Using single top rapidity to measure V_td, V_ts, V_tb at hadron colliders

Understand

Single top production processes are usually regarded as the ones in which V_tb can be directly measured at hadron colliders.

• We show that the analysis of the single top rapidity distribution in t-channel and tW production can also set direct limits on V_td.
• At LHC with 10 fb^-1 at 14 TeV the combined limits on V_td may be reduced by almost a factor of two when the top rapidity distribution is used.
• This also implies that the limits on V_tb can also be reduced by 15%, since both parameters as well as V_ts must be simultaneously obtained from a global fit to data.