The second order QCD contribution to the semileptonic b -> u decay rate
T. van Ritbergen (Karlsruhe U.)
TL;DR
This paper analytically computes the second order QCD correction to the inclusive semileptonic decay rate of a b quark into u quarks, enhancing theoretical precision in particle physics.
Contribution
It provides the first analytical calculation of the alpha_s^2 contribution to the b -> u decay width at zero u quark mass, advancing theoretical understanding.
Findings
Analytical expression for second order QCD correction derived.
Improved theoretical accuracy for b -> u decay rate.
Supports precise tests of the Standard Model.
Abstract
The order alpha_s^2 contribution to the inclusive semileptonic decay width of a b quark \Gamma(b -> X_u e \bar{\nu}_e) is calculated analytically for zero mass u quarks.
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