$B_s^0\to D_s^{-}{a}_1^{+}$ decay channel in the $B_s^0$-mixing studies

Abstract

The usefulness of the $B_s^0\to D_s^{-}{a}_1^{+},D_s^{-}\to \varphi {\pi }^{-}\to K^{+}{K}^{-}{\pi }^{-},a_1^{+}\to {\rho }^0{\pi }^{+}\to {\pi }^{+}{\pi }^{-}{\pi }^{+}$ decay chain is investigated for the $B_s$-reconstruction in the future ATLAS $B_s$-mixing experiment. It is shown that this decay channel is almost as suitable for this purpose as previously studied $B_s^0\to D_s^{-}{\pi }^{+}$.

Comments: 17 pages, LaTeX, 6 uuencoded figures appended