Baryon Stopping at HERA: Evidence for Gluonic Mechanism

Details Baryon Stopping at HERA: Evidence for Gluonic Mechanism Baryon Stopping at HERA: Evidence for Gluonic Mechanism

1998-10-29

arxiv.org/abs/hep-ph/9810530v4

Phys.Lett. B446 (1999) 321-325

Physics

High Energy Physics

High Energy Physics - Phenomenology

Small corrections suggested by the referee improving style and clarity are made

Scientific paper

10.1016/S0370-2693(98)01546-9

Recent results from the H1 experiment [1] have confirmed the existence of a substantial baryon asymmetry of the proton sea at small $x$ with magnitude predicted in hep-ph/9607486. This is a strong support for the idea [3] that baryon number can be transferred by gluons through a large rapidity interval without attenuation. In this paper we calculate the dependence of baryon asymmetry on associated multiplicity of produced hadrons which turns out to be very sensitive to the underlying dynamics. Comparison with data [1] confirms the dominance of the gluonic mechanism of baryon number transfer and excludes any substantial contribution of valence quark exchange.

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