Publication: Discerning the two $K_1(1270)$ poles in $D^0\to \pi^+ V P$ decay
Authors
Wang, Guan Ying ; Roca Zamora, Luis ; Oset, E.
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Publisher
American Physical Society
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DOI
https://doi.org/10.1103/PhysRevD.100.074018
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info:eu-repo/semantics/article
Description
Abstract
Within the chiral unitary approach, the axial-vector resonance 𝐾1(1270) has been predicted to manifest a two-pole nature. The lowest pole has a mass of 1195 MeV and a width of 246 MeV and couples mostly to 𝐾*𝜋, and the highest pole has a mass of 1284 MeV and a width of 146 MeV and couples mostly to 𝜌𝐾. We analyze theoretically how this double-pole structure can show up in 𝐷0 →𝜋+𝑉𝑃 decays by looking at the vector-pseudoscalar (𝑉𝑃) invariant mass distribution for different 𝑉𝑃 channels, exploiting the fact that each pole couples differently to different 𝑉𝑃 pairs. We find that the final
¯𝐾*𝜋 and 𝜌¯𝐾 channels are sensible to the different poles of the 𝐾1(1270) resonance and hence are suitable reactions to analyze experimentally the double-pole nature of this resonance.
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Citation
Phys. Rev. D 100, 074018 (2019)
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