Production of pentaquark states in pp collisions within the microcanonical ensemble

Productions of hadrons, pentaquarksΘ+andΘ*++, and di-baryonShao1, Xie2, Wang3 2005Phys. Rev. C

“…Our predictions agree with those given by the statistical models [89,90]. For comparison, the yield of Θ + in proton-proton collision is predicted to be about 10 −2 − 10 −3 [92,93].…”

“…Our estimates for Θ + and Θ * ++ are shown in [89,90]. For comparison, the yield of Θ + in proton-proton collision is predicted to be about 10 −2 − 10 −3 [92,93].…”

Microcanonical pentaquark production ine+e−annihilations

“…Similar to the previous work [6], we add the pentaquark states Θ + (1540) and Ξ(1860) into S. The Θ + has quark contents [uudds]. The Ξ(1860) can be Ξ…”

“…To check this, we calculate in this paper the pentaquark production in e + e − annihilations. A theoretical comparison of pentaquark production between p+p [6] and e + e − processes may be helpful to the question if pentaquarks exist.…”

Strangeness observables and pentaquarks

“…(e.g. [17,75,76,77,78,79,80,81,82,83,84,85]). The current theoretical description of pentaquarks is extremely rich as well as important and usefull for further searches, while it should be noted that it does not lead to a unique picture on the pentaquark existence and characteristics.…”