Effects of N*(1440) resonance on particle production in heavy-ion collisions at subthreshold energies
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We study quantitatively the effects of the N*(1440) resonance on the production of kaons, antikaons, and antiprotons in heavy-ion collisions at subthreshold energies. It is found that baryon-baryon collisions involving the N* have minor effects on the production of kaons and antikaons. For the production of antiprotons-considerably different from the previous finding that baryon-baryon collisions involving the Δ(1232) dominate-we found that collisions involving the N* are at least equally important as those involving the Δ. Medium effects such as the broadened resonance widths and decreased masses of nucleons and antinucleons are also discussed. © 1994 The American Physical Society.
author list (cited authors)
Li, B., Ko, C. M., & Li, G. Q.