Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Understanding the Role of Jet and Underlying Event in p+p and d+Au
  Collisions from PHENIX at RHIC   Dihadron azimuthal correlation measurements have revealed striking
modifications of the jets by the dense medium created in heavy-ion collisions
at RHIC. One important question is to what extent the modification can be
attributed to cold nuclear matter effects. In this analysis, we carried out a
detailed mapping of the correlation patterns using high-statistics RUN8 d+Au
minimum bias data. A striking scaling behavior of the jet pair yields is
observed at low and intermediate $p_T$. The jet pair yields are found to be
enhanced relative to $N_{\rm coll}$ scaled p+p jet pair yields. The nuclear
modification factor for jet pair yields, $J_{\rm dAu}$, seems to scale with
$p_T^{\rm sum}$= $p_T^a+p_T^b$ (scaler sum), and shows a characteristic
Cronin-like enhancement at $p_T^{\rm sum}<$5-7GeV/c. Interestingly, the level
of yield modifications is similar between the near- and away-side pairs, and
the jet shapes are not modified relative to p+p collisions. The pedestal yield
under the jet peak is studied in p+p and d+Au collisions. The pedestal yield in
p+p collisions is found to be larger than PYTHIA calculations. In d+Au
collisions, it is found to exceed a simple sum of one p+p jet event and $\rm
N_{coll}-1$ minimum bias p+p events. The possible interpretation of these
results and their implications for Au+Au measurements are discussed.

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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol