1 Minutes from 27.02.2013 2 ======================== 3 4 5 1) in the status presentation: 6 7 - functionalities of the new upcoming release were presented 8 - the upcoming new release will be a beta and made publicly availabe 9 for the next HERAFitter User's meeting to be fixed via doodle 10 - almost 90 downloads till today, 31 developers 11 12 13 2) Update from Fred Olness group: ACOT status and issues 14 15 - implemented and will be available in the next release 16 the NLO based kfacctors (from QCDNUM) for F2 and FL (and F3) 17 for Fc, Fb will still be based on LO (massive)/NLO (massive). 18 This is currently working only for NC, plans to extend for CC too. 19 20 - variations of the scales muf and mur (muf used to regulate the IR 21 collinear singularities, mur to regulate UV divergences). 22 For ACOT Full mur=muf=mu, however it can be generalzed later (this convention 23 avoids extra log terms). 24 For ACOT ZM: Based on Furmanski & Petronzio; can be generalized. 25 For ACOT chi : Complete up to NLO-Quark term; can be generalized. 26 27 28 3) Michiel Botje: QCDNUM QCD+QED evolu/on status update 29 30 - large efforts to write an evolution toolbox where the 31 user can feed-in the splittin functions, perturbative expansion 32 coefficients ents and do n-fold coupled evolutions. 33 34 A list of steps should be performed to complete the task. 35 The ready steps are: 36 37 o Basic nxn evolution routine 38 o Loop over subgrids 39 o New address mechanism for PDFs 40 41 Time scale is of order of a month to complete the 42 next steps which includes also user interface and writeup. 43 44 45 4) Andrii Gizhko presented the scale variation for DIS in the HERAFitter 46 and a proposal how to unify these treatments for user steering options. 47 48 - presented an overview of current possible options for mur and muf scale variations 49 - a simple relation to treat the scle variations is proposed. Scale setup for FF, FF ABM, 50 ACOT Full, ACOT Chi and ZMVFNS was implemeted and tested. 51 52 5) status update on HERAverager from Pavel Belov 53 54 - The compatibility with the HERAFitter has been improved: 55 o usage of the environment variables for calling of the 56 HERAFitter, longer ﬁle names in the HERFitter itself. 57 o The dimensions of the internal arrays has been ajusted to 58 work on different computer systems and it seems that it 59 works well, but probably takes more memory than needed. 60 o The averaging of the multiple processes has been tested. 61 The results are good, but it revealed the necessity to 62 improve the output format and to make more ﬂexible 63 plotting tools 64 65 - ongoing cleaning of the package before releasing it.
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