# SPD - the Spin Physics Project with Polarized Proton and Deuteron Beams at the NICA Collider

## TL;DR

The SPD experiment at the NICA collider aims to explore nucleon spin structure and polarization effects through polarized proton and deuteron collisions, utilizing a universal detector to measure asymmetries in various particle productions.

## Contribution

This paper presents the design and scientific goals of the SPD experiment, a novel setup for investigating nucleon spin phenomena at the NICA collider.

## Key findings

- Design of a universal 4π detector for spin physics
- Projected measurements of asymmetries in Drell-Yan, charmonium, and photon production
- Potential to access all leading twist TMD PDFs in nucleons

## Abstract

The SPD experiment at the future NICA collider at JINR (Dubna, Russia) aims to investigate the nucleon spin structure and polarization phenomena in collisions of longitudinally and transversely polarized protons and deuterons at $\sqrt{s}$ up to 27 GeV and luminosity up to 10$^{32}$ cm$^{-2}$ s$^{-1}$. Measurement of asymmetries in the Drell-Yan pairs, charmonium and prompt photon production can provide an access to the full set of leading twist TMD PDFs in nucleons. The experimental setup is planned as a universal 4$\pi$ detector for a wide range of physics tasks.