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Color glass condensate meets high twist expansion

Journal Article · · Physical Review. D.
DOI:https://doi.org/10.1103/ckhv-5213· OSTI ID:2928016
 [1];  [2];  [3];  [4];  [5]
  1. Duke Univ., Durham, NC (United States); Central China Normal University, Wuhan (China)
  2. Univ. of California, Los Angeles, CA (United States); Stony Brook Univ., NY (United States)
  3. Univ. of Washington, Seattle, WA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States); Univ. of California, Los Angeles, CA (United States)
  4. Central China Normal University, Wuhan (China); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  5. South China Normal University (SCNU), Guangzhou (China); Guangdong Provincial Key Laboratory of Nuclear Science (China); Chinese Academy of Sciences (CAS) (China)
We establish the correspondence between two well-known frameworks for quantum chromodynamics (QCD) multiple scattering in nuclear media: the color glass condensate (CGC) and the high-twist (HT) expansion formalism. We argue that a consistent matching between both frameworks, in their common domain of validity, is achieved by incorporating the subeikonal longitudinal momentum phase in the CGC formalism, which mediates the transition between coherent and incoherent scattering. We perform a detailed calculation and analysis of direct photon production in proton-nucleus scattering as a concrete example to establish the matching between HT and CGC up to twist-4, including initial- and final-state interactions, as well as their interferences. The techniques developed in this work can be adapted to other processes in electron-nucleus and proton-nucleus collisions, and they provide a potential avenue for a unified picture of dilute-dense dynamics in nuclear media.
Research Organization:
Duke Univ., Durham, NC (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
US Department of Energy; USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC02-05CH11231; FG02-00ER41132; FG02-05ER41367
OSTI ID:
2928016
Alternate ID(s):
OSTI ID: 2587938
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 112; ISSN 2470-0010; ISSN 2470-0029
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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