Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Production and anisotropic flow of thermal photons in most-central
  $\alpha$-clustered C+Au collisions at BNL Relativistic Heavy Ion Collider   The presence of $\alpha$-clustered structure in the light nuclei produces
different exotic shapes in nuclear structure studies at low energies. Recent
phenomenological studies suggest that collision of heavy nuclei with
$\alpha$-clustered carbon ($^{12}$C) at relativistic energies can lead to large
initial state anisotropies. This is expected to impact the final momentum
anisotropies of the produced particles significantly. The emission of
electromagnetic radiations is considered to be more sensitive to the initial
state compared to hadronic observables and thus photon observables are expected
to be affected by the initial clustered structure profoundly. In this work we
estimate the production and anisotropic flow of photons from most-central
collisions of triangular $\alpha$- clustered carbon and gold at $\sqrt{s_{\rm
NN}}=200$ GeV at RHIC using an event-by-event hydrodynamic framework and
compare the results with those obtained from unclustered carbon and gold
collisions. We show that the thermal photon $v_3$ for most central collisions
is significantly large for the clustered case compared to the case with
unclustered carbon, whereas the elliptic flow parameter does not show much
difference for the two cases. In addition, the ratio of anisotropic flow
coefficients is found to be a potential observable to constrain the initial
state produced in relativistic heavy-ion collisions and also to know more about
the $\alpha$-clustered structure in carbon nucleus.

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The categories of this paper are: stat
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The categories of this paper are: eess
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The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
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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: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
2
The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: gr-qc