Search for nucleon decay using the IMB-3 detector

McGrew, C.; Becker‐Szendy, R.; Bratton, C. B.; Breault, J.; Cady, D. R.; Casper, D.; Dye, S. T.; Gajewski, W.; Ganezer, K. S.; Goldhaber, M.; Haines, T. J.; Halverson, P. G.; Kiełczewska, D.; Kropp, W. R.; Learned, J. G.; LoSecco, J. M.; Matsuno, S.; Matthews, J.; McGrath, G.; Miller, R. S.; Price, LeRoy R.; Reines, F.; Schultz, J.; Sinclair, D.; Sobel, H. W.; Stone, James L.; Sulak, L.; Svoboda, R.; Velde, J. C. van der

doi:10.1103/physrevd.59.052004

Cited by 67 publications

(84 citation statements)

References 18 publications

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“…However recent experimental limits on p → e + π 0 [2][3][4] and p →νK + [5] have already ruled out the simplest B − L conserving GUTs, minimal SU (5) and the minimal supersymmetric version of SU (5), where L stands for lepton number. It has also been shown that any B − L conserving baryon asymmetry generated in the early universe (above 10 TeV scale) should be washed out until now by the triangle anomalies involving electro-weak bosons.…”

Section: Introductionmentioning

confidence: 99%

Search forn−n¯oscillation in Super-Kamiokande

Abe¹,

Hayato²,

Iida³

et al. 2015

Phys. Rev. D

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136

177

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2A search for neutron-antineutron (n −n) oscillation was undertaken in Super-Kamiokande using the 1,489 day livetime or 2.45 × 10 34 neutron-year exposure data. This process violates both baryon and (baryon−lepton) numbers by two units and is predicted by a large class of hypothetical models where the seesaw mechanism is incorporated to explain the observed tiny neutrino masses and the matter-antimatter asymmetry in the universe. No evidence for n −n oscillation was found, the lower limit of the lifetime for neutrons bound in 16 O, in an analysis that included all of the significant sources of experimental uncertainties, was determined to be 1.9 × 10 32 years at the 90% confidence level. The corresponding lower limit for the oscillation time of free neutrons was calculated to be 2.7 × 10 8 s using a theoretical value of the nuclear suppression factor of 0.517 × 10 23 s −1 and its uncertainty.

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Section: Introductionmentioning

confidence: 99%

Search forn−n¯oscillation in Super-Kamiokande

Abe¹,

Hayato²,

Iida³

et al. 2015

Phys. Rev. D

Self Cite

136

177

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“…The results of this analysis provide a stringent test of new physics. The obtained limits represent more than an order of magnitude improvement over the previous analyses of n → νγ [5] and two orders of magnitude for np → e þ ν and np → μ þ ν [19]. The searches for p → e þ X, p → μ þ X (where X is an invisible, massless particle) and np → τ þ ν, are novel.…”

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confidence: 48%

“…This allows us to perform all the analyses within a unified framework. The previous searches for n → νγ, np → e þ ν, and np → μ þ ν, which were performed with a smaller detector using a counting method, resulted in the lifetime limits of 2.8 × 10 31 yr [5], 2.8 × 10 30 yr [19], and 1.6 × 10 30 yr [19], respectively. In contrast, the spectral fit employed within this work allows utilization of the extra information from the energy dependence of signal, background, and the systematic errors.…”

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confidence: 99%

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Search for Nucleon and Dinucleon Decays with an Invisible Particle and a Charged Lepton in the Final State at the Super-Kamiokande Experiment

Takhistov¹,

Abe²,

Haga³

et al. 2015

Phys. Rev. Lett.

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Artículo escrito por muchos autores, sólo se referencian el primero, los autores que firman como Universidad Autónoma de Madrid y el grupo de colaboración en el caso de que aparezca en el artículoSearch results for nucleon decays p→e+X, p→μ+X, n→νγ (where X is an invisible, massless particle) as well as dinucleon decays np→e+ν, np→μ+ν, and np→τ+ν in the Super-Kamiokande experiment are presented. Using single-ring data from an exposure of 273.4 kton·yr, a search for these decays yields a result consistent with no signal. Accordingly, lower limits on the partial lifetimes of τp→e+X>7.9×1032yr, τp→μ+X>4.1×1032yr, τn→νγ>5.5×1032yr, τnp→e+ν>2.6×1032yr, τnp→μ+ν>2.2×1032yr, and τnp→τ+ν>2.9×1031yr at a 90% confidence level are obtained. Some of these searches are novelThe Super- Kamiokande experiment was built and has been operated with funding from the Japanese Ministry of Education, Culture, Sports, Science and Technology, the U.S. Department of Energy, and the U.S. National Science Foundatio

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“…One of the simplest unification scenarios, based on minimal SU(5), has been decisively ruled out by limits on p → e + π 0 [3][4][5]. On the other hand, models based on minimal supersymmetric (SUSY) extensions are strongly constrained by bounds from p →νK + [6], and with signs of SUSY unobserved at the Large Hadron Collider (LHC) [7,8], there is reinvigorated interest in other approaches and possible signatures.…”

mentioning

confidence: 99%