 | Thursday, March 2, 2006 |
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Thursday, March 2
Friday, March 3 |
 Chance of Snow 37º/25º
Extended Forecast |
Secon Level 3 |
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Thursday, March 2 -Santa Fe Black Bean -Sloppy Joe -Stuffed Peppers -Sauteed Liver & Onions -Baked Ham & Swiss on a Ciabatta Roll -California Pizza -Crispy Fried Chicken Ranch Salad |
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Thursday, March 2
Wednesday, March 8
Chez Leon Menu |
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Kestrels Can Soon Call
Fermilab Even Nicer Home
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The American Kestrel, one of the most common raptors found in North America,
Kestrels are currently known to nest onsite in several locales, mainly under the eves of buildings. Local residents Bob Mathieu and Evalyn Campbell, who were already volunteering with Accelerator Division building manager Bill Wickenberg to help maintain the lab's 50 bluebird nest boxes, soon took notice of these colorful raptors. Mathieu asked if kestrel nest boxes could be put up at the lab as well, and over the winter, built several of them. Wickenberg and the volunteers have been careful to choose nest box locations away from where current kestrel nests exist, to avoid disturbing the birds.
The volunteers have already installed one kestrel nest box and installation of the others is in progress. "It's a slow process," explains Wickenberg. While scouting potential sites for boxes, they also must keep in mind things like the fall prairie burn schedules and possible kestrel territorial ranges. Nonetheless, the volunteers are optimistic about providing the new nest boxes. "My family moved to Warrenville in 1935, when it was 300 people, and this was all farmland," says Mathieu. He recalls seeing kestrels, mockingbirds, bluebirds, red-tailed hawks, and Cooper's hawks, in the area. "As far as kestrels interfering with or eating other birds, I've never seen them do it," he says. "Their main diet is mice and insects."
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The Future of Digital Data
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Over the last few decades, advances in
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Interactions.org, February 28, 2006: Marburger, Bement, Orbach to address High Energy Physics Advisory Panel Friday, March 3, in Washington Chicago—Science Advisor to the President and Office of Science and Technology Director John H. Marburger; National Science Foundation Director Arden L. Bement; and Department of Energy Office of Science Director Raymond L. Orbach will all address a meeting of the DOE/NSF High Energy Physics Advisory Panel on Friday morning, March 3, at the Latham Hotel, 3000 M Street, Washington DC.
The March 3 HEPAP meeting is the Panel’s first under incoming Chair Melvyn J. Shochet, professor of physics at the University of Chicago, and with a new HEPAP membership.
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| A novel search for long-lived new particles with DZero | |||
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Many of the greatest advancements in our understanding of particle
physics have come from unexpected discoveries of new particles. For
this reason experiments at Fermilab often look for the
unknown. The DZero experiment has recently expanded its abilities
by looking for low-mass, neutral, long-lived particles decaying to two muons. Such particles could be signals for supersymmetry and also possibly explain an intriguing, unexplained, and similar signal from NuTeV.
To search for long-lived particles, DZero fits pairs of muons to a common vertex (assumed to be the decay position of a hypothetical particle) and measures the distance from the point of the primary interaction. This separation is a measure of a particle's lifetime. Previous analyses used decays which have millimeter separation, while for this analysis, we search for decays at least 5 centimeters away from the primary interaction. The "K-short" meson is an example of an already known low-mass particle with long lifetime that decays within the detector to two pions. By studying K-short mesons we demonstrated our ability to reconstruct neutral particle decays at centimeter displacement.
DZero finds no muon pair events with a vertex in the search region. This result is consistent with background expectations. Together
DZero and NuTeV rule out at least one explanation of the NuTeV excess as a signal of supersymmetry.
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| Result of the Week Archive
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Particle Physics Workshop,
Bike to Work
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