Hi,

This is Yen-Chu Chen of CDF. I went to the Muon Collider meeting some time
ago but got too busy to continue.

For sure after the discovery of a Higgs like particle such accelerator 
proposal
is very interesting and important for the future.

However 250 GeV sounds a very well focused energy to study Higgs particle.
How about 400 GeV, which allows both Higgs and top quark physics? Generating
top quark pairs via electron-positron annihlation, together with a good 
detector,
can produce a very precise measurement of the top quark mass. The production
asymmetry of top quark can also be studied in e- e+ (or mu- mu+) collision.

Maybe more expansive but we pay more and gain much more.

Best regards, Yen-Chu

於 2012/7/24 上午 08:40, Adam Para 提到:
> Ron,
> good and timely idea. I am wondering if we should not include into the list of topics to discuss/evaluate two circular machines at 250 GeV, one muon and one electron based. This kind of options are likely to surface at Snowmass and more work is done in a coherent fashion - more useful the discussions at Snowmass will be.
>
> Adam Para
>
>
> On Jul 24, 2012, at 8:28, "Ron Lipton" <[log in to unmask]> wrote:
>
>> I would like to restart our Muon Collider meetings with a meeting Wednesday, Aug 1 at
>> 11:30 in the FIshtank at Fermilab.  Given the Higgs-like boson discovery, the will
>> be an increased focus on prospects for a s-channel Higgs factory and I would like
>> to use this meeting to discuss and organize studies of this option in preparation
>> for "Snowmass".  Please let me know if you have something to present or would
>> like discussed. David Neuffer will present his re-examination of the machine
>> in the following meeting, August 8.
>>
>>
>> Ron
>>
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