Azimuthal asymmetries in lepton-pair production at a fixed-target experiment using the LHC beams (AFTER)

Abstract

A multi-purpose fixed-target experiment using the proton and lead-ion beams of the LHC was recently proposed by Brodsky, Fleuret, Hadjidakis and Lansberg, and here we concentrate our study on some issues related to the spin physics part of this project (referred to as AFTER). We study the nucleon spin structure through $pp$ and $pd$ processes with a fixed-target experiment using the LHC proton beams, for the kinematical region with 7 TeV proton beams at the energy in center-of-mass frame of two nucleons $\sqrt{s}=115$ GeV. We calculate and estimate the $\cos 2\varphi$ azimuthal asymmetries of unpolarized $pp$ and $pd$ dilepton production processes in the Drell--Yan continuum region and at the $Z$-pole. We also calculate the $\sin (2\varphi -{\varphi }_S)$, $\sin (2\varphi +{\varphi }_S)$ and $\sin 2\varphi$ azimuthal asymmetries of $pp$ and $pd$ dilepton production processes with the target proton and deuteron longitudinally or transversally polarized in the Drell--Yan continuum region and around $Z$ resonances region. We conclude that it is feasible to measure these azimuthal asymmetries, consequently the three-dimensional or transverse momentum dependent parton distribution functions (3dPDFs or TMDs), at this new AFTER facility.

15 pages, 40 figures. Version accepted for publication in EPJC

References in corpus (27)

• Transverse-momentum distributions in a diquark spectator model
• Sivers Effect for Pion and Kaon Production in Semi-Inclusive Deep Inelastic Scattering
• k_T factorization is violated in production of high-transverse-momentum particles in hadron-hadron collisions
• Transverse-Spin and Transverse-Momentum Effects in High-Energy Processes
• Azimuthal and Single Spin Asymmetries in Hard Scattering Processes
• Dilepton production from polarized hadron hadron collisions
• Transverse spin structure of the nucleon from lattice QCD simulations
• The transverse momentum dependent distribution functions in the bag model
• Measurement of Angular Distributions of Drell-Yan Dimuons in p + d Interaction at 800 GeV/c
• Azimuthal spin asymmetries in light-cone constituent quark models
• Pretzelosity $h_{1T}^{\perp }$ and quark orbital angular momentum
• Non-universality of transverse momentum dependent parton distribution functions
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Are all Boer-Mulders functions alike?
• Heavy Quarkonium Production in Single Transverse Polarized High Energy Scattering
• Hadronic Dijet Imbalance and Transverse-Momentum Dependent Parton Distributions
• Measurement of Angular Distributions of Drell-Yan Dimuons in $p+p$ Interactions at 800 GeV/c
• Drell-Yan processes, transversity and light-cone wavefunctions
• Extracting Boer-Mulders functions from $p+D$ Drell-Yan processes
• Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks
• Transverse momentum dependence of the angular distribution of the Drell-Yan process
• Angular distribution of leptons from the decay of massive vector bosons
• Proposal for measuring new transverse momentum dependent parton distributions $g_{1T}$ and $h_{1L}^{\perp }$ through semi-inclusive deep inelastic scattering
• Flavor separation of the Boer-Mulders function from unpolarized ${\pi }^{-}p$ and ${\pi }^{-}D$ Drell-Yan processes
• The cos 2 phi asymmetry of Drell-Yan and J/psi production in unpolarized ppbar scattering
• $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS
• Transverse spin effects of sea quarks in unpolarized nucleons