Message-ID: <41ADE133.3040900@neutrino.kek.jp> Date: Thu, 02 Dec 2004 00:20:19 +0900 From: koichiro Nishikawa <nishikaw@neutrino.kek.jp> Subject: [Fwd: November 2004 long-baseline neutrino news] -------- Original Message -------- Subject: November 2004 long-baseline neutrino news Date: Tue, 30 Nov 2004 20:58:46 -0600 From: Maury Goodman at Argonne <mcg@hep.anl.gov> To: LONGBNEWS@FNAL.GOV CC: MCG@hep.anl.gov Long-Baseline Neutrino News November 2004 *** First 400 NuMI/MINOS pulses coming soon More than half of NuMI's primary beam components are in the Main Injector/Recycler tunnel interlock system, where access opportunities will be very restrictive once intense beam starts. Final efforts are still ongoing in the NuMI Target Hall, so beam tests will be limited. NuMI will run in a target out mode starting 3-Dec, looking to transport the primary beam to the hadron absorber, with an intensity of a few E11 protons/pulse. It will run for several shifts during the first two weekends of December using a repetition rate < 1 pulse/3 minutes. *** Delta M-squared 32 goes up The latest best fit for the square of the mass difference from K2K is 2.8 x 10**-3 eV**2 with an uncertainty +0.4, -0.7. (see hep-ex/0411038). This is good news for other long baseline experiments, such as MINOS, CNGS and Double-CHOOZ, compared to the previous best fit at 2.0. *** K2K horn fails; it might be the end of the run K2K is the long-baseline experiment from KEK to Super-Kamiokande in Japan. Their statement is "During the recent K2K data taking run, we experienced an apparent horn failure. At this moment, we do not know the cause and the extent of the damage due to high radiation near horn. We will soon make a decision on what we should do." K2K Collaboration *** APS Neutrino Study Context The APS neutrino study report (http://www.aps.org/neutrino) made three recommendations in the context of certain assumptions about the groundwork for the new experimental program. The assumptions include: *) Continuation and strong support of the existing program. *) Underground laboratory facilities. *) Determination of the neutrino reaction and production cross sections required for a precise understanding of neutrino-oscillation physics and the neutrino astronomy of astrophysical and cosmological sources. *) Research and development to assure the practical and timely realization of accelerator and detector technologies critical to the recommended program. *) International cooperation. Of particular interest are R&D efforts aimed toward development of a high-intensity proton driver, a neutrino factory, a very large neutrino detector, and techniques for detection of UHE nus. *** Fermilab gets Potentially the Premier Peruvian Lab Director Pier Oddone will be the new Director. In a message to the FNAL community, he says: "The laboratory is poised for a future that includes the premier experiment in flavor physics, potentially the premier program in neutrino physics, and strong participation in the LHC as it takes over the lead at the energy frontier." *** How much does a pound of neutrinos weigh in California? Physicists planning a theta_13 experiment at the Diablo Canyon Nuclear Power plant originally had good cooperation from the power plant operators, PG&E, but for whatever reason, the company changed its mind. Articles critical of the company's decision recently appeared in 15-Nov LA Times and in San Francisco: http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2004/11/01/MNG909JOI41.DTL One quote to think about, "At one time, neutrinos were thought to be massless. It is now known they do have mass, but not in the sense that a kilogram of shrimp weighs 2.2 pounds." *** R2D2 Its not Star Wars, and its not a robot. Its the latest idea for measuring theta_13 at a nuclear reactor. You need two or more reactors about a kilometer apart, so only Daya Bay and Kashiwazaki are the obvious candidates. hep-ph/0411166 *** BENE workshop considers neutrinos in Europe The Coordinated Accelerator Research in Europe meeting considered neutrino physics, among others. www-mhf.desy.de/public/care04/ One view of the situation is that the LHC plus linear collider plans are eating up too much of the resources. The CERN management has recently made statements which do not exclude (as before) a neutrino future at CERN and some people consider this very encouraging. However skepticism is warranted since CERN will be busy with LHC for a number of years. DESY is pushing towards a LC and doesn't seem to some to have a plan B. *** Totsuka wins award Prof. Yoji Totsuka was awarded the Order of Culture, Japan's most prestigious honor in the fields of culture and science. http://www.kek.jp/ja/news/topics/2004/bunkakunsyo.html (Japanese) *** ARENA workshop on EEV neutrinos May 17-19 at DESY Zeuthen The workshop will focus on high-E nus using radio or acoustic signals. ARENA stands for "Acoustic and Radio EeV Neutrino detection Activities." http://www-zeuthen.desy.de/arena/ *** Is the neutrino the dark energy? The fourth root of the cosmological constant is about the average neutrino mass. Peccei considers a scenario proposed by Fardon, Nelson and Weiner where these facts are connected in "Neutrino Models of Dark Energy" hep-ph/0411137. Also hep-th/0411188 *** Notable New References (- web page at bottom for links) <-> M. Whalley, "A New Nu Cross Section Database", hep-ph/0410399 <-> Ota & Sato, "Lepton Flavor Violation in a Long-Baseline Experiment", hep-ph/0410408 <-> A Silvestri et al, "Status of ANITA & =lite" astro-ph/0411007 <-> A. Kopylov, "About the sign of delta m^2-12" hep-ph/0411031 <-> R. Mohapatra, "Physics of Neutrino Mass" hep-ph/0411131 review <-> A. Joshipura, "Summary of predictions for Ue3" hep-ph/0411154 <-> R. Gandhi et al., "Earth Matter Effects at Very Long Baselines and the Neutrino Mass Hierarchy", hep-ph/0411252 <-> W. Winter, "Direct test of the MSW effect by the solar appearance term in beam experiments", hep-ph/0411309 ****************************************************************** http://www.hep.anl.gov/ndk/longbnews/ maury.goodman@anl.gov
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