Ab Initio Uncertainty Quantification of Neutrinoless Double-Beta Decay in 76Ge

被引：20

作者：

Belley, A. ^{[1
,2
]}

Yao, J. M. ^{[3
]}

Bally, B. ^{[4
]}

Pitcher, J. ^{[1
,2
]}

Engel, J. ^{[5
]}

Hergert, H. ^{[6
,7
]}

Holt, J. D. ^{[1
,8
]}

Miyagi, T. ^{[9
,10
,11
]}

Rodriguez, T. R. ^{[12
,13
,14
]}

Romero, A. M. ^{[15
,16
]}

Stroberg, S. R. ^{[17
]}

Zhang, X. ^{[3
]}

机构：

[1] TRIUMF, Vancouver, BC, Canada

[2] Univ British Columbia, Dept Phys & Astron, Vancouver, BC, Canada

[3] Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China

[4] Univ Paris Saclay, ESNT, IRFU, CEA, F-91191 Gif Sur Yvette, France

[5] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27516 USA

[6] Michigan State Univ, Facil Rare Isotope Beams, E Lansing, MI 48824 USA

[7] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[8] McGill Univ, Dept Phys, Montreal, PQ, Canada

[9] Tech Univ Darmstadt, Dept Phys, D-64289 Darmstadt, Germany

[10] GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[11] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[12] Univ Complutense Madrid, Dept Estruct Mat Fis Term & Elect, E-28040 Madrid, Spain

[13] Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain

[14] UAM, Ctr Invest Avanzada Fis Fundamental CIAFF, E-28049 Madrid, Spain

[15] Univ Barcelona UB, Dept Fis Quant & Astrofis FQA, C Marti & Franques 1, Barcelona 08028, Spain

[16] Univ Barcelona UB, Inst Ciencies Cosmos ICCUB, C Marti & Franques 1, Barcelona 08028, Spain

[17] Univ Notre Dame, Dept Phys & Astron, Notre Dame, IN 46556 USA

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 18期

基金：

欧洲研究理事会; 中国国家自然科学基金; 加拿大自然科学与工程研究理事会;

关键词：

Neutrons - Phase space methods;

D O I：

10.1103/PhysRevLett.132.182502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The observation of neutrinoless double-beta (0 nu beta beta) decay would offer proof of lepton number violation, demonstrating that neutrinos are Majorana particles, while also helping us understand why there is more matter than antimatter in the Universe. If the decay is driven by the exchange of the three known light neutrinos, a discovery would, in addition, link the observed decay rate to the neutrino mass scale through a theoretical quantity known as the nuclear matrix element (NME). Accurate values of the NMEs for all nuclei considered for use in 0 nu beta beta experiments are therefore crucial for designing and interpreting those experiments. Here, we report the first comprehensive ab initio uncertainty quantification of the 0 nu beta beta-decay NME, in the key nucleus Ge-76. Our method employs nuclear strong and weak interactions derived within chiral effective field theory and recently developed many-body emulators. Our result, with a conservative treatment of uncertainty, is an NME of 2.60(-1.36)(+1.28), which, together with the best-existing half-life sensitivity and phase-space factor, sets an upper limit for effective neutrino mass of 187(-62)(+205) meV. The result is important for designing next-generation germanium detectors aiming to cover the entire inverted hierarchy region of neutrino masses.

引用

页数：8

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