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In this work we address three issues associated with orbital angular momentum relevant for leading twist polarized deep inelastic scattering. We consider internal orbital helicity of a composite system in an arbitrary reference frame and contrast the results in the non-relativistic situation versus the light-front (relativistic) case. We introduce quark and… (More)

The Fourier transform of the deeply virtual Compton scattering amplitude (DVCS) with respect to the skewness parameter ζ = Q2/2p · q can be used to provide an image of the target hadron in the boost-invariant variable σ, the coordinate conjugate to light-front time τ = t+ z/c. As an illustration, we construct a consistent covariant model of the DVCS… (More)

We investigate the feasibility of analyzing deep inelastic structure functions in Hamiltonian formalism by combining the light-front BJL limit of high energy amplitudes and the Fock space (multi-parton) description of hadrons. This study is motivated by some of the theoretical questions emerging from the ongoing nonperturbative/perturbative studies in… (More)

We address the long standing problem of the construction of relativistic spin operators for a composite system in QCD. Exploiting the kinematical boost symmetry in light front theory, we show that transverse spin operators for massless particles can be introduced in an arbitrary reference frame, in analogy with those for massive particles. In light front… (More)

Issues related with microcausality violation and continuum limit in the context of (1+1) dimensional scalar field theory in discretized light-cone quantization (DLCQ) are addressed in parallel with discretized equal time quantization (DETQ) and the fact that Lorentz invariance and microcausality are restored if one can take the continuum limit properly is… (More)

- Abhishek Chowdhury, Asit K. De, +4 authors Anwesa Sarkar
- Computer Physics Communications
- 2013

In this paper we address various issues connected with transverse spin in light front QCD. The transverse spin operators, in A+ = 0 gauge, expressed in terms of the dynamical variables are explicitly interaction dependent unlike the helicity operator which is interaction independent in the topologically trivial sector of light-front QCD. Although it cannot… (More)

We address problems associated with compactification near and on the light front. In perturbative scalar field theory we illustrate and clarify the relationships among three approaches: (1) quantization on a space-like surface close to a light front; (2) infinite momentum frame calculations; and (3) quantization on the light front. Our examples emphasize… (More)

- James P. Vary, Pieter Maris, +5 authors G. F. de Teramond
- 2009

Recent advances in ab initio quantum many-body methods and growth in computer power now enable highly precise calculations of nuclear structure. The precision has attained a level sufficient to make clear statements on the nature of 3-body forces in nuclear physics. Total binding energies, spin-dependent structure effects, and electroweak properties of… (More)

In this paper we address various issues connected with transverse spin in light front QCD. The transverse spin operators, in A+ = 0 gauge, expressed in terms of the dynamical variables are explicitly interaction dependent unlike the helicity operator which is interaction independent in the topologically trivial sector of light-front QCD. In analogy with the… (More)