Abstract

A new heavy-ion experiment on fixed target, NA60+, has been proposed at the CERN SPS for data taking in the next years. Its main goals will be focused on precision studies of thermal dimuons, heavy quark and strangeness production in Pb-Pb collisions at center-of-mass energies ranging from 5 to 17 GeV, which will provide a unique opportunity to investigate the region of the QCD phase diagram at high baryochemical potential (μB ~ 200 – 400 MeV). The key points of the NA60+ very broad and ambitious physics program will be described.

Highlights

  • The NA60+ experiment has been proposed [1] to study hard and electromagnetic probes in this μB region

  • The detector concept of NA60+ inherits the design from its predecessor NA60, and is based on a muon spectrometer coupled with a vertex telescope

  • The width of the front absorber, as well as the position of the tracking stations will be changed depending on the beam energy, such that the detector keeps a good acceptance around midrapidity

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Summary

Introduction

The NA60+ experiment has been proposed [1] to study hard and electromagnetic probes in this μB region. Hard probes may bring information on the onset of deconfinement via the measurement of J/ψ suppression as a function of the CM energy, while open charm states would allow to determine the transport properties of the Quark-Gluon Plasma (QGP) at large values of μB. Insight on the temperature of the system via the measurement of the thermal dimuon mass spectrum, on chiral symmetry restoration effects and on the order of the phase transition [2, 3].

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