Feasibility Studies for Single Transverse-Spin Asymmetry Measurements at a Fixed-Target Experiment Using the LHC Proton and Lead Beams (AFTER@LHC)

Daniel Kikoła, Miguel García Echevarria, Cynthia Hadjidakis, Jean Philippe Lansberg, Cédric Lorcé, Laure Massacrier, Catarina Quintans, Andrea Signori, Barbara Trzeciak

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The measurement of Single Transverse-Spin Asymmetries, AN, for various quarkonium states and Drell–Yan lepton pairs can shed light on the orbital angular momentum of quarks and gluons, a fundamental ingredient of the proton-spin puzzle. The AFTER@LHC proposal combines a unique kinematic coverage and large luminosities thanks to the Large Hadron Collider beams to deliver precise measurements, complementary to the knowledge provided by collider experiments such as at RHIC. In this paper, we report on sensitivity studies for J/ψ, Υ and Drell–Yan AN done using the performance of LHCb-like or ALICE-like detectors, combined with polarised gaseous hydrogen and helium-3 targets. In particular, such analyses will provide us with new insights and knowledge about transverse-momentum-dependent parton distribution functions for quarks and gluons and on twist-3 collinear matrix elements in the proton and the neutron.

Original languageEnglish
Article number139
Number of pages13
JournalFew-Body Systems
Volume58
Issue number4
DOIs
Publication statusPublished - 17 May 2017

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