UC Berkeley

We present a study of the inclusive charged-particle transverse momentum (pT$$p_{\mathrm{T}}$$) spectra as a function of charged-particle multiplicity density at mid-pseudorapidity, dNch/dη$$\mathrm{d}N_{\mathrm{ch}}/\mathrm{d}\eta $$, in pp collisions at s=5.02$$\sqrt{s}=5.02$$ and 13 TeV covering the kinematic range |η|<0.8$$|\eta |<0.8$$ and 0.150$$\,>0$$). The pT$$p_\mathrm{T}$$ spectra are reported for two multiplicity estimators covering different pseudorapidity regions. The pT$$p_{\mathrm{T}}$$ spectra normalized to that for INEL>0$$\,>0$$ show little energy dependence. Moreover, the high-pT$$p_{\mathrm{T}}$$ yields of charged particles increase faster than the charged-particle multiplicity density. The average pT$${ p}_{\mathrm{T}}$$ as a function of multiplicity and transverse spherocity is reported for pp collisions at s=13$$\sqrt{s}=13$$ TeV. For low- (high-) spherocity events, corresponding to jet-like (isotropic) events, the average pT$$p_\mathrm{T}$$ is higher (smaller) than that measured in INEL>0$$\,>0$$ pp collisions. Within uncertainties, the functional form of ⟨pT⟩(Nch)$$\langle p_{\mathrm{T}} \rangle (N_{\mathrm{ch}})$$ is not affected by the spherocity selection. While EPOS LHC gives a good description of many features of data, PYTHIA overestimates the average pT$$p_{\mathrm{T}}$$ in jet-like events.