Production of the charmed baryonΛc(2940)+at PANDA

Abstract

In this work we evaluate the production rate of the charmed baryon Λ c (2940) + at PANDA. For possible assignments of Λ c (2940) + : J P = 1/2 ± , 3/2 ± and 5/2 ± , the total cross section of p p → Λc Λ c (2940) + is estimated, which may exceed 1 nb. With the designed luminosity (2 × 10 −32 cm −2 /s) of PANDA, our estimate indicates that ten thousand events per day if Λ c (2940) + is of J P = 1/2 + or 10 8 per day if it is of J P = 5/2 + can be expected. Those values actually set the lower and upper limits of the Λ c (2940) + production. In addition, we present the Dalitz plot and carry out a rough background analysis of the Λ c (2940) + production in the p p → D 0 p Λc and p p → Σ 0,++ c π +,− Λc processes, which would provide valuable information for accurate determination of the Λ c (2940) + identity.

Role of the hadron moleculeΛc(2940)in theppDong1, Faessler2, Gutsche3 et al. 2014Phys. Rev. D392550View full textAdd to dashboardCite

“…Note, in Ref. [14] such couplings were fixed from the two-body decay widths of the Λ c (2940) assuming that this widths are the same for all spin-parity assignments. Obviously, this procedure is not quite consistent because of the different spin-parity structures and phase spaces.…”

“…In Ref. [14] it was discussed the production rate of Λ c (2940) at the forthcomingP ANDA experiment based the different assignments for the Λ c (2940) spin-parity. It is a first calculation for the total cross section but for example initial state interaction and the contribution of D * meson exchange are not considered.…”

J/ψ(ηc)NandϒXiao1, Meißner2 2015Phys. Rev. D

“…Even if there are different opinions on the structure of these two new states, one should keep in mind that both of them are found in the J/ψp mass spectrum. This is the motivation of the present work to look into the J/ψN cross sections, where N represents the nucleon.Due to the heavy quark masses of c, b, and the couplings not known in the heavy charm and beauty sectors, which lead to the symmetry breaking in the heavy sector, with some assumptions and extrapolations for the interaction Lagrangian, one can get some insight into the heavy charm and beauty baryons [17][18][19][20][21]. Working on the heavy sector, one should take into account the heavy quark spin and flavour symmetry [22][23][24], which has been applied to the heavy mesonmeson interactions [25,26] and heavy meson-baryon interactions [27,28].…”

Role of theΛc+(2940)in theπXie1, Dong2, Cao3 2015Phys. Rev. D410270View full textAdd to dashboardCite

“…For the exchanged D * 0 meson, we adopt the monopole form factor following that used in Refs. [8,9,30,31],…”

“…[8,9], where the total and differential cross sections of the pp → pD 0Λ c (2286) reac- * Electronic address: xiejujun@impcas.ac.cn † Electronic address: dongyb@ihep.ac.cn ‡ Electronic address: caoxu@impcas.ac.cn tion were studied. In Ref.…”