Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Search for new physics in e^\pm q contact interactions at HERA   Deep-inelastic e^\pm p scattering at high squared momentum transfer Q^2 up to
30000 GeV^2 is used to search for eq contact interactions associated to scales
far beyond the HERA centre of mass energy. The neutral current cross section
measurements d sigma / d Q^2, corresponding to integrated luminosities of 16.4
pb^-1 of e^- p data and 100.8 pb^-1 of e^+ p data, are well described by the
Standard Model and are analysed to set constraints on new phenomena. For
conventional contact interactions lower limits are set on compositeness scales
Lambda ranging between 1.6 - 5.5 TeV. Couplings and masses of leptoquarks and
squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3
- 1.4 TeV. A search for low scale quantum gravity effects in models with large
extra dimensions provides limits on the effective Planck scale of M_S > 0.8
TeV. A form factor analysis yields a bound on the radius of light quarks of R_q
< 1.0 x 10^-18 m.

21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
16
The categories of this paper are: stat