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Title: Searching for long-lived particles: A compact detector for exotics at LHCb

We advocate for the construction of a new detector element at the LHCb experiment, designed to search for displaced decays of beyond Standard Model long-lived particles, taking advantage of a large shielded space in the LHCb cavern that is expected to soon become available. We discuss the general features and putative capabilities of such an experiment, as well as its various advantages and complementarities with respect to the existing LHC experiments and proposals such as SHiP and MATHUSLA. For two well-motivated beyond Standard Model benchmark scenarios—Higgs decay to dark photons and B meson decays via a Higgs mixing portal—the reach either complements or exceeds that predicted for other LHC experiments.
 [1] ;  [2] ;  [2] ;  [3]
  1. Paris Diderot Univ. (France). CNRS/IN2P3. Lab. of Nuclear and High Energy Physics (LPNHE)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Physics
  3. Univ. of Cincinnati, OH (United States). Physics Dept.
Publication Date:
Grant/Contract Number:
AC02-05CH11231; 724777; PHY-1002399; PHY-1316783; PHY-1066293
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 1; Journal ID: ISSN 2470-0010
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Paris Diderot Univ. (France)
Sponsoring Org:
USDOE Office of Science (SC); LBNL Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); European Research Council (ERC)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; rare decays; particle detectors
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1435096