|dc.description.abstract||In this thesis we study the transverse structure of reconstructed jets via transverse
fragmentation momentum, jT, distributions in proton-lead (p–Pb) collisions at
the centre-of-mass energy per nucleon of 5.02 TeV. The data is measured with the
ALICE experiment at the CERN LHC.
In previous analysis that used two-particle correlations, it has been observed
that the measured jT distributions can be factorised into two components, a narrow
Gaussian component, and a wide non-Gaussian component. It was argued that
these components can be linked to the non-perturbative hadronisation and to the
perturbative showering process, respectively. We have observed the same factorisation
holds for jT distributions obtained using reconstructed jets. Furthermore
although a direct quantitative comparison is not possible, our data is qualitatively
compatible with jT distributions measured from two-particle correlations.
Studies of collective flow in high multiplicity p–Pb collisions have seen hints
of behaviour that in Pb–Pb collisions has been taken as indication of the creation
of Quark Gluon Plasma (QGP), a deconfined state of QCD matter. However
studies of jet observables have shown no modification in high multiplicity p–Pb
collisions. As expected it has been observed in Pb–Pb collisions that jets traversing
through QGP medium will lose energy from interactions with the medium. Thus
it remains an open question whether QGP is created in a p–Pb collision. In this
thesis we compare measured jT distributions between minimum bias and high
multiplicity p–Pb collisions. Our results show no sign of modification within the
current experimental capabilities.
Keywords: jet, jet shape, jet fragmentation, jet reconstruction, heavy ion, p–Pb,
transverse momentum, ALICE, CERN, LHC||en