Nuclear and Particle Physics Colloquium 64

Speaker:Daniel Moreno, IFAE

Place:Room 316, Main Building, Beihang University

Time:10:00-12:00, October 29, 2018

Title:HQET Renormalization Group improved Lagrangian at O(1/m3) with LL accuracy

Abstract:

We explain how to obtain the renormalization group improved expressions of the Wilson coefficients of the HQET Lagrangian with leading logarithmic approximation to O(1/m3), which includes the heavy quark chromopolarizabilites. 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.

References:

1. D. Moreno, A. Pineda, Phys.Rev. D 97 (2018) no.1, 016012

Erratum: Phys.Rev. D 98 (2018) no.5, 059902.

2. X. Lobregat, D. Moreno, R. Petrossian-Byrne, Phys.Rev. D 97 (2018) no.5, 054018

3. D. Moreno, Phys.Rev. D 98 (2018) no.3, 034016