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

Z.-H. Yu; H. Pietschmann; W.-G. Ma; L. Han; Y. Jiang

doi:doi:10.1007/s100520000381

2022 Impact factor 4.4

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. Yu^1,3 - H. Pietschmann¹ - W.-G. Ma^2,3 - 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 R_p-violating supersymmetric model with effects from both B- and L-violating interactions. The calculation shows that it is possible to either detect the R_p-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 R_p-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.