Polarized J/psi production from B mesons at the Tevatron

Abstract

In the framework of NRQCD and parton model, we estimate in detail,the production cross section for polarized J/psi from B meson decays. In order to contrast with data, we also take into account additional J/psi production due to decay of excited charmonium states. We calculate the helicity parameter, alpha, and as an application, we study our results for the Tevatron. This is in contrast to the earlier studies which were performed for prompt J/psi production from p pbar collisions. Our estimates are, for J/psi from B decays, alpha_{J/psi} = -0.04 +- 0.06 and for B decays to psi', alpha_{psi'}= -0.03 +- 0.07. These results have been evaluated in the J/psi transverse momentum interval, 10 GeV < k_T < 30 GeV. In the limit of the color singlet model, alpha shows a direct dependence on the Peterson parameter, thereby reflecting the dynamics of the b quark hadronization. With Run II of the Tevatron, it is expected that the fits for alpha will improve by about a factor of 50, leading to better limits on the matrix elements.

45 pages LaTex, 9 figures, 8 tables, matches version accepted for publication in PRD

References in corpus (7)

• Is There a Significant Excess in Bottom Hadroproduction at the Tevatron?
• Low-Energy Supersymmetry and the Tevatron Bottom-Quark Cross Section
• Evidence for Colour-Octet Mechanism from CERN LEP2 gamma gamma -> J/psi + X Data
• Measurement of the $B^{+}$ Total Cross Section and $B^{+}$ Differential Cross Section $d\sigma /d{p}_T$ in $p\bar{p}$ Collisions at $\sqrt{s}=1.8$ TeV
• Study of Inclusive Production of Charmonium Mesons in B Decay
• Measurement of Inclusive B --> psi Production
• Polarization of Prompt J/psi and Upsilon(nS)

Cited by in corpus (4)

• Measurement of the J/Psi Meson and b-Hadron Production Cross Sections in ppbar Collisions at sqrt s = 1960 GeV
• Inclusive J/psi and psi(2S) production from b-hadron decay in p anti-p and pp collisions
• Measurement of the polarizations of prompt and non-prompt J/$\psi$ and $\psi$(2S) mesons produced in pp collisions at $\sqrt{s}$ = 13 TeV
• Experimental Review of the Quarkonium Physics at the LHC