Neutrino-nucleus cross sections for W-boson and trident production

Oct 17, 2019
22 pages
Published in:
  • Phys.Rev.D 101 (2020) 3, 036011
  • Published: Feb 19, 2020
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Abstract: (APS)
The physics of neutrino-nucleus cross sections is a critical probe of the Standard Model and beyond. A precise understanding is also needed to accurately deduce astrophysical neutrino spectra. At energies above ∼5  GeV, the cross section is dominated by deep inelastic scattering, mediated by weak bosons. In addition, there are subdominant processes where the hadronic coupling is through virtual photons, γ*: (on-shell) W-boson production (e.g., where the underlying interaction is νℓ+γ*→ℓ-+W+) and trident production (e.g., where it is ν+γ*→ν+ℓ1-+ℓ2+). These processes become increasingly relevant at TeV–PeV energies. We undertake the first systematic approach to these processes (and those with hadronic couplings through virtual W and Z bosons), treating them together, avoiding common approximations, considering all neutrino flavors and final states, and covering the energy range 10–108  GeV. In particular, we present the first complete calculation of W-boson production and the first calculation of trident production at TeV–PeV energies. When we use the same assumptions as in prior work, we recover all of their major results. In a companion paper [this issue, Phys. Rev. D 101, 036010 (2020)PRVDAQ2470-001010.1103/PhysRevD.101.036010], we show that these processes should be taken into account for IceCube-Gen2.
Note:
  • Main text 14 pages and 13 figures; minor changes; results and conclusions unchanged; matches published version
  • Phenomenological aspects of field theory, general methods
  • neutrino: spectrum
  • neutrino: flavor
  • photon: virtual
  • neutrino nucleus: scattering
  • deep inelastic scattering
  • vector boson
  • UHE
  • W: production
  • neutrino photon --> lepton- W+