“The UCSB Physics Department has a long history of devising searches for dark matter, starting with one of the first published results of a search in 1988,” Nelson said. Previous faculty members include David Caldwell (now deceased), and Michael Witherell, now director of the Lawrence Berkeley Laboratory. David Hale (now retired) pioneered many of the techniques for suppressing fake dark matter signals which are now employed throughout the field of dark matter searches. “UCSB, through the Physics Department, the College of Letters and Science, the administration, and through private donations, has strongly supported the dark matter effort for decades, and made substantial contributions to LZ.”
LZ is a collaboration of roughly 250 scientists from 38 institutions in the United States, United Kingdom, Portugal, Switzerland, South Korea, and Australia; much of the work building, operating, and analyzing the record-setting experiment is done by early career researchers. The collaboration is already looking forward to analyzing the next data set and using new analysis tricks to look for even lower-mass dark matter. Scientists are also thinking through potential upgrades to further improve LZ, and planning for a next-generation dark matter detector called XLZD.
LZ is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics and the National Energy Research Scientific Computing Center, a DOE Office of Science user facility. LZ is also supported by the Science & Technology Facilities Council of the United Kingdom; the Portuguese Foundation for Science and Technology; the Swiss National Science Foundation, and the Institute for Basic Science, Korea. More than 38 institutions of higher education and advanced research provided support to LZ. The assistance of the Sanford Underground Research Facility has at all times been critical for UCSB efforts to LZ.