Nucleon Energy Correlators for the Color Glass Condensate

Journal Article · 02 May 2023 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.130.181901 · OSTI ID:1972254

Liu, Hao-Yu  ^[1]; Liu, Xiaohui  ^[2]; Pan, Ji-Chen  ^[3]; Yuan, Feng ^[4]; Zhu, Hua Xing ^[5]

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1. Beijing University of Chemical Technology (China)
2. Beijing Normal University (China); Peking University, Beijing (China)
3. Chinese Academy of Sciences (CAS), Beijing (China)
4. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Nuclear Science Division
5. Zhejiang University, Hangzhou (China)

We demonstrate the recently proposed nucleon energy-energy correlator (NEEC) $$f$$$_{EEC}$$$$(x,θ)$ can unveil the gluon saturation in the small-$$x$$ regime in $eA$ collisions. The novelty of this probe is that it is fully inclusive just like the deep-inelastic scattering (DIS), with no requirements of jets or hadrons but still provides an evident portal to the small-$$x$$ dynamics through the shape of the $$θ$$ distribution. We find that the saturation prediction is significantly different from the expectation of the collinear factorization.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); USDOE
• Grant/Contract Number: AC02-05CH11231; 12175016; 11975200; 11925506; 11621131001
• OSTI ID: 1972254
• Alternate ID(s): OSTI ID: 2229301
• Journal Information: Physical Review Letters, Vol. 130, Issue 18; ISSN 0031-9007
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English