Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen

被引：205

作者：

Abe, S. ^{[1
]}

Asami, S. ^{[1
]}

Eizuka, M. ^{[1
]}

Futagi, S. ^{[1
]}

Gando, A. ^{[1
]}

Gando, Y. ^{[1
]}

Gima, T. ^{[1
]}

Goto, A. ^{[1
]}

Hachiya, T.

Hata, K.

Hayashida, S. ^{[1
,23
]}

Hosokawa, K. ^{[1
,24
]}

Ichimura, K. ^{[1
]}

Ieki, S.

Ikeda, H. ^{[1
]}

Inoue, K. ^{[1
,2
]}

Ishidoshiro, K. ^{[1
]}

Kamei, Y. ^{[1
]}

Kawada, N. ^{[1
]}

Kishimoto, Y. ^{[1
,2
]}

Koga, M. ^{[1
,2
]}

Kurasawa, M. ^{[1
]}

Maemura, N. ^{[1
]}

Mitsui, T. ^{[1
]}

Miyake, H. ^{[1
]}

Nakahata, T. ^{[1
]}

Nakamura, K. ^{[1
]}

Nakamura, R.

Ozaki, H. ^{[1
,3
]}

Sakai, T. ^{[1
]}

Sambonsugi, H. ^{[1
]}

Shimizu, I. ^{[1
]}

Shirai, J. ^{[1
]}

Shiraishi, K. ^{[1
]}

Suzuki, A. ^{[1
]}

Suzuki, Y. ^{[1
]}

Takeuchi, A. ^{[1
]}

Tamae, K. ^{[1
]}

Ueshima, K. ^{[1
,25
]}

Watanabe, H. ^{[1
]}

Yoshida, Y. ^{[1
]}

Obara, S. ^{[1
,4
,25
]}

Ichikawa, A. K. ^{[5
]}

Chernyak, D. ^{[2
,26
]}

Kozlov, A. ^{[2
,27
]}

Nakamura, K. Z. ^{[6
]}

Yoshida, S. ^{[7
]}

Takemoto, Y. ^{[8
,24
]}

Umehara, S. ^{[8
]}

Fushimi, K. ^{[9
]}

机构：

[1] Tohoku Univ, Res Ctr Neutrino Sci, Sendai 9808578, Japan

[2] Univ Tokyo, Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

[3] Tohoku Univ, Grad Program Phys Universe, Sendai 9808578, Japan

[4] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai 9808578, Japan

[5] Tohoku Univ, Dept Phys, Sendai 9808578, Japan

[6] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[7] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan

[8] Osaka Univ, Res Ctr Nucl Phys, Osaka, Ibaraki 5670047, Japan

[9] Tokushima Univ, Dept Phys, Tokushima 7708506, Japan

[10] Tokushima Univ, Grad Sch Integrated Arts & Sci, Tokushima 7708502, Japan

[11] Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA

[12] Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA

[13] MIT, Cambridge, MA 02139 USA

[14] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[15] Triangle Univ Nucl Lab, Durham, NC 27708 USA

[16] Duke Univ, Phys Dept, Durham, NC 27708 USA

[17] North Carolina Cent Univ, Durham, NC 27707 USA

[18] Univ North Carolina Chapel Hill, Chapel Hill, NC 27599 USA

[19] Virginia Polytech Inst State Univ, Ctr Neutrino Phys, Blacksburg, VA 24061 USA

[20] Univ Washington, Ctr Expt Nucl Phys & Astrophys, Seattle, WA 98195 USA

[21] Nikhef & Univ Amsterdam, Sci Pk, Amsterdam, Netherlands

[22] Boston Univ, Boston, MA 02215 USA

[23] Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England

[24] Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Hida, Gifu 5061205, Japan

[25] Natl Inst Quantum & Radiol Sci & Technol QST, Sendai 9808579, Japan

[26] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[27] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Moscow 115409, Russia

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 05期

基金：

美国国家科学基金会; 荷兰研究理事会;

关键词：

XE-136;

D O I：

10.1103/PhysRevLett.130.051801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0vfifi) decay half-life in 136Xe using a xenon-loaded liquid scintillator. We report an improved search using an upgraded detector with almost double the amount of xenon and an ultralow radioactivity container, corresponding to an exposure of 970 kg yr of 136Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation of xenon, and have required the use of novel background rejection techniques. We obtain a lower limit for the 0vfifi decay half-life of T0v 1/2 > 2.3 x 1026 yr at 90% C.L., corresponding to upper limits on the effective Majorana neutrino mass of 36-156 meV using commonly adopted nuclear matrix element calculations.

引用

页数：7

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