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Photoproduction of $a_{2}(1320)$ in a Regge model
High Energy Physics - Phenomenology · Submitted 4 Oct 2015
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The theoretical result indicates that the shapes of {the} total and differential cross sections of the $\gamma p\rightarrow a_{2}^{+}n$ reaction within the Feynman (isobar) model are much different from that of the Reggeized treatment.
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The abstract, sentence by sentence
In this work, the photoproduction of $a_{2}(1320)$ off a proton target is investigated within an effective Lagrangian approach and the Regge model. The theoretical result indicates that the shapes of {the} total and differential cross sections of the $\gamma p\rightarrow a_{2}^{+}n$ reaction within the Feynman (isobar) model are much different from that of the Reggeized treatment. The obtained cross section is compared with the existing experimental results at low energies. The $a_{2}(1320)$ production cross section at high energies can be tested by the COMPASS experiment, which can provide important information for clarifying the role of the Reggeized treatment at that energy range.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | In this work, the photoproduction of $a_{2}(1320)$ off a proton target is investigated within an effective Lagrangian approach and the Regge model. | contribution 0.94 | 0.90 | 0.05 | asserted 0.92 |
| s1 | The theoretical result indicates that the shapes of {the} total and differential cross sections of the $\gamma p\rightarrow a_{2}^{+}n$ reaction within the Feynman (isobar) model are much different from that of the Reggeized treatment. | result 1.00 | 0.82 | 0.45 | hedged possibility 0.84 |
| s2 | The obtained cross section is compared with the existing experimental results at low energies. | result 0.37 | 0.79 | 0.06 | asserted 0.99 |
| s3 | The $a_{2}(1320)$ production cross section at high energies can be tested by the COMPASS experiment, which can provide important information for clarifying the role of the Reggeized treatment at that energy range. | future work 0.93 | 0.11 | 0.19 | hedged possibility 0.80 |
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The paper
Original abstract
In this work, the photoproduction of $a_{2}(1320)$ off a proton target is investigated within an effective Lagrangian approach and the Regge model. The theoretical result indicates that the shapes of {the} total and differential cross sections of the $\gamma p\rightarrow a_{2}^{+}n$ reaction within the Feynman (isobar) model are much different from that of the Reggeized treatment. The obtained cross section is compared with the existing experimental results at low energies. The $a_{2}(1320)$ production cross section at high energies can be tested by the COMPASS experiment, which can provide important information for clarifying the role of the Reggeized treatment at that energy range.
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How the literature uses it
3 arXiv papers cite this in 5 sentences
Papers citing it · 4 sentences without a confident label
Cites it as background 1 paper
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We do not consider charge exchange processes, as $γp →a_2(1320)^+ n$ or $γp →K_2^*(1430)^+ Λ$ or $→K_2^*(1430)^+,0 Σ^0,+$, which are driven by pion or kaon exchange, respectively, and exhibit a different phenomenology (for example, the former has been studied in [ref] ).
Exclusive tensor meson photoproduction · Vector exchanges · 0.81
What it cites
Uses the method or tool of 1 paper
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For the vertices of $πNN$ and $a_2πγ$, three types of the form factors are considered [ref] : (i) the monopole form factor [equation] (ii) the dipole form factor [equation] (iii) the exponential form factor [equation] where $Λ_t,Λ_d$ and $R$ are the free parameters, which can be determined from the data in this work. $X_L$ is momentum fraction of the proton carried by the neutron.
Diffractive $\rho$ production at small $x$ in future Electron - Ion Colliders · Formalism · 0.96
Uses data or values from 1 paper
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Since the full decay width of the $a_2(1320)$ is small enough in comparison to its mass, the invariant mass distribution for the Dalitz process $γp→ρπn$ can be defined with the two-body process [ref] [equation] where the full width $Γ_a_2=107$ MeV and the partial width $Γ_a_2→ρπ=75$ MeV are taken [ref] .
Photoproduction of $\Lambda(1405)$ with the two-pole structure · Dalitz process $γp→ρπn$ · 0.92
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