Strange hidden-charm PψsΛ(4459) and PψsΛ(4338) pentaquarks and additional PψsΛ, PψsΣ and PψssN candidates in a quark model approach

Abstract

Hidden-charm pentaquark-like PψsΛ(4459)0 and PψsΛ(4338) resonances are studied in a constituent quark model as molecular meson-baryon structures. Such states are found in the JP(I)=12−(0) channel with masses and widths compatible with the experimental measurements in a coupled-channels calculation with all the parameters constrained from previous studies. Other candidates are explored in the JP=12−, 32− and 52− channels in the charm and bottom sectors, with isospins 0 (PψsΛ and PϒsΛ) and 1 (PψsΣ and PϒsΣ). Additionally, the formalism is extended to study the PψssN (PϒssN) pentaquarks, where eight candidates are predicted as D¯sΞc molecules in I=12, with JP=12−, 32− and 52− for the charm sector and nine candidates as BsΞb for the bottom one.

Keywords

• Quark model
• Charmed baryon
• Baryon-meson molecules
• Hidden-charm pentaquarks
• Hidden-bottom pentaquarks