Charge Exchange and Production of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi></mml:math>Mesons and Multiple Neutral Pions in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mi>p</mml:mi></mml:math>Reactions between 654 and 1247 MeV/<i>c</i>

Bulos, F.; Lanou, R.E.; Pifer, A. E.; Shapiro, A.; Bordner, C. A.; Brenner, A. E.; Law, M. E.; Ronat, E.; Rudnick, F.D.; Strauch, K.; Szymański, J.; Bastien, Pierre; Brabson, B.; Eisenberg, Y.; Feld, Bernard T.; Kistiakowsky, V.; Pless, I. A.; Rosenson, L.; Yamamoto, R. K.; Calvelli, G.; Gasparini, F.; Guerriero, L.; Salandin, G. A.; Tomasin, A.; Ventura, L.; Voci, C.; Waldner, F.

doi:10.1103/physrev.187.1827

Cited by 60 publications

(28 citation statements)

References 47 publications

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“…2. Here also the S 11 (1535) is [14], Richards [11], Morrison [70], Deinet [9], Debenham [12], Crouch [71], Brown [7], Feltesse [10], Bulos [8,72], and Clajus [13]. The inserted box shows the near-threshold energy range.…”

Section: Observables For γ P → η Pmentioning

confidence: 97%

“…The situation is very different for the π − p → ηn reaction. Actually, the data come mainly from measurements performed in the 1970s [7][8][9][10][11][12] and suffer from some inconsistencies [13]. A recent experiment, performed at BNL using the Crystal Ball spectrometer [14], offers a high quality data set, though limited to the close-to-threshold kinematics.…”

Section: Introductionmentioning

confidence: 99%

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Combined study ofγp→ηpandπ−p→ηnin a chiral constituent quark approach

Saghai

2009

Phys. Rev. C

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Within a chiral constituent quark model approach, η-meson production on the proton via electromagnetic and hadron probes is studied. With few parameters, the differential cross section and polarized beam asymmetry for γp → ηp and differential cross section for π − p → ηn processes are calculated and successfully compared with the data in the center-of-mass energy range from threshold up to 2 GeV. The five known resonances S 11 (1535), S 11 (1650), P 13 (1720), D 13 (1520), and F 15 (1680) are found to be dominant in the reaction mechanisms in both channels. Possible roles played by new resonances are also investigated; and in the photoproduction channel, significant contribution from S 11 and D 15 resonances, with masses around 1715 and 2090 MeV, respectively, are deduced. For the so-called missing resonances, no evidence is found within the investigated reactions. The helicity amplitudes and decay widths of N * → πN, ηN are also presented and found to be consistent with the Particle Data Group values.

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Section: Observables For γ P → η Pmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Combined study ofγp→ηpandπ−p→ηnin a chiral constituent quark approach

Saghai

2009

Phys. Rev. C

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“…The corresponding theoretical results as well as the experimental data from Refs. [17,18] are shown in Fig. 2, where the dotted and dashed curves stand for the contributions from the nucleon pole and the N * (1535) resonance, respectively, while the solid line stands for the total contributions, which can describe well the experimental data with Λ N = 0.6 GeV and Λ N * = 2.0 GeV.…”

Section: Numerical Results and Discussionmentioning

confidence: 56%

“…Along this line, with the near threshold experimental data [17][18][19][20], we reanalysis the π − p → ηn reaction from the production threshold to the center-of-mass energy W ≃ 1.65 GeV by using the effective Lagrangian approach and the isobar model. We payed especial attention to the role of the N * (1535) resonance, while the contribution of nucleon pole is also considered in the present calculation, and we find that the interference terms between the N * (1535) resonance and the nucleon pole are significant.…”

Section: Introductionmentioning

confidence: 99%

The near threshold π^- p →ηn reaction in an effective Lagrangian approach

et al. 2014

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The near threshold π − p → ηn reaction is studied within an effective Lagrangian approach and the isobar model. By considering the contributions from s-and u-channel nucleon pole and N * (1535) resonance, the total and differential cross sections of the π − p → ηn reaction near threshold are calculated. Our theoretical results can fairly reproduce the current experimental data. It is also shown that while the center-of-mass energy lies in the range from the reaction threshold up to 1.65 GeV, s-channel N * (1535) resonance plays the dominant role. The effect from nucleon pole is found to be small but the interference terms between the N * (1535) resonance and the nucleon pole are significant. The contributions from t-channel processes are negligible in the present calculation.

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“…For the π − p → K 0 Λ reaction, the data of total cross section and differential cross sections can be obtained in the whole resonance range [8][9][10][11][12][13][14][15], furthermore, some data of Λ polarization are also obtained in the energy region W < 1.8 GeV [11]. While for the π − p → ηn reaction, a few precise data on the differential cross sections and total cross section can be obtained near the N(1535)S 11 mass threshold from Crystal Ball spectrometer at BNL [16], however, other old data [17][18][19][20][21][22] might be problematic over the whole energy range for its limited angle coverage and uncontrollable uncertainties [23]. Thus, to get reliable information on the resonance properties, a combined analysis of the π − p → K 0 Λ and ηn reactions is necessary before new precise data are obtained.…”

Section: Introductionmentioning

confidence: 99%

Combined analysis of theπ−p→K0Λ,ηnreactions in a chiral quark model

et al. 2016

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A combined analysis of the reactions π − p → K 0 Λ and ηn is carried out with a chiral quark model. The data in the center-of-mass (c.m.) energy range from threshold up to W ≃ 1.8 GeV are reasonably described. For π − p → K 0 Λ, it is found that N(1535)S 11 and N(1650)S 11 paly crucial roles near threshold. The N(1650)S 11 resonance contributes to the reaction through configuration mixing with N(1535)S 11 . The constructive interference between N(1535)S 11 and N(1650)S 11 is responsible for the peak structure around threshold in the total cross section. The n-pole, u-and t-channel backgrounds provide significant contributions to the reaction as well. While, for the π − p → ηn process, the "first peak" in the total cross section is dominant by N(1535)S 11 , which has a sizeable destructive interference with N(1650)S 11 . Around P π ≃ 1.0 GeV/c (W ≃ 1.7 GeV), there seems to be a small bump structure in the total cross section, which might be explained by the interference between the u-channel and N(1650)S 11 . The N(1520)D 13 resonance notably affects the angle distributions of the cross sections, although less effects are seen in the total cross section. The role of P-wave state N(1720)P 13 should be further confirmed by future experiments. If N(1720)P 13 has a narrow width of Γ ≃ 120 MeV as found in our previous work by a study of the π 0 photoproduction processes, obvious evidence should be seen in the π − p → K 0 Λ and ηn processes as well.

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Charge Exchange and Production ofηMesons and Multiple Neutral Pions inπ−pReactions between 654 and 1247 MeV/c

Cited by 60 publications

References 47 publications

Combined study ofγp→ηpandπ−p→ηnin a chiral constituent quark approach

Combined study ofγp→ηpandπ−p→ηnin a chiral constituent quark approach

The near threshold π^- p →ηn reaction in an effective Lagrangian approach

Combined analysis of theπ−p→K0Λ,ηnreactions in a chiral quark model

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Charge Exchange and Production ofηMesons and Multiple Neutral Pions inπ−pReactions between 654 and 1247 MeV/c

Cited by 60 publications

References 47 publications

Combined study ofγp→ηpandπ−p→ηnin a chiral constituent quark approach

Combined study ofγp→ηpandπ−p→ηnin a chiral constituent quark approach

The near threshold π- p →ηn reaction in an effective Lagrangian approach

Combined analysis of theπ−p→K0Λ,ηnreactions in a chiral quark model

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The near threshold π^- p →ηn reaction in an effective Lagrangian approach