High-luminosity fixed-target experiments at the LHC

Cynthia Hadjidakis (1) , S.J. Brodsky , G. Cavoto , C. da Silva , F. Donato , M.G. Echevarria , E.G. Ferreiro , I. Hřivnáčová (1) , D. Kikola , A. Klein , A. Kurepin , A. Kusina , J.P. Lansberg (1) , C. Lorcé (2) , F. Lyonnet , Y. Makdisi , L. Massacrier (1) , S. Porteboeuf (3) , C. Quintans , A. Rakotozafindrabe (4) , P. Robbe (5) , W. Scandale , I. Schienbein (6) , J. Seixas , H.S. Shao (7) , A. Signori , N. Topilskaya , B. Trzeciak , A. Uras (8) , J. Wagner , N. Yamanaka (1) , Z. Yang , A. Zelenski

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 CPHT - Centre de Physique Théorique [Palaiseau]
3 LPC - Laboratoire de Physique de Clermont
4 DPHN - Département de Physique Nucléaire (ex SPhN)
5 LAL - Laboratoire de l'Accélérateur Linéaire
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 LPTHE - Laboratoire de Physique Théorique et Hautes Energies
8 IPNL - Institut de Physique Nucléaire de Lyon

By extracting the beam with a bent crystal or by using an internal gas target, the multi-TeV proton and lead LHC beams allow one to perform the most energetic fixed-target experiments ever and to study $pp$, $p$d and $p$A collisions at $\sqrt{s_{NN}}=115$ GeV and Pb$p$ and PbA collisions at $\sqrt{s_{NN}}=72$ GeV with high precision and modern detection techniques. Such studies would address open questions in the domain of the nucleon and nucleus partonic structure at high-$x$, quark-gluon plasma and, by using longitudinally or transversally polarised targets, spin physics. In this paper, we will review the technical solutions to obtain a high-luminosity fixed-target experiment at the LHC and will discuss their possible implementations with the ALICE and LHCb detectors.

Mots clés: talk: Aix-Les-Bains 2018/10/01; p p: scattering; p nucleus: interaction; p deuteron: interaction; heavy ion: scattering; lead; quark gluon: plasma; luminosity: high; gas: target; CERN LHC Coll; polarized target; polarization: longitudinal; polarization: transverse; bent crystal; structure; ALICE; LHC-B; spin; experimental results; 72 GeV-cms/nucleon; 115 GeV-cms/nucleon

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

Cynthia Hadjidakis, S.J. Brodsky, G. Cavoto, C. da Silva, F. Donato, et al.. High-luminosity fixed-target experiments at the LHC. 9th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Oct 2018, Aix-Les-Bains, France. pp.041, ⟨10.22323/1.345.0041⟩. ⟨hal-02059212⟩