Subject: Minutes of last meeting, Some info on Snowmass, and time of the next meeting 1. Minutes of DMWG meeting of Monday, May 14, 2001. An update from Aldo of DM happenings at Rome2 - Piero was at Rome for three days. 6 lectures on DM to students and other interested parties. He discussed his recent paper. The preprint number is hep-ph/0105052. I include the ps file. The theoretical motivations are in hep-th/9810155 and hep-ph/9810442; phenomenology at accelerators is in hep-ph/9904378 and hep-ph/9904378 (Jim Wells is in the latter as well as in the paper on direct detection of this model hep-ph/0011082). We discussed interests of various participants and what they hope to work on over the next months in the DMWG: Aldo _We are trying to calculate the gamma rays flux within the theoretical framework of the MSSM with an anomaly mediated supersymmetry breaking. The calculation is performed using the program DarkSusy. We are thinking about some smart method (our wish is to have some algorithm valid for a broad class of models) to discriminate the detectability of this flux with respect to the background. Naively we are going to reject every model whose calculated flux curve "distance", for every single bin of energy (typically of the order of the energy resolution), is under 3 sigma deviations from the expected background flux curve. The concept of "distance" is implemented by some sort of minimal squares method. This work is done with two Ph.D. students that want to give their thesis on Super symmetric Dark Matter Observation with Space Experiments and they have already begun to work on the DarkSusy program and also they are exploring other possibilities like the programs in use at LEP. Their names are :Andrea Lionetto and Alessandro Cesarini Lars - looking for WIMPS from all galaxies. General energy - acceptance parameters. Regis Terrier from Sap - CEA Saclay and PCC - College de France - energy resolution algorithms. SLAC - Multi-hadron annihilation products of WIMPS and observability of this signal, plus searching for other types of DM signals. Steve Ritz would like us to do MC studies of how the Cal high energy trigger threshold impact our science, e.g.., side entering gammas. With thick radiators these events only add marginally to the total effective area of GLAST. However, they may be a much more important impact on the effective area of very good resolution gamma events (likely with a large e- background). These latter events will have entry angles of > 50 degrees or so. Note added to minutes: Peter Michelson recently (5-23-01) gave a talk to a HEPAP subpanel considering the future of Particle Physics in the U.S. Steve and I helped him prepare parts of his talk, and we all felt uncomfortable with the lack of up-to-date estimates of the contribution that GLAST will make in the search for SUSY. The Chair of the Subpanel, Barrie Barish of CIT, has asked us in the past to show what part of SUSY phase space will GLAST rule out compared to other concurrent experiments. The WIMP sensitivity plot in the proposal answered part of this question, as it shows what part of MSSM phase space we will exclude. However, no comparison to other experiments that will be running in the GLAST era were made, e.g., the LHC. Do we make a unique contribution, or will other experiments also cover the same phase space? It would be useful for our working group to produce such a plot. Any volunteers? 2. Some more info on DM activities at Snowmass. Below I have copied a email I received from Paolo Gondolo, one of the Snowmass DM working group Co-Conveners. Please read it to find out what is happening at Snowmass. It would be useful if members of this group could participate at Snowmass. Eduardo and I will be there. I will be there for the last two weeks of the meeting. Snowmass 2001: Working Group on Astro/Cosmo/Particle Physics Topical Sessions on Dark Matter and Relic Particles June 30--July 21 Workshop web page http://www.snowmass2001.org Working group web page http://pancake.uchicago.edu/~snowmass2001 Dear Dark Matter Colleague, This summer in Snowmass we will be convening topical sessions on "Dark matter and relic particles" as part of the "Working Group on Astro/Cosmo/Particle Physics". The basic charge for the working group is to broadly define and review astro/cosmo/particle physics, to examine its connections to, and ramifications for, particle physics, and to consider a vision for future research in the field. The workshop is an opportunity to influence the future of cosmology, astrophysics, and particle physics. (The general invitation to the working group on "Astro/Cosmo/Particle Physics" is attached to this message.) The ultimate outcome of our topical sessions is to produce a 15 to 20 page document that will outline the current status of research in our field and will present some of the more promising directions for its future. Hence we want our topical sessions to be a true workshop, with short presentations followed by extensive informal discussions in smaller or larger working groups. We encourage your participation, as this is an opportunity for you to contribute with the topics that you consider most important for the future of dark matter and relic particle searches and theory. Topics that have come to our mind are: A. Supersymmetry reach of present/future WIMP detection efforts B. Dark matter candidates and structure of dark halos B. Axions C. Baryonic dark matter D. Primordial black holes F. Modified gravity G. Monopoles and other relics Please let us know if there is anything else that you think is worth including. Our topical sessions are closely related to other topical sessions in the "Astro/Cosmo/Particle Physics" working group, such as for example "Gamma-rays and X-rays", "Structure formation and cosmological parameters", "Cosmic rays", and "Neutrinos". We will coordinate our discussions with those of the other topical sessions. Given the informal structure and the various type of connections, participants may consider presenting and discussing their interests in multiple forums. Another group in the workshop is closely related to our P4 group on "Astro/Cosmo/Particle Physics". It is the E6 group on "Astro/Cosmo/Particle Experiments". The workshop is scheduled so that participants may attend both groups. We have not yet worked out how to divide the considerable overlap between the two groups, but broadly speaking our group is more concerned with the general issues, while technical and experimental matters are handled by the other group (if interested you may want to contact one of the E6 conveners: Kevin Lesko ktlesko@lbl.gov, Tim McKay tamckay$umich.edu, Suzanne Staggs staggs@pupgg.princeton.edu, and Harry Nelson hnn@charm.physics.ucsb.edu). More information regarding the schedule, registration, accommodations, and other sessions is available at the websites http://www.snowmass2001.org and http://pancake.uchicago.edu/~snowmass2001. Note that the registration deadline for Snowmass 2001 is May 23, 2001. We hope that you will be able to attend, for all or part of the three-week workshop. If you do plan on coming, please let us know in which topics you are particularly interested. Please forward this email to anyone who you think might be interested in attending the workshop. If you have any question, feel free to contact us. Co-Conveners Snowmass Dark Matter Working Group Steve Asztalos (asztalos1@llnl.gov) Paolo Gondolo (paolo@mamma-mia.phys.cwru.edu) Will Kinney (kinney@physics.columbia.edu) Richard Schnee (rxs33@po.cwru.edu) 3. Time of the next meeting. Due to a number of factors, including the HEPAP meeting at SLAC this week, the last stages of preparations of the GLAST balloon payload at SLAC before shipment to Goddard for integration with the balloon gondola, and the U.S. holiday next Monday, I am canceling the meeting next Monday. I suggest we meet again on the same two week schedule on Monday June 11, 2001. I will be contacting you via email over the next two weeks to establish the agenda for the next meeting. Regards, Elliott ____________________________________________________________ Elliott D. Bloom                                 Voice: 650-926-2469 Particle Astrophysics, Group K         FAX:  650-926-4335 MS-98, SLAC, Stanford University        Stanford, CA 94309 emailto: elliott@slac.stanford.edu