Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-relativistic bound states at finite temperature (I): the hydrogen
  atom   We illustrate how to apply modern effective field theory techniques and
dimensional regularization to factorize the various scales which appear in
non-relativistic bound states at finite temperature. We focus here on the
simplest case: the hydrogen atom. We discuss in detail the interplay of the
hard, soft and ultrasoft scales of the non-relativistic system at zero
temperature with the additional scales induced at finite temperature. We also
comment on the implications of our results for heavy quarkonium bound states in
the quark gluon plasma.

19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio