[Triumf-seminars] TRIUMF Colloquium today at 14:00

TRIUMF Seminars triumf-seminars at lists.triumf.ca
Thu Aug 18 05:00:03 PDT 2011


Date/Time: Thu 2011-08-18 at 14:00

Location:  Auditorium          

Speaker:   Kendall Mahn (TRIUMF)

Title:     New Results from the T2K long baseline neutrino experiment

Abstract: Neutrino oscillations have been observed and confirmed at two mass splittings (Delta m^2), which is consistent with three generations of neutrinos and an unitary mixing matrix. Despite the rapid progress in understanding neutrino oscillations in the last decade, two large questions remain about neutrino oscillation parameters at  Delta m^2(23) ~ 10^-3 eV^2. Is theta(23) exactly 45 degrees or not, indicating an additional symmetry in neutrino mixing? Is theta(13) non-zero? If theta(13) is large enough, then a programme to study CP violation with neutrinos is possible, such as a second phase of T2K or the proposed Long Baseline Neutrino experiment in the US (LBNE).

The Tokai-To-Kamioka (T2K) long baseline neutrino experiment is designed to precisely measure muon neutrino (nu(mu)) disappearance (Delta m^2(23)),  theta(23)) and search for electron neutrino appearance (nu(e)) appearance (theta(13)). A beam of muon neutrinos is generated at the J-PARC facility in Tokai-mura, Japan, and is sampled by two near detectors, ND280 and INGRID, before reaching the Super-Kamiokande detector, 295km away. This seminar will report new results from T2K on nu(mu) disappearance and updated nu(e) appearance with the entire dataset (1.43e20 protons on target, at 15.5 kW for 10^7 s) taken prior to the March 11th earthquake. Future prospects for T2K and long baseline neutrino physics will also be discussed.

Stimulants will be available 15 minutes before the presentation.

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