TY - JOUR
T1 - Scalar top production in e+e- annihilation
AU - Drees, Manuel
AU - Hikasa, Ken Ichi
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1990/12/6
Y1 - 1990/12/6
N2 - We discuss the pair production of light scalar top quarks in e+e- annihilation. The lighter mass eigenstate t̃1 is a mixture of SU(2) doublet and singlet t̃ states and can have a vanishing coupling to the Z boson. We show that the present data on the total decay width of the Z0 can put a bound on the t̃1 mass for some values of the mixing angle, but even existing dedicated search for squarks leaves a large portion of the parameter space unconstrained. We include both initial-state QED and final-state QCD corrections in our results for the cross section; even quite far away from the threshold the total corrections can lie between -15% and +70%.
AB - We discuss the pair production of light scalar top quarks in e+e- annihilation. The lighter mass eigenstate t̃1 is a mixture of SU(2) doublet and singlet t̃ states and can have a vanishing coupling to the Z boson. We show that the present data on the total decay width of the Z0 can put a bound on the t̃1 mass for some values of the mixing angle, but even existing dedicated search for squarks leaves a large portion of the parameter space unconstrained. We include both initial-state QED and final-state QCD corrections in our results for the cross section; even quite far away from the threshold the total corrections can lie between -15% and +70%.
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U2 - 10.1016/0370-2693(90)91094-R
DO - 10.1016/0370-2693(90)91094-R
M3 - Article
AN - SCOPUS:0000006839
SN - 0370-2693
VL - 252
SP - 127
EP - 134
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1
ER -