NRQCD Analysis of Bottomonium Production at the Tevatron
Eric Braaten, Sean Fleming, Adam K. Leibovich
Abstract
Recent data from the CDF collaboration on the production of spin-triplet bottomonium states at the Tevatron p p collider are analyzed within the NRQCD factorization formalism. The color-singlet matrix elements are determined from electromagnetic decays and from potential models. The color-octet matrix elements are determined by fitting the CDF data on the cross sections for Upsilon(1S), Upsilon(2S), and Upsilon(3S) at large pT and the fractions of Upsilon(1S) coming from chib(1P) and chib(2P). We use the resulting matrix elements to predict the cross sections at the Tevatron for the spin-singlet states etab(nS) and hb(nP). We argue that etab(1S) should be observable in Run II through the decay etab -> J/psi + J/psi.
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