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We perform a quantitative analysis of the decays of $cc\bar c\bar c$tetraquarks with $J^{PC}=0^{++}, 2^{++}$ into 4 muons and into hidden- andopen-charm mesons and estimate, for the first time, the fully charmedtetraquark decay width. The calculated cross section upper limit is $\sim 40$fb for the 4 muons channel, and $\sim 28$ nb for the $D^{(*)} \bar D^{(*)} \toe\mu$ channel. On the basis of our results, with the present sensitivity LHCbshould detect both signals, for $0^{++}$ and $2^{++}$ fully-charmedtetraquarks.

A study of $c c\bar{c}\bar{c}$ tetraquark decays in 4 muons and in $D^{(*)} \bar{D}^{(*)}$ at LHC

A study of $c c\bar{c}\bar{c}$ tetraquark decays in 4 muons and in $D^{()} \bar{D}^{()}$ at LHC