Reactor on-off antineutrino measurement with KamLAND

Gando, A.; Gando, Y.; Hanakago, H.; Ikeda, H.; Inoue, K.; Ishidoshiro, K.; Ishikawa, H.; Koga, M.; Matsuda, R.; Matsuda, Sumio; Mitsui, Tadao; Motoki, D.; Nakamura, K.; Obata, A.; Oki, A.; Oki, Y.; Otani, M.; Shimizu, I.; Shirai, J.; Suzuki, A.; Takemoto, Y.; Tamae, K.; Ueshima, K.; Watanabe, Hiroko; Xu, B. D.; Yamada, S.; Yamauchi, Yoshiaki; Yoshida, H. P.; Kozlov, A.; Yoshida, S.; Piepke, A.; Banks, Thomas; Fujikawa, B. K.; Han, K.; O’Donnell, T.; Berger, B. E.; Learned, J. G.; Matsuno, S.; Sakai, M.; Efremenko, Y.; Karwowski, H. J.; Markoff, D. M.; Tornow, W.; Detwiler, J. A.; Enomoto, S.; Decowski, M. P.

doi:10.1103/physrevd.88.033001

Cited by 352 publications

(424 citation statements)

References 39 publications

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“…KamLAND is the largest scintillation detector constructed to date, with a detector mass of 1 kton [12]. As discussed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Search for the proton decay modep→ν¯K+with KamLAND

Asakura¹,

Gando²,

Gando³

et al. 2015

Phys. Rev. D

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We present a search for the proton decay mode p →νK þ based on an exposure of 8.97 kton-years in the KamLAND experiment. The liquid scintillator detector is sensitive to successive signals from p →νK þ with unique kinematics, which allow us to achieve a detection efficiency of 44%, higher than previous searches in water Cherenkov detectors. We find no evidence of proton decays for this mode. The expected background, which is dominated by atmospheric neutrinos, is 0.9 AE 0.2 events. The nonbackgroundsubtracted limit on the partial proton lifetime is τ=Bðp →νK þ Þ > 5.4 × 10

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“…KamLAND is the largest scintillation detector constructed to date, with a detector mass of 1 kton [12]. As discussed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Search for the proton decay modep→ν¯K+with KamLAND

Asakura¹,

Gando²,

Gando³

et al. 2015

Phys. Rev. D

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“…A negligible amount of correlated events with a ∼1 s time constant were identified and their contribution in theν e time window determined. (3) (α,n) background for ν e search has been extensively discussed elsewhere [3][4][5][6][7]. The average rate of 210 Po in the dataset is determined to be (14.1±0.2) counts/(day·ton).…”

mentioning

confidence: 99%

Spectroscopy of geoneutrinos from 2056 days of Borexino data

Agostini¹,

Appel²,

Bellini³

et al. 2015

Phys. Rev. D

105

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We report an improved geoneutrino measurement with Borexino from 2056 days of data taking. The present exposure is (5.5±0.3)×1031 proton×yr. Assuming a chondritic Th/U mass ratio of 3.9, we obtain 23.7+6.5−5.7(stat)+0.9−0.6(sys) geoneutrino events. The null observation of geoneutrinos with Borexino alone has a probability of 3.6×10−9 (5.9σ). A geoneutrino signal from the mantle is obtained at 98% C.L. The radiogenic heat production for U and Th from the present best-fit result is restricted to the range 23–36 TW, taking into account the uncertainty on the distribution of heat producing elements inside the Earth

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“…After the publication of the KamLAND result in Gando et al [2013], new reference models with refined crustal compositions become available in the literature. If the reference model [Enomoto et al 2007] used in the analysis in Gando et al [2013] is replaced with a modern model [Huang et al 2013], the radiogenic heat is estimated to be 14.9 +9.8 −8.3 TW from U and Th.…”

Section: Earth Model Comparisonmentioning

confidence: 99%

“…If the reference model [Enomoto et al 2007] used in the analysis in Gando et al [2013] is replaced with a modern model [Huang et al 2013], the radiogenic heat is estimated to be 14.9 +9.8 −8.3 TW from U and Th. The increase of the radiogenic heat estimation is mainly due to the change in the crustal geo o − e flux contribution, which is the offset of the flux-heat conversion function as shown in Figure 4.…”

Section: Earth Model Comparisonmentioning

confidence: 99%