Format

Send to

Choose Destination
Phys Rev Lett. 2016 Apr 15;116(15):151806. doi: 10.1103/PhysRevLett.116.151806. Epub 2016 Apr 13.

First Measurement of Electron Neutrino Appearance in NOvA.

Adamson P1, Ader C1, Andrews M1, Anfimov N2, Anghel I3,4, Arms K5, Arrieta-Diaz E6, Aurisano A7, Ayres DS3, Backhouse C8, Baird M9, Bambah BA10, Bays K8, Bernstein R1, Betancourt M5, Bhatnagar V11, Bhuyan B12, Bian J5, Biery K1, Blackburn T13, Bocean V1, Bogert D1, Bolshakova A2, Bowden M1, Bower C9, Broemmelsiek D1, Bromberg C14, Brunetti G1, Bu X1, Butkevich A15, Capista D1, Catano-Mur E4, Chase TR5, Childress S1, Choudhary BC16, Chowdhury B17, Coan TE6, Coelho JA18, Colo M19, Cooper J1, Corwin L20, Cronin-Hennessy D5, Cunningham A21, Davies GS9, Davies JP13, Del Tutto M1, Derwent PF1, Deepthi KN10, Demuth D22, Desai S5, Deuerling G1, Devan A19, Dey J1, Dharmapalan R3, Ding P1, Dixon S1, Djurcic Z3, Dukes EC23, Duyang H17, Ehrlich R23, Feldman GJ24, Felt N24, Fenyves EJ21, Flumerfelt E25, Foulkes S1, Frank MJ23, Freeman W1, Gabrielyan M5, Gallagher HR18, Gebhard M9, Ghosh T26, Gilbert W5, Giri A27, Goadhouse S23, Gomes RA26, Goodenough L3, Goodman MC3, Grichine V28, Grossman N1, Group R23, Grudzinski J3, Guarino V3, Guo B17, Habig A29, Handler T25, Hartnell J13, Hatcher R1, Hatzikoutelis A25, Heller K5, Howcroft C8, Huang J30, Huang X3, Hylen J1, Ishitsuka M9, Jediny F31, Jensen C1, Jensen D1, Johnson C9, Jostlein H1, Kafka GK24, Kamyshkov Y25, Kasahara SM5, Kasetti S10, Kephart K1, Koizumi G1, Kotelnikov S28, Kourbanis I1, Krahn Z5, Kravtsov V6, Kreymer A1, Kulenberg Ch2, Kumar A11, Kutnink T4, Kwarciancy R1, Kwong J5, Lang K30, Lee A1, Lee WM1, Lee K32, Lein S5, Liu J19, Lokajicek M33, Lozier J8, Lu Q1, Lucas P1, Luchuk S15, Lukens P1, Lukhanin G1, Magill S3, Maan K11, Mann WA18, Marshak ML5, Martens M1, Martincik J31, Mason P25, Matera K1, Mathis M19, Matveev V15, Mayer N18, McCluskey E1, Mehdiyev R30, Merritt H9, Messier MD9, Meyer H34, Miao T1, Michael D8, Mikheyev SP15, Miller WH5, Mishra SR17, Mohanta R10, Moren A29, Mualem L8, Muether M34, Mufson S9, Musser J9, Newman HB8, Nelson JK19, Niner E9, Norman A1, Nowak J5, Oksuzian Y23, Olshevskiy A2, Oliver J24, Olson T18, Paley J1, Pandey P16, Para A1, Patterson RB8, Pawloski G5, Pearson N5, Perevalov D1, Pershey D8, Peterson E5, Petti R17, Phan-Budd S35, Piccoli L1, Pla-Dalmau A1, Plunkett RK1, Poling R5, Potukuchi B36, Psihas F9, Pushka D1, Qiu X37, Raddatz N5, Radovic A19, Rameika RA1, Ray R1, Rebel B1, Rechenmacher R1, Reed B20, Reilly R1, Rocco D5, Rodkin D15, Ruddick K5, Rusack R5, Ryabov V28, Sachdev K5, Sahijpal S11, Sahoo H3, Samoylov O2, Sanchez MC3,4, Saoulidou N1, Schlabach P1, Schneps J18, Schroeter R24, Sepulveda-Quiroz J3,4, Shanahan P1, Sherwood B5, Sheshukov A2, Singh J11, Singh V38, Smith A5, Smith D20, Smolik J31, Solomey N34, Sotnikov A2, Sousa A7, Soustruznik K39, Stenkin Y15, Strait M5, Suter L3, Talaga RL3, Tamsett MC13, Tariq S1, Tas P39, Tesarek RJ1, Thayyullathil RB40, Thomsen K29, Tian X17, Tognini SC26, Toner R24, Trevor J8, Tzanakos G41, Urheim J9, Vahle P19, Valerio L1, Vinton L13, Vrba T31, Waldron AV13, Wang B6, Wang Z23, Weber A42,43, Wehmann A1, Whittington D9, Wilcer N1, Wildberger R5, Wildman D1, Williams K1, Wojcicki SG37, Wood K3, Xiao M1, Xin T4, Yadav N12, Yang S7, Zadorozhnyy S15, Zalesak J33, Zamorano B13, Zhao A3, Zirnstein J5, Zwaska R1; NOvA Collaboration.

Author information

1
Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
2
Joint Institute for Nuclear Research Joliot-Curie, 6 Dubna, Moscow Region 141980, Russia.
3
Argonne National Laboratory, Argonne, Illinois 60439, USA.
4
Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA.
5
School of Physics and Astronomy, University of Minnesota-Twin Cities, Minneapolis, Minnesota 55455, USA.
6
Department of Physics, Southern Methodist University, Dallas, Texas 75275, USA.
7
Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA.
8
California Institute of Technology, Pasadena, California 91125, USA.
9
Indiana University, Bloomington, Indiana 47405, USA.
10
School of Physics, University of Hyderabad, Hyderabad 500 046, India.
11
Department of Physics, Panjab University, Chandigarh 106 014, India.
12
Department of Physics, IIT Guwahati, Guwahati 781 039, India.
13
Department of Physics and Astronomy, University of Sussex, Falmer, Brighton BN1 9QH, United Kingdom.
14
Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
15
Institute for Nuclear Research of Russian Academy of Sciences, 7a 60th October Anniversary Prospect, Moscow 117312, Russia.
16
Department of Physics & Astrophysics, University of Delhi, Delhi 110007, India.
17
Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
18
Department of Physics and Astonomy, Tufts University, Medford, Massachusetts 02155, USA.
19
Department of Physics, College of William & Mary, Williamsburg, Virginia 23187, USA.
20
South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA.
21
Physics Department, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75083-0688, USA.
22
Math, Science and Technology Department, University of Minnesota-Crookston, Crookston, Minnesota 56716, USA.
23
Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA.
24
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
25
Department of Physics and Astronomy, University of Tennessee, 1408 Circle Drive, Knoxville, Tennessee 37996, USA.
26
Instituto de Física, Universidade Federal de Goiás, Goiánia, Goiás 74690-900, Brazil.
27
Department of Physics, IIT Hyderabad, Hyderabad 502 205, India.
28
Nuclear Physics Department, Lebedev Physical Institute, Leninsky Prospect 53, 119991 Moscow, Russia.
29
Department of Physics and Astronomy, University of Minnesota-Duluth, Duluth, Minnesota 55812, USA.
30
Department of Physics, University of Texas at Austin, 1 University Station C1600, Austin, Texas 78712, USA.
31
Czech Technical University in Prague, Brehova 7, 115 19 Prague 1, Czech Republic.
32
Physics and Astronomy Department, UCLA, Box 951547, Los Angeles, California 90095-1547, USA.
33
Institute of Physics, Czech Academy of Sciences, Prague, Czech Republic.
34
Physics Division, Wichita State University, 1845 Fairmout Street, Wichita, Kansas 67220, USA.
35
Department of Physics, Winona State University, P.O. Box 5838, Winona, Minnesota 55987, USA.
36
Department of Physics and Electronics, University of Jammu, Jammu Tawi, 180 006 Jammu & Kashmir, India.
37
Department of Physics, Stanford University, Stanford, California 94305, USA.
38
Department of Physics, Banaras Hindu University, Varanasi 221 005, India.
39
Charles University in Prague, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Prague, Czech Republic.
40
Department of Physics, Cochin University of Science and Technology, Kochi 682 022, India.
41
Department of Physics, University of Athens, Athens 15771, Greece.
42
Subdepartment of Particle Physics, University of Oxford, Oxford OX1 3RH, United Kingdom.
43
Rutherford Appleton Laboratory, Science and Technology Facilities Council, Didcot OX11 0QX, United Kingdom.

Abstract

We report results from the first search for ν_{μ}→ν_{e} transitions by the NOvA experiment. In an exposure equivalent to 2.74×10^{20} protons on target in the upgraded NuMI beam at Fermilab, we observe 6 events in the Far Detector, compared to a background expectation of 0.99±0.11(syst) events based on the Near Detector measurement. A secondary analysis observes 11 events with a background of 1.07±0.14(syst). The 3.3σ excess of events observed in the primary analysis disfavors 0.1π<δ_{CP}<0.5π in the inverted mass hierarchy at the 90% C.L.

PMID:
27127961
DOI:
10.1103/PhysRevLett.116.151806
Free full text

Supplemental Content

Full text links

Icon for American Physical Society Icon for eScholarship, California Digital Library, University of California
Loading ...
Support Center