Why e{superscript +}e{superscript -} {yields} t tbar is Different Page: 3 of 13
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FERMILAB-Conf-98/212-T
hep-ph/9807573
July 31. 1998
Why e+e- - tt is different"
Stephen Parke
Theoretical Physics Department
Fermi National Accelerator Laboratory
.-I
P.O. Box 500, Batavia. IL 60510 U.S.A.
E-mail: parkc@fnal.gov
Abstract
Unlike other examples of fermion pair production in c+c- collisions, we show that
top-quark pairs are produced in an essentially unique spin configuration in polarized
c+c- colliders at all energies. Since the directions of the electroweak decay products
of polarized top-quarks are strongly correlated to the top-quark spin axis. this unique
spin configuration leads to a distinctive topology for top-quark pair events which can
be used to constrain anomalous couplings to the top-quark. A significant interference
effect between the longitudinal and transverse W-bosons in the decay of polarized top-
quarks is also discussed.
1Dedicated to Sid Drell on the occasion of the "Sid Drell Symposium" held at the Stanford Linear
Accelerator Center. Stanford University. California on July 31. 1998.
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Parke, Stephen. Why e{superscript +}e{superscript -} {yields} t tbar is Different, article, February 18, 1999; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc679269/m1/3/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.