Search for neutrino signals correlated with LHAASO diffuse Galactic emission
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916583256883200 |
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| author | Li, Wenlian Huang, Tian-Qi Xu, Donglian He, Huihai |
| author_facet | Li, Wenlian Huang, Tian-Qi Xu, Donglian He, Huihai |
| contents | The diffuse Galactic $γ$-ray emission originates from the interactions between cosmic rays and the interstellar medium or radiation fields within our Galaxy, where the production of neutrinos is also anticipated. Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported measurements of diffuse $γ$-rays from the Galactic plane with energies ranging from sub-TeV to 1 PeV. Using publicly available 7 years of IceCube track data with the full detector, we conduct a template search using the $γ$-ray flux map observed by LHAASO-KM2A as the neutrino emission template and perform a scan search of the Galactic plane. In the template search, a mild excess of neutrinos is observed in the Galactic plane with a pretrial (posttrial) significance of $1.9σ$ ($1.1σ$). The measured muon neutrino intensity at 25 TeV is $4.73^{+2.53}_{-2.51}\times10^{-14}\,{\rm TeV^{-1}\,cm^{-2}\,s^{-1}\,sr^{-1}}$, consistent with the expected neutrino flux assuming that all the diffuse Galactic $γ$-rays originate from hadronic interactions. In the Galactic plane scan search, the most significant location is found at $l=63.57^{\circ}$ and $b=0.93^{\circ}$ with a pretrial (posttrial) significance of $4.6σ$ ($1.8σ$). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12123 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Search for neutrino signals correlated with LHAASO diffuse Galactic emission Li, Wenlian Huang, Tian-Qi Xu, Donglian He, Huihai High Energy Astrophysical Phenomena The diffuse Galactic $γ$-ray emission originates from the interactions between cosmic rays and the interstellar medium or radiation fields within our Galaxy, where the production of neutrinos is also anticipated. Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported measurements of diffuse $γ$-rays from the Galactic plane with energies ranging from sub-TeV to 1 PeV. Using publicly available 7 years of IceCube track data with the full detector, we conduct a template search using the $γ$-ray flux map observed by LHAASO-KM2A as the neutrino emission template and perform a scan search of the Galactic plane. In the template search, a mild excess of neutrinos is observed in the Galactic plane with a pretrial (posttrial) significance of $1.9σ$ ($1.1σ$). The measured muon neutrino intensity at 25 TeV is $4.73^{+2.53}_{-2.51}\times10^{-14}\,{\rm TeV^{-1}\,cm^{-2}\,s^{-1}\,sr^{-1}}$, consistent with the expected neutrino flux assuming that all the diffuse Galactic $γ$-rays originate from hadronic interactions. In the Galactic plane scan search, the most significant location is found at $l=63.57^{\circ}$ and $b=0.93^{\circ}$ with a pretrial (posttrial) significance of $4.6σ$ ($1.8σ$). |
| title | Search for neutrino signals correlated with LHAASO diffuse Galactic emission |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2408.12123 |