Nonrelativistic QCD analysis of bottomonium production at the Fermilab Tevatron - art. no. 094006

Recent data from the CDF Collaboration on the production of spin-triplet bo ttomonium states at the Fermilab Tevatron p (p) over bar collider are analy zed within the NRQCD factorization formalism. The color-singlet matrix elem ents are determined from electromagnetic decays and from potential models. The color-octet matrix elements are determined by fitting the CDF data on t he cross sections for Y(1S), Y(2S), and Y(3S) at large p(T) and the fractio ns of Y(1S) coming from chi (b)(1P) and chi (b)(2P). We use the resulting m atrix elements to predict the cross sections at the Tevatron for the spin-s inglet states eta (b)(nS) and h(b)(nP). We argue that eta (b)(1S) may be ob servable in run II through the decay eta (b)-->J/psi +J/psi.