期刊
PHYSICAL REVIEW LETTERS
卷 118, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.192004
关键词
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资金
- Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory
- U.S. Department of Energy Office of Science, Office of Nuclear Physics [DE-FG02-93ER-40762, DE-AC02-05CH11231]
- Office of Science and Technology in Shanghai Municipal Government [11DZ2260700]
- National Science Foundation of China [11175114, 11405104]
Applying the connection between the parton Wigner distribution and orbital angular momentum (OAM), we investigate the probe of the gluon OAM in hard scattering processes at the planned electron-ion collider. We show that the single longitudinal target-spin asymmetry in the hard diffractive dijet production is very sensitive to the gluon OAM distribution. The associated spin asymmetry leads to a characteristic azimuthal angular correlation of sin(phi(q) - phi(Delta),) where phi(Delta) and phi(q) are the azimuthal angles of the proton momentum transfer and the relative transverse momentum between the quark-antiquark pair. This study may motivate a first measurement of the gluon OAM in the proton spin sum rule.
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