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SUMMARY:Quarkonia production in jets at LHCb and in Pythia 8 - Naomi Cooke
 : University of Glasgow
DTSTART:20250603T100000Z
DTEND:20250603T110000Z
UID:TALK230992@talks.cam.ac.uk
CONTACT:Dr Paul Swallow
DESCRIPTION:The main subject of this seminar is to understand the producti
 on of quarkonia in more detail\, utilising their production in jets. Previ
 ous quarkonia in jets measurements from LHCb and CMS have shown discrepanc
 ies between data and current Pythia 8 MC predictions when measuring the no
 rmalised cross section vs. z(J/ψ) ≡ pT(J/ψ)/pT(jet) for prompt J/ψ’
 s. Pythia 8 predicts an isolated peak at z(J/ψ) ≃ 1 in comparison to da
 ta which is less isolated. First\, new measurements performed by LHCb to t
 ry and understand this discrepancy will be discussed\, namely normalised c
 ross sections vs. z for different quarkonia (J/ψ\, ψ(2S)\, Υ(1S)\, Υ(2
 S)\, Υ(3S) and X(3872)). Second\, to address this discrepancy in Pythia 8
  MC\, the introduction of quarkonia fragmentation functions into the parto
 n shower framework is discussed\, which are calculations based on the effe
 ctive field theory\, non-relativistic QCD (NRQCD).
LOCATION:Seminar Room -- RDC D2.002 
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