Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90072%2F16%3A00344173" target="_blank" >RIV/68407700:90072/16:00344173 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1475-7516/2016/05/019" target="_blank" >https://doi.org/10.1088/1475-7516/2016/05/019</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1475-7516/2016/05/019" target="_blank" >10.1088/1475-7516/2016/05/019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Popis výsledku v původním jazyce

We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4-30 GeV/c(2) mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for similar to 2.5-20 keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/c(2) WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of 4.3 x 10(-4)0 cm(2) (resp. 9.4 x 10(-44) cm(2)) is set on the spin-independent WIMP-nucleon scattering cross-section for 5 (resp. 20) GeV/c(2) WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/c(2) WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.

Název v anglickém jazyce

Constraints on low-mass WIMPs from the EDELWEISS-III dark matter search

Popis výsledku anglicky

We present the results of a search for elastic scattering from galactic dark matter in the form of Weakly Interacting Massive Particles (WIMPs) in the 4-30 GeV/c(2) mass range. We make use of a 582 kg-day fiducial exposure from an array of 800 g Germanium bolometers equipped with a set of interleaved electrodes with full surface coverage. We searched specifically for similar to 2.5-20 keV nuclear recoils inside the detector fiducial volume. As an illustration the number of observed events in the search for 5 (resp. 20) GeV/c(2) WIMPs are 9 (resp. 4), compared to an expected background of 6.1 (resp. 1.4). A 90% CL limit of 4.3 x 10(-4)0 cm(2) (resp. 9.4 x 10(-44) cm(2)) is set on the spin-independent WIMP-nucleon scattering cross-section for 5 (resp. 20) GeV/c(2) WIMPs. This result represents a 41-fold improvement with respect to the previous EDELWEISS-II low-mass WIMP search for 7 GeV/c(2) WIMPs. The derived constraint is in tension with hints of WIMP signals from some recent experiments, thus confirming results obtained with different detection techniques.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10303 - Particles and field physics

Projekt

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Návaznosti

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Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

ISSN

1475-7516

e-ISSN

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Svazek periodika

—

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

21

Strana od-do

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Kód UT WoS článku

000378041500020

EID výsledku v databázi Scopus

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