E. Oset

activity

20242026

collaborators

21 papers

hep-ph2026

The $Ω (2380)$ as a partner of the $Ω (2012)$

Yi-Yao Li, Albert Feijoo, Eulogio Oset

We present a study of the $Ω (2380)$ resonance and show that it is consistent with a dynamically generated state arising from the $K ˉ^{*} Ξ^{*}$ , $ω Ω$ , and $ϕ Ω$ interactions. In thi…

hep-ph2025

$a_{0} (980)$ and $f_{0} (980)$ excitation in the $D^{+} \to π^{+} η η$ decay

Jing Song, Yi-Yao Li, Melahat Bayar +1

We have made a thorough study of the $D^{+} \to π^{+} η η$ reaction, recently measured by the BESIII collaboration, which shows an abnormal strength at high invariant masses in the $π η$ …

hep-ph2025

Study of hidden-charm, doubly-strange pentaquarks in $Λ_{b} \to J / ψ Ξ^{-} K^{+}$ and $Ξ_{b} \to J / ψ Ξ^{-} π^{+}$

L. Roca, J. Song, E. Oset

Hidden-charm pentaquark states with double strangeness, $P_{css}$ , have been predicted within the framework of unitary coupled-channel dynamics. In this work, we theoretically inve…

hep-ph2025

Correlation functions for $n D ˉ_{s 1} (2460)$ and $n D ˉ_{s 1} (2536)$

Breno Agatão, Pedro Brandão, A. Martinez Torres +3

We study the interaction of the $n D ˉ_{s 1} (2460)$ and $n D ˉ_{s 1} (2536)$ systems from the perspective that the $D_{s 1} (2460)$ and $D_{s 1} (2536)$ states are molecular sta…

hep-ph2025

Revisiting the $Λ_{c}^{+} \to Λ η π^{+}$ and the roles of intermediate resonances

En Wang, Wen-Tao Lyu, Man-Yu Duan +4

In this paper, we first review the theoretical and experimental studies of the process $Λ_{c}^{+} \to π^{+} η Λ$ . Motivated by the recent BESIII and Belle measurements, we have conducted…

hep-ph2025

Revisiting the $Λ_{c}^{+} \to K ˉ^{0} η p$ reaction: the role of $N^{} (1535), N^{} (1650)$ and $Σ (1620)$

Jing Song, Melahat Bayar, Yi-Yao Li +1

We perform a theoretical study of the weak decay $Λ_{c}^{+} \to K ˉ^{0} η p$ using a coupled-channel chiral unitary approach that incorporates both pseudoscalar-baryon and vec…

hep-ph2025

Final state interaction in the $Λ_{b} \to D^{+} D^{-} Λ, D^{0} D_{s}^{-} p, D_{s}^{+} D_{s}^{-} Λ$ reactions

Jing Song, Melahat Bayar, Eulogio Oset

We study the three-body decays $Λ_b \to D^+ D^- Λ,~D^0D_s^- p,~D_s^+D_s^-Λ$, considering both internal and external emission mechanisms that produce various meson-baryon final st…

hep-ph2025

Molecular states with bottom mesons and multistrange baryons systems

Jing Song, Yi-Yao Li, Eulogio Oset

We investigate molecular states formed by bottom mesons and multistrange baryons from both octet and decuplet flavor representations, using the local hidden gauge approach combined…

hep-ph2025

Exotic multistrange-anticharm baryon systems

Jing Song, Eulogio Oset

We study exotic baryon systems composed of anticharmed mesons and strange baryons using the extended local hidden gauge approach. By solving the coupled-channel Bethe-Salpeter equa…

hep-ph2025

On the $π^{+} π^{-}$ and $D_{s}^{+} π^{\pm}$ mass spectra in the $D_{s 1} (2536) \to D_{s}^{+} π^{+} π^{-}$ decays

Jorgivan Morais Dias, Yi-Yao Li, Eulogio Oset

We have carried out an evaluation of the $π^{+} π^{-}$ and $D_{s}^{+} π^{+}$ mass distributions in the $D_{s 1} (2536)$ decay to $D_{s}^{+} π^{+} π^{-}$ , from the perspective that the $D_{s 1} (2536)$ i…

hep-ph2025

Correlation function for the $n D ˉ_{s 0}^{*} (2317)$ interaction and the issue of elastic unitarity

Natsumi Ikeno, Eulogio Oset

We study the interaction of a neutron with the $D ˉ_{s 0}^{*} (2317)$ resonance and look at the amplitude below threshold and close above threshold. The study is done from the persp…

hep-ph2025

Off-shell ambiguities in correlation functions: strategies to minimize them

R. Molina, E. Oset

We face here the problem of uncertainties in correlation functions due to the freedom in the off-shell dependence of the wave functions, or equivalently, off-shell ambiguities in t…

hep-ph2025

Testing the nature of the $Σ^{*} (1430)$

Jia-Xin Lin, Jing Song, Miguel Albaladejo +2

We study the feasibility of having the $Σ^{*} (1430)$ state, predicted within the chiral unitary approach and recently reported by the Belle Collaboration, as corresponding to a state…

hep-ph2025

Determination of the $K^{+} K ˉ^{0}$ scattering length and effective range from the $D^{+} \to K ˉ^{0} π^{+} η$ reaction

Jing Song, Wei-Hong Liang, Eulogio Oset

We study the scattering parameters of the $K^+\bar{K}^0$ system through the analysis of the $D^+\to\bar{K}^0π^+η$ reaction, aiming at determining the scattering length $a$ an…

hep-ph2025

The $D_{s 1} (2460) \to D_{s} π^{+} π^{-}$ decay from a $D_{s 1}$ molecular perspective

L. Roca, J. M. Dias, E. Oset

We conduct a theoretical study of the $D_{s 1} (2460) \to D_{s} π^{+} π^{-}$ decay from the perspective that the $D_{s 1}$ is a molecular state, built mostly from the $D^{*} K$ and $D_s^* η…

hep-ph2025

Searching for the $2^{+}$ partner of the $T_{cs 0} (2870)$ in the $B^{-} \to D^{-} D^{0} K_{S}^{0}$ reaction

Jing Song, Zi-Ying Yang, Eulogio Oset

We study the $B^{-} \to D^{-} D^{0} K_{S}^{0}$ reaction, recently analyzed by the LHCb collaboration, where a clear signal for the exotic $T_{cs 0} (2870)$ state has been reported. We call the…

hep-ph2025

Correlation function for the $p f_{1} (1285)$ interaction

Pablo Encarnación, Albert Feijoo, Eulogio Oset

We have addressed here the problem of calculating the correlation function of a stable particle with a resonance, in particular one resonance that qualifies as a molecular state of…

hep-ph2025

Role of $a_{0} (1710)$ in the $D_{s}^{+} \to ρ^{+} ϕ, ρ^{+} ω$ decays

Jing Song, Zi-Ying Yang, Eulogio Oset

We look into the $D_{s}^{+} \to ρ^{+} ϕ$ and $D_{s}^{+} \to ρ^{+} ω$ weak decays recently measured by the BESIII collaboration, which proceed very differently in a first step of the weak decay…

hep-ph2024

Searching for signals of an exotic $I = 1, J^{P} = 2^{+}$ state of $D^{} K^{}$ nature and the structure of the $P_{c} (4312)$ in the $Λ_{b} \to Σ_{c}^{++} D^{-} K^{-}$ reaction

Jing Song, Zi-Ying Yang, Eulogio Oset

This paper investigates the decay process $Λ_{b} \to Σ_{c}^{++} D^{-} K^{-}$ with the objective of finding a predicted molecular state with isospin $I = 1$ , $J^{P} = 2^{+}$ of $D^{*} K^{*}$ nature, pl…

hep-ph2024

Photoproduction of the $Λ (1800)$

Melahat. Bayar, Jing Song, L. R. Dai +1

We have carried out a study of the $γ p \to p K^{+} K^{*-} (K^{*-} \to K^{-} π^{0})$ , $γ p \to p K^{+} K^{*-} (K^{*-} \to K ˉ^{0} π^{-})$ a…

hep-ph2024

Searching for the two poles of the $Ξ (1820)$ in the $ψ (3686) \to Ξ ˉ^{+} K ˉ^{0} Σ^{*-} (π^{-} Λ)$ decay

Man-Yu Duan, Jing Song, Wei-Hong Liang +1

We propose the reaction $ψ (3686) \to Ξ ˉ^{+} K ˉ^{0} Σ^{*-}$ , with the $Σ^{*-}$ decaying to $π^{-} Λ$ in order to show evidence for the existence of two $Ξ (1820)$ states, one aroun…

The Ω(2380) as a partner of the Ω(2012)

a0​(980) and f0​(980) excitation in the D+→π+ηη decay

Study of hidden-charm, doubly-strange pentaquarks in Λb​→J/ψΞ−K+ and Ξb​→J/ψΞ−π+

Correlation functions for nDˉs1​(2460) and nDˉs1​(2536)

Revisiting the Λc+​→Ληπ+ and the roles of intermediate resonances

Revisiting the Λc+​→Kˉ0ηp reaction: the role of N∗(1535), N∗(1650) and Σ(1620)

Final state interaction in the Λb​→D+D−Λ, D0Ds−​p, Ds+​Ds−​Λ reactions

Molecular states with bottom mesons and multistrange baryons systems

Exotic multistrange-anticharm baryon systems

On the π+π− and Ds+​π± mass spectra in the Ds1​(2536)→Ds+​π+π− decays

Correlation function for the nDˉs0∗​(2317) interaction and the issue of elastic unitarity

Off-shell ambiguities in correlation functions: strategies to minimize them

Testing the nature of the Σ∗(1430)

Determination of the K+Kˉ0 scattering length and effective range from the D+→Kˉ0π+η reaction

The Ds1​(2460)→Ds​π+π− decay from a Ds1​ molecular perspective

Searching for the 2+ partner of the Tcs0​(2870) in the B−→D−D0KS0​ reaction

Correlation function for the p f1​(1285) interaction

Role of a0​(1710) in the Ds+​→ρ+ϕ, ρ+ω decays

Searching for signals of an exotic I=1,JP=2+ state of D∗K∗ nature and the structure of the Pc​(4312) in the Λb​→Σc++​D−K− reaction

Photoproduction of the Λ(1800)

Searching for the two poles of the Ξ(1820) in the ψ(3686)→Ξˉ+Kˉ0Σ∗−(π−Λ) decay

The $Ω (2380)$ as a partner of the $Ω (2012)$

$a_{0} (980)$ and $f_{0} (980)$ excitation in the $D^{+} \to π^{+} η η$ decay

Study of hidden-charm, doubly-strange pentaquarks in $Λ_{b} \to J / ψ Ξ^{-} K^{+}$ and $Ξ_{b} \to J / ψ Ξ^{-} π^{+}$

Correlation functions for $n D ˉ_{s 1} (2460)$ and $n D ˉ_{s 1} (2536)$

Revisiting the $Λ_{c}^{+} \to Λ η π^{+}$ and the roles of intermediate resonances

Revisiting the $Λ_{c}^{+} \to K ˉ^{0} η p$ reaction: the role of $N^{} (1535), N^{} (1650)$ and $Σ (1620)$

Final state interaction in the $Λ_{b} \to D^{+} D^{-} Λ, D^{0} D_{s}^{-} p, D_{s}^{+} D_{s}^{-} Λ$ reactions

On the $π^{+} π^{-}$ and $D_{s}^{+} π^{\pm}$ mass spectra in the $D_{s 1} (2536) \to D_{s}^{+} π^{+} π^{-}$ decays

Correlation function for the $n D ˉ_{s 0}^{*} (2317)$ interaction and the issue of elastic unitarity

Testing the nature of the $Σ^{*} (1430)$

Determination of the $K^{+} K ˉ^{0}$ scattering length and effective range from the $D^{+} \to K ˉ^{0} π^{+} η$ reaction

The $D_{s 1} (2460) \to D_{s} π^{+} π^{-}$ decay from a $D_{s 1}$ molecular perspective

Searching for the $2^{+}$ partner of the $T_{cs 0} (2870)$ in the $B^{-} \to D^{-} D^{0} K_{S}^{0}$ reaction

Correlation function for the $p f_{1} (1285)$ interaction

Role of $a_{0} (1710)$ in the $D_{s}^{+} \to ρ^{+} ϕ, ρ^{+} ω$ decays

Searching for signals of an exotic $I = 1, J^{P} = 2^{+}$ state of $D^{} K^{}$ nature and the structure of the $P_{c} (4312)$ in the $Λ_{b} \to Σ_{c}^{++} D^{-} K^{-}$ reaction

Photoproduction of the $Λ (1800)$

Searching for the two poles of the $Ξ (1820)$ in the $ψ (3686) \to Ξ ˉ^{+} K ˉ^{0} Σ^{*-} (π^{-} Λ)$ decay