Observation of muon neutrino disappearance with the MINOS detectors in the NuMI neutrino beam.


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(mu) interactions are compared in two detectors located along the beam axis at distances of 1 and 735 km. With 1.27 x 10(20) 120 GeV protons incident on the NuMI target, 215 events with energies below 30 GeV are observed at the Far Detector, compared to an expectation of 336+/-14 events. The data are consistent with nu(mu) disappearance via oscillations with |Delta(m)2/32|=2.74 +0.44/-0.26 x10(-3)eV(2) and sin(2)(2theta(23))>0.87 (68% C.L.).

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@article{Michael2006ObservationOM, title={Observation of muon neutrino disappearance with the MINOS detectors in the NuMI neutrino beam.}, author={D . G . Michael and Penelope Adamson and T . Alexopoulos and W . W . M . Allison and G . J . Alner and K C Anderson and C . Andreopoulos and Meghan Andrews and Richard V Andrews and K. E. Arms and Ruth Armstrong and Carolina Arroyo and David Auty and S . Avvakumov and D . S . Ayres and B . R . Baller and Barry C. Barish and Matthew A. Barker and Patrick Barnes and G . D . Barr and Wayne Barrett and Edward P. Beall and Bryan Becker and A. Belias and Tanja Bergfeld and Ran Bernstein and Deep Bhattacharya and M . Bishai and Allan D. Blake and V. Bocean and Beth C Bock and Gregory J. Bock and Julian Boehm and Dominik B{\"{o}hnlein and D. Bogert and Peter Border and Carol Bower and Stephen Boyd and Elizabeth Buckley-Geer and Cristian Bungau and A. Byon-Wagner and Alberto Cabrera and J Donald Chapman and Thomas R. Chase and D . Cherdack and S . K . Chernichenko and Stephen Childress and Brajesh Chandra Choudhary and Jannine H Cobb and J. Donald Cossairt and H . Courant and Daniel A. Crane and A. J. Culling and James W Dawson and J K de Jong and Daniel Demuth and Annunziata De Santo and Mark Dierckxsens and Milind V. Diwan and Michael Dorman and G Drake and Drakoulis Drakoulakos and R. J. Ducar and Taylor Durkin and Albert R. Erwin and Carlos O. Escobar and James Evans and O. D. Fackler and E Falk Harris and Gary J. Feldman and Nicholas Felt and T . H . Fields and Rupert Ford and M. V. Frohne and Herbert Gallagher and Mark C Gebhard and Gavril Giurgiu and Andrew Godley and J. Gogos and M. Goodman and Y . A . Gornushkin and P . Gouffon and Richard Gran and E. W. Grashorn and Neal Grossman and Jacek Grudziński and Karolina Grzelak and Vincenzo Guarino and Alec Habig and Robert Halsall and John S . Hanson and Daren W Harris and Paul G. Harris and J . Hartnell and Edward P. Hartouni and Raymond E. Hatcher and K . J . Heller and N. P. R. Hill and Y P Ho and A. Holin and Chris Howcroft and Jan Hyl{\'e}n and Maxim Ignatenko and Dharma Indurthy and George M. Irwin and Misaki Ishitsuka and Dr. Ewald Jaffe and Cynthia H . James and Lasse Bohl Jenner and Dwayne Jensen and T. Joffe-Minor and Tina Kafka and H J Kang and Sho Kasahara and John Kilmer and H Kim and M S Kim and Go Koizumi and Sacha E. Kopp and Michael Kordosky and D. Jason Koskinen and Mykola Kostin and S . K . Kotelnikov and Daniel A Krakauer and A . E . Kreymer and S . Kumaratunga and A S Ladran and Katherine M . Lang and Carrie M Laughton and A . I . Lebedev and Randall G. Lee and W Y Lee and Marcus Libkind and J . J . Ling and J Liu and P . J . Litchfield and R . P . Litchfield and N . P . Longley and Peter C. Lucas and Wolfgang L{\"{u}bke and Shabnam Madani and E Maher and Vsevolod Makeev and W . Anthony Mann and Alberto Marchionni and Antonio Di Marino and Marik Marshak and Jeffrey S. Marshall and Norbert Mayer and John G . McDonald and A. M. McGowan and John R Meier and G . I . Merzon and Matt Messier and Richard H. Milburn and Jonathan L Miller and W. H. Miller and Sridhar Mishra and A. Mislivec and P. S. Miyagawa and Candace D Moore and Jorge Morfin and Richard Morse and Liran Mualem and S . Mufson and Saverio Murgia and Madeleine Murtagh and Joe Musser and D . Naples and Craig S. Nelson and Jenny Nelson and Harvey B. Newman and F . Nezrick and Ryan J O Nichol and Timothy Christopher Nicholls and J. P. Ochoa-Ricoux and Jos{\'e} Mar{\'i}a Oliver and W . P . Oliver and V . A . Onuchin and Tom Osiecki and Rustem Ospanov and J . M . Paley and V . Paolone and Adam Para and Thomas Patzak and Zivko Pavlovi{\'c} and Geoffrey Pearce and Nicola Pearson and Charlie Peck and Christopher Perry and Elbert A. Peterson and D . A . Petyt and H . W . Ping and R. Piteira and R. Pittam and Anna Pla-Dalmau and Robert K Plunkett and L . E . Price and Marek Proga and D R Pushka and Dinah Rahman and R. A. Rameika and Tobias M. Raufer and Alexander L. Read and Brian Rebel and J . Reichenbacher and David E. Reyna and Cheryl S Rosenfeld and Hillel Rubin and Kevin Ruddick and Vasily Ryabov and R . R . Saakyan and Ma Concepci{\'o}n S{\'a}nchez and Niki Saoulidou and J . Schneps and P. V. Schoessow and Pamela J. Schreiner and Reinhard Schwienhorst and Vyacheslav Semenov and S-M Seun and Peter Shanahan and P . D . Shield and Wilson Smart and V. Smirnitsky and Courtland L . Smith and P. N. Smith and Aminadabe B . de Sousa and B . Speakman and P . Stamoulis and Andrej Stef{\'a}nik and Patrick F Sullivan and Jeffrey M. Swan and Philip Symes and Nathaniel Tagg and R. L. Talaga and Alexey Terekhov and Edward Tetteh-Lartey and James Thomas and J. M. Thompson and M. A. Thomson and J . L . Thron and Gemma Tinti and Robert Trendler and Jason Trevor and I. Trostin and V. A. Tsarev and G . Tzanakos and Jon Urheim and P. Vahle and Mahshad Vakili and Kamran Vaziri and Christos Velissaris and V . S . Verebryusov and Brett Viren and Lawrence Wai and C . P . Ward and D . R . Ward and Mizuki Watabe and Andr{\'e}e M Weber and Robert Clinton Webb and A. Wehmann and Nathanael West and Carl White and Roberta F. White and Stanley G. Wojcicki and D. M. Wright and Quoc K Wu and Wang Guang Yan and T Yang and F . X . Yumiceva and J. C. Yun and Haoqiang Zheng and Michael Zois and R . Zwaska}, journal={Physical review letters}, year={2006}, volume={97 19}, pages={191801} }