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Observation of muon neutrino disappearance with the MINOS detectors and the NuMI neutrino beam

Journal Article · · Phys.Rev.Lett.97:191801,2006
This letter reports results from the MINOS experiment based on its initial exposure to neutrinos from the Fermilab NuMI beam. The rates and energy spectra of charged current {nu}{sub {mu}} interactions are compared in two detectors located along the beam axis at distances of 1 km and 735 km. With 1.27 x 10{sup 20} 120GeV protons incident on the NuMI target, 215 events with energies below 30GeV are observed at the Far Detector, compared to an expectation of 336 {+-} 14.4 events. The data are consistent with {nu}{sub {mu}} disappearance via oscillations with |{Delta}m{sub 32}{sup 2}| = 2.74{sub -0.26}{sup +0.44} x 10{sup -3} eV{sup 2}/c{sup 4} and sin{sup 2} (2{theta}{sub 23}) > 0.87 (68% C.L.).
Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL
Sponsoring Organization:
USDOE
DOE Contract Number:
AC02-76CH03000
OSTI ID:
892498
Report Number(s):
FERMILAB-PUB-06-243; arXiv eprint number hep-ex/0607088
Journal Information:
Phys.Rev.Lett.97:191801,2006, Journal Name: Phys.Rev.Lett.97:191801,2006 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
Country of Publication:
United States
Language:
English

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