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PreprintarXiv licencearXiv

Search for π1(1600) in a three-pion system at GlueX

  • Ilia Belov
  • Farah Afzal
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Abstract

The GlueX experiment in Hall D at Jefferson Lab enables studies of the light meson spectrum in γp interactions with a linearly polarized photon beam. GlueX aims in particular to search for hybrid mesons that have exotic quantum numbers and therefore cannot be classified as conventional hadrons. We present the search for the π1(1600) meson by means of a partial-wave analysis of the π+π−π− system produced off the Δ++-baryon. Data with the selected three-pion final state are fitted in bins of m3π as coherent sums of partial-wave amplitudes defined in the reflectivity basis. The properties of a2−(1320) production are investigated through the extracted signal in the ρ π− D-waves. In this analysis, the overall m3π lineshape will be extracted for each of the model contributions. The main interest lies in establishing the existence of a resonant 1−+ contribution in the ρ π− P-wave configuration.

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Cite

BibTeXRIS
BibTeX
@misc{belov2026search,
  title = {{Search for $\boldsymbolπ_1(1600)$ in a three-pion system at GlueX}},
  author = {Ilia Belov and Farah Afzal},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.37954},
  eprint = {2609.37954},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.37954},
}
RIS
TY  - UNPB
TI  - Search for π_1(1600) in a three-pion system at GlueX
AU  - Ilia Belov
AU  - Farah Afzal
PY  - 2026
DA  - 2026/09/29
PB  - arXiv
DO  - 10.48550/arxiv.2609.37954
UR  - https://arxiv.org/abs/2609.37954
AB  - The GlueX experiment in Hall D at Jefferson Lab enables studies of the light meson spectrum in γp interactions with a linearly polarized photon beam. GlueX aims in particular to search for hybrid mesons that have exotic quantum numbers and therefore cannot be classified as conventional hadrons. We present the search for the π_1(1600) meson by means of a partial-wave analysis of the π^+π^−π^− system produced off the Δ^++-baryon. Data with the selected three-pion final state are fitted in bins of m_3π as coherent sums of partial-wave amplitudes defined in the reflectivity basis. The properties of a_2^−(1320) production are investigated through the extracted signal in the ρ π^− D-waves. In this analysis, the overall m_3π lineshape will be extracted for each of the model contributions. The main interest lies in establishing the existence of a resonant 1^−+ contribution in the ρ π^− P-wave configuration.
ER  -