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Here are some comments on V4 executive summary. As per Chip's instructions, I am focusing on the parts other than the energy frontier executive summary. -------------------------- On the big questions: I would suggest putting questions 1, 9, and 10 together, although I realize that there are probably political sensitivities involved in the current order. Specific suggestions for the questions: Question 1: Like Ashutosh, I found it a little vague. It is not obvious what research in our field is addressing these questions. Also, I think it does not do justice to just how fundamental the Higgs is, how we now see everything through Chip's Higgs glasses. Old paragraph: 1. How do we understand the Higgs boson? What principle determines its couplings to quarks and leptons? Why does it condense and acquire a vacuum value throughout the universe? Is there one Higgs particle, or many? Is the Higgs particle elementary or composite? Suggested paragraph: 1. Is the Higgs boson solely responsible for the mass of all elementary particles? Are there additional Higgs bosons? Is the Higgs particle elementary or composite? The Higgs boson has potential connections to many of the other questions below. Can we experimentally establish these connections? Question 9: I think it should refer more to principles and big ideas rather than particles. Old paragraph: 9. Are there new particles at the TeV energy scale? Such particles are motivated by the problem of the Higgs boson, and by ideas about spacetime symmetry such as supersymmetry and extra dimensions. If they exist, how do they acquire mass, and what is their mass spectrum? Do they carry new sources of quark and lepton mixing and CP violation? Suggested new paragraph: 9. What are the principles that determine the Higgs boson mass scale? Naturalness of this scale motivates new particles at the TeV scale, and possibly new spacetime symmetries associated with supersymmetry or extra dimensions. Can we establish these principles experimentally if these new particles are discovered? Do they provide clues to the pattern of quark and lepton mixing and CP violation? Question 10: Suggest that "higher energies" be made more concrete, say TeV scale. Old paragraph: 10. Are there new particles at higher energies? ... Suggested new paragraph: 10. Are there new particles at energies beyond the TeV scale? -------------------------- Suggestions for the introductory section: Line 11: "What are the most elementary constituents of nature and what are the forces that cause them to interact?" I would change this to: "What are the principles that underlie the fundamental laws of nature? What are the elementary constituents of matter and the forces that cause them to interact?" Line 18: "The discovery of the Higgs boson in 2012 completes the picture of the particle world called the Standard Model..." This paragraph is written as if we know there is only one Higgs boson. Of the questions that are mentioned, none of them refer to BSM physics such as SUSY or extended EWSB sectors. Old paragraph: The discovery of the Higgs boson in 2012 completes the picture of the particle world called the Standard Model, a remarkable achievement made possible by decades of worldwide collaboration. However, the Standard Model still leaves significant questions unanswered: What is the nature of the Higgs boson? What do neutrino masses tell us? Are the known forces part of a unified structure? What is the composition of 95% of the universe? What mechanism explains the dominance of matter over antimatter? To answer these questions, a variety of approaches is needed rather than a single experiment or technique. Particle physics uses three basic approaches, often characterized as exploration across the cosmic, energy, and intensity frontiers. Each approach employs different tools and techniques, but they ultimately address the same fundamental questions. Suggested new paragraph: The Higgs boson discovery in 2012 completes the particle content of the Standard Model of particle physics and gives the first direct experimental information about the mechanism for generating mass for elementary particles. This is a remarkable achievement made possible by decades of worldwide collaboration. However, the Standard Model still leaves significant questions unanswered: Is the Higgs boson solely responsible for particle masses? Is the Higgs boson mass scale natural? What do neutrino masses tell us? Are the known forces part of a unified structure? What is the composition of 95% of the universe? What mechanism explains the dominance of matter over antimatter? Particle physics uses three basic approaches, often characterized as exploration across the cosmic, energy, and intensity frontiers. Each approach employs different tools and techniques, but they ultimately address the same fundamental questions. Line 29: "In designing a program, the priorities of other regions of the world need to be taken into account." This sounds a bit weak, like we are letting others dictate our science policy. I would prefer that we make clear that the fact that other countries are contributing substantially is an opportunity for the US. Suggested new wording: The ambitious program of answering these questions requires long-term vision and global partnerships. Other regions of the world are contributing increasingly to this effort, and true international partnership is essential for further progress. .... Best, Markus Luty ============================================ Physics Department University of California, Davis One Shields Avenue Davis, CA 95616 Phone: +1 530 554 1280 Skype: markus_luty On Sat, Aug 24, 2013 at 8:00 PM, Meenakshi Narain < [log in to unmask]> wrote: > Dear Chip and Michael, > > Attached is a v4 document with a few corrections. I note two of the > comments below (rest are editorial or minor stylistic) > > 1) the EF section section is missing a definition of “Energy Frontier” > analogous to the definition of “Intensity Frontier” > given in the previous section. It is of course ironic that the Higgs > property measurements precisely fit the definition of the Intensity > Frontier… > Maybe: Experiments at the “Energy Frontier” directly explore physics at > the highest energies achieved in the laboratory. > > 2) “How do we understand…” style thing in the big questions section. I > have some suggested changes. > > Regards > Meenakshi > > > > ------------------------------ > > Use REPLY-ALL to reply to list > > To unsubscribe from the SNOWMASS-EF list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=SNOWMASS-EF&A=1 > > > > > On Aug 23, 2013, at 3:03 PM, Raymond Brock <[log in to unmask]> wrote: > > hi > During our conversation: > > Here's what we got during our phone conversation. Ignore the Energy > Frontier words, since we're working on them. This shows the status of the > Capabilities and other stuff. > > best > Chip > > > Begin forwarded message: > > *From: *"JoAnne L. Hewett" <[log in to unmask]> > *Subject: **Re: Version 4 of the Exec Summary* > *Date: *August 23, 2013 2:43:49 PM EDT > *To: *"Jonathan L. Rosner" <[log in to unmask]> > *Cc: *"CSS2013 Conveners -- [log in to unmask]" <[log in to unmask]>, chip > brock <[log in to unmask]>, Daniel Cronin-Hennessy <[log in to unmask]>, > Howard Nicholson <[log in to unmask]>, Jonathan Feng < > [log in to unmask]>, Lothar Bauerdick <[log in to unmask]>, "Marcel > Demarteau" <[log in to unmask]>, Marge Bardeen <[log in to unmask]>, > "Michael Dine" <[log in to unmask]>, "Michael E. Peskin" < > [log in to unmask]>, Murdock Gilchriese <[log in to unmask]>, > Pierre Ramond <[log in to unmask]>, "Ritz, Steven M." < > [log in to unmask]>, "Ronald J. Lipton" <[log in to unmask]>, "Shipsey, Ian > P." <[log in to unmask]>, "Steven Gottlieb" <[log in to unmask]>, "Weerts, > Harry" <[log in to unmask]>, Nick Hadley <[log in to unmask]> > > Seems I neglected to actually attach the document.....sorry. Here it is. > > On Thu, 22 Aug 2013, JoAnne L. Hewett wrote: > > Hi All, > > Here is version 4 - already! I inserted all of Jon's and Gil's comments > and Jonathan's new version of the big questions to the best of my ability. > Inexplicably, Jon's and Gil's line numbers did not correspond with my > version. Go figure. One comment on Gil's corrections, is that I think > both Harry and I felt strongly that it actually was a realization at > Snowmass that neutrino physics has entered the precision era. So I left > that phrase in the text. > > Re Jonathan's revision of the questions - they look good to me! I left in > the first "How do we understand" phrase for the Higgs boson, as it seems to > be very accurate there. > > Keep sending your comments! > > -JoAnne > > > ------------------------------ > > Use REPLY-ALL to reply to list > > To unsubscribe from the SNOWMASS-EF list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=SNOWMASS-EF&A=1 > <Snowmass_Exec_Summ_V4.docx> > > > --------------------------------------------------------------- > Raymond Brock * University Distinguished Professor > Department of Physics and Astronomy > Michigan State University > Biomedical Physical Sciences > 567 WIlson Road, Room 3210 > East Lansing, MI 48824 > sent from: [log in to unmask] > > cell: (517)927-5447 > MSU office: (517)353-1693/884-5579 > open fax: (517)355-6661 > secure fax: (517)351-0688 > Fermilab office: (630)840-2286 > CERN Office: 32 2-B03 * 76-71756 > > Twitter: @chipbrock > Home: http://www.pa.msu.edu/~brock/ > ISP220: http://www.pa.msu.edu/courses/ISP220/ > ISP213H: http://www.pa.msu.edu/courses/2007spring/ISP213H/ > Facebook: http://msu.facebook.com/profile.php?id=2312233 > > > > > > > > > > ------------------------------ > > Use REPLY-ALL to reply to list > > To unsubscribe from the SNOWMASS-EF list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=SNOWMASS-EF&A=1 > > > > ------------------------------ > > Use REPLY-ALL to reply to list > > To unsubscribe from the SNOWMASS-EF list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=SNOWMASS-EF&A=1 > > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the SNOWMASS-EF list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=SNOWMASS-EF&A=1