Investigation of pion-induced 
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 production off a nucleon target within an interpolating Reggeized approach

Wang, Xiaoyun; He, Jun

doi:10.1103/physrevd.96.034017

Cited by 13 publications

(15 citation statements)

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“…The Reggeized treatment is often adopted to analyze hadron production at high energies [37,57,[59][60][61][62][63][64]. It can be introduced by replacing the t-channel Feynman propagator by the Regge propagator as,…”

Section: Reggeized T-channelmentioning

confidence: 99%

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Pion-induced production of hidden-charm pentaquarks P(4312),P(4440), and P(4457)

Wang

Chen

et al. 2019

Physics Letters B

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The production of the hidden-charm pentaquarks P c via pion-induced reaction on a proton target is investigated within an effective Lagrangian approach. Three experimentally observed states, P c (4312), P c (4440), and P c (4457), are considered in the calculation, and the Reggeized t-channel meson exchange is considered as main background for the reaction π − p → J/ψn. The numerical results show that the experimental data of the total cross section of the reaction π − p → J/ψn at W ≃ 5 GeV can be well explained by contribution of the Reggeized t channel with reasonable cutoff. If the branching ratios Br[P c → J/ψN] ≃ 3% and Br[P c → πN] ≃ 0.05% are taken, the average value of the cross section from the P c (4312) contribution is about 1.2 nb/100 MeV, which is consistent with existing rude data at near-threshold energies. The results indicate that the branching ratios of the P c states to the J/ψN and πN should be small. The shape of differential cross sections shows that the Reggeized t-channel provides a sharp increase at extreme forward angles, while the differential cross sections from the P c states contributions are relatively flat. High-precision experimental measurements on the reaction π − p → J/ψn at near-threshold energies are suggested to confirm the LHCb hidden-charm pentaquarks as genuine states, and such experiments are also helpful to understand the origin of these resonance structures.

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Section: Reggeized T-channelmentioning

confidence: 99%

“…For the s-channel P c -state exchange, a general form factor is adopted to describe the size of hadrons, i.e. [43,57],…”

Section: B Amplitudesmentioning

confidence: 99%

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Pion-induced production of hidden-charm pentaquarks P(4312),P(4440), and P(4457)

Wang

Chen

et al. 2019

Physics Letters B

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“…Usually, the contribution from the s channel with a nucleon pole is expected to be very small, and it will be neglected in the current calcu-lation. The u-channel contribution is usually small and negligible at low energies [19]. Considering that the experimental data points at high energies were obtained by the continuation of the t-channel contribution at very forward angles to all angles, it is reasonable to calculate the cross section with only the t-channel contribution.…”

Section: Formalismmentioning

confidence: 99%

“…Thus, one gets Γ f 1 →a 0 π ≃ 2.2 MeV, which leads to a value of coupling constant g f 1 a 0 π ≃ 2.72. In order to reduce the number of the free parameter, we take the best fitting value g a 0 NN = 28.44 in the pion induced f 1 (1285) production [19]. For kaon induced production, the relevant Lagrangians for the t channel read [24][25][26],…”

Section: A Lagrangiansmentioning

confidence: 99%

Productions of f1(1420) in pion and kaon induced reactions

Wang

et al. 2019

Phys. Rev. D

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The f 1 (1420) productions via pion and kaon induced reactions on a proton target are investigated in an effective Lagrangian approach. Two treatments of the t-channel Born term, the Feynman model and the Regge model, are introduced to calculate the total and differential cross sections of the π − p → f 1 (1420)n and K − p → f 1 (1420)Λ reactions. The numerical results indicate that the experimental data of the total cross section of the π − p → f 1 (1420)n reaction can be reproduced in both the Feynman and the Regge models. Based on the parameters determined in the pion induced reaction, the cross sections of the K − p → f 1 (1420)Λ reaction, about which there is little data found in the literature, are predicted in the same beam momentum range. It is found that the line shapes of the total cross section obtained in a kaon induced reaction with two treatments are quite different. The cross sections for both reactions are at an order of magnitude of µb, or larger, at a beam momenta up to 10 GeV/c. The differential cross sections for both pion and kaon induced reactions are also present. It is found that in the Regge model, the t channel provides a sharp increase at extreme forward angles. The results suggest that the experimental study of the f 1 (1420) in the kaon induced reaction on a proton target is as promising as in the pion induced reaction. Such an experimental measurement is also very helpful to clarify the production mechanism of the f 1 (1420).

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Pion-induced ${K}^{* }$ production with ${{\rm{\Sigma }}}^{* }$ baryon off proton target

Xiang¹,

Wang²,

Xu³

et al. 2020

Commun. Theor. Phys.

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In this work, the reaction is investigated with an effective Lagrangian approach. The contributions from the Born terms, including the s, t, and u channel, are considered, and the Regge model and the Feynman model are applied to treat the t-channel contribution. The existing experimental data can be reproduced with the best-fitted χ 2 being 2.38 and 1.54 for the Feynman and Regge models, respectively. Moreover, it is found that the contribution from the t channel is dominant in the cross-section. The contribution of the u channel is mainly distributed at backward angles, and the contribution from the s channel is small and negligible. In the Feynman model, the contribution of the t-channel K exchange is much larger than the contribution of the exchange, while in the Regge model the contribution of the t-channel K exchange is comparable to that of the exchange. Prediction about the differential cross-section of the reaction is also presented, which is helpful for clarifying the role of the Regge treatment. The current results suggest high-precision experimental measurements which can be performed at J-PARC and COMPASS.

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Investigation of pion-induced f1(1285) production off a nucleon target within an interpolating Reggeized approach

Cited by 13 publications

References 50 publications

Pion-induced production of hidden-charm pentaquarks P(4312),P(4440), and P(4457)

Pion-induced production of hidden-charm pentaquarks P(4312),P(4440), and P(4457)

Productions of f1(1420) in pion and kaon induced reactions

Pion-induced ${K}^{* }$ production with ${{\rm{\Sigma }}}^{* }$ baryon off proton target

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