Excitation of the? (1232)-resonance in proton-nucleus collisions

Trzaska, M.; Pelte, D.; Lemaire, M. C.; Alard, J. P.; Augerat, J.; Bachelier, D.; Bastid, N.; Boyard, J. L.; Cavata, C.; Charmensat, P.; Dupieux, P.; Gorodetzky, P.; Gösset, J.; Hennino, T.; Jourdain, J.C.; LeMerdy, A.; L’Hôte, D.; Lucas, B.; Marroncle, J.; Montarou, G.; Parizet, M.J.; Poitou, J.; Quassoud, D.; Radvanyi, P.; Ramstein, B.; Rahmani, A.; Roy‐Stéphan, M.; Valette, O.; Vandermeulen, J.; Żuprański, P.

doi:10.1007/bf01294681

Cited by 27 publications

(24 citation statements)

References 39 publications

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“…The resonance mass was found to be shifted by about −25 MeV/ 2 towards lower masses in reactions on various targets, compared to those on protons [26][27][28]. The mass reduction of ∆(1232) in +A collisions (A =C, Nb, Pb) at 0 8 and 1 6 GeV incident energy [26] was related to the effects of Fermi motion, NN scattering, and pion reabsorption in nuclear matter.…”

Section: Introductionmentioning

confidence: 99%

“…p [26,27] or 3 He [28] induced reactions at around 2 GeV bombarding energy, the pπ correlations were successfully analyzed and the mass distribution of ∆(1232) was extracted. The resonance mass was found to be shifted by about −25 MeV/ 2 towards lower masses in reactions on various targets, compared to those on protons [26][27][28]. The mass reduction of ∆(1232) in +A collisions (A =C, Nb, Pb) at 0 8 and 1 6 GeV incident energy [26] was related to the effects of Fermi motion, NN scattering, and pion reabsorption in nuclear matter.…”

Section: Introductionmentioning

confidence: 99%

“…In peripheral reactions with very light projectiles, e.g. p [26,27] or 3 He [28] induced reactions at around 2 GeV bombarding energy, the pπ correlations were successfully analyzed and the mass distribution of ∆(1232) was extracted. The resonance mass was found to be shifted by about −25 MeV/ 2 towards lower masses in reactions on various targets, compared to those on protons [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Δ0(1232) production in collisions of protons with carbon nuclei at 4.2 GeV/c

Olimov¹,

Haseeb

Olimov

et al. 2011

Open Physics

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Abstract:The production of ∆ 0 (1232)-resonances in p+ 12 C collisions at 4.2 GeV/c was analyzed with 4π acceptance. The mass distribution of ∆ 0 (1232) was reconstructed using an angular criterion. The fraction of charged π − -mesons coming from ∆ 0 (1232) decay was estimated and compared to those obtained in earlier works. The momentum, transverse momentum, kinetic energy, and rapidity distributions as well as invariant cross sections of ∆ 0 (1232)-resonances were reconstructed in the laboratory frame. The mean kinematical characteristics of the reconstructed ∆ 0 (1232) were compared to those of participant protons in experiment and within some of the models. The freeze-out temperature of ∆ 0 (1232) estimated in the present analysis was compared with those obtained using different methods for ∆(1232) produced with other sets of colliding nuclei at various incident energies. The relative number of nucleons excited to ∆ 0 (1232) at freeze-out conditions in p+ 12 C collisions was estimated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Δ0(1232) production in collisions of protons with carbon nuclei at 4.2 GeV/c

Olimov¹,

Haseeb

Olimov

et al. 2011

Open Physics

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“…It is thus expected, and this is underlined in Ref. [42], that neglecting resonance formation by assuming direct pion production can affect only the calculations of this kind of quantities in light nuclei. This conclusion is presumably even more valid for broader resonances.…”

Section: Discussionmentioning

confidence: 99%

“…A careful analysis of such correlations for the resonance in proton-nucleus reactions, made in Ref. [42], showed that the signal is barely visible, in light nuclei only, in the energy range under consideration. It is thus expected, and this is underlined in Ref.…”

Section: Discussionmentioning

confidence: 99%

Extension of the Liège intranuclear cascade model at incident energies between 2 and 12 GeV. Aspects of pion production

Pedoux

2011

Nuclear Physics A

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The validity of the standard version of the Liège Intra-Nuclear Cascade (INCL4) model, which has been shown to be quite successful for the description of spallation reactions, is limited to an upper incident energy of ∼2 GeV, because inelastic elementary processes are restricted to the excitation and de-excitation of the Delta resonance. In this paper, the INCL4 model is extended to higher incident energy by including other inelastic elementary collisions. However, excitation of heavier baryonic resonances is replaced by direct multipion production in elementary nucleon-nucleon and pion-nucleon collisions. The predictions of the modified model for production of charged pions by proton and pion beams off nuclei are compared with experimental data of the HARP Collaboration for beam energies between 2 and 12 GeV. The apparent duality between the approach based on excitation of numerous baryonic resonances and our approach is briefly discussed.

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In-Medium Modification of the Δ(1232) Resonance at Sis Energies

Pelte

1999

Advances in Nuclear Dynamics 5

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From the pion production rates n π /A part and the pion charge ratios R π = n π − /n π + and S π = n π 0 /(n π − + n π + ), measured in p + a and A + A reactions, it is concluded that the mass of the ∆(1232) resonance is reduced in dense nuclear matter. This conclusion is supported by the ∆(1232) mass distribution extracted from correlated (p,π ± ) pairs and the π ± transverse momentum distributions.

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Excitation of the? (1232)-resonance in proton-nucleus collisions

Cited by 27 publications

References 39 publications

Analysis of Δ0(1232) production in collisions of protons with carbon nuclei at 4.2 GeV/c

Analysis of Δ0(1232) production in collisions of protons with carbon nuclei at 4.2 GeV/c

Extension of the Liège intranuclear cascade model at incident energies between 2 and 12 GeV. Aspects of pion production

In-Medium Modification of the Δ(1232) Resonance at Sis Energies

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