The Present and Future of Searching for Dark Matter with LUX and LZ

Szydagis, M.; collaborations, LZ

doi:10.22323/1.282.0220

Cited by 28 publications

(45 citation statements)

References 61 publications

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“…[62] and the S2 efficiency from Ref. [65]; we allow events that satisfy S1 raw > 1 phd, S2 raw > 200 phd. We set an exclusion limit with events measured more than 1 cm from the radial fiducial volume boundary.…”

Section: Lux and Lz Detector Simulationsmentioning

confidence: 99%

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New constraints and discovery potential of sub-GeV dark matter with xenon detectors

McCabe

2017

Phys. Rev. D

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Existing xenon dark matter (DM) direct detection experiments can probe the DM-nucleon interaction of DM with a sub-GeV mass through a search for photon emission from the recoiling xenon atom. We show that LUX's constraints on sub-GeV DM, which utilise the scintillation (S1) and ionisation (S2) signals, are approximately three orders of magnitude more stringent than previous xenon constraints in this mass range, derived from the XENON10 and XENON100 S2-only searches. The new LUX constraints provide the most stringent direct detection constraints for DM particles with a mass below 0.5 GeV. In addition, the photon emission signal in LUX and its successor LZ maintain the discrimination between background and signal events so that an unambiguous discovery of sub-GeV DM is possible. We show that LZ has the potential to reconstruct the DM mass with 20% accuracy for particles lighter than 0.5 GeV.

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Section: Lux and Lz Detector Simulationsmentioning

confidence: 99%

“…Additionally, for the WS2013 search we include a component for the decays of 127 Xe, which contributed in WS2013 but not in WS2014-16. This simple model provides a good fit to LUX data [67,68] (a comparison is provided in Appendix C). The 90% C.L.…”

Section: Lux Constraintsmentioning

confidence: 99%

New constraints and discovery potential of sub-GeV dark matter with xenon detectors

McCabe

2017

Phys. Rev. D

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“…[13]. In any case, the recent prospects exposed by the LUX [14] and FERMI [15] collaborations showed that the WIMP paradigm should be excluded (or discovered) for dark matter masses below 10 TeV in the present generation of detectors.…”

Section: Introductionmentioning

confidence: 99%

Minimal model of gravitino dark matter

et al. 2017

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Motivated by the absence of signals of new physics in searches for both new particles at the LHC and a weakly interacting massive particle dark matter candidate, we consider a scenario where supersymmetry is broken at a scale above the reheating temperature. The low-energy particle content then only consists of Standard Model states and a gravitino. We investigate the possibility that the latter provides the main component of dark matter through the annihilation of thermalized Standard Model particles. We focus on the case where its production through scattering in the thermal plasma is well approximated by the nonlinear supersymmetric effective Lagrangian of the associated Goldstino and identify the parameter space allowed by the cosmological constraints, allowing the possibility of a large reheating temperature compatible with leptogenesis scenarios and alleviating the so-called "gravitino problem".

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“…6(a), which satisfies all three constraints, the electroweak vacuum stability condition, the LHC Run-2 bound, and the cosmological constraint from the observed RHN DM relic density. The (red) upper solid (dashed) line shows the XENON1T [108] (LUX 2016 [109]) upper bound on σ SI , and the (red) dotted line shows the prospective reach for the upper bound on σ SI in the LZ DM experiment [110]. Figs.…”

Section: Direct Detection Of Rhn Dmmentioning

confidence: 96%

Right-handed neutrino dark matter in the classically conformal U(1)′ extended standard model

2017

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We consider the dark matter (DM) scenario in the context of the classically conformal U(1) ′ extended standard model (SM), with three right-handed neutrinos (RHNs) and the U(1) ′ Higgs field. The model is free from all the U(1) ′ gauge and gravitational anomalies in the presence of the three RHNs. We introduce a Z 2 -parity in the model, under which an odd-parity is assigned to one RHN, while all the other particles is assigned to be Z 2 -even, and hence the Z 2 -odd RHN serves as a DM candidate. In this model, the U(1) ′ gauge symmetry is radiatively broken through the Coleman-Weinberg mechanism, by which the electroweak symmetry breaking is triggered. There are three free parameters in our model, the U(1) ′ charge of the SM Higgs doublet (x H ), the new U(1) ′ gauge coupling (g X ), and the U(1) ′ gauge boson (Z ′ ) mass (m Z ′ ), which are severely constrained in order to solve the electroweak vacuum instability problem, and satisfy the LHC Run-2 bounds from the search for Z ′ boson resonance. In addition to these constraints, we investigate the RHN DM physics. Because of the nature of classical conformality, we find that a RHN DM pair mainly annihilates into the SM particles through the Z ′ boson exchange. This is the socalled Z ′ -portal DM scenario. Combining the electroweak vacuum stability condition, the LHC Run-2 bounds, and the cosmological constraint from the observed DM relic density, we find that all constrains complementarily work to narrow down the allowed parameter regions, and, especially, exclude m Z ′ 3.5 TeV. For the obtained allowed regions, we calculate the spin-independent cross section of the RHN DM with nucleons. We find that the resultant cross section well below the current experimental upper bounds.

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The Present and Future of Searching for Dark Matter with LUX and LZ

Cited by 28 publications

References 61 publications

New constraints and discovery potential of sub-GeV dark matter with xenon detectors

New constraints and discovery potential of sub-GeV dark matter with xenon detectors

Minimal model of gravitino dark matter

Right-handed neutrino dark matter in the classically conformal U(1)′ extended standard model

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