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PoS(DIS2017)125

Production of the hidden charm state $X(3872)$ and of $\psi(2S)$ with the ATLAS detector

J. Broughton, on behalf of the ATLAS collaboration

in XXV International Workshop on Deep-Inelastic Scattering and Related Subjects

Contribution: pdf

Abstract

Differential cross sections are presented for the prompt and non-prompt production of the hidden-charm state $X(3872)$ and $\psi(2S)$, in the decay mode $J/\psi\pi^+\pi^-$, measured at $\sqrt{s} = 8$ TeV by the ATLAS detector at LHC. In the non-prompt production, the data suggest the presence of a short-lived component, which may be due to $B_c$ decays. The dipion invariant masses in both $X(3872)$ and $\psi(2S)$ are measured and compared to theoretical predictions.