Within the study of quark-gluon plasma (QGP) flow in relativistic nuclear collision physics, the directed flow $v_1$ is a strong indicator of the conditions within the early stages of a collision wherein a QGP is formed. The Solenoidal Tracker at RHIC (STAR), a detector located at the Relativistic Heavy Ion Collider (RHIC), has collected Au+Au collision data suitable for the study of $v_1$, particularly at collision energies surrounding the softest point of the equation state which occurs at $\sqrt{s_{NN}}$ $\sim$ 11.5 GeV. Experimental $v_1$ measurements at midrapidity are presented for $p$, $\bar{p}$, $\Lambda$, $\bar{\Lambda}$, $\Xi^-$, $\Xi^+$, $\Omega^-$, and $\Omega^+$, and their midrapidity $dv_1/dy$, as well as measurements for $\pi^{+}$, $\pi^{-}$, $K^{+}$, and $K^{-}$, all taken at $\sqrt{s_{NN}}$ = 3.0, 9.2, 11.5, 14.5, and 19.6 GeV in Au+Au collisions recorded at STAR. We then compare the results between the baryons to test the coalescence sum rule—that directed flow takes place at the quark level; particularly, that old methods of calculation do not hold, and offer stronger calculations that do.

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