Compact Muon Solenoid
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| CMS-PAS-HIN-23-010 | ||
| Search for jet quenching signature using transverse momentum balance in high-multiplicity pPb collisions at the CMS detector | ||
| CMS Collaboration | ||
| 24 September 2024 | ||
| Abstract: The first measurement of the dijet transverse momentum balance ($ x_{j} $) in proton-lead (pPb) collisions at $ \sqrt{s_{\text{NN}}}= $ 8.16 TeV is presented. The analysis uses data collected by the CMS detector in 2016, corresponding to an integrated luminosity of 174.6 $ \,\text{nb}^\text{ $-1 $ } $. The $ x_{j} $ and its average are measured as functions of the event charged particle multiplicity for three different center-of-mass pseudorapidity configurations: forward, backward, and mid-rapidity, enabling measurements in both proton- and lead-going directions. High-multiplicity triggers are used to select events with up to 400 charged particles, aimed at probing potential jet quenching effects. The ratio of $ x_{j} $ in high- versus low-multiplicity events is used to quantify the results. All measurements are consistent with unity and are in good agreement with simulations of the hard scattering process that do not include quark-gluon plasma production. These results indicate no evidence of a jet quenching signature in small colliding systems, even in high-multiplicity events that exhibit the strongest signals of collectivity. | ||
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Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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