New Detectors to Explore the Lifetime Frontier

By J. Chou, D. Curtin, H. Lubatti. 2016

293 citations recorded by the source corpus.

Abstract Long-lived particles (LLPs) are a common feature in many beyond the Standard Model theories, including supersymmetry, and are generically produced in exotic Higgs decays. Unfortunately, no existing or proposed search strategy will be able to observe the decay of non-hadronic electrically neutral LLPs with masses above ∼ GeV and lifetimes near the limit set by Big Bang Nucleosynthesis (BBN), c τ ≲ 10 7 – 10 8 m . We propose the MATHUSLA surface detector concept (MAssive Timing Hodoscope for Ultra Stable neutraL pArticles), which can be implemented with existing technology and in time for the high luminosity LHC upgrade to find such ultra-long-lived particles (ULLPs), whether produced in exotic Higgs decays or more general production modes. We also advocate a dedicated LLP detector at a future 100 TeV collider, where a modestly sized underground design can discover ULLPs with lifetimes at the BBN limit produced in sub-percent level exotic Higgs decays.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/92057c3b798150a3466bca4e7761aad4c952232d

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

Citations in the corpus

Beyond the Standard Model Physics at the HL-LHC and HE-LHC (2018, methodology): “The Beyond Collider experiments are AL3X (A Laboratory for Long-Lived eXotics) [319], CODEX-b (COmpact Detector for EXotics at LHCb) [320], FASER (ForwArd Search ExpeRiment) [321–323], milliQan [324,325], MATHUSLA (MAssive Timing Hodoscope for Ultra Stable neutraL pArticles) [326,327], and SHiP (Sea”
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, methodology): “We refer the reader to [103] for more details.”
Collider probes of axion-like particles (2017, background): “Very light or very weakly coupled ALPs can predominantly decay outside the detector and could either be observed by a future surface detector specifically designed to search for long-lived particles (MATHUSLA) [50, 51] or through missing-energy signatures, which can be probed using mono-X searches, ”
Physics beyond colliders at CERN: beyond the Standard Model working group report (2019, background): “The same mass range could also be probed by a FASER2 [85], CODEX-b [115] and MATHUSLA200 [97].”
Axion-like particles at future colliders (2018, methodology): “In this work we also consider proposed new experiments searching for long-lived particles, such as FASER [56], Codex-B [57] and MATHUSLA [58], which can access the ALP parameter space between the regions covered by LHC experiments and bounds from cosmology.”
Neutrinoless double beta decay versus other probes of heavy sterile neutrinos (2019, background): “These include AL3X [73], CODEX-b [74], FASER2 [75], MATHUSLA [76] and the MoEDAL experiment’s MAPP detector [77].”
Higgs Physics at the HL-LHC and HE-LHC (2019, background): “Projections for dedicated searches as well as proposals for dedicated detectors at the LHC complex [550, 551, 552] are not discussed in this section.”
Expression of interest for the CODEX-b detector (2019, result): “Finally, proposals for shielded, transverse, background-free detectors such MATHUSLA [14], CODEX-b [15] and AL3X [16] aim to operate at relatively low pseudorapidity η, but with far greater shielding compared to the ATLAS and CMS muon systems.”
Refined bounds on MeV-scale thermal dark sectors from BBN and the CMB (2019, background): “Future, ongoing and planned experiments are expected to cut into relevant regions of parameter space and perhaps yield a signal [14–17, 85–89].”