Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: UV Completion on the Worldline   A framework for UV completing particle theories is proposed, based on the
worldline formalism, which is equivalent to weighting all sums over histories
with a proper-time dependent measure that has a smallest proper-time. We deduce
a criterion to avoid ghosts, and find that the ghost-free theories have the
(string-theory inspired) infinite-derivative model of Siegel as a special case,
but represent a significant generalisation. Generically, the UV of such
theories is dominated by a saddle-point in the proper-time, leading to
simplification in the computation of amplitudes. We focus on a particularly
attractive option which is to mimic the regulating properties of modular
invariance with a worldline "inversion symmetry".

15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an