High-mass dimuon resonances in Pb-Pb collisions at 5.5 TeV in CMS

TL;DR

This paper discusses CMS detector capabilities to study high-mass dimuon resonances like quarkonia and Z bosons in Pb-Pb collisions at 5.5 TeV, providing insights into QCD matter and nuclear parton distributions.

Contribution

It evaluates the potential of CMS to measure quarkonium and Z boson production in heavy-ion collisions at LHC energies.

Findings

CMS can detect and analyze dimuon resonances in Pb-Pb collisions.

Study provides baseline for understanding quark-gluon plasma effects.

First assessment of Z^0 boson production in heavy-ion collisions at LHC.

Abstract

The measurement of the charmonium ($J/\psi$, $\psi'$) and bottomonium ($\Upsilon$, $\Upsilon'$, ${\Upsilon''}$) resonances and $Z^0$ boson in nucleus-nucleus collisions provides crucial information on high density QCD matter. The observation of anomalous suppression of $J/\psi$ at the CERN-SPS and RHIC is well established but the clarification of some important questions requires equivalent studies of the $\Upsilon$ family, only possible at LHC energies. The $Z^0$ boson will be produced for the first time in heavy-ion collisions at the LHC and, since its dominant production channel is through $q{\bar q}$ fusion, it is an excellent probe of the nuclear modification of quark distribution functions. This paper reports the capabilities of the CMS detector to study quarkonium and $Z^0$ production in Pb-Pb collisions at 5.5 TeV, through the dimuon decay channel.