Transverse Single Spin Asymmetries of Heavy Flavor Electrons and Charged Pions in 200 GeV $p+p^{\uparrow}$ Collisions at Midrapidity

TL;DR

This paper reports measurements of transverse single spin asymmetries for heavy flavor electrons and charged pions in 200 GeV proton-proton collisions, providing insights into the spin-momentum structure of protons.

Contribution

It presents new experimental results on spin asymmetries at midrapidity, utilizing advanced detectors to probe initial and final state spin effects in proton collisions.

Findings

Measured asymmetries for electrons and pions at midrapidity.

Provides data on gluon spin-momentum correlations.

Contributes to understanding of proton spin structure.

Abstract

Transverse single spin asymmetries of particles produced in $p+p^{\uparrow}$ collisions provide insight on the partonic spin and momentum structure of hadrons; heavy flavor electrons provide access to initial state spin-momentum correlations of gluons in the proton, while charged pions provide access to initial and final state transverse spin effects. Charged particles are measured at midrapidity at PHENIX using the silicon vertex detector and central arm spectrometer, made of an electromagnetic calorimeter, a ring-imaging Cherenkov detector, and drift and pad chambers. Recent results for both electron and charged pion measurements from the 2015 running period will be presented.