Comments on “the OZI rule does not apply to baryons”

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<ul><li><p>Volume 234, number 1,2 PHYSICS LETTERS B 4 January 1990 </p><p>COMMENTS ON "THE OZI RULE DOES NOT APPLY TO BARYONS" ~r </p><p>S.J. L INDENBAUM ~,b and R.S. LONGACRE ~ Brookhaven National Laboratory, Upton, NY 11973, USA </p><p>b City CoLlege, City University of New York, New York, NY 10031, USA </p><p>Received 19 September 1989; revised manuscript received 23 October 1989 </p><p>We demonstrate that the arguments made by Ellis, Gabathuler and Karliner that meson-baryon couplings could evade the OZI rule are irrelevant to the arguments we have made before. This is so since even if we assume that meson-baryon couplings can violate OZI, we clearly demonstrate that the coupling involved in our r~-p-,g)gm is r~n-~g)9 which does not involve meson-baryon couplings. Thus our arguments that the gr (2010), gr' (2300) and gT" (2340) are naturally explained in the context of QCD by the hypothesis that one to three glueballs are produced in the intermediate state are not affected by arguments made by Ellis et al. </p><p>In ref. [ 1 ] the authors go through a number of ar- guments to conclude that the OZl rule does not apply to baryons, and thus conclude that the OZI rule can be evaded for meson-baryon couplings. </p><p>They then state at the end of their paper as follows: "We conclude this paper with a few comments on g luonium searches in processes with incident bar- yons. The fact that meson couplings to baryons vio- </p><p>late the OZI rule means that the observat ion o f a res- onance in an OZI forb idden channel does not necessari ly mean that it is a g luonium state. It could be an excited s~ state. This caut ion applies in partic- ular to the ~)O resonances reported in ref. [ 52 }." Their ref. [52] is refs. [2 -4 ] of this comment . </p><p>In ref. [3] we stated on p. 218: "P ion exchange re- actions are character ized by having only M r = J~ = 0 - waves present and a t ' -dependence of da/dt '~ exp( - 10It ' I ). Thus we conclude the product ion o f 09 proceeds via ~-exchange." </p><p>In ref. [4] ~ we clearly state (see p. 570 of ref. [ 5 ] ): Fig. 3 shows const. X d~r/dt' plotted versus I t' I for I t ' ld &gt;0 </p><p>Fig. 1. The Jet=2++ glueball intermediate state in n-p-~O*n. The region of crosshatched lines within the dash-dotted lines in- dicates that we do not know the details of the glueball hadroni- zation into 00- (Fig. 3b ofref. [7]. ). </p><p>0370-2693/90/$ 03.50 Elsevier Science Publishers B.V. ( North-Holland ) 163 </p></li><li><p>Volume 234, number 1,2 PHYSICS LETTERS B 4 January 1990 </p><p>vertex wh ich does not invo lve meson-baryon </p><p>coupl ings. Thus our gluebal l a rguments and conc lus ions [6 ] </p><p>are not af fected by the arguments of ref. [ 1 ]. </p><p>References </p><p>[ 1 ] J. Ellis, E. Gabathuler and M. Karliner, Phys. Lett. B 217 (1989) 173. </p><p>[2] A. Etkin et al., Phys. Rev. Lett. 49 (1982) 1620. [ 3 ] A. Etkin et al., Phys. Lett. B 165 ( 1985 ) 217. [4] A. Etkin et al., Brookhaven preprint BNL 4-716 (December </p><p>1987). </p><p>[5] A. Etkin et al., Phys. Len. B 201 (1988) 568. [ 6 ] S.J. Lindenbaum and R.S. Longacre, Phys. Lett. B 165 ( 1985 ) </p><p>2O2; S.J. Lindenbaum, The observation and phenomenology of glueballs, in: Superstrings, supergravity and unified theories, The ICTP Series in Theoretical Physics, Vol. 2 (Trieste, Italy, 1985) pp. 548-593; Glueballs in 2 ++ Q~ final states, in: Proc. BNL Workshop on Glueballs, hybrids, and exotic hadrons (Brookhaven National Laboratory, Upton, NY, August- September 1988), ed. S.U. Chung, American Institute of Physics Conference Proc. No. 185 (AIP, New York) pp. 68- 87. </p><p>[7] S.J. Lindenbaum, in: Proc. Second Aspen Winter Particle physics Conf., Vol. 490, Annals of the New York Academy of Sciences (New York, 1986) p. 61. </p><p>164 </p></li></ul>