Study of Isolated-Photon + Jet Correlations in PbPb and pp Collisions at $\sqrt{s_{NN}} = 5.02\:\mathrm{TeV}$

Study of Isolated-Photon + Jet Correlations in PbPb and pp Collisions at $\sqrt{s_{NN}} = 5.02\:\mathrm{TeV}$

CMS

Collaboration

2016

18 pages

Report number:

CMS-PAS-HIN-16-002

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

pdf

reference search11 citations

Citations per year

Abstract:

Measurements of correlations in isolated-photon and jet pairs in pp and PbPb collisions at

\sqrt{s_{NN}} = 5.02~\mathrm{TeV}

are reported. Jets are reconstructed with an anti-

k_\mathrm{T}

clustering algorithm with a distance parameter of 0.3. For events containing a leading isolated photon with transverse momentum

p_\mathrm{T}^\gamma > 40~\mathrm{GeV}/c

and an associated jet with

p_\mathrm{T}^\mathrm{Jet} > 30~\mathrm{GeV}/c

, the photon + jet transverse momentum balance in PbPb collisions is studied as a function of collision centrality and

p_\mathrm{T}^\gamma

. The results are compared to pp reference data collected at the same collision energy. A significant decrease in the ratio

p_\mathrm{T}^\mathrm{Jet}/p_\mathrm{T}^\gamma

relative to that in the pp reference is observed.

Note:

Preliminary results

Data
heavy ion: scattering
lead
p p: scattering
p p: colliding beams
photon: associated production
jet: pair production
jet: transverse momentum
photon: transverse momentum
jet: correlation

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Study of Isolated-Photon + Jet Correlations in PbPb and pp Collisions at sNN=5.02 TeV\sqrt{s_{NN}} = 5.02\:\mathrm{TeV}sNN​​=5.02TeV

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Study of Isolated-Photon + Jet Correlations in PbPb and pp Collisions at $\sqrt{s_{NN}} = 5.02\:\mathrm{TeV}$