Pion production in nuclear collisions with Fermi motion effects

Sandel, M. S.; Vary, James P.; Garpman, S.

doi:10.1103/physrevc.20.744

Cited by 23 publications

(4 citation statements)

References 19 publications

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“…The error due to the assumption that all final state particles were pions was checked by assigning the proton mass to one of the final state hadron jet particles such that it be in the momentum range 1 < p < 4 GeV and in the polar angular range 0.2 < θ < 0.6 radians, and repeating the analysis. The effects of Fermi motion of the nucleons was simulated by randomly assigning a three momentum to the nucleus selected from an isotropic distribution with a maximum momentum of 0.215 GeV [20]. The possible reinteraction of hadronic jet particles within the target nucleus were investigated using the NUCRIN package [21].…”

Section: Systematic Errorsmentioning

confidence: 99%

Precision measurement of scaled momentum, charge multiplicity, and thrust in νμN and interactions

et al. 1999

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We report the first precision measurements of the scaled momentum, the charge multiplicity, and the thrust of hadronic jets in the Breit frame in Deep Inelastic Scattering ν µ N andν µ N charged current events over the Q 2 range from 1 to 100 GeV 2 . The neutrino data, obtained in the NOMAD experiment at the CERN SPS, extend the Q 2 -evolution of these parameters by two orders of magnitude, and with commensurate precision, when compared to those reported by the ep and e + e − experiments.

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Section: Systematic Errorsmentioning

confidence: 99%

Precision measurement of scaled momentum, charge multiplicity, and thrust in νμN and interactions

et al. 1999

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“…[44] and references therein). The Fermi motion of nucleons in nuclei can also greatly enhance the pion production cross sections in the vicinity of the threshold energy [45,46]. Despite efforts to measure subthreshold pion production in the past (See, Ref.…”

Section: A Equations Of State Of Neutron-star Mattermentioning

confidence: 99%

Deep crustal heating by neutrinos from the surface of accreting neutron stars

et al. 2018

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We present a new mechanism for deep crustal heating in accreting neutron stars. Charged pions (π + ) are produced in nuclear collisions on the neutron star surface during active accretion and upon decay they provide a flux of neutrinos into the neutron star crust. For massive and/or compact neutron stars, neutrinos deposit ≈ 1-2 MeV of heat per accreted nucleon into the inner crust. The strength of neutrino heating is comparable to the previously known sources of deep crustal heating, such as from pycnonuclear fusion reactions, and is relevant for studies of cooling neutron stars. We model the thermal evolution of a transient neutron star in a low-mass X-ray binary, and in the particular case of the neutron star MXB 1659-29 we show that additional deep crustal heating requires a higher thermal conductivity for the neutron star inner crust. A better knowledge of pion production cross sections near threshold would improve the accuracy of our predictions.

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“…if the struck target neutron is assumed to be off-shell (E t = m N ). It is worth noting that if the kaons escape in the beam direction then the expression (28) for the Fermi-averaged invariant differential cross section of the π + n → K + Λ process is reduced in view of equations (30), (31) and (33) to an integral only over neutron momentum p t . Therefore, the differential cross section (2) for K + production in π + A-reactions in this case is more directly related to the momentum distribution of the neutrons in the ground state than at other outgoing angles.…”

Section: Direct K + Production Processmentioning

confidence: 99%

“…Six Gaussian fit to the momentum distribution obtained from density-dependent Hartree-Fock calculations with the Skyrme Hamiltonian [33]:…”

Section: The Model and Inputsmentioning

confidence: 99%

Subthreshold K + Production on Nuclei by π + Mesons

Efremov

Paryev

1995

Mesons and Light Nuclei ’95

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The inclusive K + mesons production in π + -nucleus reactions in the subthreshold energy regime is analyzed with respect to the one-step (π + n → K + Λ) and the twostep (π + n → ηp 1 , ηp 2 → K + Λ) incoherent production processes on the basis of an appropriate folding model, which allows one to take into account the various forms of an internal nucleon momentum distribution as well as on-and off-shell propagation of the struck target nucleon. Contrary to proton-nucleus reactions primary reaction channel is found to be significant practically at all considered energies. Detailed predictions for the K + total and invariant differential cross sections from π + C 12 -and π + Pb 208collisions at subthreshold energies are provided.

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Pion production in nuclear collisions with Fermi motion effects

Cited by 23 publications

References 19 publications

Precision measurement of scaled momentum, charge multiplicity, and thrust in νμN and interactions

Precision measurement of scaled momentum, charge multiplicity, and thrust in νμN and interactions

Deep crustal heating by neutrinos from the surface of accreting neutron stars

Subthreshold K + Production on Nuclei by π + Mesons

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