Lifetime Difference in B_s mixing: Standard Model and beyond
Andriy Badin, Fabrizio Gabbiani, Alexey A. Petrov
TL;DR
This paper calculates higher-order corrections to B_s meson lifetime differences within the Standard Model and explores potential impacts of new physics contributions, providing refined theoretical predictions.
Contribution
It introduces 1/m_b^2 corrections to mma_s calculations and analyzes generic elta B=1 New Physics effects on mma_s.
Findings
1/m_b^2 corrections are small but significant for mma_s
Provides refined theoretical estimates including non-perturbative effects
Analyzes potential new physics contributions to mma_s
Abstract
We present a calculation of 1/m^2_b corrections to the lifetime differences of B_s mesons \Delta \Gamma_s in the heavy-quark expansion. We find that they are small to significantly affect \Delta \Gamma_s and present the result for lifetime difference including non-perturbative 1/m_b and 1/m_b^2 corrections. We also analyze the generic \Delta B = 1 New Physics contributions to \Delta \Gamma_s and provide several examples.
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