TL;DR
This paper reviews how measurements of single top-quark production and decay branching ratios can determine the CKM matrix element V_tb without assuming unitarity, providing insights into quark flavor physics.
Contribution
It discusses the current experimental methods and future prospects for measuring V_tb directly through top-quark processes at hadron colliders.
Findings
Current measurements constrain V_tb with certain uncertainties.
Future collider data could improve the precision of V_tb determination.
The approach allows testing the Standard Model assumptions about quark mixing.
Abstract
The measurement of the single top-quark production cross section in hadron collisions at the Tevatron and the LHC can be used to determine the absolute value of the CKM matrix element V_tb without assuming the unitarity of the CKM matrix. By measuring the branching ratio of the decay t -> W + b one can relate V_tb to the matrix elements V_ts and V_td. The current experimental status and future prospects of these measurements are reviewed.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research