Probing Heavy Quarkonium Production Mechnism: c polarization
Abstract
The necessicity of the color-octet mechanism in describing heavy quarkonium production is a longstanding puzzle. Compared to the yields of heavy quarkonium, its polarizations should be a sensitive observable to pin down the color-octet contributions. In this talk, I will focus on the c polarization in hadroproduction processes, which may provide a unique test for the color-octet mechanism in nonrelativistic QCD.
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