Abstract
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 music smash simulations consider the hadronic phase, only HRG-PCE accurately represents the measurements, whereas music smash 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.
1 More- Received 22 September 2023
- Accepted 22 February 2024
DOI:https://doi.org/10.1103/PhysRevC.109.044902
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by CERN.
©2024 CERN, for the ALICE Collaboration