Correlator of heavy-light quark currents in HQET in the large $\beta_0$ limit
Andrey G. Grozin
TL;DR
This paper calculates the perturbative correlator of heavy-light quark currents in HQET at leading order in 1/β₀, analyzing renormalon poles in Borel images.
Contribution
It provides the first calculation of the correlator expanded in light-quark masses up to quadratic terms at leading 1/β₀ order.
Findings
Identifies ultraviolet and infrared renormalon poles in Borel images.
Analyzes the structure of Wilson coefficients in HQET.
Provides insights into perturbative contributions in heavy-light systems.
Abstract
The perturbative contribution to the correlator of two heavy-light quark currents in HQET expanded in light-quark masses up to quadratic terms is calculated at the leading order in . Ultraviolet and infrared renormalon poles of Borel images of the Wilson coefficients are discussed.
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