Probing the flavor of the top quark decay

摘要

The top quark sector is almost decoupled from lighter quark generations due to the fact that V_(tb) ≈ 1. The current experimental measurements of V_(tb) are compatible with the Standard Model expectations but are still dominated by experimental uncertainties. In this paper, a revision of the experimental methods used to measure V_(tb) is given, and a simple method to probe heavy flavor content fraction of top quark events, R = B(t→Wb)/B(t→Wq), is presented and discussed. Prospects for the measurements at the Large Hadron Collider based on generator level simulations are outlined.