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SUMMARY:First results of GERDA Phase II and consistency with background mo
 dels
DTSTART;VALUE=DATE-TIME:20161012T140000Z
DTEND;VALUE=DATE-TIME:20161012T141500Z
DTSTAMP;VALUE=DATE-TIME:20260720T215601Z
UID:indico-contribution-531@cern.ch
DESCRIPTION:Speakers: Andrey Chernogorov (FSBI SSC RF ITEP)\nThe GERDA (GE
 Rmanium Detector Array) is an experiment for the search of neutrinoless do
 uble beta decay (0νββ) in Ge-76\, located at Laboratori Nazionali del G
 ran Sasso of INFN (Italy). GERDA operates bare high purity germanium detec
 tors submersed in liquid Argon (LAr). Phase II of data-taking started in D
 ec 2015 and is currently ongoing.\n In Phase II 35 kg of germanium detecto
 rs enriched in Ge-76 including thirty newly produced Broad Energy Germaniu
 m (BEGe) detectors is operating to reach an exposure of 100 kg•yr. The d
 esign goal of Phase II is to reduce the background by one order of magnitu
 de to get the sensitivity for T0ν1/2 = O(10^26) yr. To achieve the necess
 ary background reduction\, the setup was complemented with LAr veto.\nAnal
 ysis of the background spectrum of Phase II demonstrates consistency with 
 the background models. Furthermore Ra-226 and Th-232 contamination levels 
 consistent with screening results.\nIn the first Phase II data release we 
 found no hint for a 0νββ decay signal and place a limit of this process
  T0ν1/2(Ge) > 5.2•10^25 yr (90% C.L.\, sensitivity 4.0•10^25 yr). Fir
 st results of GERDA Phase II will be presented.\n\nhttps://indico.particle
 .mephi.ru/event/4/contributions/531/
LOCATION:Milan Hotel Vivaldi-Boccerini
URL:https://indico.particle.mephi.ru/event/4/contributions/531/
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