Publisher’s Note: Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen [Phys. Rev. Lett.<b>117</b>, 082503 (2016)]

Gando, A.; Gando, Y.; Hachiya, Takahiko; Hayashi, A.; Hayashida, S.; Ikeda, H.; Inoue, K.; Ishidoshiro, K.; Karino, Yoshiji; Koga, Masayuki; Matsuda, Shôichi; Mitsui, Tadao; Nakamura, Ko; Obara, Shigeru; Oura, Toshiaki; Ozaki, H.; Shimizu, I.; Shirahata, Y.; Shirai, J.; Suzuki, Aya; Takai, Toshiaki; Tamae, K.; Teraoka, Y.; Ueshima, K.; Watanabe, H.; Kozlov, A.; Takemoto, Y.; Yoshida, S.; Fushimi, K.; Banks, Thomas; Berger, B. E.; Fujikawa, B. K.; O’Donnell, T.; Winslow, L. A.; Efremenko, Y.; Karwowski, H. J.; Markoff, D. M.; Tornow, W.; Detwiler, J. A.; Enomoto, S.; Decowski, M. P.

doi:10.1103/physrevlett.117.109903

Cited by 438 publications

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“…At the same time the lower limits for the half-lives of the 0νββ decay mode keep steadily increasing [3]. Important nuclei for the present and future 0νββ experiments are 76 Ge (the GERDA experiment [6], and in the future GERDA and Majorana [7]), 82 Se (the NEMO-3 experiment [8], and in the future SuperNEMO [9] and MOON [10]), 96 Zr (the NEMO-3 experiment [11]), 100 Mo (the NEMO-3 experiment [12], and in the future AMoRE [13], LUMINEU [14], CUPID [15], MOON [10]), 116 Cd (the NEMO-3 experiment [16], and in the future AURORA [17], COBRA [18]), 130 Te (the CUORE experiment [19], and in the future CUORE and SNO+ [20]), and 136 Xe (the EXO [21] and KamLAND-Zen [22] experiments, and in the future NEXT [23] and PandaX-III [24]). …”

Section: Introductionmentioning

confidence: 99%

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Suhonen

2017

Phys. Rev. C

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Detection of the neutrinoless ββ (0νββ) decay is of high priority in the particle-and neutrinophysics communities. The detectability of this decay mode is strongly influenced by the value of the weak axial-vector coupling constant gA. The recent nuclear-model analyses of β and ββ decays suggest that the value of gA could be dramatically quenched, reaching ratios of g free A /gA ≈ 4, where g free A = 1.27 is the free, neutron-decay, value of gA. The effects of this quenching appear devastating for the sensitivity of the present and future 0νββ experiments since the 4th power of this ratio scales the 0νββ half-lives. This, in turn, could lead to some two orders of magnitude less sensitivity for the 0νββ experiments. In the present article it is shown that by using a consistent approach to both the two-neutrino ββ and 0νββ decays by the proton-neutron quasiparticle random-phase approximation (pnQRPA), the feared two-orders-of-magnitude reduction in the sensitivity of the 0νββ experiments actually shrinks to a reduction by factors in the range 2 − 6. This certainly has dramatic consequences for the potential to detect the 0νββ decay.PACS numbers: 21.60.Jz, 23.40.Hc, 27.50.+e, 27.60.+j Keywords: Detectability of the neutrinoless double beta decay, nuclear matrix elements, quenching of the axial-vector coupling strength, sensitivity of the double-beta experiments

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Section: Introductionmentioning

confidence: 99%

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Suhonen

2017

Phys. Rev. C

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“…The decay amplitude for the 0νββ process is proportional to the effective Majorana neutrino mass given by [35] jm ee j ¼ where m i are the three neutrino masses and U ei are the elements of the first row of the PMNS matrix [36]. In our proposal, this mixing matrix is given bỹ m ee come from the KamLAND-Zen [37] and GERDA [38] experiments; they are respectively given by jm ee j < 0.061-0.165 eV; jm ee j < 0. Fig.…”

Section: A Neutrinoless Double Beta Decaymentioning

confidence: 99%

Hybrid seesaw neutrino model in SUSY SU(5)×A4

et al. 2018

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Motivated by recent results from neutrino experiments, we study the neutrino masses and mixing in the framework of a SUSY SUð5Þ × A 4 model. The hybrid of Type I and Type II seesaw mechanisms leads to the nonzero value of the reactor angle θ 13 ≠ 0 and to the recently disfavored maximal atmospheric angle θ 23 ≠ 45°by the NOvA experiment. The phenomenological consequences of the model are studied for both normal and inverted mass hierarchies. The obtained ranges for the effective Majorana neutrino mass m ββ , the electron neutrino mass m ν e , and the CP violating phase δ CP lie within the current experimental allowed ranges where we find that the normal mass hierarchy is favored over the inverted one.

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“…For example, 0νββ decay search by KamLAND-Zen [14,15], WIMP search with the directional information by NEWAGE [16], supernova relic neutrino searches by both SK [17,18] and KamLAND [19], etc.…”

Section: Development Of the Database In Kamioka Motivation (Experimenmentioning

confidence: 99%

Development of the database for low-background studies in Kamioka

Nakano

Takeuchi

2018

AIP Conference Proceedings

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Abstract. Needless to say, it is important to select ultra-low background materials for dark matter and 0νββ detectors. All materials and components must be evaluated before the detector construction. This presentation will focus on developing a database for such purpose based on the open source database, Persephone (radiopurity.org). The aim of this project is to share information on low-radioactivity materials measured by several techniques in Kamioka observatory among Japanese community. Improvements of the functions of the database and the typical contents will be shown. In addition, several running programs for screening lowradioactive materials at Kamioka will be discussed.

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Publisher’s Note: Search for Majorana Neutrinos Near the Inverted Mass Hierarchy Region with KamLAND-Zen [Phys. Rev. Lett.117, 082503 (2016)]

Abstract: This corrects the article DOI: 10.1103/PhysRevLett.117.082503.

Cited by 438 publications

References 0 publications

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Impact of the quenching of gA on the sensitivity of 0νββ experiments

Hybrid seesaw neutrino model in SUSY SU(5)×A4

Development of the database for low-background studies in Kamioka

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