Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bose-Einstein momentum correlations at fixed multiplicities: Lessons
  from an exactly solvable thermal model for $pp$ collisions at the LHC   Two-particle momentum correlations of $N$ identical bosons are studied in the
quantum canonical ensemble. We define the latter as a properly selected
subensemble of events associated with the grand canonical ensemble which is
characterized by a constant temperature and a harmonic-trap chemical potential.
The merits of this toy model are that it can be solved exactly, and that it
demonstrates some interesting features revealed recently in small systems
created in $p+p$ collisions at the LHC. We find that partial coherence can be
observed in particle emission from completely thermal ensembles of events if
instead of inclusive measurements one studies the two-boson distribution
functions related to the events with particle numbers selected in some fixed
multiplicity bins. The corresponding coherence effects increase with the
multiplicity.

32
The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
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The categories of this paper are: eess
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
3
The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin