Asymmetry measurement of charged hadron production in pA collisions at 40 GeV

TL;DR

This paper reports measurements of single spin asymmetries in charged hadron production from polarized proton collisions with nuclei at 40 GeV, revealing asymmetry patterns for various hadron types at high kinematic variables.

Contribution

It introduces new measurements of single spin asymmetries in pA collisions at 40 GeV, focusing on different charged hadrons and specific kinematic regions.

Findings

Observed significant asymmetries for charged pions, kaons, protons, and antiprotons at high Xt.

Provided detailed asymmetry data for different hadron species and kinematic conditions.

Enhanced understanding of spin effects in high-energy hadron production.

Abstract

The single spin asymmetry of charge hadron production by a 40 GeV/c proton beam with 39% transverse polarization incident on nuclei (C, Cu) has been measured using the Focusing Double Arm Spectrometer (FODS). The measurements were carried out for hadrons with high Xt (82 deg. in c.m.) and with high Xf (one arm at 51 deg. and the other arm at 99 deg. in c.m.). The results are presented for charged pions, kaons, protons and antiprotons with high Xt.