The gluon and charm content of the deuteron

Abstract

We evaluate the frame-independent gluon and charm parton-distribution functions (PDFs) of the deuteron utilizing light-front quantization and the impulse approximation. We use a nuclear wave function obtained from solving the nonrelativistic Schrödinger equation with the realistic Argonne v18 nuclear force, which we fold with the proton PDF. The predicted gluon distribution in the deuteron (per nucleon) is a few percent smaller than that of the proton in the domain x b j = Q 2 2p N ·q ∼ 0.4, whereas it is strongly enhanced for x b j larger than 0.6. We discuss the applicability of our analysis and comment on how to extend it to the kinematic limit x b j → 2. We also analyze the charm distribution of the deuteron within the same approach by considering both the perturbatively and non-perturbatively generated (intrinsic) charm contributions. In particular, we note that the intrinsic-charm content in the deuteron will be enhanced due to 6-quark "hidden-color" QCD configurations.

Studies of various physics effects on an on-axis LHCD experiment using numerical tools

“…On the other hand, it is an appealing playground to test our understanding of the dynamics of simple nucleon-bound system and hidden colour configurations of six quarks (see e.g. [9]).…”

“…where i A i is the sum of the atomic masses of the target constituents (for instance 1 for H, 3 for 3 He and 17 for NH 3 ) 9 . Indeed the luminosity L does not account for the number of nucleons per atom or molecule in the target.…”

A fixed-target programme at the LHC for heavy-ion, hadron, spin and astroparticle physics: AFTER@LHC

“…Such studies should however go along with dedicated studies of the so-called intrinsic charm content [13], energy loss and/or nuclear absorption effects. Along the same lines it is possible to study the gluon and charm content of the deuteron [14]. Regarding the AA collisions, the feasibility studies done so far [5,4,3] show that nuclear modification factor R AA for J/ψ, ψ(2S ), Υ(nS ) and D 0 will be measured with a percent-level precision.…”

A fixed-target programme at the LHC: Physics case and projected performances for heavy-ion, hadron, spin and astroparticle studies

“…On the other hand, it is an appealing playground to test our understanding of the dynamics of simple nucleon-bound systems and hidden colour configurations of six quarks (see e.g. [12]).…”