Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-07-21
Z. Phys. C61 (1994) 239-246
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages (revtex), 11 figures not included (available on request) ; ITP-SU-93/03, TMU-HEL-9307
Scientific paper
10.1007/BF01413101
In the framework of the minimal supersymmetric standard model (MSSM) and the R-parity breaking model (RBM), we investigate production processes of the scalar top (stop) at HERA energies. These models are characterized by the possible existence of the light stop whose mass is lighter than those of the top quark and the other squarks. It is shown that in the MSSM the stop pair production via boson-gluon fusion gives a sizeable cross section and the most serious background $ep\rightarrow ec\bar{c}X$ could be suppressed by appropriate kinematical cuts. We also show that in the RBM the stop is singly produced in the neutral current processes and we have a clear signal as a sharp peak in the Bjorken parameter $x$ distribution of the scattered electron.
Adachi Shunji
Kitamura Shoichi
Kobayashi Tetsuro
Kon Tadashi
Nakamura Keiichiro
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