New Limits on the Coherent Neutrino-Nucleus Elastic Scattering Cross Section at the Kuo-Sheng Reactor-Neutrino Laboratory
Neutrino-nucleus elastic scattering (νA_{el}) with partial quantum-mechanical coherency has been observed in several nuclei with neutrinos from decay-at-rest pions. This interaction with reactor neutrinos where coherency is >95% has not yet been experimentally observed. We present new results on the studies of the νA_{el} cross section with an electrocooled p-type point-contact germanium detector at the Kuo-Sheng Reactor Neutrino Laboratory. A total of 242(357) kg-days of Reactor ON(OFF) data at a detector threshold of 200 eV in ionization energy are analyzed. The Lindhard model parametrized by a single variable k which characterizes the quenching function was used. A limit at 90% confidence level of ρ<4.7 at the predicted value of k=0.162 is derived, where ρ is the ratio of the measured to standard model (SM) cross section. Conversely, k<0.288 at the SM value of ρ=1.
Authors
- L. Singh (ORCID: https://orcid.org/0000-0002-8554-5581)
- F. K. Lin
- S. K. Liu
- V. Singh (ORCID: https://orcid.org/0000-0003-4535-6230)
- C. Greeshma
- Jiatong Li (ORCID: https://orcid.org/0000-0003-3778-5633)
- M. K. Singh (ORCID: https://orcid.org/0000-0001-5055-6128)
- V. Sharma (ORCID: https://orcid.org/0000-0002-5622-3225)
- J. S. Wang
- C. H. Leung (ORCID: https://orcid.org/0000-0001-7907-3728)
- Kapil Saraswat (ORCID: https://orcid.org/0000-0002-1211-5652)
- Chih-Hsiang Yeh (ORCID: https://orcid.org/0000-0003-2255-6539)
- C. I. Chiang
- Hsu‐Cheng Hsu (ORCID: https://orcid.org/0000-0002-3742-1787)
- H. T. Wong (ORCID: https://orcid.org/0000-0003-4145-4394)
- S. Karadaǧ (ORCID: https://orcid.org/0000-0001-6406-3543)
- H. B. Li
- L. T. Yang (ORCID: https://orcid.org/0000-0002-1859-3655)
- D. Tanabe
- S. Karmakar (ORCID: https://orcid.org/0000-0002-4161-3669)
- S. T. Lin (ORCID: https://orcid.org/0009-0006-2980-8857)
- Q. Yue
- M. Deniz (ORCID: https://orcid.org/0000-0002-9781-8241)
- Vineet Kumar (ORCID: https://orcid.org/0000-0001-8694-8326)
- M. Ağartıoğlu
- C. H. Cheng (ORCID: https://orcid.org/0009-0006-5865-4973)
- Haitao Ma (ORCID: https://orcid.org/0000-0002-8930-614X)
Institutions
- Hemwati Nandan Bahuguna Garhwal University (IN)
- Dokuz Eylül University (TR)
- Sichuan University (CN)
- National Dong Hwa University (TW)
- Central University of South Bihar (IN)
- Istanbul Technical University (TR)
- GLA University (IN)
- Banaras Hindu University (IN)
- Tsinghua University (CN)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-03-27
- DOI
- https://doi.org/10.1103/physrevlett.134.121802
- Citations
- 17
- Primary Topic
- Neutrino Physics Research
- Type
- article
- Field-Weighted Citation Impact
- 31.79
Funders
- Academia Sinica