Transverse Spin Physics at HERMES
U. Elschenbroich, G. Schnell, R. Seidl (for the HERMES Collaboration)
TL;DR
The HERMES experiment measures single-spin asymmetries in semi-inclusive pion production using a transversely polarized hydrogen target, providing new insights into quark transversity and the Sivers function.
Contribution
First measurement of single-spin asymmetries in semi-inclusive pion production with a transversely polarized hydrogen target at HERMES.
Findings
Extraction of two sine-dependent asymmetries related to transversity and Sivers function
Evidence supporting the existence of non-zero transversity distributions
Insights into the transverse spin structure of the nucleon
Abstract
Single-spin asymmetries in semi-inclusive pion production are measured by the HERMES experiment for the first time, with a transversely polarised hydrogen target. Two different sine-dependencies are extracted which can be related to the quark distributions transversity h_1(x) and the Sivers function f_1T^perp(x).
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · High-Energy Particle Collisions Research