Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long range beam-beam interactions in PEP-II   The PEP-II luminosity upgrade foreseen for the next years requires an
increased number of bunches and lower beta-y* with minor modifications to the
present Interaction Region (IR2). When increasing the collision frequency the
beams separation in IR2 can be an issue. A study of the effect of the parasitic
crossings for both the head-on and horizontal crossing angle options is
presented.

27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin