MEASUREMENT OF THE RUNNING OF EFFECTIVE QED COUPLING AT LARGE MOMENTUM-TRANSFER IN THE SPACELIKE REGION

Authors
ODAKA S ABE K AMAKO K ARAI Y ASANO Y CHIBA M CHIBA Y DAIGO M FUKAWA M FUKUSHIMA Y HABA J HAMASAKI H HEMMI Y HIGUCHI M HIROSE T HOMMA Y ISHIHARA N IWATA Y KANZAKI J KIKUCHI R KONDO T KORHONEN TT KURASHIGE H MATSUDA EK MATSUI T MIYAKE K MORI S NAGASHIMA Y NAKAGAWA Y NAKAMURA T NAKANO I OGAWA K OHAMA T OHSUGI T OHYAMA H OKABE K OKAMOTO A ONO A PENNANEN J SAKAMOTO H SAKUDA M SATO M SATO N SHIODEN M SHIRAI J SUMIYOSHI T TAKADA Y TAKASAKI F TAKITA M TAMURA N TOBIMATSU K TSUBOYAMA T UEHARA S UNNO Y WATANABE T WATASE Y YABUKI F YAMADA Y YAMAGATA T YONEZAWA Y YOSHIDA H
Citation
S. Odaka et al., MEASUREMENT OF THE RUNNING OF EFFECTIVE QED COUPLING AT LARGE MOMENTUM-TRANSFER IN THE SPACELIKE REGION, Physical review letters, 81(12), 1998, pp. 2428-2431
Citations number
21
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
12
Year of publication
1998
Pages
2428 - 2431
Database
ISI
SICI code
0031-9007(1998)81:12<2428:MOTROE>2.0.ZU;2-6
Abstract
The q(2) running of effective QED coupling alpha(q(2)) is measured in a spacelike region, (10 GeV)(2) less than or equal to -q(2) less than or equal to (54 GeV)(2), using Bhabha-scattering and muon-pair product ion data at e(+)e(-) collisions with a center-of-mass energy of 57.77 GeV. The result verifies the prediction of a theoretical estimation wi th a precision of better than 1% in terms of alpha(q(2))/alpha(t(0)) w ith t(0) = -(10 GeV)(2).