Hi EF conveners,

We are attaching a draft of the top group report (needless to say, parts of it are quite preliminary since the associated studies are still
not complete)...

Regards,

Cecilia, Reinhard, Robin, Kaustubh, and Kirill


________________________________________
From: [log in to unmask] [[log in to unmask]] on behalf of Mark Thomson [[log in to unmask]]
Sent: Sunday, July 14, 2013 8:55 AM
To: Raymond Brock
Cc: snowmass-ef
Subject: Re: [SNOWMASS-EF] Minutes EF Conveners July 11, 2013

Dear Chip,

Please don't forget CLIC in this discussion. CLIC is an option for a future energy frontier machine and is supported by the European strategy and as such should be included in the coupling projection tables. We have been working on a fairly complete set of Higgs measurement uncertainties in a staged scenario and most studies are based on a full simulation of the detector and beam conditions. We would like to see two CLIC scenarios presented the initial 350 GeV stage and ultimate CLIC sensitivity from an example staging scenario of 350 GeV, 1.4 TeV and 3.0 TeV.

cheers,
Mark





On 12 Jul 2013, at 22:40, Raymond Brock <[log in to unmask]<mailto:[log in to unmask]>> wrote:

MInutes of the EF Conveners Meeting, July 11, 2013

Attending: Sally, Tom, Heather, Markus, Liantao, Rick, Jianming, Soeren, Chris, Michael P, Doreen, Cecilia, Chip

0) We will meet next week, but we decided to shift the meeting time/date 24 hours to Friday, July 19 since many will be at the US ATLAS annual workshop before that.

1) A discussion of the plans for the projections of Higgs couplings was discussed. With the information provided by the LHC experiments, it's difficult to do fits without assumptions. Not enough input information is available to do model-independent fitting. The possibility exists that ATLAS and CMS will come out with information and new fits by ECFA, but not in time for Minn. and so a procedure is required. In any case, should that occur, and should we know that this might be coming, we need to be flexible enough to be able to adjust and/or insert the new information in final writeups, even if it's after Minneapolis.

At this time the proposal is to at least include:

1. a table with LHC, HL-LHC, 250, 500, 1000 GeV ILC, and TLEP coupling projections. For LHC the "scenario 1 and scenario 2" numbers from CMS will be used, but be called "Snowmass projections" or something generic. Hopefully ATLAS will do some similar scaling for the high luminosity running and also include missing couplings. If that happens, then it might be possible to combine CMS and ATLAS for a generic "Snowmass projection." This remains to be seen.

2. snowmass fits which combine the "snowmass projected" LHC couplings with the 250 GeV ILC couplings.

3. The question of how to integrate the Higgs group's results with the NP groups desire for exploring capabilities for new discoveries is complicated. Without inputs from the LHC collaborations, the Higgs group is reluctant to "engineer" inputs. It might be possible to "reverse engineer" the situation by the NP group asking itself what precisions would be necessary in order to make a discovery of a given significance and hope that this would either correspond to values used in 1. or might induce the ATLAS and CMS collaborations to make a focused effort on particular couplings that may be highlighted through a reverse-engineering approach.

This all needs to be thought through more thoroughly.

2) There was concern about how to treat the relatively new TLEP in comparison with the more mature ILC predictions. The feeling was that words in the text that somehow make the point that ILC is more mature in its simulations might not be sufficient, and that this sort of distinction should be included in any table caption that made comparisons. This is an issue across the working groups. Once the drafts are written, we'll revisit this question in the context of specific examples.

3) Markus Luty made the suggestion that in the same way that EF convener meetings have been enlightening, maybe it would be fruitful to have cross-frontier, joint convener meetings in Minneapolis.

Which evenings might be available for this was not decided. Looking after the meeting, the schedule is a little tight. The EF PIs will meet with the agencies at the same time in the evening as the CF PIs on August 1, so that removes that day. 7/30, 7/31, 8/2 are similarly booked with events. The first evening, August 29 is unscheduled as is Saturday evening August 3.

Michael will contact JoAnne and try to come up with a straw-agenda for such a get-together and bring it back to this group for consideration.

4) The page limit was brought up. Slavish adherence to a 30 page limit if 40 or 50 is necessary to tell the whole story seems unwise. So we'll continue to try to aim at 30, but work on the principle of being sensible and complete. More on this as time goes on.


---------------------------------------------------------------
Raymond Brock  *  University Distinguished Professor
Department of Physics and Astronomy
Michigan State University
Biomedical Physical Sciences
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East Lansing, MI  48824
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