The $a_0(980)$ in the single Cabibbo-suppressed process $Λ_c \to π^0ηp$

The scalars $a_0(980)$ and $f_0(980)$ in the process $D_s^+ \to K^{+} K^{-} π^{+}$

“…Later, we have proposed to study the role of a 0 (980) in the process Λ c → π 0 ηp in Ref. [15]. In addition, we have studied the process D + → π + π 0 η, and conclude that there should be clear signals of a 0 (980) in the π + η and π 0 η mass distributions, respectively, which can be tested by the more precise measurements in future [16].…”

“…The reason should be that the Breit-Wigner lineshape for the resonance are not available close to the threshold, as discussed in Refs. [6][7][8][9] As we known, there are still many explanations for the structures of the light scalar mesons a 0 (980), f 0 (980), and f 0 (500) [10], and lots of the information about the charmed hadron decays, accumulated in the last decade, has provided an ideal platform to investigate these light scalar mesons [11][12][13][14][15][16][17][18][19][20][21]. In particular, the advent of the chiral unitary approach for the meson-meson interaction allows one to make some valuable predictions with a minimum input [22][23][24][25][26].…”

Search for a $D \bar{D}$ bound state in the $Λ_b \rightarrow ΛD\bar{D}$ process

“…In analogy to Refs. [37][38][39][40][41], the mechanism of the decay Λ b → ΛD D (D D ≡ D 0 D0 , D + D − ) can happen via three steps: the weak decay, hadronization, and the final state interaction. In the first step as depicted in Fig.…”

Cabibbo-favored $Λ^+_c\toΛa_{0}(980)^+$ decay in the final state interaction

“…According to the estimation of B(Λ + c → pηπ 0 ) [5], B(Λ + c → pa 0 0 ) should be around 10 −5 − 10 −4 , by which B(Λ + c → pa 0 0 , a 0 0 → K + K − ) agrees with B(Λ…”

“…Hence, one considers the Cabibbo-suppressed Λ + c → pK + K − decay to seek the S 0 states, which includes Λ + c → pa 0 0 (f 0 ), a 0 0 (f 0 ) → K + K − [4]. Similarly, there can be the resonant Λ + c → pa 0 0 , a 0 0 → ηπ 0 decay for Λ + c → pηπ 0 [5].…”