A Measurement of Helicity-Frame Spin Alignment of Promptly Produced Y(nS) Mesons in p$\bar{p}$ Collisions at 1.96 TeV

Abstract

Measurements of Y( nS) spin alignment have been made, using 4.9 fb-1 of data ob­tained by the CDF II detector at the Tevatron. The analysis is performed in the s-channel helicity frame on Y mesons having rapidity |YI m(Y ).

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