Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Blackbody radiation shift in the Sr optical atomic clock   We evaluated the static and dynamic polarizabilities of the 5s^2 ^1S_0 and
5s5p ^3P_0^o states of Sr using the high-precision relativistic configuration
interaction + all-order method. Our calculation explains the discrepancy
between the recent experimental 5s^2 ^1S_0 - 5s5p ^3P_0^o dc Stark shift
measurement \Delta \alpha = 247.374(7) a.u. [Middelmann et. al, arXiv:1208.2848
(2012)] and the earlier theoretical result of 261(4) a.u. [Porsev and
Derevianko, Phys. Rev. A 74, 020502R (2006)]. Our present value of 247.5 a.u.
is in excellent agreement with the experimental result. We also evaluated the
dynamic correction to the BBR shift with 1 % uncertainty; -0.1492(16) Hz. The
dynamic correction to the BBR shift is unusually large in the case of Sr (7 %)
and it enters significantly into the uncertainty budget of the Sr optical
lattice clock. We suggest future experiments that could further reduce the
present uncertainties.

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The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
18
The categories of this paper are: econ
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The categories of this paper are: q-fin
14
The categories of this paper are: math-ph