The SM prediction of g − 2 of the muon

Hagiwara, K.; Martin, A.D.; Nomura, Daisuke; Teubner, T.

doi:10.1016/b978-0-444-51343-4.50059-4

Proceedings of the 31st International Conference on High Energy Physics Ichep 2002 2003

DOI: 10.1016/b978-0-444-51343-4.50059-4

|View full text |Cite

The SM prediction of g − 2 of the muon

K. Hagiwara¹,

A.D. Martin²,

Daisuke Nomura³

et al.

Abstract: We calculate (g − 2)/2 of the muon, by improving the determination of the hadronic vacuum polarisation contribution, a had,LO µ , and its uncertainties. The different e + e − data sets for each exclusive (and the inclusive) channel are combined in order to obtain the optimum estimate of the cross sections and their uncertainties. QCD sum rules are evaluated in order to resolve an apparent discrepancy between the inclusive data and the sum of the exclusive channels. We conclude a had,LO µ = (683.1 ± 5.9 exp ± 2… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2004

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Isospin violating effects in e+e− vs. τ measurements of the pion form factor |Fπ|2(s)

2004

View full text Add to dashboard Cite

We study possible so far unaccounted isospin breaking effects in the relation between the pion form factor as determined in e + e − experiments and the corresponding quantity obtained after accounting for known isospin breaking effects by an isospin rotation from the τ -decay spectra. In fact the observed 10% discrepancy in the respective pion form factors may be explained by the isospin breaking which is due to the difference between masses and widths of the charged and neutral ρ mesons. Since the hadronic contribution to the muon anomalous magnetic moment can be calculated directly in terms of the e + e − -data the corresponding evaluation seems to be more reliable. Our estimate is a had(1) µ = (694.8 ± 8.6) × 10 −10 . The τ -data are useful at the presently aimed level of accuracy only after appropriate input from theory.

show abstract

Isospin violating effects in e+e− vs. τ measurements of the pion form factor |Fπ|2(s)

2004

View full text Add to dashboard Cite

show abstract

Theoretical precision in estimates of the hadronic contributions to (g − 2)μ and αQED(Mz)

Jegerlehner¹

2004

Nuclear Physics B - Proceedings Supplements

View full text Add to dashboard Cite

I review recent estimates of the non-perturbative hadronic vacuum polarization contributions. Since these at present can only be evaluated in terms of experimental data of limited precision, the related uncertainties pose a serious limitation in our ability to make precise predictions. Besides e + e − -annihilation data also τ decay spectra can help to get better predictions. Here, it is important to account for all possible iso-spin violations in τ -decay spectra, from which e + e − cross sections may be obtained by an iso-spin rotation. The observed 10% discrepancy in the region above the ρ may be understood as a so far unaccounted iso-spin breaking effect.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

The SM prediction of g − 2 of the muon

Cited by 2 publications

References 29 publications

Isospin violating effects in e+e− vs. τ measurements of the pion form factor |Fπ|2(s)

Isospin violating effects in e+e− vs. τ measurements of the pion form factor |Fπ|2(s)

Theoretical precision in estimates of the hadronic contributions to (g − 2)μ and αQED(Mz)

Contact Info

Product

Resources

About