STAR measurements of elliptic flow in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV

The hot, dense nuclear medium created in Au+Au collisions at RHIC has exhibited strong, anisotropic collective motion, characterized by the elliptic flow v\_2. v\_2 has been extensively studied, and is thought to be related to the initial eccentricity of the colliding system and the parton density, quantified by 1/S*dN/dy. Collisions of heavier, deformed uranium nuclei will introduce different eccentricities, and will increase the achievable value of 1/S*dN/dy by 13\% [1]. Simulations therefore predict central U+U collisions to yield a significant increase in v\_2 over central Au+Au collisions [2], and also predict a cusp structure in v\_2 vs. multiplicity due to the deformation of uranium [3]. STAR has taken data of U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV in RHIC run2012. In this poster we present preliminary STAR measurements of v\_2 from these collisions. Physics implications of our measurements will also be discussed.\\[4pt] [1] C. Nepali, G. Fai, and D. Keane, Phys. Rev. C73 (2006) 034911.\\[0pt] [2] H. Masui, B. Mohanty, N. Xu, Phys. Lett. B679 (2009) 440.\\[0pt] [3] S. Voloshin, Phys. Rev. Lett.105 (2010) 172301.