High-energy ππ scattering without and with photon radiation
We discuss the processes ππ→ππ and ππ→ππγ from a general quantum field theory (QFT) point of view. In the soft-photon limit where the photon energy ω→0 we study the theorem due to F.E. Low. We confirm his result for the 1/ω term of the ππ→ππγ amplitude but disagree for the ω0 term. We analyze the or...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
24 January 2022
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| In: |
Physical review
Year: 2022, Jahrgang: 105, Heft: 1, Pages: 1-40 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.105.014022 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.105.014022 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.105.014022 
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| Verfasserangaben: | Piotr Lebiedowicz, Otto Nachtmann, and Antoni Szczurek |
| Zusammenfassung: | We discuss the processes ππ→ππ and ππ→ππγ from a general quantum field theory (QFT) point of view. In the soft-photon limit where the photon energy ω→0 we study the theorem due to F.E. Low. We confirm his result for the 1/ω term of the ππ→ππγ amplitude but disagree for the ω0 term. We analyze the origin of this discrepancy. Then we calculate the amplitudes for the above reactions in the tensor-Pomeron model. We identify places where “anomalous” soft photons could come from. Three soft-photon approximations (SPAs) are introduced. The corresponding SPA results are compared to those obtained from the full tensor-Pomeron model for c.m. energies √s=10 GeV and 100 GeV. The kinematic regions where the SPAs are a good representation of the full amplitude are determined. Finally we make some remarks on the type of fundamental information one could obtain from high-energy exclusive hadronic reactions without and with soft photon radiation. |
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| Beschreibung: | Gesehen am 14.09.2022 |
| Beschreibung: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.105.014022 |