Improved Limit on Neutrinoless Double Beta Decay of Mo 100 from AMoRE-I

Improved Limit on Neutrinoless Double Beta Decay of Mo 100 from AMoRE-I Full article

Journal

Physical Review Letters
ISSN: 1079-7114 , E-ISSN: 0031-9007

Output data

Year: 2025, Volume: 134, Number: 8, Article number : 082501, Pages count : 8 DOI: 10.1103/PhysRevLett.134.082501

Authors

Agrawal A. ¹ , Aryal P. ² , Bhandari B. ³ , Boonin K. ⁴ , Chanthima N. ⁴ , Gileva O. ⁵ , Grigorieva V.D. ⁶ , Makarov E.P. ⁶ , Oh Y. ⁵ , Shlegel V.N. ⁶ , at al (109 authors in total) . ⁷

Affiliations

1	Indian Institute of Science
2	Minnesota State University, Mankato
3	Far Western University, Nepal
4	Nakhon Pathom Rajabhat University
5	Institute for Basic Science, CUP
6	Nikolaev Institute of Inorganic Chemistry SB RAS
7	AMoRE Collaboration

AMoRE searches for the neutrinoless double beta decay using 100 kg of enriched ^{100}Mo. Scintillating molybdate crystals coupled with a metallic magnetic calorimeter operate at milli-Kelvin temperatures to measure the energy of electrons emitted in the decay. AMoRE-I is a demonstrator for the full-scale AMoRE, operated at the Yangyang Underground Laboratory for over two years. The exposure was 8.02 kg year (or 3.89 kg_{^{100}Mo} year), and the total background rate near the Q value was 0.025±0.002 counts/keV/kg/year. We observed no indication of 0νββ decay and report a new lower limit of the half-life of ^{100}Mo 0νββ decay as T_{1/2}^{0ν}>2.9×10^{24} yr at 90% confidence level. The effective Majorana mass limit range is m_{ββ}<(210-610) meV using nuclear matrix elements estimated in the framework of different models, including the recent shell model calculations.

Agrawal A. , Aryal P. , Bhandari B. , Boonin K. , Chanthima N. , Gileva O. , Grigorieva V.D. , Makarov E.P. , Oh Y. , Shlegel V.N. , at al (109 authors in total)
Improved Limit on Neutrinoless Double Beta Decay of Mo 100 from AMoRE-I
Physical Review Letters. 2025. V.134. N8. 082501 :1-8. DOI: 10.1103/PhysRevLett.134.082501

Submitted:	Jul 8, 2024
Accepted:	Jan 13, 2025
Published print:	Feb 27, 2025

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