2009/04/23 by M. Diwan, Milind V. Diwan, Diwan, Milind V.
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Neutrino Physics Research #hep-ex
paper · pdf · doi:10.48550/arxiv.0904.3706
This was prepared for the proceedings of the XIII International Workshop on Neutrino Telescopes at the Istituto Veneto di Scienze, Lettere ed Arti in Venice, Italy held on March 10-13, 2009. The presentation was on behalf of the MINOS collaboration
arxiv created 2009/04/23 · openalex publication_date 2009/04/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
MINOS is an accelerator neutrino oscillation experiment at Fermilab. An intense high energy neutrino beam is produced at Fermilab and sent to a near detector on the Fermilab site and also to a 5 kTon far detector 735 km away in the Soudan mine in northern Minnesota. The experiment has now had several years of running with millions of events in the near detector and hundreds of events recorded in the far detector. I will report on the recent results from this experiment which include precise measurement of |Δm232|, ~analysis of neutral current data to limit the component of sterile neutrinos, and the search for νμ→ νe conversion. The focus will be on the analysis of data for νμ→ νe conversion. Using data from an exposure of 3.14× 1020 protons on target, we have selected electron type events in both the near and the far detector. The near detector is used to measure the background which is extrapolated to the far detector. We have found 35 events in the signal region with a background expectation of 27± 5(stat)± 2(syst). Using this observation we set a 90% C.L. limit of sin2 2 θ13 < 0.29 for δcp = 0 and normal mass hierarchy. Further analysis is under way to reduce backgrounds and improve sensitivity.