The PQCD approach towards to next-to-leading order: a short review

TL;DR

This review discusses the importance of resummation in $k_T$ factorization and summarizes recent progress in next-to-leading order calculations of B meson decays using the perturbative QCD approach, highlighting future development challenges.

Contribution

It provides a concise overview of recent advancements in NLO PQCD calculations for B meson decays and discusses key issues for future phenomenological applications.

Findings

Summarized progress in NLO calculations within PQCD.

Highlighted the role of resummation in $k_T$ factorization.

Commented on future development directions for PQCD.

Abstract

In this short review we elaborate the significance of resummation in $k_T$ factorization theorem, and summarize the recent progresses in the calculations of the next-to-leading order contributions to B meson decays from the perturbative QCD (PQCD) approach. We also comment on the current status of the PQCD approach and highlight some key issues to develop it in the near future for more phenomenological applications.