Hedditch, J.Lasscock, B.Leinweber, D.Williams, A.Kamleh, W.Zanotti, J.Irving, A.McNeile, C.Michael, C.2007-05-142007-05-142005Proceedings of Science: XXIIIrd International Symposium on Lattice Field Theory, 25-30 July 2005 / pp.040/1-040/61824-8039http://hdl.handle.net/2440/29096We investigate the mass of the 1⁻⁺ exotic meson, created with hybrid interpolating fields. Access to light quark masses approaching 25 MeV is facilitated by the use of the Fat-Link Irrelevant Clover (FLIC) fermion action, and large (20³ ×40) lattices. Our results indicate that the 1⁻⁺ exotic exhibits significant curvature close to the chiral limit, and yield a 1⁻⁺ mass in agreement with the π 1(1600) candidate and exclusive of the π1(1400).enCopyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.Conference paper002005209710.22323/1.020.00402-s2.0-8505686412153883Leinweber, D. [0000-0002-4745-6027]Williams, A. [0000-0002-1472-1592]Kamleh, W. [0000-0002-6177-5366]Zanotti, J. [0000-0002-3936-1597]