5-9 October 2020
Online
Europe/Moscow timezone
The conference is over. We would like to thank all participants for their attendance!

Statistical data analysis in the DANSS experiment

9 Oct 2020, 12:00
15m
Neutrino (Zoom)

Neutrino

Zoom

https://zoom.us/j/99423243049
Oral talk Neutrino physics Neutrino Physics

Speaker

Nataliya Skrobova

Description

DANSS is a one cubic meter highly segmented solid scintillator detector. DANSS is placed under a 3 GW industrial reactor at the Kalinin NPP (Russia) on a movable platform. The distance from the reactor core center is varied from 10.9 m to 12.9 m on-line. The inverse beta decay (IBD) process is used to detect antineutrinos. DANSS detects about 5000 IBD events per day with the background from cosmic muons at the level of 2%.
Sterile neutrinos are searched for assuming a 4 neutrino model (3 active and 1 sterile neutrino). The exclusion area in the sterile neutrino parameter plane is obtained using a ratio of positron energy spectra collected at different distances. New analysis that uses information about relative counting rates as well as changes in positron energy spectra shapes is described. We present recent results based on 3.5 million IBD events collected at 3 distances from detector to reactor core. The excluded area covers a wide range of the sterile neutrino parameters up to $\sin^22\theta$ < 0.008 in the most sensitive region. The talk will cover the analysis of systematic uncertainties and the statistical methods used to obtain exclusion areas.

Primary author

Presentation Materials

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