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Search for muoproduction of \(X(3872)\) at COMPASS and indication of a new state \(\widetilde{X}(3872)\)

By Mher Aghasyan and others
We have searched for exclusive production of exotic charmonia in the reaction \(\mu^+~N \rightarrow \mu^+ (J\!/\!\psi\pi^+\pi^-)\pi^{\pm}~N'\) using COMPASS data collected with incoming muons of 160 GeV/\(c\) and 200 GeV/\(c\) momentum. In the \(J\!/\!\psi\pi^+\pi^-\) mass distribution we observe a signal with a statistical significance of 4.1 \(\sigma\). Its mass and width... Show more
July 26, 2018
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Search for muoproduction of $X(3872)$ at COMPASS and indication of a new state $\widetilde{X}(3872)$
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