Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electroweak probes with ATLAS   Measuring electroweak bosons in relativistic heavy ion collisions at high
energy provide an opportunity to understand temporal evolution of the
quark-gluon plasma created in such collisions by constraining the initial state
of the interaction. Due to lack of color charges the bosons and or particles
produced in their leptonic decays are unaffected by the quark-gluon plasma and
therefore preserve the information about the very early stage of the collision
when they were born. This singles electroweak bosons as a unique and very
interesting class of observables in heavy ion collisions. The ATLAS experiment
at LHC measures production of electroweak bosons in pp, p+Pb, and Pb + Pb
collisions systems. A review of the existing results is given in this
proceeding that includes studies made with isolated photons to constraint
kinematic properties and flavour composition of associated jets, measurements
of W and Z bosons used to estimate nuclear modification of parton distribution
function and the production rates of the bosons used to verify geometric models
implied to estimate event centrality. A novel analysis on measuring
two-particle correlations in pp collisions where the Z boson is registered is
also discussed in the proceeding. This is the first attempt to break into the
initial geometry of the pp collisions by constraining the impact parameter with
a hard scattering process. It shows that the strength of the two particle
correlations in such collision is 1.08+/-0.06 above the inclusive. To make the
measurement ATLAS solves the technical problem of measuring the underlying
event in high pileup condition.

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The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: q-bio
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The categories of this paper are: eess
2
The categories of this paper are: math