Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revisiting chameleon gravity - thin-shells and no-shells with
  appropriate boundary conditions   We derive analytic solutions of a chameleon scalar field $\phi$ that couples
to a non-relativistic matter in the weak gravitational background of a
spherically symmetric body, paying particular attention to a field mass $m_A$
inside of the body. The standard thin-shell field profile is recovered by
taking the limit $m_A*r_c \to \infty$, where $r_c$ is a radius of the body. We
show the existence of "no-shell" solutions where the field is nearly frozen in
the whole interior of the body, which does not necessarily correspond to the
"zero-shell" limit of thin-shell solutions. In the no-shell case, under the
condition $m_A*r_c \gg 1$, the effective coupling of $\phi$ with matter takes
the same asymptotic form as that in the thin-shell case. We study experimental
bounds coming from the violation of equivalence principle as well as
solar-system tests for a number of models including $f(R)$ gravity and find
that the field is in either the thin-shell or the no-shell regime under such
constraints, depending on the shape of scalar-field potentials. We also show
that, for the consistency with local gravity constraints, the field at the
center of the body needs to be extremely close to the value $\phi_A$ at the
extremum of an effective potential induced by the matter coupling.

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The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess