Physics Opportunities of a Fixed-Target Experiment using the LHC Beams

Abstract

We outline the many physics opportunities offered by a multi-purpose fixed-target experiment using the LHC proton and Pb beams extracted by a bent crystal. In a proton run with the LHC 7-TeV beam, one can analyze pp, pd and pA collisions at sqrt(s_NN)~115 GeV and even higher using the Fermi motion in a nuclear target. In a Pb run with a 2.76 TeV-per-nucleon beam, sqrt(s_NN) is as high as 72 GeV. Bent crystals can be used to extract about 5x10^8 protons/s; the integrated luminosity over a year reaches 0.5fb-1 on a typical 1 cm-long target without species limitation. Such an extraction mode does not alter the performance of the collider experiments at the LHC. By instrumenting the target-rapidity region, gluon and heavy-quark proton and neutron PDFs can be accessed at large x and even at x larger than 1 in the nuclear case. Single diffractive physics and, for the first time, the large negative-xF domain can be accessed. The nuclear target-species versatility provides a unique opportunity to study nuclear matter vs. the features of the hot and dense matter formed in heavy-ion collisions, which can be studied in PbA collisions over the full range of target-rapidity domain with a large variety of nuclei. The polarization of hydrogen and nuclear targets allows an ambitious spin program, including measurements of the QCD lensing effects which underlie the Sivers single-spin asymmetry, the study of transversity distributions and possibly of polarized PDFs. We also emphasize the potential offered by pA ultra-peripheral collisions where the nucleus target A is used as a coherent photon source, mimicking photoproduction processes in ep collisions. Finally, we note that W and Z bosons can be produced and detected in a fixed-target experiment and in their threshold domain for the first time, providing new ways to probe the partonic content of the proton and the nucleus.

14 pages, 2 figures, 5 tables. Comments are welcome

References in corpus (41)

• New parton distributions for collider physics
• Heavy quarkonium: progress, puzzles, and opportunities
• EPS09 - a New Generation of NLO and LO Nuclear Parton Distribution Functions
• The Physics of Ultraperipheral Collisions at the LHC
• J/psi Production vs Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• J/$\psi$ suppression at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Suppression of non-prompt J/psi, prompt J/psi, and Y(1S) in PbPb collisions at sqrt(sNN) = 2.76 TeV
• QCD corrections to J/psi and Upsilon production at hadron colliders
• Upsilon production at the Tevatron and the LHC
• A practical Seedless Infrared-Safe Cone jet algorithm
• Distribution Functions of the Nucleon and Pion in the Valence Region
• J/psi, psi' and Upsilon Production at Hadron Colliders: a review
• Transverse-Spin and Transverse-Momentum Effects in High-Energy Processes
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• QCD corrections to J/psi polarization of hadronproduction at Tevatron and LHC
• Hadronic Multiparticle Production at Ultra-High Energies and Extensive Air Showers
• Forward Neutral Pion Transverse Single Spin Asymmetries in p+p Collisions at \sqrt{s}=200 GeV
• The Charm Parton Content of the Nucleon
• Single Transverse Spin Asymmetries of Identified Charged Hadrons in Polarized p+p Collisions at $\sqrt{s}$ = 62.4 GeV
• Quantitative constraints on the gluon distribution function in the proton from collider isolated-photon data
• Measurement of charm production at central rapidity in proton-proton collisions at $\sqrt{s}=7$ TeV
• Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron
• J/psi Production in sqrt (s_NN)= 200 GeV Cu+Cu Collisions
• Hadroproduction of J/psi and Upsilon in association with a heavy-quark pair
• Measurement of Angular Distributions of Drell-Yan Dimuons in p + d Interaction at 800 GeV/c
• Kinematic distributions and nuclear effects of $J/\psi$ production in 920 GeV fixed-target proton-nucleus collisions
• Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
• Revisiting scaling properties of medium-induced gluon radiation
• Cross Section and Parity Violating Spin Asymmetries of W^+/- Boson Production in Polarized p+p Collisions at sqrt(s)=500 GeV
• Flavor Asymmetry of the Nucleon Sea and the Five-Quark Components of the Nucleons
• Direct Photon Production in Association With A Heavy Quark At Hadron Colliders
• Diffractive Higgs Production from Intrinsic Heavy Flavors in the Proton
• Measurement of the parity-violating longitudinal single-spin asymmetry for $W^{\pm }$ boson production in polarized proton-proton collisions at $\sqrt{s}=500$GeV
• Threshold Resummation for W-Boson Production at RHIC
• The Sivers single-spin asymmetry in photon-jet production
• Diffractive parton distributions from H1 data
• Measuring gluon shadowing with prompt photons at RHIC and LHC
• Investigating charmonium production at LHC with the p pbar final state
• Transversity and T-odd PDFs from Drell-Yan processes with $pp$, $pD$ and $DD$ collisions
• Transverse Momentum Dependent Distributions in Hadronic Collisions: p(transv. polarized) p --> D + X and p(transv. polarized) p --> gamma + X
• Proton dissociation into three jets

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