# XIIIth Quark Confinement and the Hadron Spectrum

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

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

1 Aug 2018, 14:00
20m
Hall H (Arts Bldg.)

### Hall H

#### Arts Bldg.

Talk C: Heavy quarks

### Speaker

Mr Daniel Moreno (IFAE)

### Description

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)

### Co-authors

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

### Presentation Materials

There are no materials yet.