Author

Star Collaboration

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Open access Aug 2023

Measurements of the $Z^{0}/γ^{*}$ cross section and transverse single spin asymmetry in 510 GeV $p$$+$$p$ collisions

The differential cross section for $Z^{0}$ production, measured as a function of the boson's transverse momentum ($p_{\mathrm{T}}$), provides important constraints on the evolution of the transverse momentum dependent parton distribution functions (TMDs). The transverse single spin asymmetry (TSSA) of the $Z^{0}$ is se...

Star Collaboration · arXiv.org · 5 citations

Preprint Oct 2026

Probing the production mechanisms of virtual photons at RHIC

We report the measurement of direct virtual photon ($\gamma^*_\text{dir} \rightarrow e^+e^-$) in four Au+Au collision energies at $\sqrt{s_\text{NN}}$ = 14.6--54.4 GeV. The $\gamma^*_\text{dir}$ yields scale with charged-particle multiplicity ($(dN_{\mathrm{ch}}/d\eta)^{\alpha}$) as $\alpha=1.43 \pm 0.04 \text{(stat.)}...

Star Collaboration · 0 citations

Preprint Sep 2026

Photon-induced $J/\psi$ as a linearly polarized probe of collision geometry in relativistic heavy-ion collisions

In relativistic heavy-ion collisions, the linear polarization of quasi-real photons can correlate the spin orientation of photon-induced vector mesons with the collision geometry. To explore this sensitivity, we present the first measurement of the decay angular distribution of photon-induced $J/\psi$ with respect to t...

Star Collaboration · 0 citations