2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 16, 695-700
DOI 10.1007/s100520000381

Probing R-parity violation in the production of $t \bar{c}$ $(c \bar{t})$ at lepton colliders

Z.-H. Yu1,3 - H. Pietschmann1 - W.-G. Ma2,3 - L. Han3 - Y. Jiang3

1 Institut für Theoretische Physik, Universität Wien, 1090 Vienna, Austria
2 CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China
3 Department of Modern Physics, University of Science and Technology of China (USTC), Hefei, Anhui 230027, P.R. China

Received: 18 November 1999 / Revised version: 7 January 2000 /
Published online: 26 July 2000 - © Springer-Verlag 2000

Abstract
We studied the process $e^{+}e^{-} \rightarrow
t\bar{c}+c\bar{t}$ in a Rp-violating supersymmetric model with effects from both B- and L-violating interactions. The calculation shows that it is possible to either detect the Rp-violating signal at the Next Linear Collider or get more stringent constraints on the heavy-flavor $\rlap/R_{p}$ couplings. A comparison with results from $\gamma\gamma \rightarrow t\bar{c}+
c\bar{t}$ may allow one to distinguish between B- and L-violating interactions. For very clean background conditions and Rp-violating parameters close to the present limits, the future detection of B-violating interactions should be possible. The process of $\mu ^{+}
\mu ^{-}
\rightarrow t \bar{c}+c\bar{t}$ is also considered.


Copyright Società Italiana di Fisica, Springer-Verlag 2000