QCD corrections at subleading power for inclusive nonleptonic b→ c u d decays

2024/08/13 by Thomas Mannel, Mannel, Thomas, Daniel Moreno +3
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Computational Physics and Python Applications

paper · pdf · doi:10.48550/arxiv.2408.06767

Abstract

In this paper we compute the NLO QCD corrections for the inclusive nonleptonic decay rates of B-hadrons at subleading power of the heavy quark expansion. In particular, we discuss the coefficient of the chromomagnetic moment parameter μ_G which has a large uncertainty at leading order due to its dependence on the renormalization scale. We find that the renormalization-scale dependence of this coefficient is significantly reduced, thereby reducing the theoretical uncertainty of the coefficient and consequently of the rates. The sign of the coefficient becomes stable, and we estimate that the NLO corrections will increase the decay rates by around 2%.

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