SELEX experiment (Fermilab E781)

Charmed hadron production in pp collision

“…There is a strong preference for the production of charmed baryons over antibaryons, while that for charmed antimesons over mesons. The comparison of the asymmetric behaviour of K c particles production with the experiment [20] at ffiffi s p ¼ 31:9 GeV gives a satisfactory agreement. There is no well defined pattern for the asymmetric tendency of charmed hadroproduction as a function of p ?…”

“…This behaviour of production of charmed hadrons is similar to that with ffiffi s p for all values of x F . We have compared the results of K c particles at ffiffi s p ¼ 31:9 GeV with the experimental data from [20]. It is observed that the agreement is quite satisfactory.…”

Resolving the SELEX–LHCb double-charm baryon conflict: the impact of intrinsic heavy-quark hadroproduction and supersymmetric light-front holographic QCD

“…The central value for the number N Λ + c /ǫ Λ + c of reconstructed Λ + c baryon events reported in Ref. [19] lies between 13326 and 10010 according to whether the lowest bin with x F ∈ [0.125, 0.175] is taken into account or not. If we take into account the intrinsic charm mechanism, the reconstruction efficiency of Ξ + cc will grow at least by a factor of 2.3 mainly because the x F distribution predicted by the intrinsic charm mechanism at large Feynman x F is well matched to the acceptance of the SELEX fixed-target experiment [2] (cf.…”

LEADING EFFECTS IN HADROPRODUCTIONS OF ΛcAND D FROM CONSTITUENT QUARK–DIQUARK CASCADE PICTURE

“…In this section, we give the results of our model for charmed hadron productions in p, Σ − , π − and K In Fig.3, we show the x distributions of Λ c andΛ c in p, Σ − , π − and K − beam interactions with C and Cu targets in arbitrary unit and compare the results with the experimental data E781 [23]. The shapes of Λ c andΛ c in p, Σ − and π − fragmentation regions are well explained by our model.…”

“…Productions of Λ c andΛ c in Σ − A [2,22] and Σ − A, pA and π − A collisions [23] have been measured and analyzed in Refs. [13,15,17,24] and [25].…”