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- W2342279239 abstract "We propose to study the $a_0(980)$ and the $Lambda(1670)$ resonances in the $Lambda^+_c to pi^+ eta Lambda$ decay via the final state interactions of the $pi^+ eta$ and $eta Lambda$ pairs. The weak interaction part proceeds through the $c$ quark decay process: $c(ud) to (s + u + bar d)(ud)$, while the hadronization part takes place in two different mechanisms. In the first mechanism, the $sud$ cluster picks up a $qbar{q}$ pair from the vacuum to form the $etaLambda$ meson-baryon pair while the $ubar{d}$ pair from the weak decay hadronizes into a $pi^+$. In the second, the $sud$ cluster turns into a $Lambda$, while the $ubar{d}$ pair from the $c$ decay picks up a $qbar{q}$ pair and hadronizes into a meson-meson pair ($pieta$ or $Kbar{K}$). Because the final $pi^+ eta$ and $eta Lambda$ states are in pure isospin $I = 1$ and $I=0$ combinations, the $Lambda^+_c to pi^+ eta Lambda$ decay can be an ideal process to study the $a_0(980)$ and $Lambda(1670)$ resonances. Describing the final state interaction in the chiral unitary approach, we find that the $pi^+ eta$ and $eta Lambda$ invariant mass distributions, up to an arbitrary normalization, show clear cusp and peak structures, which can be associated with the $a_0(980)$ and $Lambda(1670)$ resonances, respectively. The proposed mechanism can provide valuable information on the nature of these resonances and can in principle be test by facilities such as BEPCII." @default.
- W2342279239 created "2016-06-24" @default.
- W2342279239 creator A5027457123 @default.
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- W2342279239 date "2016-09-01" @default.
- W2342279239 modified "2023-09-27" @default.
- W2342279239 title "The $$a_0(980)$$ a 0 ( 980 ) and $$Lambda (1670)$$ Λ ( 1670 ) in the $$Lambda ^+_c rightarrow pi ^+ eta Lambda $$ Λ c + → π + η Λ decay" @default.
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- W2342279239 doi "https://doi.org/10.1140/epjc/s10052-016-4342-z" @default.
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