ND and NB systems in quark delocalization color screening model

Abstract

− is also a possible resonance state. The results of the bottom case of N B system are similar to those of the N D system. Searching for these states will be a challenging subject of experiments.

Study of $$qqq{\bar{q}}Q$$ pentaquark system in the chiral quark model

“…Especially, we shift the energy of N D * state to 2943 MeV, which is close to the mass of c (2940). Our results support the existence of c (2940) as a state composed by a nucleon and D * meson with J P = 3 2 − , as similar conclusions obtained in Ref [20][21][22][23]. Furthermore, another state c ρ has disappeared in the channel coupling calculation, and the reason is that the channel coupling will push the higher state above the threshold.…”

Hadronic molecules

“…The analysis in (Guo and Oller, 2016b), however, indicates that the compositeness of Σ c (2455) + π 0 is smaller than 10% leaving Λ c (2595) dominated by either other heavier hadronic channels (such as N D and N D * ) or compact quark-gluon structures. Some other charm baryons, such as Λ c (2880) (Lutz and Kolomeitsev, 2004a), Λ c (2940) (He et al, 2010(He et al, , 2007Ortega et al, 2013;Zhang, 2014;Zhao et al, 2017) and Σ c (2800) (Jimenez-Tejero et al, 2011Zhang, 2014), have also been considered as dynamically generated states from meson-baryon interactions. In particular, the Λ c (2940) + is very close to the N D * threshold -it even overlaps with the threshold if using the recent LHCb measurement (Aaij et al, 2017d), and it can couple to N D * in an S-wave.…”

“…In particular, the Λ c (2940) + is very close to the N D * threshold -it even overlaps with the threshold if using the recent LHCb measurement (Aaij et al, 2017d), and it can couple to N D * in an S-wave. Both are favorable features for treating it as an N D * hadronic molecule (Ortega et al, 2013;Zhao et al, 2017).…”

Strong decays of observed Λc baryons in the P03Guo1, Yang2, Zhang3 2019Phys. Rev. D383270View full textAdd to dashboardCite

“…In addition to an S-wave D Ã N molecular state interpretation [25][26][27][28][29][30][31][32], Λ c ð2940Þ þ was interpreted as an excited charmed baryon with different J P quantum numbers, as shown in Table II.…”

“…Many tentative J P assignments to these Λ c states have been made in many models [3,. In addition to normal charmed baryon interpretations [3,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], there are also coupled-channel effect interpretations [23,24] and molecular state interpretations of these Λ c states [25][26][27][28][29][30][31][32]. In Table II, some possible J P assignments of Λ c states within the charmed baryon interpretations are presented.…”