Nuclear Modifications to Transverse Momentum Distributions
ORAL
Abstract
We perform the first simultaneous global QCD extraction of the transverse momentum dependent (TMD) Parton Distribution Functions in nuclei and the nuclear modified TMD Fragmentation Functions, which encode the three-dimensional information on the partonic structure of nuclei, and hadron formation in a nuclear medium, respectively. This analysis takes into account the world data from semi-inclusive electron-nucleus deep inelastic scattering and Drell-Yan di-lepton production in proton-nucleus collisions, comprising a total of 126 data points from 6 data sets. We quantify for the first time the broadening of partonic distributions in nuclei comparing with those in free nucleons. We also make predictions for the ongoing JLab 12 GeV program and future EIC measurements, which will further constrain the three-dimensional partonic structure of nuclei.
*Hongxi Xing and Daniele Paolo Anderle are supported by the Guangdong Major Project of Basic and Applied Basic Research No. 2020B0301030008, the Key Project of Science and Technology of Guangzhou (Grant No. 2019050001), the National Natural Science Foundation of China under Grant No. 12022512, No.~12035007. Daniele Paolo Anderle is also supported by the China Postdoctoral Science Foundation under Grant No.~2020M672668.Mishary Alrashed is supported by the UCLA REU program. Zhong-bo Kang is supported by the National Science Foundation under Grant No.~PHY-1945471. John Terry is supported by NSF Graduate Research Fellowship Program under Grant No.~DGE-1650604. This work is also supported within the framework of the TMD Topical Collaboration.
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Publication:Three-dimensional imaging in nuclei (Planned)
