/ hep-ex FERMILAB-PUB-15-485-E

Evidence for simultaneous production of $J/\psi$ and $\Upsilon$ mesons

Pages: 8

Abstract: We report evidence for the simultaneous production of $J/\psi$ and $\Upsilon$ mesons in 8.1 fb$^{-1}$ of data collected at $\sqrt{s}=$1.96 TeV by the D0 experiment at the Fermilab $p \bar p$ Tevatron Collider. Events with these characteristics are expected to be produced predominantly by gluon-gluon interactions. In this analysis, we extract the effective cross section characterizing the initial parton spatial distribution, $\sigma_{eff}=2.2\pm 0.7\mbox{(stat)} \pm 0.9 \mbox{(syst)} ~\mbox{mb}$.

Note: *Temporary entry*; 8 pages, 3 figures. Will be submitted to Phys. Rev. Lett

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Запись создана 2015-12-01, последняя модификация 2015-12-01

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