Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Baryon Stopping at HERA: Evidence for Gluonic Mechanism   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.

3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph