First Results from KamLAND: Evidence for Reactor Antineutrino Disappearance

Eguchi, K.; Enomoto, S.; Furuno, K.; Goldman, J.; Hanada, H.; Ikeda, H.; Ikeda, Kiyomi; Inoue, K.; Ishihara, K.; Itoh, W.; Iwamoto, Toshiyuki; Kawaguchi, T.; Kawashima, Tomoyuki; Kinoshita, Hidetaka; Kishimoto, Y.; Koga, M.; Koseki, Y.; Maeda, Tsuyoshi; Mitsui, Tadao; Motoki, M.; Nakajima, K.; Nakajima, Masayuki; Nakajima, Tetsuo; Ogawa, Hiroshi; Owada, K.; Sakabe, T.; Shimizu, I.; Shirai, J.; Suekane, F.; Suzuki, A.; Tada, Kohei; Tajima, O.; Takayama, T.; Tamae, K.; Watanabe, Hiroko; Busenitz, J.; Djurcic, Z.; McKinny, K.; Mei, Dongming; Piepke, A.; Yakushev, E.; Berger, B. E.; Chan, Y-D.; Decowski, M. P.; Dwyer, D. A.; Freedman, S. J.; Fu, Y.; Fujikawa, B. K.; Heeger, K. M.; Lesko, K. T.; Luk, K. B.; Murayama, Hitoshi; Nygren, D. R.; Okada, C.; Poon, A. W. P.; Steiner, H. M.; Winslow, L. A.; Horton-Smith, G. A.; McKeown, R. D.; Ritter, J.; Tipton, B.; Vogel, P.; Lane, C.; Miletic, T.; Gorham, P. W.; Guillian, G.; Learned, J. G.; Maricic, J.; Matsuno, S.; Pakvasa, Sandip; Dazeley, S.; Hatakeyama, S.; Murakami, Masao; Svoboda, R.; Dieterle, B.; DiMauro, M.; Detwiler, J. A.; Gratta, G.; Ishii, K.; Tolich, N.; Uchida, Y.; Batygov, M.; Bugg, W.; Cohn, H. O.; Efremenko, Yu.; Kamyshkov, Y.; Kozlov, A.; Nakamura, Yuya; Braeckeleer, L. De; Gould, C. R.; Karwowski, H. J.; Markoff, D. M.; Messimore, J. A.; Nakamura, Kenzo; Rohm, Ryan; Tornow, W.; Young, A. R.; Wang, Yifang

doi:10.1103/physrevlett.90.021802

Cited by 2,431 publications

(1,409 citation statements)

References 29 publications

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“…(3.1) to the neutrino mass matrix, m obs ν , determined by the neutrino masses and the neutrino mixing matrix. 3 Note that in the Hybν e case, one has JHEP01(2015)066 Table 3. Reference scenario used in our numerical analysis.…”

Section: Fitting the Neutrino Datamentioning

confidence: 99%

“…In summary, we start with X N 1 = −1 and X N 2 = −2 = −X L 2 , where we have chosen N 2 to couple to L 2 without loss of generality. Given three heavy neutrinos N (1,2,3) , one always ends up with L 1 = 1 or L 3 = 1. It allows a term like L 1 HN 1 , leaving N 1 unstable.…”

Section: Jhep01(2015)066mentioning

confidence: 99%

“…The observation of neutrino oscillations [1][2][3] has essentially established that at least two of the active neutrinos have a tiny yet finite mass [4] and that individual lepton flavours are not conserved in nature. Especially after the discovery of the Higgs boson which strongly indicates a mechanism that provides masses to the charged fermions, the question of why neutrinos have a small but finite mass is one of the key issues in particle physics.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dark matter and lepton flavour violation in a hybrid neutrino mass model

Deppisch

Huang

2015

J. High Energ. Phys.

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Abstract:We describe a hybrid model in which the light neutrino mass matrix receives both tree-level seesaw and loop-induced contributions. An additional U(1) gauge symmetry is used to stabilize the lightest right-handed neutrino as the Dark Matter candidate. After fitting the experimental neutrino data, we analyze and correlate the phenomenological consequences of the model, namely its impact on electroweak precision measurements, the Dark Matter relic abundance, lepton flavour violating rare decays and neutrinoless double beta decay. We find that natural realizations of the model characterized by large Yukawa couplings are compatible with and close to the current experimental limits.

show abstract

Section: Fitting the Neutrino Datamentioning

confidence: 99%

Section: Jhep01(2015)066mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dark matter and lepton flavour violation in a hybrid neutrino mass model

Deppisch

Huang

2015

J. High Energ. Phys.

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show abstract

“…Neutrino masses observed in oscillation experiments [1][2][3] are so far the only signal for physics beyond the standard model (SM) measured in laboratories. However, while we do know now mass squared differences and mixing angles to a very high precision [4][5][6], there is no experimental data on whether neutrinos are Dirac or Majorana particles.…”

Section: Introductionmentioning

confidence: 99%

Systematic classification of two-loop realizations of the Weinberg operator

Sierra

Degée

Dorame

et al. 2015

J. High Energ. Phys.

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We systematically analyze the d = 5 Weinberg operator at 2-loop order. Using a diagrammatic approach, we identify two different interesting categories of neutrino mass models: (i) Genuine 2-loop models for which both, tree-level and 1-loop contributions, are guaranteed to be absent. And (ii) finite 2-loop diagrams, which correspond to the 1-loop generation of some particular vertex appearing in a given 1-loop neutrino mass model, thus being effectively 2-loop. From the large list of all possible 2-loop diagrams, the vast majority are infinite corrections to lower order neutrino mass models and only a moderately small number of diagrams fall into these two interesting classes. Moreover, all diagrams in class (i) are just variations of three basic diagrams, with examples discussed in the literature before. Similarly, we also show that class (ii) diagrams consists of only variations of these three plus two more basic diagrams. Finally, we show how our results can be consistently and readily used in order to construct two-loop neutrino mass models.

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“…Results from experiments carried out with neutrinos produced in artificial sources, like reactors and accelerators, strongly support the fact that neutrinos are massive [4,5].…”

Section: Introductionmentioning

confidence: 79%