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Baryon stopping and hyperon enhancement in the improved dual parton model
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We present an improved version of the dual parton model which contains a new realization of the diquark breaking mechanism of baryon stopping. We reproduce in this way the net baryon yield in nuclear collisions. The model, which also considers strings originating from diquark-antidiquark pairs in the nucleon sea, reproduces the observed yields of p and Lambda and their antiparticles and underestimates cascades by less than 50 %. However, Omega's are underestimated by a factor five. Agreement with data is restored by final state interaction, with an averaged cross-section as small as 0.14 mb. Hyperon yields increase significantly faster than antihyperons, in agreement with experiment.
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Radiative parton energy loss and baryon stopping in $AA$ collisions
Radiative diquark energy loss from induced gluon emission can partially fill the midrapidity dip in the net proton rapidity distribution in central AA collisions at sqrt(s) ~ 10 GeV, with the effect's size strongly de...
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