Publication: Signatures of the two K1(1270) poles in D+ → νe+V P decay
Authors
Wang, Guan-Ying ; Roca Zamora, Luis ; Wang, En ; Liang, Wei-Hong ; Oset, Eulogio
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Publisher
SpringerOpen, EDP Sciences, Società Italiana di Fisica
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DOI
https://doi.org/10.1140/epjc/s10052-020-7939-1
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info:eu-repo/semantics/article
Description
© The Author(s) 2020. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/. This document is the Published version of a Published Work that appeared in final form in The European Physical Journal C. To access the final edited and published work see https://doi.org/10.1140/epjc/s10052-020-7939-1
Abstract
We analyze theoretically the D+ → νe+ρK¯ and D+ → νe+K¯ ∗π decays to see the feasibility to check the double pole nature of the axial-vector resonance K1(1270) predicted by the unitary extensions of chiral perturbation theory (UChPT). Indeed, within UChPT the K1(1270) is
dynamically generated from the interaction of a vector and a pseudoscalar meson, and two poles are obtained for the quantum numbers of this resonance. The lower mass pole couples dominantly to K∗π and the higher mass pole to ρK, therefore we can expect that different reactions weighing differently these channels in the production mechanisms enhance one or
the other pole. We show that the different final V P channels in D+ → νe+V P weigh differently both poles, and this is reflected in the shape of the final vector-pseudoscalar invariant mass distributions. Therefore, we conclude that these decays are suitable to distinguish experimentally the predicted double pole of the K1(1270) resonance.
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Citation
Eur. Phys. J. C (2020) 80:388
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