Future physics opportunities for high-density QCD at the LHC with heavy-ion and proton beams

Z. Citron , A. Dainese , J.F. Grosse-Oetringhaus , J.M. Jowett , Y.-J. Lee , U.A. Wiedemann , M. Winn (1, 2) , A. Andronic , F. Bellini , E. Bruna , E. Chapon , H. Dembinski , D. d'Enterria , I. Grabowska-Bold , G.M. Innocenti , C. Loizides , S. Mohapatra , C.A. Salgado , M. Verweij , M. Weber , Joerg Aichelin (3) , A. Angerami , L. Apolinario , F. Arleo (4) , N. Armesto , R. Arnaldi , M. Arslandok , P. Azzi , R. Bailhache , S.A. Bass , C. Bedda , N.K. Behera , R. Bellwied , A. Beraudo , R. Bi , C. Bierlich , K. Blum , A. Borissov , P. Braun-Munzinger , R. Bruce , G.E. Bruno , S. Bufalino , J. Castillo Castellanos (5) , R. Chatterjee , Y. Chen , Z. Chen , C. Cheshkov (6) , T. Chujo , Z. Conesa del Valle (7) , J.G. Contreras Nuno , L. Cunqueiro Mendez , T. Dahms , N.P. Dang , H. de La Torre , A.F. Dobrin , B. Doenigus , L. van Doremalen , X. Du , A. Dubla , M. Dumancic , M. Dyndal , L. Fabbietti , E.G. Ferreiro , F. Fionda , F. Fleuret (4) , S. Floerchinger , G. Giacalone (8) , A. Giammanco , Pol-Bernard Gossiaux (3) , G. Graziani , V. Greco , A. Grelli , F. Grosa , Maxime Guilbaud , T. Gunji , V. Guzey , C. Hadjidakis (7) , S. Hassani (9) , M. He , I. Helenius , P. Huo , P.M. Jacobs , P. Janus , M.A. Jebramcik , J. Jia , A.P. Kalweit , H. Kim , M. Klasen , S.R. Klein , M. Klusek-Gawenda , J. Kremer , G.K. Krintiras , F. Krizek , E. Kryshen , A. Kurkela , A. Kusina , J.-P. Lansberg (7) , R. Lea , M. van Leeuwen , W. Li , J. Margutti , A. Marin , C. Marquet (10) , J. Martin Blanco (4) , L. Massacrier (7) , A. Mastroserio , E. Maurice (4) , C. Mayer , C. Mcginn , G. Milhano , A. Milov , V. Minissale , C. Mironov , A. Mischke , N. Mohammadi , M. Mulders , M. Murray , M. Narain , P. Di Nezza , A. Nisati , J. Noronha-Hostler , A. Ohlson , V. Okorokov , F. Olness , P. Paakkinen , L. Pappalardo , J. Park , H. Paukkunen , C.C. Peng , H. Pereira da Costa (5) , D.V. Perepelitsa , D. Peresunko , M. Peters , N.E. Pettersson , S. Piano , T. Pierog , J. Pires , M. Płoskoń , S. Plumari , F. Prino , M. Puccio , R. Rapp , K. Redlich , K. Reygers , C.L. Ristea , P. Robbe (2) , A. Rossi , A. Rustamov , M. Rybar , M. Schaumann , B. Schenke , I. Schienbein (11) , L. Schoeffel (9) , I. Selyuzhenkov , A.M. Sickles , M. Sievert , P. Silva , T. Song , M. Spousta , J. Stachel , P. Steinberg , Diego Stocco (3) , M. Strickland , M. Strikman , J. Sun , D. Tapia Takaki , K. Tatar , C. Terrevoli , A. Timmins , S. Trogolo , B. Trzeciak , A. Trzupek , R. Ulrich , A. Uras (6) , R. Venugopalan , I. Vitev , G. Vujanovic , J. Wang , T.W. Wang , R. Xiao , Y. Xu , C. Zampolli , H. Zanoli , M. Zhou , Y. Zhou

1 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
2 LAL - Laboratoire de l'Accélérateur Linéaire
3 SUBATECH - Laboratoire de physique subatomique et des technologies associées
4 LLR - Laboratoire Leprince-Ringuet
5 DPHN - Département de Physique Nucléaire (ex SPhN)
6 IPNL - Institut de Physique Nucléaire de Lyon
7 IPNO - Institut de Physique Nucléaire d'Orsay
8 IPHT - Institut de Physique Théorique - UMR CNRS 3681
9 DPhP - Département de Physique des Particules (ex SPP)
10 CPHT - Centre de Physique Théorique [Palaiseau]
11 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

The future opportunities for high-density QCD studies with ion and proton beams at the LHC are presented. Four major scientific goals are identified: the characterisation of the macroscopic long wavelength Quark-Gluon Plasma (QGP) properties with unprecedented precision, the investigation of the microscopic parton dynamics underlying QGP properties, the development of a unified picture of particle production and QCD dynamics from small (pp) to large (nucleus--nucleus) systems, the exploration of parton densities in nuclei in a broad ($x$, $Q^2$) kinematic range and the search for the possible onset of parton saturation. In order to address these scientific goals, high-luminosity Pb-Pb and p-Pb programmes are considered as priorities for Runs 3 and 4, complemented by high-multiplicity studies in pp collisions and a short run with oxygen ions. High-luminosity runs with intermediate-mass nuclei, for example Ar or Kr, are considered as an appealing case for extending the heavy-ion programme at the LHC beyond Run 4. The potential of the High-Energy LHC to probe QCD matter with newly-available observables, at twice larger center-of-mass energies than the LHC, is investigated.

Mots clés: parton: saturation; quantum chromodynamics: matter; p: beam; nucleus; interpretation of experiments: CERN LHC Coll; p p: scattering; heavy ion; kinematics; quark gluon: plasma; oxygen: ion; parton: density

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]; Physique des Hautes Energies - Expérience [hep-ex]; Physique Nucléaire Expérimentale [nucl-ex]; Physique Nucléaire Théorique [nucl-th]

Z. Citron, A. Dainese, J.F. Grosse-Oetringhaus, J.M. Jowett, Y.-J. Lee, et al.. Future physics opportunities for high-density QCD at the LHC with heavy-ion and proton beams. HL/HE-LHC Workshop, Jun 2018, Geneva, Switzerland. ⟨hal-01974840⟩