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Measurement of fifth- and sixth-order fluctuations of (net-)proton number in $Au + Au$ collisions from phase II of the beam energy scan program at RHIC

https://doi.org/10.1103/lq8c-9fr6

Aboona, B E; Adam, J; Adamczyk, L; Aggarwal, I; Aggarwal, M M; Ahammed, Z; Alshammri, A K; Aschenauer, E C; Aslam, S; Atchison, J; et al (May 2026, Physical Review C)

Free, publicly-accessible full text available May 1, 2027
Measurement of medium-induced acoplanarity in central Au-Au and $p p$ collisions at $\sqrt{s_{N N}} = 200$ GeV using direct- $photon + jet$ and $π^{0}$ $+$ jet correlations

https://doi.org/10.1103/k29c-d5ry

Aboona, B E; Adam, J; Adamczyk, L; Aggarwal, I; Aggarwal, M M; Ahammed, Z; Alshammri, A K; Anderson, D M; Aschenauer, E C; Aslam, S; et al (January 2026, Physical Review C)

Free, publicly-accessible full text available January 1, 2027
Beam-energy dependence of correlations between mean transverse momentum and anisotropic flow of charged particles in Au+Au collisions at RHIC

https://doi.org/10.1016/j.physletb.2026.140378

Aboona, BE; Adam, J; Agakishiev, G; Aggarwal, I; Aggarwal, MM; Ahammed, Z; Aitbayev, A; Alekseev, I; Alpatov, E; Alshammri, AK; et al (May 2026, Physics Letters B)

Free, publicly-accessible full text available May 1, 2027
Energy Independence of the Collins Asymmetry in $p^{↑} p$ Collisions

https://doi.org/10.1103/jgsw-zhny

Aboona, B E; Adam, J; Adamczyk, L; Aggarwal, I; Aggarwal, M M; Ahammed, Z; Alshammri, A K; Aschenauer, E C; Aslam, S; Atchison, J; et al (December 2025, Physical Review Letters)

The STAR experiment reports new, high-precision measurements of the transverse single-spin asymmetries for $π^{\pm}$ within jets, namely the Collins asymmetries, from transversely polarized $p^{↑} p$ collisions at $\sqrt{s} = 510 GeV$ . The energy-scaled distribution of jet transverse momentum, $x_{T} = 2 p_{T, jet} / \sqrt{s}$ , shows a remarkable consistency for Collins asymmetries of $π^{\pm}$ in jets between $\sqrt{s} = 200 GeV$ and 510 GeV. This indicates that the Collins asymmetries are nearly energy independent, with, at most, a very weak scale dependence in $p^{↑} p$ collisions. These results extend to high-momentum scales ( $Q^{2} \leq 3400 {GeV}^{2}$ ) and enable unique tests of evolution and universality in the transverse-momentum-dependent formalism, thus providing important constraints for the Collins fragmentation functions.
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Free, publicly-accessible full text available December 1, 2026

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