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- W201112198 abstract "The measurement of exclusive reactions at large momentum transfers provides an important testing ground for models of hard quark-quark scattering. We have measured cross sections or set upper limits for 12 meson-bryon (..pi../sup +-/p ..-->.. p..pi../sup +-/, p/rho//sup +-/, ..pi../sup +/..delta../sup +-/, K/sup +/..sigma../sup +-/, ..pi../sup /minus//p ..-->.. ..lambda../sup 0//..sigma../sup 0/K/sup 0/, K/sup +-/p ..-->.. pK/sup +-/) and 2 baryon-baryon (p/sup +-/p ..-->.. pp/sup /plus minus/) reactions near 90/degree/ C.M. by studying the flavor-dependence of these 2 exclusive reactions at t = -9(GeV/c)/sup 2/, we have been able to demonstrate in a perturbative QCD picture that the quark-interchange mechanism is dominant over gluon exchange and quark-antiquark annihilation. We will also present preliminary results on many of these reactions at t = -5(GeV/c)/sup 2/ with better resolution and statistical precision. 145 refs., 3 figs." @default.
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- W201112198 date "1988-01-01" @default.
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- W201112198 title "Study of quark flavor-dependence in exclusive reactions at large momentum transfers" @default.
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