July 31, 2018 to August 6, 2018
Maynooth University
Europe/Dublin timezone

HQET renormalization group improved Lagrangian at $\mathcal{O}(1/m^3)$ with leading logarithmic accuracy

Aug 1, 2018, 2:00 PM
Hall H (Arts Bldg.)

Hall H

Arts Bldg.

Talk C: Heavy quarks Heavy quarks


Mr Daniel Moreno (IFAE)


In this talk we explain how to obtain the renormalization group improved expressions of the Wilson coefficients of the HQET Lagrangian with leading logarithmic approximation to ${\cal O}(1/m^3)$, which includes the heavy quark chromopolarizabilites. For the spin-independent sector, our analysis includes the effects induced by spectator quarks. We observe that the numerical impact of these logarithms is very large in most cases. The Wilson coefficients we compute are necessary ingredients to obtain the pNRQCD Lagrangian with NNNLL accuracy, which in turn is the necessary precision to obtain the complete heavy quarkonium spectrum with NNNLL accuracy, and also necessary for the computation of the production and annihilation of heavy quarkonium with NNLL precision.

Primary author

Mr Daniel Moreno (IFAE)


Dr Antonio Pineda (IFAE) Mr Xabier Lobregat (IFAE) Mr Rudin Petrossian-Byrne (Oxford University)

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