Single-Isobar Production in Proton-Proton Interactions at 28.5 GeV/<i>c</i>

Ellis, W.E.; Miller, D. J.; Morris, Thomas W.; Panvini, R. S.; Thorndike, A. M.

doi:10.1103/physrevlett.21.697

Cited by 30 publications

(4 citation statements)

References 9 publications

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“…Due to this also, the form of the spectra are not agree with experimental ones at M nπ + ≤ 2 GeV. [26,27,28,29,30,31]. Lines are model calculations.…”

Section: Verification Of Diffraction Dissociation Simulationsmentioning

confidence: 99%

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Toward Description of $pp$ and $p{\rm C}$ Interactions at High Energies: Problems of Fritiof-based Models

Uzhinsky

2014

Preprint

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How do the models (Fritiof 1.6, Fritiof 7.0, UrQMD 3.3 and Hijing 1.383) describe experimental data of NA61/SHINE and NA49 Collaborations on pp and pC interactions at high energies? An answer on this question is given in the paper. It is shown that the UrQMD model does not reproduce the energy dependence of π − meson production in pp-interactions; the Fritiof 1.6 and the Fritiof 7.0 models underestimate the meson production on ∼ 10 %; the Hijing model overestimates the data on ∼ 10 %. A change of a LUND fragmentation function parameter in the Fritiof models 1.6/7.0 allows to describe the data. A decreasing of probabilities of binary processes in the UrQMD model like p + p → N + N and so on, allows one to describe the data, thus a problem of a correct accounting of the processes arises. An increasing of a probability of the single diffraction dissociation in the Hijing model from 35 % to 50 % allows to describe the data, though a spectrum of masses produced in the diffraction is not satisfactory. A description of the diffraction is a problem in all the models.

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“…Due to this also, the form of the spectra are not agree with experimental ones at M nπ + ≤ 2 GeV. [26,27,28,29,30,31]. Lines are model calculations.…”

Section: Verification Of Diffraction Dissociation Simulationsmentioning

confidence: 99%

“…Figure 9: Mass distributions of nπ + pairs in the reactions pp → p + n + π + . Points are experimental data presented in[26,27,28,29,30,31]. Lines are model calculations.…”

mentioning

confidence: 99%

Toward Description of $pp$ and $p{\rm C}$ Interactions at High Energies: Problems of Fritiof-based Models

Uzhinsky

2014

Preprint

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“…Thus we have not been able to measure its spin and parity. However, if a J p = l + assignment is assumed for this enhancement, we can estimate the cross sections for the processes (4) pp-pN* + (U10) *tt7T (5) (5) and (6), respectively. and pp-pN* + (U10) I P7f° (6) The loss of events due to the mass cut has been estimated using the Monte Carlo method and an isotropic decay angular distribution.…”

Section: Pp-p(mr + )mentioning

confidence: 99%

“…Thus, it has not been possible to study the properties of the enhancement in these experiments. Ellis et al 4 reported a bubble-chamber study of proton-proton collisions at 28.5 GeV/c using a missing-mass technique in an attempt to identify the source of the enhancement near 1.4 GeV/c 2 as observed in Ref. 3.…”

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confidence: 99%

Evidence for a NarrowN*(1470)

Zhang¹,

Colton²

1971

Phys. Rev. Lett.

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A narrow J =i enhancement at a mass of 1.462 ±0.006 GeV/c 2 with a width of 0.049 ±0.012 GeV/e 2 has been observed in^7r° and«7r + modes produced inpp collisions at 6.Q GeV/c. The effect, having a 6-standard-deviation significance, is narrower in width than has been observed before in missing-mass-spectrometer experiments.Since its discovery in phase-shift analyses, 1 the N*(1470) state has been one of the most controversial, if not the most uncertain, resonances reported. 2 Early experiments reporting obser-vations of its existence have been done using a one-armed proton spectrometer with counters and spark chambers, 3 Among these various experiments, general agreement was reached on

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1.2.4 References for 1.2

Diddens¹

Elastic and Charge Exchange Scattering of Elementary Particles

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Single-Isobar Production in Proton-Proton Interactions at 28.5 GeV/c

Cited by 30 publications

References 9 publications

Toward Description of $pp$ and $p{\rm C}$ Interactions at High Energies: Problems of Fritiof-based Models

Toward Description of $pp$ and $p{\rm C}$ Interactions at High Energies: Problems of Fritiof-based Models

Evidence for a NarrowN*(1470)

1.2.4 References for 1.2

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