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SUMMARY:Severo Ochoa Seminar: Testing DAMA/LIBRA result with ANAIS-112 exp
 eriment at the Canfranc Underground Laboratory
DTSTART;VALUE=DATE-TIME:20190510T100000Z
DTEND;VALUE=DATE-TIME:20190510T110000Z
DTSTAMP;VALUE=DATE-TIME:20260411T152917Z
UID:indico-event-3679@indico.ific.uv.es
DESCRIPTION:DAMA/LIBRA observation of an annual modulation in the detectio
 n rate compatible with that expected for dark matter particles in the Milk
 y Way’s halo is for about two decades one of the most puzzling experimen
 tal results in the field. It has neither been confirmed nor ruled out in a
  model independent way\, despite the impressive improvement in sensitivity
  in dark matter direct detection experiments based on new detector technol
 ogies combined with strong background suppression. ANAIS experiment\, usin
 g 112.5 kg of sodium iodide as target\, is taking data at the Canfranc Und
 erground Laboratory in Spain since August 2017 aiming at testing the obser
 vation by the DAMA/LIBRA experiment using the same target and technique. 
  \n\nThe first model independent testing of this result has just been pre
 sented [1]: 1.5 years from ANAIS-112 experiment have been analyzed searchi
 ng for modulation. Results are compatible with the absence of modulation a
 nd incompatible with DAMA/LIBRA signal at 90% C.L.\; in particular\, the b
 est fits for the modulation hypothesis give amplitudes Sm=-0.0044±0.0058 
 cpd/kg/keV and -0.0015±0.0063 cpd/kg/keV for the [2-6] and [1-6] keV ener
 gy regions\, respectively. These results are in agreement with our estimat
 ed sensitivity for the accumulated exposure\, supporting our projected goa
 l of reaching a 3σ sensitivity to the DAMA/LIBRA result in 3.5 more years
  of data-taking. Before unblinding the data\, the whole analysis procedure
  was fixed [2]\, the background of the experiment thoroughly studied [3] a
 nd the expected sensitivity for the five-year operation evaluated [4].\n\n
 In this seminar\, after posing the DAMA/LIBRA conundrum\, the ANAIS-112 ex
 periment will be firstly described presenting the set-up\, performance\, a
 nalysis methods and background model developed. Then\, the obtained result
 s from the annual modulation analysis will be shown and their implications
  and the future prospects will be discussed.\n\n[1] First results on dark 
 matter annual modulation from ANAIS-112 experiment\, J. Amaré et al\, ht
 tp://arxiv.org/abs/1903.03973  (submitted for publication in Phys. Rev. L
 ett.) \n[2] Performance of ANAIS-112 experiment after the first year of d
 ata taking\, J. Amaré et al\, Eur. Phys. J. C (2019) 79:228\, http://arx
 iv.org/abs/1812.01472 \n[3] Analysis of backgrounds for the ANAIS-112 dar
 k matter experiment\, J. Amaré et al\, http://arxiv.org/abs/1812.01377 
  (review in progress for publication in Eur. Phys. J. C) \n[4] ANAIS-112 
 sensitivity in the search for dark matter annual modulation\, I. Coarasa e
 t al\, Eur. Phys. J. C (2019) 79:223\, http://arxiv.org/abs/1812.02000 \
 n\nhttps://indico.ific.uv.es/event/3679/
LOCATION:Campus Burjassot 4-4-4426 - Seminari Física Teòrica
URL:https://indico.ific.uv.es/event/3679/
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