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(Seminar) HQET Renormalization Group improved Lagrangian at O(1/m^3) with LL accuracy
2018-11-02     Text Size:  A

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

HQET Renormalization Group improved Lagrangian at O(1/m^3) with LL accuracy

Speaker

报告人

Daniel Moreno

Affiliation

所在单位

IFAE, Autonomous University of Barcelona

Date

日期

2018年11月2日(周五)上午10:00

Venue

地点

Conference Room 322, ITP main building

Abstract

摘要

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/m^3), 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.

Contact person

所内联系人

郭奉坤

 

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