Hi Heather,
I think that's a good suggestion.
Cheers,
Tom
On 8/19/2013 9:44 PM, Heather Logan wrote:
> Hi Tom and Michael,
>
> I think in Chip's slides he described these searches as
> "loophole-free". How about a working like,
>
> "Experiments at lepton colliders allow for clear discovery or
> unequivocal exclusion of new particles in searches that complement
> those at the LHC." ?
>
> -Heather
>
> On Sat, 17 Aug 2013, Tom LeCompte wrote:
>
>> Hi Michael,
>>
>> I am not sure Line 119 says what we want it to say: " Experiments at
>> lepton colliders allow unambiguous searches for new particles...". I
>> don't think you mean the searches themselves are unambiguous (and by
>> extension, that the searches at the LHC are ambiguous). Maybe you
>> mean that the *interpretations* are unambiguous (or at least clearer)
>> than at hadron colliders.
>>
>> See you Thursday,
>>
>> Tom
>>
>>
>> On 8/17/2013 5:35 PM, Peskin, Michael E. wrote:
>>> Dear Colleagues,
>>>
>>> Chip and I have been presenting at the DPF meeting and trying to
>>> catch up on our sleep.
>>> However, the work for Snowmass is not yet done. We have some
>>> important questions
>>> for you.
>>>
>>> I attach a draft of the highest-level Executive Summary of Snowmass.
>>> This is in a very
>>> preliminary state; please do not circulate it further. Chip and I
>>> ask in particular whether
>>> you are in agreement with the 3-paragraphs that relate specifically
>>> to Energy Frontier.
>>> I attach these at the end of this note. This document is under
>>> revision now, so please
>>> send your reactions as soon as possible.
>>>
>>> The executive summary will be the first part of a 30-page Snowmass
>>> summary document.
>>> That will include a 4-5 page summary of the results of the Energy
>>> Frontier study. Chip and I
>>> are working on our final revisions of a first draft. We will
>>> circulate that to this list tomorrow.
>>>
>>> The 30-page summary of Energy Frontier is not yet ready to be
>>> circulated. We are sorry for the
>>> delay. However, this document will follow closely the long version
>>> of Chip's talk given on Sunday
>>> at Snowmass. We just need to put this into prose.
>>>
>>> We would like to return to our scheduled phone meeting of the EF
>>> conveners this week and
>>> next week. I remind you that time is 11am PDT/ 2pm EDT Thursday, and
>>> that the coordinates are:
>>>
>>> August 22: 11:00 PDT / 2:00 EDT
>>> Contact information:
>>>
>>> You call: domestic... (877) 873-8018
>>> international... (636) 651-3182
>>>
>>> participant code: 290-043
>>>
>>> We will start the meeting promptly and end promptly after 1 hour.
>>>
>>> The agenda for this week is discussion of the two summary documents.
>>>
>>> I hope that your working group reports are headed toward completion
>>> by the end of the month.
>>> I promised written comments on the drafts, but -- please excuse me
>>> -- I did not send these yet.
>>> Please expect them early this week.
>>>
>>> Chip and I would like to thank you again for all of the work that
>>> you have put in thus far. Chip
>>> received much positive feedback on his talk at Snowmass, but, of
>>> course, the supporting work
>>> is yours. We are grateful.
>>>
>>> Best wishes,
>>>
>>> Michael
>>>
>>>
>>> --------------------------------------------------------------------------------------
>>>
>>>
>>>
>>> EF paragraphs in the Snowmass executive summary
>>> (In the full document, you will see that this is followed by
>>> paragraphs from the accelerator side)
>>>
>>>
>>> The mysteries of the newly discovered Higgs boson were a major theme
>>> at Snowmass. Much attention was given to the importance of studying
>>> the Higgs boson as closely as possible. At high energy accelerators,
>>> the �Energy Frontier,� there are three approaches: first, to search
>>> for new particles with TeV masses predicted by models of electroweak
>>> symmetry breaking, second, to make precise measurements of the heavy
>>> particles $W$, $Z$, and the top quark, which can carry the imprint
>>> of the Higgs, and, third, to measure the properties of the Higgs
>>> boson itself to very high precision. This program is closely
>>> connected to the search for the dark matter particle and for
>>> flavor-changing rare decays; in both cases, the motivating theory is
>>> often associated with the Higgs and its symmetry-breaking.
>>>
>>> For at least the next fifteen years, the experiments at the Large
>>> Hadron Collider at CERN will drive this program forward. Especially
>>> in its high-luminosity phase, the LHC is expected to explore deeply
>>> for new particles produced through either the strong or the
>>> electroweak interactions. They LHC will study rare decays using a
>>> sample of billions of top quarks, probe for new dynamics of W, Z,
>>> and Higgs at TeV energies. It will measure Higgs boson couplings at
>>> the few-percent level and provide the first measurement of the Higgs
>>> self-coupling. The LHC experiments have already proved their ability
>>> to work as global collaborations. Technology, insights, and
>>> leadership from the US have played important roles in these
>>> experiments.
>>>
>>> There is strong scientific motivation for continuing this program
>>> with lepton colliders. Experiments at lepton colliders allow
>>> unambiguous searches for new particles that complement those at the
>>> LHC. They can improve our precision knowledge of W, Z, and top by an
>>> order of magnitude, potentially bringing these measurements into
>>> confrontation with theory. They can reach sub-percent precision in
>>> the Higgs boson properties, allowing discoveries of percent-level
>>> deviations predicted in theoretical models. A global effort has now
>>> completed the technical design of the International Linear Collider
>>> (ILC), an accelerator that will give these capabilities. The
>>> Japanese high energy physics community has named this facility as
>>> its first priority.
>>>
>>>
>>>
>>> -------------------------------------------------------------------------------------------
>>>
>>> Michael E. Peskin [log in to unmask]
>>> HEP Theory Group, MS 81 -------
>>> SLAC National Accelerator Lab. phone: 1-(650)-926-3250
>>> 2575 Sand Hill Road fax: 1-(650)-926-2525
>>> Menlo Park, CA 94025 USA www.slac.stanford.edu/~mpeskin/
>>>
>>> ---------------------------------------------------------------------------------------------
>>>
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>>
>>
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>
> ----------------------------------------------------------
> Heather E. Logan http://www.physics.carleton.ca/~logan
> Department of Physics, Carleton University, Ottawa, Canada
>
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