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SUMMARY:Improvement of reconstruction and background suppression for track
  events in baikal-gvd based on zenith angle estimation from individual str
 ings
DTSTART;VALUE=DATE-TIME:20261027T162500Z
DTEND;VALUE=DATE-TIME:20261027T163000Z
DTSTAMP;VALUE=DATE-TIME:20261105T013410Z
UID:indico-contribution-6454@cern.ch
DESCRIPTION:Speakers: Aleksey Kulikov ()\nBaikal-GVD is a gigaton-scale ne
 utrino telescope deployed at a depth of about 1 km in the waters of Lake B
 aikal. The detector registers Cherenkov radiation using vertical strings o
 f optical modules. Each string comprises 36 modules with a 15 m spacing\, 
 providing an instrumented length of 525 m\, and a group of 8–9 such stri
 ngs forms an independent cluster.\n\nSince standard track reconstruction m
 ethods require hits in at least two strings\, a significant fraction of th
 e data remains unused. This work is devoted to the development of an algor
 ithm for reconstructing the muon zenith angle based on information from a 
 single string. The goal is to extend the existing track dataset with nearl
 y vertical events and to employ independent zenith angle estimation for th
 e suppression of atmospheric muon background.\n\nThe performance of the al
 gorithm has been tested on simulated samples of neutrinos and atmospheric 
 muons. It is shown that for upgoing near-vertical (with zenith angle 170°
 -180°) neutrinos\, the median accuracy of zenith angle reconstruction rea
 ches 1° (depending on the zenith angle and the number of hit modules).\n\
 nhttps://indico.particle.mephi.ru/event/626/contributions/6454/
LOCATION:Sevastopol hotel Conference Hall 1
URL:https://indico.particle.mephi.ru/event/626/contributions/6454/
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