Final results of the PICASSO dark matter search experiment

Behnke, E.; Besnier, M.; Bhattacharjee, Pijushpani; Dai, Xiongxin; Das, Mala; Davour, Anna; Debris, F.; Dhungana, N.; Farine, J.; Fines-Neuschild, M.; Gagnebin, S.; Giroux, G.; Grace, E.; Jackson, C. M.; Kamaha, A.; Krauss, C. B.; Lafrenière, M.; Laurin, Mathias; Lawson, I.; Lessard, L.; Levine, I.; Marlisov, D.; Martín, J. P.; Mitra, P.; Noble, A. J.; Plante, A.; Podviyanuk, R.B.; Pospı́šil, S.; Scallon, O.; Seth, S.; Starinski, N.; Štekl, I.; Wichoski, U.; Zacek, V.

doi:10.1016/j.astropartphys.2017.02.005

Cited by 113 publications

(132 citation statements)

References 58 publications

(85 reference statements)

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“…For both, the median (90% C.L.) (thick black solid curve) upper limit from CDMSlite Run 2 is compared to other selected direct-detection limits from PANDAX-II (thick-green dotted curve) [61], LUX (thick-green dotdashed curve) [62], XENON100 (thick-green dashed curve) [63], PICO-60 (magenta upward triangles) [64], PICO-2L (magenta downward triangles) [65], PICASSO (purple dot-dashed band) [66], CDEX-0 (thin-red dashed curve) [67,68], and CDEX-1 (thin-red solid curve) [68]. The orange band surrounding the Run 2 result is the 95% uncertainty interval on the upper limit.…”

Section: Fig 32mentioning

confidence: 99%

Low-mass dark matter search with CDMSlite

Agnese¹,

Anderson²,

Aralis³

et al. 2018

Phys. Rev. D

224

265

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The SuperCDMS experiment is designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy. During its operation at the Soudan Underground Laboratory, germanium detectors were run in the CDMSlite mode to gather data sets with sensitivity specifically for WIMPs with masses <10 GeV=c 2 . In this mode, a higher detector-bias voltage is applied to amplify the phonon signals produced by drifting charges. This paper presents studies of the experimental noise and its effect on the achievable energy threshold, which is demonstrated to be as low as 56 eV ee (electron equivalent energy). The detector-biasing configuration is described in detail, with analysis corrections for voltage variations to the level of a few percent. Detailed studies of the electric-field geometry, and the resulting successful development of a fiducial parameter, eliminate poorly measured events, yielding an energy resolution ranging from ∼9 eV ee at 0 keV to 101 eV ee at ∼10 keV ee . New results are derived for astrophysical uncertainties relevant to the WIMP-search limits, specifically examining how they are affected by variations in the most probable WIMP velocity and the Galactic escape velocity. These variations become more important for WIMP masses below 10 GeV=c 2 . Finally, new limits on spin-dependent low-mass WIMP-nucleon interactions are derived, with new parameter space excluded for WIMP masses ≲3 GeV=c 2 .

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Section: Fig 32mentioning

confidence: 99%

Low-mass dark matter search with CDMSlite

Agnese¹,

Anderson²,

Aralis³

et al. 2018

Phys. Rev. D

224

265

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“…where we have used Eqs. (33) and (39). We see that the number of target CO molecules, and hence the DM sensitivity, is independent of the partial pressure of CO.…”

Section: B Co-quench Signalmentioning

confidence: 74%

Direct detection of nuclear scattering of sub-Gev dark matter using molecular excitations

Essig

Pérez‐Ríos

Ramani

et al. 2019

Phys. Rev. Research

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We propose a novel direct detection concept to search for dark matter with 100 keV to 100 MeV masses. Such dark matter can scatter off molecules in a gas and transfer an O(1) fraction of its kinetic energy to excite a vibrational and rotational state. The excited ro-vibrational mode relaxes rapidly and produces a spectacular multi-infrared-photon signal, which can be observed with ultrasensitive photodetectors. We discuss in detail a gas target consisting of carbon monoxide molecules, which enable efficient photon emission even at a relatively low temperature and high vapor pressure. The emitted photons have an energy in the range 180 meV to 265 meV. By mixing together carbon monoxide molecules of different isotopes, including those with an odd number of neutrons, we obtain sensitivity to both spin-independent interactions and spin-dependent interactions with the neutron. We also consider hydrogen fluoride, hydrogen bromide, and scandium hydride molecules, which each provide sensitivity to spin-dependent interactions with the proton. The proposed detection concept can be realized with near-term technology and allows for the exploration of orders of magnitude of new dark matter parameter space.

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“…where ∆ p u = 0.84, ∆ p d = −0.44 and ∆ p s = −0.03 [23]. We plot the spin-dependent cross section (21) in Fig.2 in the allowed range (17) Direct search experiments like COUPP [22], SIMPLE [24], XENON100 [25], PICO-2L [26], PICO-60 [27], PandaX-II [28], PICASSO [29] and LUX [30] have put stringent upper limits on the spin-dependent cross section of dark matter and SM particles. They mainly exclude the WIMPs.…”

Section: Geometric Dark Mattermentioning

confidence: 99%

Geometric dark matter

Demir

Puliçe

2020

J. Cosmol. Astropart. Phys.

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The dark matter, needed for various phenomena ranging from flat rotation curves to structure formation, seems to be not only neutral and long-living but also highly secluded from the ordinary matter. Here we show that, metric-affine gravity, which involves metric tensor and affine connection as two independent fields, dynamically reduces, in its minimal form, to the usual gravity plus a massive vector field. The vector Y µ , which interacts with only the quarks, leptons and gravity, is neutral and long-living (longer than the age of the Universe) when its mass range lies in the range 9.4 MeV < M Y < 28.4 MeV. Its scattering cross section from nucleons, which is some 60 orders of magnitude below the current bounds, is too small to facilitate direct detection of the dark matter. This property provides an explanation for whys and hows of dark matter searches. We show that due to its geometrical origin the Y µ does not couple to scalars and gauge bosons. It couples only to fermions. This very feature of the Y µ makes it fundamentally different than all the other vector dark matter candidates in the literature. The geometrical dark matter we present is minimal and self-consistent not only theoretically but also astrophysically in that its feebly interacting nature is all that is needed for its longevity. * Dedicated to the memory of Rahmi Güven, a great physicist and a candid friend.

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Final results of the PICASSO dark matter search experiment

Cited by 113 publications

References 58 publications

Low-mass dark matter search with CDMSlite

Low-mass dark matter search with CDMSlite

Direct detection of nuclear scattering of sub-Gev dark matter using molecular excitations

Geometric dark matter

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