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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/ >>> >>> --------------------------------------------------------------------------------------------- >>> >>> ######################################################################## >>> >>> 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 >> > > ---------------------------------------------------------- > Heather E. Logan http://www.physics.carleton.ca/~logan > Department of Physics, Carleton University, Ottawa, Canada > > ######################################################################## > 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