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SUMMARY:Noise suppression for Baikal-GVD using spectral properties of even
 t graphs
DTSTART;VALUE=DATE-TIME:20261029T143500Z
DTEND;VALUE=DATE-TIME:20261029T145000Z
DTSTAMP;VALUE=DATE-TIME:20261104T194332Z
UID:indico-contribution-6363@cern.ch
DESCRIPTION:Speakers: Alexander Avrorin (INR RAS)\nBaikal-GVD neutrino tel
 escope is located in the Southern basin of Lake Baikal with the instrument
 ed depth ranging from 730 to 1275 m. The measured noise rates of the detec
 tor channels range from ten to hundreds of kilohertz\, depending on season
  and the depth of the installed photomultiplier. We present an evolution o
 f the method currently employed for muon track event reconstruction in Bai
 kal-GVD. Like in the previous approach\, it represents events as graphs\, 
 with vertices corresponding to photomultiplier hits and edges correspondin
 g to a causality condition imposed by the Cherenkov cone. However\, instea
 d of identifying the vertices of fully connected subgraphs with Cherenkov 
 photons\, we use the graph's spectral properties to identify noise hits an
 d provide an initial estimate of the muon direction. This increases collec
 tion efficiency for delayed photons from cascades along the track which be
 come dominant at higher energies. The proposed approach provides a 20% inc
 rease in Cherenkov hit collection efficiency for an astrophysical neutrino
  sample and a reduction in processing time\, while maintaining a noise rej
 ection rate comparable to that of the previous method.\n\nhttps://indico.p
 article.mephi.ru/event/626/contributions/6363/
LOCATION: Conference Hall 3
URL:https://indico.particle.mephi.ru/event/626/contributions/6363/
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