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Title: Neutrino signals in IceCube from weak production of top and charm quarks

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1355612
Grant/Contract Number:
AC02-06CH11357; FG02-12ER41811
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 9; Related Information: CHORUS Timestamp: 2017-05-04 22:09:14; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Barger, Vernon, Basso, Edward, Gao, Yu, and Keung, Wai-Yee. Neutrino signals in IceCube from weak production of top and charm quarks. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.093002.
Barger, Vernon, Basso, Edward, Gao, Yu, & Keung, Wai-Yee. Neutrino signals in IceCube from weak production of top and charm quarks. United States. doi:10.1103/PhysRevD.95.093002.
Barger, Vernon, Basso, Edward, Gao, Yu, and Keung, Wai-Yee. 2017. "Neutrino signals in IceCube from weak production of top and charm quarks". United States. doi:10.1103/PhysRevD.95.093002.
@article{osti_1355612,
title = {Neutrino signals in IceCube from weak production of top and charm quarks},
author = {Barger, Vernon and Basso, Edward and Gao, Yu and Keung, Wai-Yee},
abstractNote = {},
doi = {10.1103/PhysRevD.95.093002},
journal = {Physical Review D},
number = 9,
volume = 95,
place = {United States},
year = 2017,
month = 5
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 4, 2018
Publisher's Accepted Manuscript

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  • We propose a method to extract the charm structure function of the nucleon {ital c}({ital x},{ital Q}{sup 2}=m{sub W}{sup 2}) from measurements of the rapidity distribution of {ital W}{sup {plus minus}} and {ital Z} in {ital p{bar p}} collisions. The production of weak intermediate bosons via charm occurs at the few percent level at the Fermilab Tevatron and has in particular a strong influence on the important measurement of the ratio of {ital W} and {ital Z} events as {ital c{bar s}}{r arrow}{ital W} is expected to be much larger than {ital c{bar c}}{r arrow}{ital Z}.
  • We investigate whether the recent ultra-high energy neutrino events detected at the IceCube neutrino observatory could come from the decay of charmed mesons produced within the mildly relativistic jets of supernova-like astrophysical sources. We demonstrate that the allowed region in the astrophysical and QCD parameter spaces permit an explanation of the 5.7σ excess of neutrinos observed by IceCube in the energy range 30 TeV–2 PeV as a diffuse flux of neutrinos produced in such slow-jet supernovae. We discuss the theoretical uncertainties inherent in the evaluation of charm production in high energy hadronic collisions, as well as some of the astrophysicalmore » uncertainties associated with slow-jet supernova sources. These sources result in a diffuse neutrino spectrum that exhibits a sharp drop at energies above a few PeV. We incorporate the effect of energy dependence in the spectrum-weighted charm production and decay cross sections and show that this has a very significant effect on the shape, magnitude and cutoff energies for the diffuse neutrino flux.« less
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  • We explore the possibility of distinguishing neutrino mass hierarchies through the neutrino signal from dark matter annihilation at neutrino telescopes. We consider a simple extension of the standard model where the neutrino masses and mixing angles are obtained via the type-II seesaw mechanism as an explicit example. We show that future extensions of IceCube neutrino telescope may detect the neutrino signal from DM annihilation at the Galactic Center and inside the Sun, and differentiate between the normal and inverted mass hierarchies, in this model.
  • We explore the possibility of distinguishing neutrino mass hierarchies through the neutrino signal from dark matter annihilation at neutrino telescopes. We consider a simple extension of the standard model where the neutrino masses and mixing angles are obtained via the type-II seesaw mechanism as an explicit example. We show that future extensions of IceCube neutrino telescope may detect the neutrino signal from DM annihilation at the Galactic Center and inside the Sun, and differentiate between the normal and inverted mass hierarchies, in this model.