Correspondence between Color Glass Condensate and High-Twist Formalism

The color glass condensate (CGC) effective theory and the collinear factorization at high twist (HT) are two well-known frameworks describing perturbative QCD multiple scatterings in nuclear media. It has long been recognized that these two formalisms have their own domain of validity in different kinematic regions. Taking direct photon production in proton-nucleus collisions as an example, we clarify for the first time the relation between CGC and HT at the level of a physical observable. We show that the CGC formalism beyond shock-wave approximation, and with the Landau-Pomeranchuk-Migdal interference effect is consistent with the HT formalism in the transition region where they overlap. Such a unified picture paves the way for mapping out the phase diagram of parton density in nuclear medium from dilute to dense region.

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Publication Details

Journal
Physical Review Letters
Published
2025-07-16
DOI
https://doi.org/10.1103/physrevlett.135.032301
Citations
1
Primary Topic
High-Energy Particle Collisions Research
Type
article
Field-Weighted Citation Impact
1.87

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article

Correspondence between Color Glass Condensate and High-Twist Formalism

Hongxi Xing, Xin-Nian Wang, Farid Salazar, Y. Fu et al.
1 citations
Physical Review Letters
High-Energy Particle Collisions Research
1.87
article

Correspondence between Color Glass Condensate and High-Twist Formalism

Hongxi Xing, Xin-Nian Wang, Farid Salazar, Y. Fu, Zhong-Bo Kang
article en
1 citations

Abstract

The color glass condensate (CGC) effective theory and the collinear factorization at high twist (HT) are two well-known frameworks describing perturbative QCD multiple scatterings in nuclear media. It has long been recognized that these two formalisms have their own domain of validity in different kinematic regions. Taking direct photon production in proton-nucleus collisions as an example, we clarify for the first time the relation between CGC and HT at the level of a physical observable. We show that the CGC formalism beyond shock-wave approximation, and with the Landau-Pomeranchuk-Migdal interference effect is consistent with the HT formalism in the transition region where they overlap. Such a unified picture paves the way for mapping out the phase diagram of parton density in nuclear medium from dilute to dense region.

Physical Review LettersVol. 135(3)
Lawrence Berkeley National Laboratory (US), University of California, Los Angeles (US), Duke University (US), South China Normal University (CN), Chinese Academy of Sciences (CN), University of California System (US), Central China Normal University (CN), Key Laboratory of Guangdong Province (CN), Institute of Modern Physics (CN), Stony Brook University (US), University of California, Berkeley (US)
National Science Foundation, U.S. Department of Energy, National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province
Openalex Percentile: Top 13%
High-Energy Particle Collisions Research
1.87
DOIOpen Access PDFOpenAlex
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Correspondence between Color Glass Condensate and High-Twist Formalism — Hongxi Xing, Xin-Nian Wang, et al. · Physical Review Letters (2025) | TGRS Research Map | TGRS