The measurement of top quark spin correlation is an important tool for precise studies of top quark interactions. In this Letter I construct a quantization axis maximizing the spin correlation at the LHC within the Standard Model. Using this axis a spin correlation of 48 or even more, on applying additional cuts, can be reached. This represents a significant improvement compared to the helicity bases studied thus far. (c) 2005 Elsevier B.V. All rights reserved.
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