Kavli Affiliate: Feng Yuan
| First 5 Authors: Paul Caucal, Marcos Guerrero Morales, Edmond Iancu, Farid Salazar, Feng Yuan
| Summary:
Within the Colour Glass Condensate effective theory, we demonstrate that
back-to-back dijet correlations in dilute-dense collisions involving a
small-$x$ quark from the nuclear target can be factorised in terms of universal
transverse momentum dependent distributions (TMDs) for the sea quarks. Two
building blocks are needed to construct all these TMDs at the operator level:
the sea quark TMD operator which appears in semi-inclusive Deep-Inelastic
Scattering (SIDIS) or in the Drell-Yan process and the elastic $S$-matrix for a
quark-antiquark dipole. Compared to SIDIS, the saturation effects are stronger
for dijet production in forward proton-nucleus collisions, due to additional
scattering in the initial and final state, effectively resulting in a larger
value for the nuclear saturation momentum.
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