Minutes of the REF Advisory Board meeting on Dec 20, 2018
(present: Gunar, Igor, Krzysztof, Laurent, Markus, Miguel, Andrea, Pierre, Piet, Ignacio, Francesco, Hannes)

- REF 2018 in Cracow was a success, thanks a lot again to the local committee of K. Kutak, A. van Hameren, A. Kusina, P. Kotko, S. Sapeta and J. Mosurek.
The discussions, moderated by session conveners, during the workshop were interesting, lively and encouraging.
The tutorial session was successful, ca 40 people attended.

- New list of members of the Advisory board:
Hannes Jung (DESY, chair), E. Aschenauer (BNL), D. Boer (Groningen U.), I. Cherednikov (Antwerpen U.), M. Diehl (DESY), M. Echevarría (INFN Pavia), L. Favart (UL Brussel), F. Hautmann (Oxford U., Antwerpen, Bilbao), K. Kutak (IFJ PAN Cracow), P. Mulders (VU, Amsterdam), G. Schnell (Bilbao U.), I. Scimemi (Madrid U.), A. Signori (Argonne), P. Van Mechelen Pierre (Antwerpen U.)
People leaving the AB: Didar Dobur, David Dudal, Fabio Maltoni

A email list for the AB has been set up, to keep the list up-to-date: ref-ab@desy.de 
(please use this list for communication with the REF AB)

- Discussion on next REF workshop:
Pavia (with M. Echevarria as a chair) made a proposal to hold the next REF workshop 25 - 28 Nov 2019
Details can be found on his presentation at: https://indico.desy.de/indico/event/22181/

Please put the dates and the announcement as soon as possible on inspire conference.

- Discussion on Tutorial/School
Every second year, a Tutorial and School could be organized, perhaps in addition to the REF workshop.
The DESY Terascale offers a frame for school and tutorial, with the necessary infrastructure at DESY, like
workshop accounts, computing environment , etc. The Terascale runs regularly schools. The REF school 
could be part of it.

- Proceedings of REF2018
We won't have usual proceedings, where every presentation will be covered. Instead it was discussed to have
a dedicated effort to perform systematic comparisons of predictions for 
 - DY production at LHC energies (ATLAS Coll Eur.Phys.J. C76 (2016) no.5, 29110.1140/epjc/s10052-016-4070-4 e-Print: arXiv:1512.02192 [hep-ex] | PDF)
 - high pt dijets in the back-to-back region at LHC energies (CMS Coll http://cds.cern.ch/record/2281813?ln=en, to be published soon)

We will ask the different groups to provide predictions for the xsection measurements including systematic uncertainties: PDF uncertainties, scale uncertainties, etc).
Calculations should be preferably at NLO, if available at NNLO and clearly stating the order used for the soft gluon resummation.

The calculations should be performed until beginning of March 2019, such that a short writeup can be produced. 

Hannes & Krzysztof (chair of the REF 2018 org comm)