Hadronic resonance production with ALICE at the LHC

Abstract

Recent results on short-lived hadronic resonances obtained with the ALICE detector at LHC energies are presented. These results include masses, widths, transverse momentum spectra, yields, and ratios of resonance yields to longer-lived ground-state particles, and elliptic flows. The results are compared with model predictions and measurements at lower energies.

Figures (7)

• Figure 1: Mass (top, left) and $p_\mathrm{T}$-differential yield (top, right) of the $f_{1}$. The $p_\mathrm{T}$ spectrum is fitted by a Levy–Tsallis Levy-Tsallis function. (bottom, left) The average transverse momentum of $f_{1}$ with that of all other light flavor hadrons ALICEpp713, ALICEpp13SstarXstar. (bottom, right) The particle yield ratios $\phi/\pi$ALICEpp713 and $f_{1}/\pi$ with model predictions from $\gamma_{S}$-CSM GsCSM.
• Figure 2: Mass (a) and width (b) of the $\Omega^{*}$. Results of Belle Belle1, Belle2 are also shown.
• Figure 3: (a) The transverse-momentum spectrum of the $\Omega^{*}$ in HM pp collisions at $\sqrt{s}$ = 13 TeV (not corrected for the unmeasured branching ratio BR for the studied decay channel). The shaded band surrounding the curve indicates the region spanned by the envelope of alternate functions used to describe the spectrum, which affect the extrapolation of the yield to low $p_\mathrm{T}$. (b) The ratio of the parameterized yield to the measured yield.
• Figure 4: (color online) Left: Ratios $\mathrm{K}^{*\pm}/\mathrm{K}$ and $\mathrm{K}^{*0}/\mathrm{K}$ALICEpp13 as a function of the charged-particle multiplicity density in pp collisions at $\sqrt{s}$ = 13 TeV. Model predictions from PYTHIA6 Perugia, PYTHIA8 Monash, EPOS-LHC EPOSLHC and DIPSY DIPSY are also shown. Right: Ratios $\mathrm{K}^{*\pm}/\mathrm{K}$ as a function of $p_\mathrm{T}$ for low (X) and high (I) multiplicity classes.
• Figure 5: Double ratios of $f_{0}$ to $\pi$ (left) and $\mathrm{K}^{*0}$ (right) as a function of multiplicity in pp collisions at $\sqrt{s_\mathrm{NN}}$ = 13 TeV. Model predictions from $\gamma_{S}$-CSM GsCSM are also shown.