Discovery of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>τ</mml:mi></mml:math>Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Agafonova, N.; Aleksandrov, A.; Anokhina, A.; Aoki, Shigeki; Ariga, A.; Ariga, T.; Bender, D.; Bertolin, A.; Bodnarchuk, I. M.; Bozza, C.; Brugnera, R.; Buonaura, A.; Buontempo, S.; Büttner, B.; Chernyavsky, M.; Chukanov, A.; Consiglio, L.; D’Ambrosio, N.; Lellis, G. De; Serio, M. De; Sanchez, P. del Amo; Crescenzo, A. Di; Ferdinando, D. Di; Marco, N. Di; Dmitrievski, S.; Dracos, M.; Duchesneau, D.; Dusini, S.; Dzhatdoev, T.; Ebert, J.; Ereditato, A.; Fini, R. A.; Fornari, F.; Fukuda, Tsutomu; Galati, G.; Garfagnini, A.; Goldberg, J.; Gornushkin, Y.; Grella, G.; Guler, A. M.; Gustavino, C.; Hagner, C.; Hara, T.; Hayakawa, Hisao; Hollnagel, A.; Hosseini, B.; Ishiguro, K.; Jakovčić, K.; Jollet, C.; Kamiscioglu, C.; Kamiscioglu, M.; Kim, J. H.; Kim, S. H.; Kitagawa, N.; Kliček, B.; Kodama, K.; Komatsu, M.; Köse, U.; Kreslo, I.; Laudisio, F.; Lauria, A.; Ljubičić, A.; Longhin, A.; Loverre, P.; Malgin, A. S.; Malenica, Maša; Mandrioli, G.; Matsuo, T.; Matsushita, T.; Matveev, V.; Mauri, N.; Medinaceli, E.; Meregaglia, A.; Mikado, S.; Miyanishi, M.; Mizutani, F.; Monacelli, P.; Montesi, M.C.; Morishima, Keisuke; Muciaccia, M. T.; Naganawa, N.; Naka, Takashi; Nakamura, Mitsuhiro; Nakano, T.; Nakatsuka, Y.; Niwa, K.; Ogawa, S.; Olchevsky, A.; Omura, T.; Ozaki, K.; Paoloni, A.; Paparella, L.; Park, B. D.; Park, I. G.; Pasqualini, L.; Pastore, Alessandro; Patrizii, L.; Pessard, H.; Pistillo, C.; Подгрудков, Д.; Polukhina, N.; Pozzato, M.; Pupilli, F.; Roda, M.; Роганова, Т. М.; Rokujo, H.; Rosa, G.; Ryazhskaya, O. G.; Sato, Osamu; Schembri, Adam; Schmidt‐Parzefall, W.; Shakirianova, I.; Shchedrina, T.; Sheshukov, A.; Shibuya, H.; Shiraishi, Takeshi; Shoziyoev, G.; Simone, S.; Sioli, M.; Sirignano, C.; Sirri, G.; Sotnikov, A.; Spinetti, M.; Stančo, L.; Старков, Н. И.; Stellacci, Francesco; Stipčević, M.; Strolin, P.; Takahashi, Satoru; Tenti, M.; Terranova, F.; Tioukov, V.; Tufanli, S.; Vilain, P.; Vladymyrov, Mykhailo; Votano, L.; Vuilleumier, J. L.; Wilquet, G.; Wonsak, B.; Yoon, C. S.; Zemskova, S.

doi:10.1103/physrevlett.115.121802

Cited by 174 publications

(128 citation statements)

References 37 publications

Supporting

Mentioning

124

Contrasting

Order By: Relevance

“…in the oscillation parameters region discovered by detecting atmospheric neutrinos [3]. OPERA has observed four ν τ CC interaction candidate events [4][5][6][7], consistent with the expectation of the standard oscillation framework at this scale. This result represents the first direct evidence of ν µ → ν τ oscillation in appearance mode.…”

supporting

confidence: 62%

“…The absence of a ν µ → ν τ oscillation signal, i.e. the hypothesis of the four events being background, is excluded with a significance of 4.2 σ [7].…”

Section: Jhep06(2015)069mentioning

confidence: 99%

“…In [7] the detection of four ν τ CC events is compared to the expectation for ν µ → ν τ oscillations in the atmospheric sector, computed within a simplified two-flavour scheme assuming full mixing and |∆m 2 32 | = 2.32 × 10 −3 eV 2 [22]. The expected number of events is 2.30 ± 0.46 (2.21 ± 0.44) assuming normal (inverted) hierarchy of neutrino masses; the number is obtained by rescaling the value given in [7] .…”

Section: Jhep06(2015)069mentioning

confidence: 99%

“…The expected number of events is 2.30 ± 0.46 (2.21 ± 0.44) assuming normal (inverted) hierarchy of neutrino masses; the number is obtained by rescaling the value given in [7] . By including the background, 2.53 ± 0.46 (2.44 ± 0.44) events are expected in total.…”

Section: Jhep06(2015)069mentioning

confidence: 99%

“…n b = 0.23 is the expected number of background events [7], φ(E) is the ν µ flux shown in figure 1, P (E) is the oscillation probability given by equations (4.1) or (4.2), σ(E) is the ν τ CC interaction cross section, (E) is the τ detection efficiency and A is a normalisation factor proportional to the fraction of the analysed sample and to the target mass.…”

Section: Jhep06(2015)069mentioning

confidence: 99%

See 4 more Smart Citations

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2015

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beamThe OPERA collaboration E-mail: alessandro.paoloni@lnf.infn.it, alessandra.pastore@ba.infn.it Abstract: The OPERA experiment, exposed to the CERN to Gran Sasso ν µ beam, collected data from 2008 to 2012. Four oscillated ν τ Charged Current interaction candidates have been detected in appearance mode, which are consistent with ν µ → ν τ oscillations at the atmospheric ∆m 2 within the "standard" three-neutrino framework. In this paper, the OPERA ν τ appearance results are used to derive limits on the mixing parameters of a massive sterile neutrino. The OPERA collaboration 11 IntroductionThe OPERA experiment [1] operated in the CERN Neutrinos to Gran Sasso (CNGS) beam produced at CERN and directed towards the Gran Sasso Underground Laboratory of INFN (LNGS), 730 km away, where the detector is located. The experiment is unique in its capability to observe ν τ appearance on an event-by-event basis. Nuclear emulsion films instrumenting the target allow the detection of the short-lived τ lepton decay, and hence the identification of ν τ Charged Current (CC) interactions. The standard three-neutrino oscillation framework predicts ν µ → ν τ oscillations with close-to-maximal mixing at the so-called atmospheric scale, ∆m 2 32 ∼ 2.4 × 10 −3 eV 2 [2], i.e. in the oscillation parameters region discovered by detecting atmospheric neutrinos [3]. OPERA has observed four ν τ CC interaction candidate events [4][5][6][7], consistent with the expectation of the standard oscillation framework at this scale. This result represents the first direct evidence of ν µ → ν τ oscillation in appearance mode.In the present paper, limits are derived on the existence of a massive sterile neutrino. The excess of ν e (ν e ) observed by the LSND [8] and MiniBooNE [9] collaborations and the so-called reactor [10] and Gallium [11,12] neutrino anomalies are also interpreted as due to the existence of a fourth sterile neutrino with mass at the eV scale. In relation to this issue, it is worth mentioning that the effective number of neutrino-like species decoupled from the primeval plasma measured by the Planck collaboration is 3.15 ± 0.23 at 95% Confidence Level (CL) [13].Neutrino oscillations at large ∆m 2 have been searched for by several short baseline experiments. The most stringent limits on ν µ → ν τ oscillations were set by the NOMAD [14] and CHORUS [15] experiments, with high sensitivity for ∆m 2 values larger than 10 eV 2 .In the following, a short description of the OPERA experimental setup and of the procedure used to detect ν τ interactions is given, the data analysis is described and exclusion regions in the parameter space are derived.

show abstract

supporting

confidence: 62%

“…The absence of a ν µ → ν τ oscillation signal, i.e. the hypothesis of the four events being background, is excluded with a significance of 4.2 σ [7].…”

Section: Jhep06(2015)069mentioning

confidence: 99%

Section: Jhep06(2015)069mentioning

confidence: 99%

Section: Jhep06(2015)069mentioning

confidence: 99%

Section: Jhep06(2015)069mentioning

confidence: 99%

See 3 more Smart Citations

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2015

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Development of Nuclear Emulsions for Muography

Morishima¹,

Kitagawa²,

Nishio³

2022

Muography

View full text Add to dashboard Cite

Measurement of the Antineutrino Double-Differential Charged-Current Quasi-Elastic Scattering Cross Section at MINERvA

Patrick¹

2018

Springer Theses

View full text Add to dashboard Cite

Channel Each PMT (and FEB) has 64 channels, which are connected to 64 different strips in the detector. Each corresponds to a Crate-CROC-Chain-Board-Pixel. Note: electrical engineers will sometimes use the word channel to refer to a chain (but they count from1 instead of 0, so channel number will be chain number plus 1). This is very confusing. Do not do it.Charged-current Any interaction wherein a neutrino exchanges a W boson, converting into its partner charged lepton. Chvojka corollary Free coffee for people writing their theses!Crate There are two crates, each of which contains CROCs. There are 8 CROC-Es in Crate -and 7 in Crate 1.CRIM Helps to synch the timing of the CROC-Es. There are 4 CROC-Es per CRIM (two CRIMs per crate).CROC-E Chain readout controller (ethernet). Up to four chains of FEBs are connected to a CROC, which polls the chains for readout.Cross talk Current in a given channel can induce a small amount of current in the neighboring channel. The weave is used to protect us from false readings due to cross talk. DAQThe system that receives raw data from the detector and stores it to disk.dCache System for long-term data storage. Files copied to dCache will either be stored to disk or to tape, and can be accessed seamlessly using Samweb.DIS Deep inelastic scattering -occurs at high Q 2 , where the neutrino scatters off a constituent quark in the nucleon, breaking it apart. DedicationDedicated to my Dad, Richard Patrick, who I wish was here to read this. I miss you.

show abstract

Discovery ofτNeutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

Cited by 174 publications

References 37 publications

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Limits on muon-neutrino to tau-neutrino oscillations induced by a sterile neutrino state obtained by OPERA at the CNGS beam

Development of Nuclear Emulsions for Muography

Measurement of the Antineutrino Double-Differential Charged-Current Quasi-Elastic Scattering Cross Section at MINERvA

Contact Info

Product

Resources

About