Volume 83, Number 6, September 2008
Article Number 61001
Number of page(s) 6
Section The Physics of Elementary Particles and Fields
Published online 08 September 2008
EPL, 83 (2008) 61001
DOI: 10.1209/0295-5075/83/61001

Single charged top-pion production at next generation $\mth{\gamma\gamma}$ colliders

Yao-Bei Liu1 and Lin-Lin Du2

1   Henan Institute of Science and Technology - Xinxiang 453003, PRC
2   College of Physics and Information Engineering, Henan Normal University - Xinxiang 453007, PRC

received 28 May 2008; accepted in final form 25 July 2008; published September 2008
published online 8 September 2008

In the context of the top-color assisted technicolor (TC2) model, we study the single charged top-pion production process $\gamma\gamma\rightarrow t\bar{b}\Pi_{t}^{-} $. The results show that the production rates can reach the level of tens fb with reasonable parameter values. So one can expect that enough signals could be produced in future high-energy linear collider experiments. Furthermore, the flavor-changing (FC) decay mode $\Pi_{t}^{-}\rightarrow b\bar{c} $ is the best channel to detect the charged top pion due to the clean SM background. With a large number of events and the clean background, the charged top pion should be observable at future linear colliders operating in $\gamma \gamma $ mode at the TeV energy scale.

12.60.Nz - Technicolor models.
14.80.Mz - Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.).
14.65.Ha - Top quarks.

© EPLA 2008