Rescattering mechanisms for $$\bar pd \to pX$$ reactions

Abstract

Inclusive proton spectra for the reactions #d~3rcp, #d ~ 5rcp, and #d ~ KKmrcp are calculated. In addition to nucleon exchange, the rescattering of pions and kaons, and the production and absorption of heavy mesons is evaluated. In the proton spectator momentum regime of 200 to 600 MeV/c, the role of heavy mesons is found to be negligible. The proper counting of the topological variants of pion and kaon rescattering can explain the cross sections with the exception of the #d ~ 3rcp channel.

Charmed meson rescattering in the reaction $$ \bar pd \uparrow \bar DDN $$

“…[31], but are in contradiction to the conclusions of Ref. [78], where the spectator proton momentum distribution is well reproduced by taking into account the Born diagram of Fig.…”

“…But we should say that the off-shell corrections of Eq. (6), not considered in the present investigation, are known to lead to variations of the order of 30% or more in the absolute value of the rescattering contribution, though they do not effect the shape of the spectator proton distribution [31].…”

Relativistic calculation for the reactions $$\bar p$$ d ? 5?p and $$\bar p$$ d ? 3?p at rest

“…3, the short-dashed line in Fig. 4 shows the corresponding results from the non-relativistic calculation [6]. They are again close to the relativistic results.…”

“…Note that the peak contribution due to the D-wave is approximately 70 times smaller than the peak S-wave contribution. We remark that the usual two term S-state Hulth6n wave function simulates The comparison of the fully relativistic calculation to the non-relativistic calculation of [6] is also shown in Fig. 3 (short-dashed line).…”

“…The topological enhancement factor of Ref. 6 has not been included yet. The S-state contribution is indicated by the long-dashed line, and the D-state contribution is indicated by the dot-dashed line.…”