A Novel Antimatter Detector Based on X‐Ray Deexcitation of Exotic Atoms

Mori, Kaya; Hailey, Charles J.; Baltz, Edward A.; Craig, William W.; Kamionkowski, Marc; Serber, W.; Ullio, Piero

doi:10.1086/338057

Cited by 102 publications

(162 citation statements)

References 42 publications

(52 reference statements)

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“…the measured flux is much higher than the predicted one in this energy range. For the antideuterons, we show the expected flux in the energy range 0.1-0.4 GeV, which is reasonable for the proposed GAPS probe [132]. For the antideuterons, there is essentially no background and the sensitivity is thus given by the ability to detect one antideuteron.…”

Section: Benchmark Models In Msugrasupporting

confidence: 73%

“…The positron and antiproton fluxes are generally enhanced as well, but still well below measured fluxes. Finally, there are several models among those we selected which have an antideuteron flux in the energy range 0.1-0.4 GeV exceeding 2.6 × 10 −13 GeV −1 cm −2 s −1 sr −1 , the expected sensitivity of the GAPS detector [132].…”

Section: Benchmark Models In Mssmmentioning

confidence: 99%

See 1 more Smart Citation

DarkSUSY: computing supersymmetric dark matter properties numerically

Gondolo

Edsjö

Ullio

et al. 2004

J. Cosmol. Astropart. Phys.

909

1,059

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The question of the nature of the dark matter in the Universe remains one of the most outstanding unsolved problems in basic science. One of the best motivated particle physics candidates is the lightest supersymmetric particle, assumed to be the lightest neutralino -a linear combination of the supersymmetric partners of the photon, the Z boson and neutral scalar Higgs particles. Here we describe DarkSUSY, a publicly-available advanced numerical package for neutralino dark matter calculations. In DarkSUSY one can compute the neutralino density in the Universe today using precision methods which include resonances, pair production thresholds and coannihilations. Masses and mixings of supersymmetric particles can be computed within DarkSUSY or with the help of external programs such as FeynHiggs, ISASUGRA and SUSPECT. Accelerator bounds can be checked to identify viable dark matter candidates. DarkSUSY also computes a large variety of astrophysical signals from neutralino dark matter, such as direct detection in low-background counting experiments and indirect detection through antiprotons, antideuterons, gamma-rays and positrons from the Galactic halo or high-energy neutrinos from the center of the Earth or of the Sun. Here we describe the physics behind the package. A detailed manual will be provided with the computer package.

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Section: Benchmark Models In Msugrasupporting

confidence: 73%

Section: Benchmark Models In Mssmmentioning

confidence: 99%

DarkSUSY: computing supersymmetric dark matter properties numerically

Gondolo

Edsjö

Ullio

et al. 2004

J. Cosmol. Astropart. Phys.

909

1,059

View full text Add to dashboard Cite

show abstract

“…Indirect detection of neutralinos is also possible via the detection of anti-particles from neutralino annihilations in the galactic halo. Proposed and on-going experiments include searches for positrons [62] (HEAT [63], Pamela [64] and AMS-02 [65]), antiprotons [66] (BESS [67], Pamela, AMS-02) and anti-deuterons (D) (BESS [68], AMS-02, GAPS [69]). For positrons and antiprotons we evaluate the averaged differential antiparticle flux in a projected energy bin centered at a kinetic energy of 20 GeV, where we expect an optimal statistics and signal-to-background ratio at space-borne antiparticle detectors [45,70].…”

Section: Jhep10(2007)088mentioning

confidence: 99%

Mixed higgsino dark matter from a large SU(2) gaugino mass

Baer

Mustafayev

Summy

et al. 2007

J. High Energy Phys.

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We observe that in SUSY models with non-universal GUT scale gaugino mass parameters, raising the GUT scale SU(2) gaugino mass |M 2 | from its unified value results in a smaller value of −m 2Hu at the weak scale. By the electroweak symmetry breaking conditions, this implies a reduced value of µ 2 visà vis models with gaugino mass unification. The lightest neutralino can then be mixed Higgsino dark matter with a relic density in agreement with the measured abundance of cold dark matter (DM). We explore the phenomenology of this high |M 2 | DM model. The spectrum is characterized by a very large wino mass and a concomitantly large splitting between left-and right-sfermion masses. In addition, the lighter chargino and three light neutralinos are relatively light with substantial higgsino components. The higgsino content of the LSP implies large rates for direct detection of neutralino dark matter, and enhanced rates for its indirect detection relative to mSUGRA. We find that experiments at the LHC should be able to discover SUSY over the portion of parameter space where mg < ∼ 2350 − 2750 GeV, depending on the squark mass, while a 1 TeV electron-positron collider has a reach comparable to that of the LHC. The dilepton mass spectrum in multi-jet + ℓ + ℓ − + E miss T events at the LHC will likely show more than one mass edge, while its shape should provide indirect evidence for the large higgsino content of the decaying neutralinos.

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“…Regarding the detection prospects, we will consider, as the ultimate reach for an experiment in the future, that of the gaseous antiparticle spectrometer (GAPS) [61]. This is a proposal for an instrument looking for antideuterons in the energy interval 0.1-0.4 GeV per nucleon, with estimated sensitivity level of 2.6 × 10 −9 m −2 sr −1 GeV −1 s −1 , to be placed either on a satellite orbiting around the earth or on a probe to be sent into deep space.…”

Section: A Case Studymentioning

confidence: 99%

Neutralino dark matter detection in split supersymmetry scenarios

2005

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We study the phenomenology of neutralino dark matter within generic supersymmetric scenarios where the Gaugino and Higgsino masses are much lighter than the scalar soft breaking masses (Split Supersymmetry). We consider a low-energy model-independent approach and show that the guidelines in the definition of this general framework come from cosmology, which forces the lightest neutralino to have a mass smaller than 2.2 TeV. The testability of the framework is addressed by discussing all viable dark matter detection techniques. Current data on cosmic rays antimatter, gamma-rays and on the abundance of primordial 6 Li already set significant constraints on the parameter space. Complementarity among future direct detection experiments, indirect searches for antimatter and with neutrino telescopes, and tests of the theory at future accelerators, such as the LHC and a NLC, is highlighted. In particular, we study in detail the regimes of Wino-Higgsino mixing and Bino-Wino transition, which have been most often neglected in the past. We emphasize that our analysis may apply to more general supersymmetric models where scalar exchanges do not provide the dominant contribution to annihilation rates.

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A Novel Antimatter Detector Based on X‐Ray Deexcitation of Exotic Atoms

Cited by 102 publications

References 42 publications

DarkSUSY: computing supersymmetric dark matter properties numerically

DarkSUSY: computing supersymmetric dark matter properties numerically

Mixed higgsino dark matter from a large SU(2) gaugino mass

Neutralino dark matter detection in split supersymmetry scenarios

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