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SUMMARY:Parameter degeneracy and information loss in inverse flavor mappin
 g for high-energy astrophysical neutrinos
DTSTART;VALUE=DATE-TIME:20261025T081000Z
DTEND;VALUE=DATE-TIME:20261025T083000Z
DTSTAMP;VALUE=DATE-TIME:20261025T015922Z
UID:indico-contribution-2991@indico.itp.ac.cn
DESCRIPTION:Speakers: Zi-Qiang Chen (HIAS-UCAS)\nGiven a high-energy astro
 physical neutrino flux\, its source flavor ratios $\\eta = \\{\\eta^{}_e\,
  \\eta^{}_\\mu\, \\eta^{}_\\tau\\}$ are correlated with the ones $f = \\{f
 ^{}_e\, f^{}_\\mu\, f^{}_\\tau\\}$ measured at a neutrino telescope via $f
  = P \\eta$\, where the elements of $P$ consist of four lepton flavor mixi
 ng parameters. But realistic inverse flavor mapping $\\eta = P^{-1} f$ enc
 ounters unavoidable parameter degeneracy and information loss\, especially
  in or near the $\\det P = 0$ limit allowed by current neutrino oscillatio
 n data. In this work we explore the parameter correlation condition for $\
 \det P = 0$ including the $\\mu$-$\\tau$ reflection symmetry case\, formul
 ate the corresponding constraints on $f^{}_e$ and $f^{}_\\mu$ versus $\\et
 a^{}_e$ and $\\eta^{}_\\mu$\, and illustrate to what extent the source fla
 vor distribution can be mapped by using the recent IceCube all-sky neutrin
 o flux data ranging from 5 TeV to 10 PeV under the assumption that the rel
 evant sources have a common flavor composition.\n\nhttps://indico.itp.ac.c
 n/event/427/contributions/2991/
LOCATION:
URL:https://indico.itp.ac.cn/event/427/contributions/2991/
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