Speaker
Description
Hadronic resonances are short-lived particles whose lifetimes are comparable to the hadronic phase lifetime of the system produced in ultrarelativistic nucleon-nucleon or nuclear collisions. These resonances are sensitive to the hadronic phase effects such as rescattering and regeneration processes which might affect the resonance yields and shape of the transverse momentum spectra. In addition, event shape observables like transverse spherocity are sensitive to the hard and soft processes. They are useful tools to distinguish the isotropic and jetty-dominated events in pp collisions. Studying the dependence of the yield of resonance on transverse spherocity and multiplicity allows us to understand the resonance production mechanism with event topology and system size respectively. Furthermore, the measurements in small systems are used as a reference for heavy-ion collisions and are helpful for the tuning of Quantum chromodynamics inspired event generators. In this contribution, we present recent results on K∗(892)0 production obtained by the ALICE experiment in pp collisions at several collision energies, event multiplicities and as a function of transverse spherocity. The results include the transverse momentum spectra, yields and their ratio to the yields of long-lived particles. The measurements done using the ALICE detector will be compared with the corresponding results from models such as PYTHIA8, EPOS-LHC etc., and the measurements at lower energies.
