First Search for Bosonic Superweakly Interacting Massive Particles with Masses up to 
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 with GERDA

Agostini, M.; Bakalyarov, A. M.; Balata, M.; Барабанов, И. Р.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Borowicz, D.; Bossio, E.; Bothe, V.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Comellato, T.; D’Andrea, V.; Demidova, É. V.; Marco, N. Di; Doroshkevich, E.; Egorov, V.; Fischer, F.; Fomina, M.; Gangapshev, A. M.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hemmer, S.; Hiller, R.; Hofmann, W.; Hult, M.; Инжечик, Л. В.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kazalov, V. V.; Kermaïdic, Y.; Khushbakht, H.; Kihm, T.; Kirpichnikov, I. V.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Krause, P.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Лубсандоржиев, Б.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Panas, K.; Pandola, L.; Pelczar, K.; Pertoldi, L.; Piseri, P.; Pullia, A.; Ransom, C.; Rauscher, L.; Riboldi, S.; Rumyantseva, N.; Sada, Cinzia; Salamida, F.; Schönert, S.; Schreiner, J.; Schütt, M.; Schütz, A.-K.; Schulz, O.; Schwarz, M.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stukov, D.; Vasenko, A. A.; Veresnikova, A.; Vignoli, C.; Sturm, K. von; Wester, T.; Wiesinger, Christoph; Wójcik, Marcin; Yanovich, E.; Zatschler, Birgit; Zhitnikov, I.; Жуков, С. В.; Zinatulina, D.; Zschocke, A.; Zsigmond, Anna Julia; Zuber, Κ.; Zuzel, G.

doi:10.1103/physrevlett.125.011801

Cited by 28 publications

(14 citation statements)

References 26 publications

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“…Indeed, high-energy γs that accompany these x-rays were not observed, and with their OðcmÞ mean free path in LXe they could not have left the OðmÞ-sized TPC undetected. For these reasons, we conclude that 127 Xe was no longer present during SR1.…”

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confidence: 77%

“…are shown in black with the expected 1 (2) σ sensitivities in green (yellow). Limits from other detectors or astrophysical constraints are also shown for both the pseudoscalar and vector cases[53,84,85,[121][122][123][124][125][126][126][127][128].FIG. 11.…”

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confidence: 98%

“…Xe EC, as seen in [84,85], are ruled out for a number of reasons. 127 Xe is produced from cosmogenic activation at sea level; given the short half-life of 36.4 days and the fact that the xenon gas was underground for OðyearsÞ before the operation of XENON1T, 127 Xe would have decayed to a negligible level. Indeed, high-energy γs that accompany these x-rays were not observed, and with their OðcmÞ mean free path in LXe they could not have left the OðmÞ-sized TPC undetected.…”

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confidence: 99%

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Excess electronic recoil events in XENON1T

Aprile¹,

Aalbers²,

Agostini³

et al. 2020

Phys. Rev. D

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556

745

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We report results from searches for new physics with low-energy electronic recoil data recorded with the XENON1T detector. With an exposure of 0.65 tonne-years and an unprecedentedly low background rate of 76 AE 2 stat events=ðtonne × year × keVÞ between 1 and 30 keV, the data enable one of the most sensitive searches for solar axions, an enhanced neutrino magnetic moment using solar neutrinos, and bosonic dark matter. An excess over known backgrounds is observed at low energies and most prominent between 2 and 3 keV. The solar axion model has a 3.4σ significance, and a three-dimensional 90% confidence surface is reported for axion couplings to electrons, photons, and nucleons. This surface is inscribed in the cuboid defined by g ae < 3.8 × 10 −12 , g ae g eff an < 4.8 × 10 −18 , and g ae g aγ < 7.7 × 10 −22 GeV −1 , and excludes either g ae ¼ 0 or g ae g aγ ¼ g ae g eff an ¼ 0. The neutrino magnetic moment signal is similarly favored over background at 3.2σ, and a confidence interval of μ ν ∈ ð1.4; 2.9Þ × 10 −11 μ B (90% C.L.) is reported. Both results are in strong tension with stellar constraints. The excess can also be explained by β decays of tritium at 3.2σ significance with a corresponding tritium concentration in xenon of ð6.2 AE 2.0Þ × 10 −25 mol=mol. Such a trace amount can neither be confirmed nor excluded with current knowledge of its production and reduction mechanisms. The significances of the solar axion and neutrino magnetic moment hypotheses are decreased to 2.0σ and 0.9σ, respectively, if an unconstrained tritium component is included in the fitting. With respect to bosonic dark matter, the excess favors a monoenergetic peak at ð2.3 AE 0.2Þ keV (68% C.L.) with a 3.0σ global (4.0σ local) significance over background. This analysis sets the most restrictive direct constraints to date on pseudoscalar and vector bosonic dark matter for most masses between 1 and 210 keV=c 2. We also consider the possibility that 37 Ar may be present in the detector, yielding a 2.82 keV peak from electron capture. Contrary to tritium, the 37 Ar concentration can be tightly constrained and is found to be negligible.

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confidence: 77%

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confidence: 98%

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confidence: 99%

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Excess electronic recoil events in XENON1T

Aprile¹,

Aalbers²,

Agostini³

et al. 2020

Phys. Rev. D

Self Cite

556

745

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“…In addition to standard 0νββ searches, GERDA explored other physics topics such as the search for bosonic superweakly interacting massive particles (super-WIMPs) as keV-scale dark matter candidates [78], the search for 0νββ decay processes accompanied with Majoron emission [79] and the study of two-neutrino double beta decay of 76 Ge to excited states of 76 Se [80].…”

Section: Statistical Analysis and 0νββ Resultsmentioning

confidence: 99%

Neutrinoless Double Beta Decay with Germanium Detectors: 1026 yr and Beyond

et al. 2021

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In the global landscape of neutrinoless double beta (0νββ) decay search, the use of semiconductor germanium detectors provides many advantages. The excellent energy resolution, the negligible intrinsic radioactive contamination, the possibility of enriching the crystals up to 88% in the 76Ge isotope as well as the high detection efficiency, are all key ingredients for highly sensitive 0νββ decay search. The Majorana and Gerda experiments successfully implemented the use of germanium (Ge) semiconductor detectors, reaching an energy resolution of 2.53 ± 0.08 keV at the Qββ and an unprecedented low background level of 5.2×10−4 cts/(keV·kg·yr), respectively. In this paper, we will review the path of 0νββ decay search with Ge detectors from the original idea of E. Fiorini et al. in 1967, to the final recent results of the Gerda experiment setting a limit on the half-life of 76Ge 0νββ decay at T1/2>1.8×1026 yr (90% C.L.). We will then present the LEGEND project designed to reach a sensitivity to the half-life up to 1028 yr and beyond, opening the way to the exploration of the normal ordering region.

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“…Axionlike particles (ALPs) are pseudo-scalar remnants of broken symmetries, and appear frequently in theories beyond the Standard Model. ALPs can comprise the dark matter for a broad range of masses, and over the past few years, several dark matter 'direct detection' experiments (as well as experiments designed to observe neutrinoless double-β decays), have published limits on 'heavy' ALP dark matter with masses in the keV-MeV range [1][2][3][4][5][6][7][8]. An important assumption of these experimental searches is the existence of a galactic density of dark matter particles that can interact with the detector.…”

Section: Introductionmentioning

confidence: 99%

Do direct detection experiments constrain axionlike particles coupled to electrons?

Ferreira,

Marsh,

Müller

2022

Preprint

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Several laboratory experiments have published limits on axionlike particles (ALPs) with feeble couplings to electrons and masses in the keV-MeV range, under the assumption that such ALPs comprise the dark matter. We note that ALPs decay radiatively into photons, and show that for a large subset of the parameter space ostensibly probed by these experiments, the lifetime of the ALPs is shorter than the age of the universe. Such ALPs cannot consistently make up the dark matter, which significantly affects the interpretation of published limits from GERDA, Edelweiss-III, SuperCDMS and Majorana. Moreover, constraints from X-ray and gamma-ray astronomy exclude an even wider range of the ALP-electron coupling, and supersede all current laboratory limits on dark matter ALPs in the 6 keV to 1 MeV mass range. These conclusions are rather model-independent, and can only be avoided at the expense of significant fine-tuning in theories where the ALP has additional couplings to other particles.

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First Search for Bosonic Superweakly Interacting Massive Particles with Masses up to 1 MeV/c2 with GERDA

Cited by 28 publications

References 26 publications

Excess electronic recoil events in XENON1T

Excess electronic recoil events in XENON1T

Neutrinoless Double Beta Decay with Germanium Detectors: 1026 yr and Beyond

Do direct detection experiments constrain axionlike particles coupled to electrons?

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