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   1 ========== minutes of HERAFitter User's meeting 22.04.2013 =============
   2 Status (post beta3):
   3 ====================
   4  - beta-3 released in March, plan to have stable release in October (freeze deliverable by 1 August)
   5  - call for feedback for possible improvements (feedback collected on a dedicated web page for developers to address)
   6  - planned publication, references, benchmarking/validatons under consideraton
   7  - future developments: 
   8       - short term (planned to be included in the stable) 
   9         o scale variation (done)
  10         o ACOT NNLO (ongoing)
  11         o QED PDF (ongoing)
  12       - long term (planned):	
  13         o ACOT in QCDNUM
  14 	o EW corrections
  15 	o Intrinsic charm (proposed after discussion)
  16 	o Different evolu5on schemes
  17 	o top codes, HATHOR still performant (was discussed and agreed to have a presentation from Sebastian at the next User's meeting)
  18 	o Additional tools to transform covariance matrix to nuisance parameter representation	
  19 	o Alterna5ve to MINUIT minimiza5on package
  20 
  21 
  22 
  23 Next meeting foreseen end of May (28 or 29, doodle set)
  24 
  25 http://doodle.com/6h3mrx4e5saw68m6
  26 
  27 
  28 =======
  29 Mandy gave a summary on last PDF4LHC meeting (which took place at CERN 17 Apr),
  30 covering updated on all main PDF fitting groups and future prospects.
  31  discussion on the PDF wish list at LHC (slide 14):
  32  - jets/di-jets: machinery exists in HERAFitter
  33  - APPLGRID interface to photon dedicated codes (such as JETPHOX)
  34  - Interface of APPLGRID to MCFM for W+charm (done)
  35  - Applgid interface to DYNNLO (ongoing), 
  36  - off-resonance DY (ongoing)
  37  - ttbar: Harthor and MCFM with Applgid in HERAFitter; Harthor recent updated version released,
  38         should be implemented into HERAFitter (NNLO with resumations)
  39  - single top: Harthor is not updated but possible to use MCFM
  40  - Intrinsic charm: requires extra parametrisation for charm in HERAFitter (to be done)
  41  - charminium production: not clear (those are long term plans)
  42  - nuclear PDFs: interest from CTEQ (Ingo + Tzvetalina), long term
  43 
  44 ======
  45 Renat presented fast evaluation of gamma gamma->ll cross sections using Applgrid,
  46       the stand alone Applgrid to SANC MC created and tested with MRST2004qed pdfs,
  47       impementation into HERAFitter is ongoing as it relies on generalized evolution 
  48       kernels in QCDNUM (onging efforts from M. Botje)
  49       Results that were presented were validated against the paper arXiv:0911.2329v2.
  50       and very good agreement was found. The effect increases for high masses, reaching
  51       up to 6% contribution/
  52 
  53  comments to Renat's talk:
  54   - mu_f is factorisation scale, set to Z mass for comparisons from paper
  55    it's not so relevant what exactly it is used, however it was questioned the
  56    size of the elastic cross section contribution which was assumed
  57    to be small at LHC (reduced with cuts) - to be checked.
  58 
  59 ===

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