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G-2 Experiment
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first tau-neutrino “appearing” out of several billion of billions muon neutrinos
Layout of the CNGS beam line. The OPERA neutrino experiment [1] at the underground Gran Sasso Laboratory (LNGS) was designed to perform the first detection of neutrino oscillations in direct appearance mode in the νμ→ντ channel, the signature being the identification of the τ− lepton created by its charged current (CC) interaction [2]. See: Measurement…
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Energy Boost From Shock Front
Main Components of CNGS A 400 GeV/c proton beam is extracted from the SPS in 10.5 microsecond short pulses of 2.4×1013 protons per pulse. The proton beam is transported through the transfer line TT41 to the CNGS target T40. The target consists of a series of graphite rods, which are cooled by a recirculated helium…
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Gran Sasso and Fermilab
Gran Sasso *** deconstruction: soudan mural The Soudan mural is next to the 6000-ton MINOS detector. Mural artists: Joseph Giannetti, Leila Giannetti, Mick Pulsifer. Funded by a grant from the University of Minnesota. (Credit: Fermilab Visual Media Services) *** Fermilab experiment weighs in on neutrino mystery Scientists of the MINOS experiment at the Department of…
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XKCD Significant-Speed of Light Issue?
You got to love it when correlations can be made, and a thank you to the ICECUBE Blog If the histograms and data are exactly right, the paper quotes a one-in-ten-thousand (0.0001) chance that this bump is a fluke. That’s pretty small; although bear in mind that lots of distributions like this get plotted. If…
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ICECUBE Blogging Research Material and more
In regards to Cherenkov Light Thinking outside the box See: A physicist inthe cancer lab Ackerman became interested in physics in middle school, reading popular science books about quantum mechanics and string theory. As an undergraduate at the Massachusetts Institute of Technology, she traveled to CERN, the European particle physics laboratory near Geneva, to work…
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P.I. Chats: Faster-than-light neutrinos?
Measurements by GPS confirm that the neutrinos identified by the Super-Kamiokande detector were indeed produced on the east coast of Japan. The physicists therefore estimate that the results obtained point to a 99.3% probability that electron neutrino appearance was detected.Neutrino Oscillations Caught in the Act The Gran Sasso National Laboratory (LNGS) is one of four…
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Cassiopeia A
In conclusion, we have a rich panorama of experiments that all make use of neutrinos as probes of exotic phenomena as well as processes which we have to measure better to gain understanding of fundamental physics as well as gather information about the universe. See:Vernon Barger: perspectives on neutrino physics May 22, 2008 This image…
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Measurement of the neutrino velocity with the OPERA detector in the CNGS beam
We know already why the neutrinos could go faster and what new experiments this suggests, why it does not imply time travel or violates causality, and why it is somewhat expected for neutrinos. Now let us focus on what kind of superluminal velocity is indicated.See:A Million Times The Speed Of Light Measurement of the neutrino…
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Relativistic Time Dilation in Muon Decay
According to Einstein’s special theory of relativity, a clock moving at a significant fraction of the speed of light with respect to an observer runs more slowly than the observer’s own clock. This implies that time must be flowing more slowly in a moving frame of reference, which is referred to as time dilation. If…
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Measurement of the neutrino velocity with the OPERA detector
Scanning results tau decays New results from OPERA on neutrino propertieslive from Main Amphitheatre. “This result comes as a complete surprise,” said OPERA spokesperson, Antonio Ereditato of the University of Bern. “After many months of studies and cross checks we have not found any instrumental effect that could explain the result of the measurement. While…
