20-25 October 2019
PSI
Europe/Zurich timezone

Pseudoscalar contribution to the muon g-2

23 Oct 2019, 15:50
20m
WHGA/001 - Auditorium (PSI)

WHGA/001 - Auditorium

PSI

Oral Session

Speaker

Franziska Hagelstein (Universität Bern)

Description

In their 2004 paper, Melnikov and Vainshtein derive a short-distance constraint for the pseudoscalar-pole light-by-light four-point function. To satisfy this constraint, Melnikov and Vainshtein dropped the pseudoscalar transition form factor at the vertex where the external photon is hooked. We present a way to satisfy the short-distance constraint of Melnikov and Vainshtein with an infinite sum over radially-excited pseudoscalar-pole diagrams (without dropping the singly-virtual transition form factor). For this, we develop a suitable model for the pseudoscalar transition form factor. We compare our result for the pseudoscalar-pole contribution to the muon g-2 with the literature values. In addition, a prediction of the Schwinger sum rule for the pseudoscalar contribution is presented.

Primary author

Franziska Hagelstein (Universität Bern)

Co-authors

Gilberto Colangelo (University of Bern) Laetitia Laub (Universität Bern)

Presentation Materials