Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studying Possible Anomalous Top-Quark Couplings at Photon Colliders   Search for new-physics through possible anomalous t tbar gamma, tbW and gamma
gamma H couplings which are generated by SU(2) X U(1) gauge-invariant
dimension-6 effective operators is discussed, using energy and angular
distributions of final charged-lepton/ b-quark in gamma gamma -> t tbar -> l X
/ bX for various beam polarizations. Optimal beam polarizations that minimize
uncertainty in determination of those non-standard couplings are found
performing an optimal-observable analysis.

33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg