What question did this study set out to answer?

The research aims to analyze the in-medium suppression of Υ(1S, 2S, 3S) states in high-energy Pb-Pb collisions.

May 17, 2026Nuclear Physics B0 citationsOpen Access

In-medium Υ(1S, 2S, 3S) suppression in Pb-Pb collisions at sNN=5.02 TeV

JMJ. MajonicaHeidelberg University GWG. WolschinHeidelberg University

Key Points

The research aims to analyze the in-medium suppression of Υ(1S, 2S, 3S) states in high-energy Pb-Pb collisions.
Model calculations performed for Υ states in Pb-Pb collisions at sNN=5.02 TeV
Parameters determined through simultaneous χ2 minimizations against CMS data
Focus on centrality- and transverse-momentum-dependent suppression patterns.
Observed suppression of Υ(1S, 2S, 3S) states matches model predictions
Data leads to determination of initial central temperature and formation times for Υ states
Highlights the sequential suppression behavior under varying collision conditions.

Abstract

We present model calculations for the in-medium suppression of the Υ(1 S , 2 S , 3 S ) states in s N N = 5.02 TeV Pb-Pb collisions at the Large Hadron Collider in comparison with recent CMS data for all three spin-triplet s -wave states. The model parameters initial central temperature, and formation times for the Υ( nS ) states are determined in simultaneous χ 2 minimizations with respect to the data, such that the sequential centrality- and transverse-momentum-dependent suppression of the observed states is reproduced.

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