HonexComb meeting #17

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16-20 participants

 

Nuclear PDFs by Aleksander Kusina

 

Discussion

 

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

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