If this is a vote, add me to the list. The old wording better captured
the phone discussion.
On 8/23/2013 6:54 PM, [log in to unmask] wrote:
> I agree with Marcus that the old wording was better.
>
> On Aug 23, 2013, at 6:59 PM, "Markus A. Luty"
> <[log in to unmask] <mailto:[log in to unmask]>> wrote:
>
>> The new sentence on the VLHC is substantially weaker than the one in
>> the version that we discussed in today's meeting, and that seemed to
>> me to get essentially unanimous support.
>>
>> The study called out in particular the potential of a 100 TeV hadron
>> collider for the exploration of electroweak symmetry breaking and
>> dark matter and recommended more concerted work on its design and its
>> physics capability.
>>
>> I recommend we change back to the old wording, something like
>>
>> The study in particular called out a 100 TeV hadron collider,
>> which has unprecedented potential reach for new physics associated with
>> electroweak symmetry breaking, naturalness, and dark matter.
>> Further work on its design and its physics capability...
>>
>>
>> Markus Luty
>>
>> ============================================
>> Physics Department
>> University of California, Davis
>> One Shields Avenue
>> Davis, CA 95616
>>
>> Phone: +1 530 554 1280
>> Skype: markus_luty
>>
>>
>>
>> On Fri, Aug 23, 2013 at 2:56 PM, Peskin, Michael E.
>> <[log in to unmask] <mailto:[log in to unmask]>> wrote:
>>
>> Folks,
>>
>> We met today to discuss the Snowmass summaries. In fact, the
>> whole hour was taken up with a
>> discussion of the paragraphs in the top-level executive summary.
>>
>> I attach a new version, then the minutes. Here is the new version:
>>
>> --------------------
>>
>> Energy Frontier. The mysteries of the newly discovered Higgs
>> boson were a major theme at Snowmass. The properties of the
>> Higgs boson raise crucial questions that guide large parts of the
>> future particle physics program. Indeed, this discovery changes
>> everything. It calls for a three-pronged research program at high
>> energy accelerators: first, to determine the properties of the
>> Higgs boson as accurately as possible, second, to make precise
>> measurements of the heavy particles $W$, $Z$, and the top quark,
>> which can carry the imprint of the Higgs field; and, third, to
>> search for new particles with TeV masses predicted by models of
>> electroweak symmetry breaking. Questions about the Higgs boson
>> also inspire the search for the dark matter particles and for
>> flavor-changing rare decays, since in both cases the motivating
>> theory often comes from models of the Higgs boson and its role in
>> symmetry-breaking.
>>
>> For at least the next fifteen years, the experiments at the Large
>> Hadron Collider at CERN will drive the Energy Frontier program
>> forward. The Higgs boson discovery at the LHC now becomes a
>> precision study of the properties of this particle. The
>> high-luminosity LHC will measure Higgs boson couplings at the
>> few-percent level and provide the first measurement of the Higgs
>> self-coupling. The steps of the LHC to 300 fb$^{-1}$ and then to
>> 3000 fb$^{-1} will explore deeply for new particles produced
>> through either the strong or the electroweak interactions. They
>> will probe for new dynamics of $W$, $Z$, and Higgs at TeV
>> energies and study rare decays using a sample of billions of top
>> quarks. The LHC experiments have already proven their ability to
>> work as global collaborations. Detector and accelerator
>> components, technology and physics insight, and leadership from
>> the US have played indispensible roles.
>>
>> There is a strong scientific motivation for continuing this
>> program with lepton colliders. Experiments at lepton colliders
>> can reach sub-percent precision in the Higgs boson properties in
>> a model-independent way, enabling discovery of percent-level
>> deviations predicted in theoretical models. They can improve the
>> precision of our knowledge of the $W$, $Z$, and top properties by
>> an order of magnitude, allowing the discovery of predicted new
>> physics effects. They search for new particles with unequivocal
>> discovery or exclusion, complementing new particle searches at
>> the LHC. A global effort has now completed the technical design
>> of the International Linear Collider (ILC) accelerator and
>> detectors that will provide these capabilities. The Japanese
>> high energy physics community has named this facility as its
>> first priority.
>>
>> The Snowmass study considered many other options for high-energy
>> colliders that might be realized over a longer term. These
>> included higher energy linear colliders, circular e+e- colliders,
>> muon colliders, and photon colliders. The study called out in
>> particular the potential of a 100 TeV hadron collider for the
>> exploration of electroweak symmetry breaking and dark matter and
>> recommended more concerted work on its design and its physics
>> capability.
>>
>> In all of the projects listed above, US leadership in developing
>> experimental and accelerator technology is playing a critical
>> role. These US initiatives are essential to meet the world-wide
>> scientific goals in particle physics.
>>
>>
>> -------------------------------
>>
>> It is still not perfect. Please send proposed changes to this
>> list by the end of the day tomorrow (Saturday).
>>
>>
>>
>> Now to the minutes of the meeting
>>
>> Present were:
>>
>> Chip, Michael, Sally, Markus, Tom L., Daniel, Andrei, Cecilia,
>> Rick, Kaustubh, Reinhardt, Yuri, Graham, Andy W., Soeren,
>> Liantao, Robin
>>
>> The main criticisms of the previous version were:
>>
>> Not enough emphasis on Higgs. Higgs should be first in all lists.
>> Among longer-term accelerator projects, there was special
>> interest in VLHC, and this out to be called out.
>> Some emphasis needed on US contributions and US "leadership"
>>
>> Chip and I hope that these concerns are addressed in the new
>> version above.
>>
>> Thanks,
>>
>> Michael
>>
>>
>> -------------------------------------------------------------------------------------------
>> Michael E. Peskin [log in to unmask]
>> <mailto:[log in to unmask]>
>> HEP Theory Group, MS 81 -------
>> SLAC National Accelerator Lab. phone: 1-(650)-926-3250
>> <tel:1-%28650%29-926-3250>
>> 2575 Sand Hill Road fax: 1-(650)-926-2525
>> <tel:1-%28650%29-926-2525>
>> Menlo Park, CA 94025 USA www.slac.stanford.edu/~mpeskin/
>> <http://www.slac.stanford.edu/%7Empeskin/>
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