Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector

  title={Measurement of the intrinsic electron neutrino component in the T2K neutrino beam with the ND280 detector},
  author={T. Abe and Jindřich Adam and Hiroaki Aihara and T. Akiri and C. Andreopoulos and Shigeki Aoki and Akitaka Ariga and Tomoko Ariga and Shamil Assylbekov and Dario Autiero and Mauricio Barbi and Gareth J. Barker and Giles David Barr and Matthew Bass and Marcela Batkiewicz and F. Bay and Stephen W. Bentham and Vincenzo Berardi and B. E. Berger and Sophie Berkman and Iain Alexander Bertram and Sampa Bhadra and F. d. M. Blaszczyk and Alain Blondel and Casey Bojechko and Stefania Bordoni and S. B. Boyd and D. Brailsford and Alessandro Bravar and Christopher Bronner and Norman Buchanan and Richard G. Calland and J. Caravaca Rodr'iguez and Susan Cartwright and R. Castillo and M. G. Catanesi and Anselmo Cervera and Daniel Cherdack and Georgios Christodoulou and Alex Clifton and J. P. Coleman and Stephen James Coleman and G. Collazuol and Kevin Thomas Connolly and L. Cremonesi and Anna Maria Dabrowska and Istv{\'a}n Dank{\'o} and R. Das and S. Davis and Patrick de Perio and Gianfranca de Rosa and T. Dealtry and Steve Dennis and Chris Densham and F. di Lodovico and Silvestro di Luise and O. Drapier and T. Duboyski and Kirsty Duffy and Fr{\'e}d{\'e}ric Dufour and Jacques Dumarchez and Steven Dytman and Michał Dziewiecki and Sandrine Emery and Antonio Ereditato and L. Escudero and Alexander Finch and L. Floetotto and Megan Friend and Yoshiaki Fujii and Yoshiyuki Fukuda and A. P. Furmanski and Vyacheslav Galymov and S. G. Giffin and Claudio Giganti and Karin Gilje and Damian Goeldi and Tomasz Golan and J.-J. Gomez-Cadenas and Michel Gonin and Nick Grant and Denis Sergeevich Gudin and David Hadley and A. Haesler and Martin David Haigh and Pip Hamilton and D. Hansen and Takanori Hara and Mark Patrick Hartz and Takehisa Hasegawa and Nicholas C. Hastings and Yoshinari Hayato and Christopher Hearty and Richard Lloyd Helmer and M. Hierholzer and Joshua Hignight and A. Hillairet and Alexander Himmel and Takahiro Hiraki and Seiko Hirota and Jacek Holeczek and S. Horikawa and K. Huang and Atsuko Kondo Ichikawa and Keiko Ieki and M. Ieva and Motoyasu Ikeda and James Imber and Jonathan Insler and T. J. Irvine and Taku Ishida and Takehiko Ishii and S. J. Ives and Eito Iwai and Kiyoshi Iyogi and Alexander Izmaylov and A. Jacob and Blair Jamieson and R. A. Johnson and Jay Hyun Jo and Patrik Jonsson and Chang Kee Jung and M. Kabirnezhad and Asher Kaboth and Takaaki Kajita and Hidekazu Kakuno and Jun Kameda and Yasunori Kanazawa and Douglas L. Karlen and I. I. Karpikov and Edward Kearns and Marat Khabibullin and Alexey N. Khotjantsev and Danuta Kiełczewska and Tatsuya Kikawa and A. Kilinski and J. Y. Kim and John B. Kisiel and Peter Kitching and Takashi Kobayashi and L.Koch and Anezka Kolaceke and Akira Konaka and Laura Lee Kormos and Alexander Korzenev and Kimiaki Koseki and Yusuke Koshio and Igor E. Kreslo and William R. Kropp and Hiroshi Kubo and Yury G. Kudenko and S. Kumaratunga and Robert Kurjata and Thomas Kutter and Justyna Lagoda and Karim Laihem and Iain Lamont and Marco Laveder and M. Lawe and Manuel Lazos and K. P. Lee and Thomas Lindner and C. J. Lister and R. Phillip Litchfield and A. Longhin and Lucio Ludovici and M. S. Yuen Macaire and Lorenzo Magaletti and Kendall Brianna McConnel Mahn and Magdalena Malek and Steven L. Manly and Alysia Marino and Jacques Marteau and J. F. Martin and Tomoyuki Maruyama and Jan Marzec and E. L. Mathie and Viktor Matveev and K. Mavrokoridis and Eddy Mazzucato and M. McCarthy and Neil McCauley and K. S. McFarland and C. Mcgrew and C. J. Metelko and Mauro Mezzetto and P. Mijakowski and C. A. Miller and Akihiro Minamino and O. V. Mineev and Shun'ichi Mine and Andrew D Missert and Makoto Miura and Laura Monfregola and S. Moriyama and Th. A. Mueller and Akira Murakami and Matthew Murdoch and Sebastien Murphy and Jordan Myslik and Takao Nagasaki and Takeshi Nakadaira and Masayuki Nakahata and Takuya Nakai and K. G. Nakamura and Shoei Nakayama and Tsuyoshi Nakaya and Kazuo Nakayoshi and Donna Lynne Naples and C. Nielsen and M. Nirkko and Koichiro Nishikawa and Yuri Nishimura and Helen O'Keeffe and R M Ohta and Kimihiro Okumura and Toru Okusawa and W. Oryszczak and Sean M. Oser and R. A. Owen and Yuichi Oyama and Vittorio Palladino and Vittorio Paolone and D. J. B. Payne and Oleg Perevozchikov and Jonathan Perkin and Yevgeniy Petrov and L. Pickard and E. S. Pinzon Guerra and Ciro Pistillo and Piotr Plonski and Elżbieta Popławska and Boris A. Popov and Magdalena Zofia Posiadała and J-M. Poutissou and R. Poutissou and Paweł Przewłocki and Benjamin Quilain and Emilio Radicioni and Peter Ratoff and Melody Ravonel and Mark Alastair Rayner and Asmita Redij and M. Reeves and Erez Reinherz-Aronis and Fabrice Reti{\`e}re and Arnaud Robert and P. A. Rodrigues and Paul Rojas and Ewa Rondio and Stefan Roth and Andr{\'e} Rubbia and D. Ruterbories and Riccardo Sacco and Ken Sakashita and Federico S'anchez and Fumitaka Sato and Enrico Scantamburlo and Kate Scholberg and Stefan Schoppmann and Jackie Schwehr and M. Scott and Y. Seiya and T. Sekiguchi and Hiroyuki Sekiya and Davide Sgalaberna and Masato Shiozawa and S. Short and Y. Shustrov and P. Sinclair and B. Smith and R. J. E. Smith and Michael Burghard Smy and Jan T. Sobczyk and Henry W. Sobel and Marc Sorel and Luke Southwell and P. Stamoulis and Jochen Steinmann and Benjamin Still and Yusuke Suda and Atsuto Suzuki and Keisuke Suzuki and S. Suzuki and Yu Suzuki and T. Szegłowski and Roman Tacik and Masahiro Tada and S. Takahashi and Atsushi Takeda and Y. Takeuchi and H. K. M. Tanaka and H. A. Tanaka and M. Tanaka and Dennis Terhorst and Ryan Terri and Lee F. Thompson and Alexander Thorley and S. Tobayama and W. H. Toki and Tomonobu Tomura and Yoji Totsuka and C. Touramanis and Toshifumi Tsukamoto and Martin Tzanov and Yoshi Uchida and Keiji Ueno and Antonin Vacheret and Mark Robert Vagins and Georges Vasseur and Tomasz Wachala and Abigail Victoria Waldron and C. W. Walter and David Lee Wark and Morgan O'hagan Wascko and Andreas Weber and R. A. Wendell and R. J. Wilkes and Michael Wilking and Callum Wilkinson and Z. Williamson and J. Richard Wilson and R J Wilson and Taritree Wongjirad and Y. Yamada and K. Yamamoto and Chiaki Yanagisawa and Stanley Yen and Nikolay Yershov and Masashi Yokoyama and T. Yuan and M. Yu and Agnieszka Zalewska and Joanna Zalipska and Laura Zambelli and Krzysztof Zaremba and Marek Ziembicki and Eric D. Zimmerman and Marco Zito and Jakub Żmuda},
  journal={Physical Review D},
The T2K experiment has reported the first observation of the appearance of electron neutrinos in a muon neutrino beam. The main and irreducible background to the appearance signal comes from the presence in the neutrino beam of a small intrinsic component of electron neutrinos originating from muon and kaon decays. In T2K, this component is expected to represent 1.2% of the total neutrino flux. A measurement of this component using the near detector (ND280), located 280 m from the target, is… 
Measuring the electron antineutrino beam component in the ND 280
The main irreducible background in the T2K electron-neutrino appearance analysis is the electron-neutrino contamination in the muon-neutrino beam. In order to quantify this background, a selection
Selection of electron (anti-)neutrinos at the T2K near detector ND280
The intrinsic electron neutrino contamination of the T2K neutrino beam provides the single largest background in the measurement of electron neutrino appearance in T2K. These electron neutrinos can
Analysis of muon and electron neutrino charged current interactions in the T2K near detectors
Abstract We present the updated measurement of the muon neutrino interaction rates and spectrum at the T2K near detector complex, ND280, located at the JPARC accelerator facility in Tokai, Japan, 280
Measurement of the electron neutrino charged-current inclusive cross-section on carbon using the T2K near detector
T2K is a long baseline neutrino oscillation experiment which uses a beam of muon neutrinos to study muon neutrino disappearance and electron neutrino appearance. The measurement of ν e appearance is
Measurement of lead-target neutrino interactions using the whole T2K near detector
This thesis presents a selection of neutrino interactions occurring within the Electromagnetic Calorimeters (ECals) of the T2K off-axis near detector, ND280. ND280 is situated 2.5 off axis with
Muon neutrino charged current quasi-elastic interactions in the T2K off-axis near detector
T2K (Tokai-to-Kamioka) is a long-baseline neutrino oscillation experiment, currently operating in Japan, built to precisely measure the mixing angle θ13, using the electron neutrino appearance
Investigating the differences between electron and muon neutrino interactions using the T2K near detector
The T2K neutrino beam consists mostly of muon neutrinos with a 1$\%$ component of electron neutrinos. In order to maximise the physics potential of T2K and other future neutrino experiments, it is
Long baseline neutrino oscillation experiments with accelerators in Japan
The development of long baseline neutrino oscillation experiments with accelerators in Japan is reviewed. Accelerator experiments can optimize experimental conditions, such as the beam and the
Measurement of the inclusive electron neutrino charged current cross section on carbon with the T2K near detector.
The T2K off-axis near detector ND280 is used to make the first differential cross-section measurements of electron neutrino charged current interactions at energies ∼1  GeV as a function of electron
Neutrino–nucleus cross sections for oscillation experiments
Neutrino oscillations physics is entering an era of high precision. In this context, accelerator-based neutrino experiments need a reduction in systematic errors to the level of a few percent. Today,


Observation of electron neutrino appearance in a muon neutrino beam.
The T2K experiment has observed electron neutrino appearance in a muon neutrinos beam produced 295 km from the Super-Kamiokande detector with a peak energy of 0.6 GeV, corresponding to a significance of 7.3σ.
T2K neutrino flux prediction
The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon neutrino beam with a peak energy of about 0.6 GeV that originates at the Japan Proton Accelerator Research
The electromagnetic calorimeter for the T2K near detector ND280
The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and the Super-Kamiokande detector. Special emphasis is placed on measuring the mixing
Evidence of electron neutrino appearance in a muon neutrino beam
The T2K collaboration reports evidence for electron neutrino appearance at the atmospheric mass splitting, |\Delta m_{32}^2|=2.4x10^{-3} eV^2. An excess of electron neutrino interactions over
Time Projection Chambers for the T2K Near Detectors
The T2K experiment is designed to study neutrino oscillation properties by directing a high intensity neutrino beam produced at J-PARC in Tokai, Japan, towards the large Super-Kamiokande detector
for the K2K collaboration
The K2K experiment is the first long-baseline neutrino-oscillation experiment with hundreds of km distance using an accelerator-based neutrino beam. The nominal sensitive region in the
First Measurement of the Muon Anti-Neutrino Charged Current Quasielastic Double-Differential Cross Section
A high-statistics sample of charged-current muon neutrino scattering events collected with the MiniBooNE experiment is analyzed to extract the first measurement of the double differential cross
Differences in Quasi-Elastic Cross-Sections of Muon and Electron Neutrinos
Accelerator neutrino oscillation experiments seek to make precision measurements of the neutrino flavor oscillations muon (anti)neutrino to electron (anti)neutrino in order to determine the mass
Measurement of the Inclusive NuMu Charged Current Cross Section on Carbon in the Near Detector of the T2K
T2K has performed the first measurement of nu(mu) inclusive charged current interactions on carbon at neutrino energies of similar to 1 GeV where the measurement is reported as a flux-averaged double