English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Recently the proof of factorization in heavy quarkonium production in NRQCDcolor octet mechanism is given at next-to-next-to-leading order (NNLO) incoupling constant by using diagrammatic method of QCD. In this paper we provefactorization in heavy quarkonium production in NRQCD color octet mechanism atall order in coupling constant by using path integral method of QCD. Our proofis valid to all powers in the heavy quark relative velocity. We find that thegauge invariance and the factorization at all order in coupling constantrequire gauge-completed non-perturbative NRQCD matrix elements that wereintroduced previously to prove factorization at NNLO.

Proof of NRQCD Factorization at All Order in Coupling Constant in Heavy Quarkonium Production