Jet Fragmentation Functions Measured in PbPb Collisions with CMS
Yetkin Yilmaz (for the CMS Collaboration)
TL;DR
This paper reports measurements of jet fragmentation functions in PbPb collisions at 2.76 TeV using CMS, revealing how parton energy loss affects the distribution of final state particles and providing insights into the medium's properties.
Contribution
It introduces the first detailed study of fragmentation functions in PbPb collisions, linking parton energy loss to modifications in jet particle distributions.
Findings
Significant imbalance in dijet transverse momentum observed.
Fragmentation functions show modifications in PbPb compared to pp collisions.
Results provide new insights into the medium-induced parton energy loss mechanisms.
Abstract
The energy loss of partons in high-energy nuclear collisions is one of the most interesting observables to probe the nature of the produced medium. Analyzing data from PbPb collisions at a center-of-mass energy of 2.76 TeV, recorded with the Compact Muon Solenoid (CMS) detector, parton energy loss is observed as a significant imbalance of dijet transverse momentum. To gain further understanding of the parton energy loss mechanism and how it manifests itself in the distribution of final state particles, fragmentation functions are studied for the leading and subleading jet in bins of dijet imbalance.
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