caa a22 4500 465801838 CHVBK 20180323112054.0 cr unu---uuuuu 170327e19900301xx s 000 0 eng 10.1007/BF01289351 doi (NATIONALLICENCE)springer-10.1007/BF01289351 Something, but not much follows from the quark line rule in nucleon-antinucleon annihilations [Elektronische Daten] [H. Genz, M. Martinis, S. Tatur] Validity and consequences of the quark line rule (QLR) in nucleon (N)— antinucleon (¯N) annihilations into two or three mesons at LEAR energies are investigated. Recent data on proton-antiproton annihilation into anη orη′ together with additional non-strange pseudoscalar or vector meson (s) is used to successfully test the rule. We find that for present data any pseudoscalar meson mixing angle ΦPS restricted to −260<ΦPS<−2.20 is approximately consistent with the QLR. Since the assumptions leading to this test are valid in any present-day quark model of nucleon-antinucleon annihilation, improvement of the data will be of utmost importance. If proven valid, the QLR can be used to test if quark-antiquark annihilation dominates over quark exchange inN¯N → mesons at LEAR energies or vice versa. Previously proposed tests of the quark line diagrams (annihilation or rearrangement) describing the quark flavor flux under either of these assumptions are worked out. We investigate without a definite conclusion if dominance of annihilation over rearrangement is consistent with present data onp¯p → π0 π0,ηη, π0ρ0, π0ω, ηρ0,ηω, ρ0ρ0,ωω. As a main consequence, dominance of annihilation predicts without any ambiguity equality of the proton-antiproton annihilation cross sections σ(ωω) and σ(ρ0ρ0). Further consequences of dominance of either annihilation or rearrangement diagrams for proton-antiproton annihilation into two or three mesons are also worked out. We compare the predictions of the models we discuss to the sparse present data. It is emphasized that our predictions only exploit the quark flavor flux within the quark line diagrams that are assumed to dominate. They thus are independent of gluon contributions to these diagrams. Springer-Verlag, 1990 13.75.Cs nationallicence 21.30.+y nationallicence 11.30.Hv nationallicence Genz H. Institut für Theoretische Kernphysik der Universität Karlsruhe, Federal Republic of Germany aut Martinis M. Institute Rudjer Boskovic, Zagreb, Yugoslavia aut Tatur S. Astronomical Center, Polish Academy of Sciences, Warsaw, Poland aut Zeitschrift für Physik A Atomic Nuclei Springer-Verlag 335/1(1990-03-01), 87-94 0939-7922 335:1<87 1990 335 218 https://doi.org/10.1007/BF01289351 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01289351 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Genz H. Institut für Theoretische Kernphysik der Universität Karlsruhe, Federal Republic of Germany aut NATIONALLICENCE 700 1- Martinis M. Institute Rudjer Boskovic, Zagreb, Yugoslavia aut NATIONALLICENCE 700 1- Tatur S. Astronomical Center, Polish Academy of Sciences, Warsaw, Poland aut NATIONALLICENCE 773 0- Zeitschrift für Physik A Atomic Nuclei Springer-Verlag 335/1(1990-03-01), 87-94 0939-7922 335:1<87 1990 335 218 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer