Document type
ArticleVersion
Published versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/140438
Mass of the ηb and αs from the Nonrelativistic Renormalization Group
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
Abstract
We sum up the next-to-leading logarithmic corrections to the heavy-quarkonium hyperfine splitting, using the nonrelativistic renormalization group. On the basis of this result, we predict the mass of the η b meson to be M ( η b ) = 9421 ± 11 ( th ) + 9 − 8 ( δ α s ) MeV . The experimental measurement of M ( η b ) with a few MeV error would be sufficient to determine α s ( M Z ) with an accuracy of ± 0.003 . For the hyperfine splitting in charmonium, the use of the nonrelativistic renormalization group brings the perturbative prediction significantly closer to the experimental figure.
Subject
Subject (English)
Citation
Citation
KNIEHL, Bernd A., et al. Mass of the ηb and αs from the Nonrelativistic Renormalization Group. Physical Review Letters. 2004. Vol. 92, num. 24, pags. 242001. ISSN 0031-9007. [consulted: 17 of June of 2026]. Available at: https://hdl.handle.net/2445/140438