Pauli blocking in the nuclear medium<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>π</mml:mi><mml:mi>N</mml:mi></mml:math>transition matrix

Moniz, Ernest J.; Sevgen, Alpar

doi:10.1103/physrevc.24.224

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…This factor of half represents a very crude estimate of the ∆ + N → N + N to ∆ → Nπ and ∆ + N → N + N branching ratio. Theoretical results [12,13] are consistent with this factor. However, there could be both important Q 2 and model dependence in this branching ratio.…”

Section: Of ∆-H Excitations Leads To 2p-2h (C) P-h Plus All ∆-H Excitsupporting

confidence: 75%

Delta excitations in neutrino-nucleus scattering

1996

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Section: Of ∆-H Excitations Leads To 2p-2h (C) P-h Plus All ∆-H Excitsupporting

confidence: 75%

Delta excitations in neutrino-nucleus scattering

1996

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“…m R and Γ R are the pole mass and the width of a resonance R, m is the current resonance mass, q and q R are the three-momenta of the pion in the reference frame of a resonance with mass m and m R , l is the angular momentum of the emitted pion (l = 1 for the Δ). The quantity δ is a parameter in the cut-off function which, in the case of Δ resonance, equals to δ = 0.3 GeV/c [35]. Such a parameterization which suppresses the high-mass tail of the resonance, is compatible with the description of the HADES data at a higher energy [29].…”

Section: Results and Comparison To Resonance Modelmentioning

confidence: 98%

Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV

Agakishiev¹,

Bałanda²,

Belver³

et al. 2015

Eur. Phys. J. A

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Baryon resonance production in proton-proton collisions at a kinetic beam energy of 1.25 GeV is investigated. The multi-differential data were measured by the HADES Collaboration. Exclusive channels with one pion in the final state (npπ + and ppπ 0) were put to extended studies based on various observables in the framework of a one-pion exchange model and with solutions obtained within the framework of a partial wave analysis (PWA) of the Bonn-Gatchina group. The results of the PWA confirm the dominant contribution of the Δ(1232), yet with a sizable impact of the N (1440) and non-resonant partial waves.

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“…The coincidence experiments of (p, n) reactions at the ∆ resonance [16] showed that a large portion of deltas in the medium decay without emitting pions. Furthermore, in theoretical calculations, a value of about 70 MeV has been used as the 2p-2h partial width [18,17]. Thus, experimental and theoretical results indicate a substantial amount of pionless delta decay in the medium.…”

Section: Resultsmentioning

confidence: 99%

“…Note, we have not included pion distortions in Eq. (18). These may somewhat reduce the cross section.…”

Section: Coherent Pion Productionmentioning

confidence: 99%

Detection of atmospheric neutrinos and relativistic nuclear structure effects

Kim¹,

Schramm²,

Horowitz³

1996

Phys. Rev. C

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Neutrino-nucleus cross sections for the detection of atmospheric neutrinos are calculated in relativistic impulse and random phase approximations. Pion production is estimated via inclusive ∆-hole nuclear excitations. The number of pion events can confuse the identification of the neutrino flavor. As a further source of pions we calculate coherent pion production (where the nucleus remains in the ground state). We examine how these nuclear structure effects influence atmospheric neutrino experiments and study possible improvements in the present detector simulations. *

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Pauli blocking in the nuclear mediumπNtransition matrix

Cited by 17 publications

References 5 publications

Delta excitations in neutrino-nucleus scattering

Delta excitations in neutrino-nucleus scattering

Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV

Detection of atmospheric neutrinos and relativistic nuclear structure effects

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