$D^+ \to K_s^0 \pi^+ \eta$ reaction and $a_0(980)^+$

Natsumi Ikeno; Jorgivan M. Dias; Wei-Hong Liang; Eulogio Oset

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arXiv · 2402.04073

$D^+ \to K_s^0 \pi^+ \eta$ reaction and $a_0(980)^+$

Natsumi Ikeno·Jorgivan M. Dias·Wei-Hong Liang·Eulogio Oset

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Abstract

We study the $D^+ \to \bar K^0 \pi^+ \eta$ reaction where the $a_0(980)$ excitation plays a dominant role. We consider mechanisms of external and internal emission at the quark level, hadronize the $q \bar q$ components into two mesons and allow these mesons to undergo final state interaction where the $a_0(980)$ state is generated. While the $a_0(980)$ production is the dominant term, we also find other terms in the reaction that interfere with this production mode and, through interference with it, lead to a shape of the $a_0(980)$ significantly different from the one observed in other experiments, with an apparently much larger width.

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Natsumi Ikeno, Jorgivan M. Dias, Wei-Hong Liang, Eulogio Oset. 2024-02-06. $D^+ \to K_s^0 \pi^+ \eta$ reaction and $a_0(980)^+$. https://arxiv.org/abs/2402.04073

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