A next-generation LHC heavy-ion experiment

Abstract

The present document discusses plans for a compact, next-generation multi-purpose detector at the LHC as a follow-up to the present ALICE experiment. The aim is to build a nearly massless barrel detector consisting of truly cylindrical layers based on curved wafer-scale ultra-thin silicon sensors with MAPS technology, featuring an unprecedented low material budget of 0.05% X${}_0$ per layer, with the innermost layers possibly positioned inside the beam pipe. In addition to superior tracking and vertexing capabilities over a wide momentum range down to a few tens of MeV/$c$, the detector will provide particle identification via time-of-flight determination with about 20~ps resolution. In addition, electron and photon identification will be performed in a separate shower detector. The proposed detector is conceived for studies of pp, pA and AA collisions at luminosities a factor of 20 to 50 times higher than possible with the upgraded ALICE detector, enabling a rich physics program ranging from measurements with electromagnetic probes at ultra-low transverse momenta to precision physics in the charm and beauty sector.

arXiv commentInput to the 2020 Update of the European Particle Physics Strategy

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Cited by in corpus (13)

• The QCD phase structure at finite temperature and density
• Direct real photons in relativistic heavy ion collisions
• Global baryon number conservation encoded in net-proton fluctuations measured in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Intermediate mass dileptons as pre-equilibrium probes in heavy ion collisions
• Opportunities for new physics searches with heavy ions at colliders
• Prospects for quarkonium studies at the high-luminosity LHC
• High-energy $\pi \pi$ scattering without and with photon radiation
• An Experiment for Electron-Hadron Scattering at the LHC
• "QM19 summary talk": Outlook and future of heavy-ion collisions
• Upgrade of the ALICE experiment beyond LHC Run 3
• Bremsstrahlung photons from stopping in heavy-ion collisions
• Charm and multi-charm baryon measurements via strangeness tracking with the upgraded ALICE detector
• Spectroscopy and Radiative Decays of ${\Omega }_{ccc}$ and ${\Omega }_{bbb}$ Baryons in a Quark-Diquark Model