HonexComb meeting #17



HonexComb meeting #17
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Jacek Tomasz Otwinowski
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16-20 participants


Nuclear PDFs by Aleksander Kusina




Q: given the precision achieved for the gluon nPDF for instance, can we already extract physics from it?

A:  caveat: the (very-)low x and Q2 region is only constrained by one dataset for now (LHCb D mesons), important to have an independent measurement for confirmation.


Q: what are the next important theory developments?

A: UPC and NNLO calculations


Q: do you have any other observable in your wishlist that we have never thought about before?

A: more-differential measurements are always welcome and beneficial for global fits, but that's just a matter of more data 


Discussion on the feasibility for differential ttbar cross section in pPb in the future and predictions for fixed-target data. 

  • nPDFs fits would profit from more differential in rapidity ttbar cross section measurements 
  • high-x studies with the fixed target measurements (AFTER@LHC projections were shown)


EWB combination proposal by Guillaume Taillepied

  • a working group representing all LHC experiments has been established 
  • start with Z bosons in pPb collisions at 5 TeV in central (ATLAS/CMS) and forward (ALICE/LHCb) rapidities  

Total charm cross section by Jeremy Wilkinson

  • total charm cross section in pp collisions at 5 TeV using for the first time open charm mesons and baryons from ALICE, CMS and LHCb measurements 
  • paper draft is being finalized and will be released soon


No need to go through collaborations as long as only public info are used

There are minutes attached to this event. Show them.
    • 3:00 PM 3:10 PM
      Intoduction 10m
      Speakers: Alexander Philipp Kalweit (CERN), Christian Bierlich (Lund University (SE)), Giulia Manca (Universita` degli studi di Cagliari and INFN, Cagliari, IT), Iwona Grabowska-Bold (AGH University of Science and Technology (PL)), Jacek Tomasz Otwinowski (Institute of Nuclear Physics Polish Academy of Sciences (PL)), Jacopo Ghiglieri (Centre National de la Recherche Scientifique (FR)), Raphael Granier De Cassagnac (Centre National de la Recherche Scientifique (FR))
    • 3:10 PM 3:45 PM
      Nuclear PDFs 35m
      Speaker: Aleksander Kusina
    • 3:45 PM 4:00 PM
      EW boson combination proposal 15m
      Speaker: Guillaume Taillepied (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
    • 4:00 PM 4:15 PM
      Total charm cross section - draft presentation 15m
      Speakers: Christian Bierlich (Lund University (SE)), Christian Bierlich, Jeremy Wilkinson (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)), Jiayin Sun (Universita e INFN, Cagliari)
    • 4:15 PM 4:30 PM
      AOBs 15m
      • data / analysis preservation and publication strategy