Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Formation and Collapse of False Vacuum Bubbles in Relativistic Heavy-Ion
  Collisions   It is possible that under certain situations, in a relativistic heavy-ion
collision, partons may expand out forming a shell like structure. We analyze
the process of hadronization in such a picture for the case when the
quark-hadron transition is of first order, and argue that the inside region of
such a shell must correspond to a supercooled (to $T = 0$) deconfined vacuum.
Hadrons from that region escape out, leaving a bubble of pure deconfined vacuum
with large vacuum energy. This bubble undergoes relativistic collapse, with
highly Lorentz contracted bubble walls, and may concentrate the entire energy
into extremely small regions. Eventually different portions of bubble wall
collide, with the energy being released in the form of particle production.
Thermalization of this system can lead to very high temperatures. With a
reasonably conservative set of parameters, at LHC, the temperature of the hot
spot can reach as high as 3 GeV, and well above it with more optimistic
parameters. Such a hot spot can leave signals like large $P_T$ partons,
dileptons, and enhanced production of heavy quarks. We also briefly discuss a
speculative possibility where the electroweak symmetry may get restored in the
highly dense region resulting from the decay of the bubble wall via the
phenomenon of non-thermal symmetry restoration (which is usually employed in
models of pre-heating after inflation). If that could happen then the
possibility may arise of observing sphaleron induced baryon number violation in
relativistic heavy-ion collisions.

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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: quant-ph