Unitarity approach to the mass-dependent fit of 3π resonance production data from the COMPASS experiment

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https://doi.org/10.1051/epjconf/201713705017
https://doi.org/10.1051/epjconf/201713705017

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2017-03-22

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https://hdl.handle.net/2022/32294

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We derive a unitarized model for the peripheral production of the three-pion system in the isobar approximation. The production process takes into account long-range t-channel pion exchange. The K-matrix approach is chosen for the parameterization of the scattering amplitude. Five coupled channels are used to fit the COMPASS spin-density matrices for the JPC Mϵ = 2$^{−+}0^+$ sector. Preliminary results of the fit are presented.

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Mikhasenko, Mikhail, et al. "Unitarity approach to the mass-dependent fit of 3π resonance production data from the COMPASS experiment." EPJ Web Conf., vol. 137, 2017-3-22, https://doi.org/10.1051/epjconf/201713705017.

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EPJ Web Conf.

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Faculty Open Access Articles