The production of meson resonance is measured at midrapidity ( ) in collisions at TeV using the ALICE detector at the CERN Large Hadron Collider. The resonance is reconstructed via its hadronic decay channel . The transverse momentum distributions are obtained for various centrality intervals in the range of . Measurements of integrated yields, mean transverse momenta, and particle yield ratios are reported and found to be consistent with previous ALICE measurements for within uncertainties. The -integrated yield ratio ) in central collisions shows a significant suppression at a level of relative to collisions. Thermal model calculations result in an overprediction of the particle yield ratio. Although both hadron resonance gas in partial chemical equilibrium (HRG-PCE) and simulations consider the hadronic phase, only HRG-PCE accurately represents the measurements, whereas simulations tend to overpredict the particle yield ratio. These observations, along with the kinetic freeze-out temperatures extracted from the yields measured for light-flavored hadrons using the HRG-PCE model, indicate a finite hadronic phase lifetime, which decreases with increasing collision centrality percentile. The -differential yield ratios ) and ) are presented and compared with measurements in pp collisions at TeV. Both particle ratios are found to be suppressed by up to a factor of five at in central collisions and are qualitatively consistent with expectations for rescattering effects in the hadronic phase. The nuclear modification factor ( ) shows a smooth evolution with centrality and is found to be below unity at , consistent with measurements for other light-flavored hadrons. The smallest values are observed in most central collisions, indicating larger energy loss of partons traversing the dense medium.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 622, Issue 1https://doi.org/10.1016/j.nima.2010.04.042