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Test of QED to fourth order by study of four-lepton final states in e+e- interactions at 29 GeV with the Mark II detector.
Authors
G Abrams
D Amidei
+38 more
AR Baden
T Barklow
A Boyarski
J Boyer
PR Burchat
DL Burke
F Butler
JM Dorfan
GJ Feldman
G Gidal
L Gladney
MS Gold
G Goldhaber
J Haggerty
JA Jaros
JA Kadyk
D Karlen
AJ Lankford
RR Larsen
BW LeClaire
ME Levi
NS Lockyer
V Lüth
ME Nelson
RA Ong
ML Perl
M Petradza
B Richter
K Riles
PC Rowson
T Schaad
H Schellman
WB Schmidke
PD Sheldon
R Thun
GH Trilling
DR Wood
JM Yelton
Publication date
1 October 1990
Publisher
eScholarship, University of California
Abstract
We have tested QED to fourth order in the coupling constant in the large-Q2 region by studying four-lepton final states in e+e- interactions with the Mark II detector at the SLAC storage ring PEP (s=29 GeV). All four final-state particles were detected at large angles with respect to the beam axis. For an integrated luminosity of 205 pb-1, we observed ten e+e-e+e-, ten e+e-+-, and one events with opposite-charge pair masses greater than 1 GeV/c2. These events show good agreement with the complete 4 QED calculation. © 1990 The American Physical Society
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Last time updated on 25/12/2021