Possibility for $J\mathrm{/}\mathrm{\Psi }$ suppression in high multiplicity proton-proton collisions at $\sqrt{s_{NN}}=7$TeV

We study $J\mathrm{/}\mathrm{\Psi }$ absorption in high multiplicity proton-proton (pp) collisions at $\sqrt{s_{NN}}=7$TeV. We predict a modification of the $J\mathrm{/}\mathrm{\Psi }$-yield within the UrQMD transport approach, where explicit interactions of the $J\mathrm{/}\mathrm{\Psi }$ with the surrounding comovers and a prehadronic phase with adjusted cross sections and $J\mathrm{/}\mathrm{\Psi }$ melting is included. We present the analog of the nuclear modification factor in pp collisions at various charged particle multiplicities. It turns out that $J\mathrm{/}\mathrm{\Psi }$-Mesons may be suppressed towards higher particle multiplicities in pp collisions at LHC energies.