of the experimental and theoretical groups working on hadronic cross section measurements at the low energy e+e- colliders in Beijing, Frascati, Ithaca, Novosibirsk, Stanford and Tsukuba and sketch the prospects in these fields for the years to come.
References
More filters
Journal ArticleDOI

Review of Particle Physics (2006)

W-M. Yao, +168 more
- 01 Jan 2006 - 
TL;DR: In this article, the authors present a review of the Particle Data Group (PDG) and its role in the development of particle data and its application in particle physics. But the review is limited.
Journal ArticleDOI

The O (αS3) corrections to σtot (e+e− → hadrons) and Γ (τ− → ντ + hadrons) in QCD

TL;DR: In this article, the authors presented the results of the total analytical reevaluation of the massless next-next-to-leading αs3 QCD correction to R(s) = σtot(e+e−→γ→hadrons)/σ(e−e −→μ+μ−).
Journal ArticleDOI

Total hadronic cross section in e+e- annihilation at the four-loop level of perturbative QCD.

TL;DR: A new result for the four-loop {beta} function in QED is obtained and it differs from a previous calculation and is much smaller.
Journal ArticleDOI

Hadronic contributions to ( g-2) of the leptons and to the effective fine structure constant α( M { Z / 2 })

TL;DR: In this paper, an updated analysis of the hadronic vacuum polarization using all presently available e+e− data was presented, where contributions from different energy ranges were presented separately for the muon and the τ-lepton and for α(MZ2).
Journal ArticleDOI

Confronting Spectral Functions from e+e- Annihilation and tau Decays: Consequences for the Muon Magnetic Moment

TL;DR: In this paper, a complete reevaluation of all exclusive cross sections, taking into account the most recent data that became available in particular from the Novosibirsk experiments and applying corrections for the missing radiative corrections.
Related Papers (5)

Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data

S. Actis, +60 more