arXiv subjects

Kanchan P. Khemchandani

Publications and source records attributed to Kanchan P. Khemchandani.

2 recordsLinked to original sources

arXiv2025

Revisiting the three-kaon interaction and its relation with $K(1460)$

We test the hypothesis of $K(1460)$ being a hadronic $J^P=0^-$ molecule through nonperturbative $S$-wave $K K\bar K$, $Kππ$, $Kπη$ coupled-channel dynamics in a three-body unitary isobar approach. The scalar two-body coupled-channel resonances $f_0(500)$, $f_0(980)$, $a_0(980)$ and $K^*_0(700)$ are generated in the subsytems in amplitudes that match phase shifts from experiment. In a first step, previous results in the limit of mass-degenerate, stable $f_0$ and $a_0$ isobars are reproduced. Once the full seven-coupled channel model is switched on, other $S$-matrix effects obscure and modify the resonance signal, including complex thresholds, a two-body cusp, and a triangle singularity at threshold.

nucl-th↗

arXiv2024

Studying the nature of the lightest charmed axial mesons via femtoscopy

In this work we discuss how femtoscopic analysis can shed light on the nature of the two lightest axial charmed mesons, denominated as $D_1(2430)$ and $D_1(2420)$, whose masses are similar but widths are different. Their properties are reasonably described taking into account meson-meson coupled channel dynamics and a bare quark-model pole constituting the lowest-order amplitudes. Two different bare quark-model states are used in order to accommodate the different scattering lengths coming from the lattice QCD calculations for the $Dπ$ and $D^*π$ systems and the data from the ALICE Collaboration on the $Dπ$ system. The amplitudes are employed as inputs to determine the correlation functions for the $D^{*}π$ and $Dρ$ channels and identify the signatures associated with the lowest-lying axial charmed mesons.

hep-ph↗