Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterizing quark gluon plasma by dilepton interferometry   The Hanbury-Brown-Twiss (HBT) radii have been calculated from the two
particle correlation functions with virtual photons produced in the collisions
of two nuclei at ultra-relativistic energies. We show that the variation of the
HBT radii with the invariant mass of the virtual photon can be used to
characterize and distinguish the hadronic as well as the partonic phase that
might have produced initially in the collisions. It has been illustrated that
the non-monotonic variation of the HBT radii with invariant mass provides an
access to the development of collective flow in the system.

1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ