Search for νμ→νe oscillations in the NOMAD experiment

Astier, P.; Autiero, D.; Baldisseri, A.; Baldo‐Ceolin, M.; Banner, M.; Bassompierre, G.; Benslama, K.; Besson, N.; Bird, I.; Blumenfeld, B.; Bobisut, F.; Bouchez, J.; Boyd, S.; Bueno, A.; Bunyatov, S.A.; Camilleri, L.; Cardini, A.; Cattaneo, P. W.; Cavasinni, V.; Cervera-Villanueva, A.; Challis, R.; Chukanov, A.; Collazuol, G.; Conforto, G.; Conta, C.; Contalbrigo, M.; Cousins, R.; Daniels, D.; Degaudenzi, H.; Prete, T. Del; Santo, A. De; Dignan, T.; Lella, L. Di; Silva, E. do Couto e; Dumarchez, J.; Ellis, M.; Feldman, G. J.; Ferrari, R.; Ferrère, D.; Flaminio, V.; Fraternali, M.; Gaillard, J.M.; Gangler, É.; Geiser, A.; Geppert, D.; Gibin, D.; Gninenko, S.; Godley, A.; Gómez-Cadenas, J. J.; Gösset, J.; Göbling, C.; Gouanère, M.; Grant, A.; Graziani, G.; Guglielmi, A.; Hagner, C.; Hernando, J. A.; Hubbard, D.; Hurst, P.; Hyett, Nicole; Iacopini, E.; Joseph, C.; Juget, F.; Kent, N.; Kirsanov, M.; Klimov, O.; Kokkonen, J.; Kovzelev, A.; Krasnoperov, A.; Kustov, D.; Lacaprara, S.; Lachaud, C.; Lakić, B.; Lanza, A.; Rotonda, L. La; Laveder, M.; Letessier‐Selvon, A.; Lévy, J. M.; Linssen, L.; Ljubičić, A.; Long, J.; Lupi, A.; Marchionni, A.; Martelli, F.; Méchain, X.; Mendiburu, J. P.; Meyer, J.; Mezzetto, M.; Mishra, S. R.; Moorhead, G. F.; Naumov, D.; Nédélec, P.; Nefedov, Y.; Nguyen-Mau, C.; Orestano, D.; Pastore, F.; Peak, L. S.; Pennacchio, E.; Pessard, H.; Petti, R.; Placci, A.; Polesello, G.; Pollmann, D.; Polyarush, A. Yu.; Popov, Б.; Poulsen, C.; Rebuffi, Luca; Reno, R. C.; Rico, J.; Riemann, P.; Roda, C.; Rubbia, A.; Salvatore, F.; Schahmanèche, K.; Schmidt, B.; Schmidt, T.; Sconza, A.; Sevior, M. E.; Sillou, D.; Soler, F. J. P.; Sozzi, G.; Steele, D.; Stiegler, U.; Stipčević, M.; Stolarczyk, Th.; Tareb-Reyes, M.; Taylor, G. N.; Терещенко, В.; Toropin, A.; Touchard, A. M.; Tovey, S. N.; Trân, M. T.; Tsesmelis, E.; Ulrichs, J.; Vacavant, L.; Valdata‐Nappi, M.; Valuev, V.; Vannucci, F.; Varvell, K. E.; Veltri, M.; Vercesi, V.; Vidal–Sitjes, G.; Vieira, J.-M.; Vinogradova, T.; Weber, F. V.; Weisse, Thomas; Wilson, F. F.; Winton, L.J.; Yabsley, B.; Zaccone, H.; Zuber, Κ.; Zuccon, P.

doi:10.1016/j.physletb.2003.07.029

Cited by 203 publications

(133 citation statements)

References 33 publications

(9 reference statements)

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“…The ν µ → ν e andν µ →ν e appearance data of the LSND [35], KARMEN [36], NOMAD [37], MiniBooNE [38] and ICARUS [39] experiments. In particular, we use only the MiniBooNE data above 475 MeV, because the data at lower energy contains an , number of degrees of freedom (NDF), goodness-of-fit (GoF) and best-fit values of the mixing parameters obtained in our 3+0, 3+1 and 3+2 fits of short-baseline oscillation data.…”

Section: Sbl Analysismentioning

confidence: 99%

Sterile neutrinos: Cosmology versus short-baseline experiments

et al. 2013

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Cosmology and short baseline neutrino oscillation data both hint at the existence of light sterile neutrinos with masses in the 1 eV range. Here we perform a detailed analysis of the sterile neutrino scenario using both cosmological and SBL data. We have additionally considered the possibility that the extra neutrino degrees of freedom are not fully thermalised in the early universe. Even when analyzing only cosmological data we find a preference for the existence of massive sterile neutrinos in both (3+1) and (3+2) scenarios, and with the inclusion of SBL data the evidence is formally at the 3.3σ level in the case of a (3+1) model. Interestingly, cosmological and SBL data both point to the same mass scale of approximately 1 eV. In the (3+1) framework WMAP9+SPT provide a value of the sterile mass eigenstate m4 = (1.72 ± 0.65) eV: this result is strenghtened by adding the prior from SBL posterior to m4 = (1.27 ± 0.12) eV (m4 = (1.23 ± 0.13) eV when SDSS is also considered in the cosmological analysis). In the (3+2) scheme, two additional, non-fully thermalized, neutrinos are compatible with the whole set of cosmological and SBL data, leading to mass values of m4 = (0.95 ± 0.30) eV and m5 = (1.59 ± 0.49) eV. The inclusion of Planck data does not change our considerations about the mass scale; concerning the extra neutrino degrees of freedom, invoking a partial thermalisation the 3+1 model is still consistent with the latest data.

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Section: Sbl Analysismentioning

confidence: 99%

Sterile neutrinos: Cosmology versus short-baseline experiments

et al. 2013

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“…The exclusion plot for the parameters of the non-standard ν µ → ν e oscillation, obtained from this analysis using the Bayesian method, is shown. The other limits shown, mostly using frequentist methods, are from KARMEN (ν µ → ν e [28]), BUGEY (ν e disappearance [29]), CHOOZ (ν e disappearance [30]), NOMAD (ν µ → ν e [31]) and ICARUS (ν µ → ν e [10]). The regions corresponding to the positive indications reported by LSND (ν µ → ν e [8]) and MiniBooNE (ν µ → ν e and ν µ → ν e [9]) are also shown.…”

Section: Non-standard Oscillationsmentioning

confidence: 99%

Search for ν μ → ν e oscillations with the OPERA experiment in the CNGS beam

Agafonova¹,

Aleksandrov²,

Anokhina³

et al. 2013

J. High Energ. Phys.

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A first result of the search for ν µ → ν e oscillations in the OPERA experiment, located at the Gran Sasso Underground Laboratory, is presented. The experiment looked for the appearance of ν e in the CNGS neutrino beam using the data collected in 2008 and 2009. Data are compatible with the non-oscillation hypothesis in the three-flavour mixing model. A further analysis of the same data constrains the non-standard oscillation parameters θ new and ∆m 2 new suggested by the LSND and MiniBooNE experiments. For large ∆m 2 new values (>0.1 eV 2 ), the OPERA 90% C.L. upper limit on sin 2 (2θ new ) based on a Bayesian statistical method reaches the value 7.2 × 10 −3 .

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“…This limit is sensitive to the lightest neutrino mass m l and can be somewhat relaxed (similar to how we obtain a good 3+2 to all neutrino data) by postulating a (mild) hierarchy of right-handed neutrino masses and by assuming that sterile-electron and sterile-muon neutrino mixing is suppressed with respect to naive expectations for the lightest mostly sterile state(s). For larger values of m l , M values around 10 eV are already constrained by ν µ → ν e searches at the NuTeV [21] and NOMAD [22] experiments, and ν µ → ν τ searches at CHORUS [23].…”

Section: A Short Baseline Oscillation Constraintsmentioning

confidence: 99%

Neutrino phenomenology of very low-energy seesaw scenarios

2007

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The Standard Model augmented by the presence of gauge-singlet right-handed neutrinos proves to be an ideal scenario for accommodating nonzero neutrino masses. Among the new parameters of this "New Standard Model" are right-handed neutrino Majorana masses M . Theoretical prejudice points to M much larger than the electroweak symmetry breaking scale, but it has recently been emphasized that all M values are technically natural and should be explored. Indeed, M around 1 − 10 eV can accommodate an elegant oscillation solution to the LSND anomaly, while other M values lead to several observable consequences. We consider the phenomenology of low energy (M 1 keV) seesaw scenarios. By exploring such a framework with three right-handed neutrinos, we can consistently fit all oscillation data -including those from LSND -while partially addressing several astrophysical puzzles, including anomalous pulsar kicks, heavy element nucleosynthesis in supernovae, and the existence of warm dark matter. Furthermore, low-energy seesaws -regardless of their relation to the LSND anomaly -can also be tested by future tritium beta-decay experiments, neutrinoless double-beta decay searches, and other observables. We estimate the sensitivity of such probes to M .

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Search for νμ→νe oscillations in the NOMAD experiment

Cited by 203 publications

References 33 publications

Sterile neutrinos: Cosmology versus short-baseline experiments

Sterile neutrinos: Cosmology versus short-baseline experiments

Search for ν μ → ν e oscillations with the OPERA experiment in the CNGS beam

Neutrino phenomenology of very low-energy seesaw scenarios

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