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The dependence of $\mathrm{f}_{0}$(980) production on the final-statecharged-particle multiplicity in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}} =5.02$ TeV is reported. The production of $\mathrm{f}_{0}$(980) is measured withthe ALICE detector via the $\mathrm{f}_0 (980) \rightarrow \pi^{+}\pi^{-}$decay channel in a midrapidity region of $-0.5<y<0$. Particle yield ratios of$\mathrm{f}_{0}$(980) to $\pi$ and $\mathrm{K}^{*}$(892)$^{0}$ are found to bedecreasing with increasing charged-particle multiplicity. The magnitude of thesuppression of the $\mathrm{f}_{0}$(980)/$\pi$ and$\mathrm{f}_{0}$(980)/$\mathrm{K}^{*}$(892)$^{0}$ yield ratios is found to bedependent on the transverse momentum $p_{\mathrm{T}}$, suggesting differentmechanisms responsible for the measured effects. Furthermore, the nuclearmodification factor $Q_{\mathrm{pPb}}$ of $\mathrm{f}_{0}$(980) is measured invarious multiplicity ranges. The $Q_{\mathrm{pPb}}$ shows a strong suppressionof the $\mathrm{f}_{0}$(980) production in the $p_{\mathrm{T}}$ region up toabout 4 GeV/$c$. The results on the particle yield ratios and$Q_{\mathrm{pPb}}$ for $\mathrm{f}_{0}$(980) may help to understand the latehadronic phase in p$-$Pb collisions and the nature of the internal structure of$\mathrm{f}_{0}$(980) particle.

Observation of abnormal suppression of $\mathrm{f}_{0}$(980) production in p$-$Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV