Abstract
Axions were originally proposed to explain the strong-CP problem in QCD. Through axion-photon coupling, the Sun could be a major source of axions, which could be measured in solid state detection experiments with enhancements due to coherent Primakoff-Bragg scattering. The Majorana Demonstrator experiment has searched for solar axions with a set of Ge76-enriched high purity germanium detectors using a 33 kg-yr exposure collected between January, 2017 and November, 2019. A temporal-energy analysis gives a new limit on the axion-photon coupling as gaγ<1.45×10-9 GeV-1 (95% confidence level) for axions with mass up to 100 eV/c2. This improves laboratory-based limits between about 1 eV/c2 and 100 eV/c2.
| Original language | English |
|---|---|
| Article number | 081803 |
| Journal | Physical Review Letters |
| Volume | 129 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 19 2022 |
Funding
This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contracts or Awards No. DE-AC02-05CH11231, No. DE-AC05-00OR22725, No. DE-AC05-76RL0130, No. DE-FG02-97ER41020, No. DE-FG02-97ER41033, No. DE-FG02-97ER41041, No. DE-SC0012612, No. DE-SC0014445, No. DE-SC0018060, and No. LANLEM77/LANLEM78. We acknowledge support from the Particle Astrophysics Program and Nuclear Physics Program of the National Science Foundation through Grants No. MRI-0923142, No. PHY-1003399, No. PHY-1102292, No. PHY-1206314, No. PHY-1614611, No. PHY-1812409, No. PHY-1812356, and No. PHY-2111140. We gratefully acknowledge the support of the Laboratory Directed Research & Development (LDRD) program at Lawrence Berkeley National Laboratory for this work. We gratefully acknowledge the support of the U.S. Department of Energy through the Los Alamos National Laboratory LDRD Program and through the Pacific Northwest National Laboratory LDRD Program for this work. We gratefully acknowledge the support of the South Dakota Board of Regents Competitive Research Grant. We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada, funding reference number SAPIN-2017-00023, and from the Canada Foundation for Innovation John R. Evans Leaders Fund. This research used resources provided by the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory and by the National Energy Research Scientific Computing Center, a U.S. Department of Energy Office of Science User Facility located at Lawrence Berkeley National Laboratory. We thank our hosts and colleagues at the Sanford Underground Research Facility for their support.
| Funders | Funder number |
|---|---|
| Canada Foundation for Innovation John R. Evans Leaders Fund | |
| National Science Foundation | PHY-1003399, PHY-1812409, PHY-1206314, PHY-1614611, PHY-1102292, PHY-1812356, MRI-0923142, PHY-2111140 |
| U.S. Department of Energy | |
| Office of Science | |
| Nuclear Physics | DE-AC05-00OR22725, DE-AC05-76RL0130, DE-AC02-05CH11231, DE-SC0012612, DE-FG02-97ER41020, DE-FG02-97ER41033, LANLEM77/LANLEM78, DE-FG02-97ER41041, DE-SC0018060, DE-SC0014445 |
| Oak Ridge National Laboratory | |
| Lawrence Berkeley National Laboratory | |
| Laboratory Directed Research and Development | |
| South Dakota Board of Regents | |
| Los Alamos National Laboratory | |
| National Energy Research Scientific Computing Center | |
| Natural Sciences and Engineering Research Council of Canada | SAPIN-2017-00023 |