Apr 9 – 13, 2018
Beurs van Berlage
Europe/Zurich timezone

Physics with heavy ions at FCC-hh

Apr 11, 2018, 8:50 AM
20m
P3 Administratiezaal (1.1)

P3 Administratiezaal

1.1

Board: 3AMS09B
Physics FCC physics

Speaker

Andrea Dainese (INFN - Padova (IT))

Description

This presentation will review the projected accelerator performance and the physics opportunities for a heavy-ion programme at FCC-hh [1]. In addition, the status of the FCC-hh detector design studies will be discussed.

Operating FCC-hh with heavy-ion beams would provide Pb-Pb and p-Pb collisions at center of mass energy of 39 and 63 TeV per NN pair, respectively. Current estimates indicate that a luminosity of about 30/nb could be integrated during a one-month Pb-Pb run, that is more than one order of magnitude above the maximum projections for the LHC. The FCC-hh beams could also be used for fixed-target collisions, either with beam extraction or gaseous target.

The Quark-Gluon Plasma state produced in Pb-Pb collisions at 39 TeV is expected to have initial temperature and energy density substantially larger than at LHC energy, a stronger flow field and freeze-out volume twice as large. The larger temperature could entail novel features, like e.g. abundant in-medium production of charm quarks. The latter could determine an increase in the number of degrees of freedom of the QGP and provide a new tool to study its temperature evolution. New, rarer, hard probes would be available, like boosted top quarks, which could give access to the time-evolution of the medium opacity.

The physics of high gluon densities at small Bjorken-x and the onset of saturation can be studied using pA, AA, and gamma-A collisions. The FCC-hh will provide access to the region down to x<10−6 with perturbative probes like heavy quarks and quarkonia and to the region of high Q2 down to x∼10−4 with W, Z and top. High-energy photon-photon interactions in ultraperipheral AA collisions will also enable the study of very rare processes such as light-by-light scattering and gamma-gamma to W+W−.

[1] A. Dainese et al., Heavy ions at the Future Circular Collider, arXiv:1605.01389

Primary author

Andrea Dainese (INFN - Padova (IT))

Co-authors

Liliana Apolinario (Universidade de Lisboa (PT)) Nestor Armesto Perez (Universidade de Santiago de Compostela (ES)) David d'Enterria (CERN) John Jowett (CERN) Jean-Philippe Lansberg (IPN Orsay, Paris Sud U. / IN2P3-CNRS) Silvia Masciocchi (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE)) Dr Guilherme Milhano (LIP-Lisbon & CERN TH) Carlos Albert Salgado Lopez (Universidade de Santiago de Compostela (ES)) Michaela Schaumann (CERN) Marco Van Leeuwen (Nikhef National institute for subatomic physics (NL)) Urs Wiedemann (CERN)

Presentation materials