[RBRC Seminar] Unveiling the Sea: Identifying Quark Distributions in the Color Glass Condensate

by Farid Salazar

Thursday 30 Jan 2025, 12:30 → 14:30 US/Eastern

2-160 (https://bnl.zoomgov.com/j/1600983728?pwd=RAD7OLcqre7Ycsp6JfFp6HAnpyLxex.1)

The seminal work in [1] established a transverse-momentum-dependent (TMD) factorization at low-x based on the Color Glass Condensate (CGC). The authors showed the generalized universality of small-x gluon distribution: the dipole and the Weizsäcker-Williams type. Efforts have been made to extend this factorization to next-to-leading order (NLO) and to elucidate the phenomenological consequences of saturation at colliders.

In this seminar, I will show that TMD factorization also holds for low-x sea quark-initiated channels in electron-nucleus and proton-nucleus collisions [2]. I will provide explicit proof of this factorization by examining various processes in the CGC at NLO. I will highlight the role of initial and final state interactions, and the resulting process-dependent gauge link structures of these low-x sea-quark TMD distributions. I will briefly comment on the relative importance between gluon and sea-quark distributions at low-x for various two-particle correlation observables.

[1] F. Dominguez, C. Marquet, B-W. Xiao, and F. Yuan. Phys.Rev.D83:105005,2011

[2] P. Caucal, E. Iancu, F. Salazar, F. Yuan. [work in progress]