Speaker
Rafal Bielski
(AGH University of Science and Technology (PL))
Description
Lead-lead collisions at the LHC are capable of producing a system of deconfined quarks and gluons
at unprecedented energy density and temperature. Partonic-level
interactions and energy-loss mechanisms in the medium can be studied
with the aid of useful probes. One of these probes are W bosons,
which do not interact with the strongly-coupled medium and may be used
to benchmark the energy loss of quarks and gluons produced in hard
scattering events. Moreover, the W boson rapidity is directly
sensitivity to nuclear parton distribution functions (nPDFs), thereby
providing a handle on disentangling the free nucleon PDFs from nuclear
PDFs. This study reports on W production yields identified via the
electron and muon decay modes as a function of centrality and
pseudorapidity in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV with
the ATLAS detector. The measurements from both channels are found to
be consistent and were used to construct the lepton charge asymmetry.
| On behalf of collaboration: | ATLAS |
|---|
Primary author
Rafal Bielski
(AGH University of Science and Technology (PL))
