scholarly journals The role of the pion cloud in the interpretation of the valence light-cone wavefunction of the nucleon

1997 ◽  
Vol 357 (1) ◽  
pp. 85-93 ◽  
Author(s):  
S. D. Bass ◽  
D. Schütte
Keyword(s):  
Light Cone ◽  
Pion Cloud

scholarly journals THE SPIN STRUCTURE OF THE NUCLEON IN LIGHT-CONE QUARK MODELS

2009 ◽  
Vol 24 (35n37) ◽  
pp. 2903-2912 ◽  
Author(s):  
B. PASQUINI ◽  
S. BOFFI ◽  
P. SCHWEITZER
Keyword(s):  
Transverse Momentum ◽  
Light Cone ◽  
Parton Distributions ◽  
Transverse Momentum Dependent ◽  
Spin Asymmetries ◽  
Generalized Parton Distributions ◽  
Quark Spin ◽  
Quark Models ◽  
Impact Parameter Space

The quark spin densities related to generalized parton distributions in impact-parameter space and to transverse-momentum dependent parton distributions are reviewed within a light-cone quark model, with focus on the role of the different spin-spin and spin-orbit correlations of quarks. Results for azimuthal spin asymmetries in semi-inclusive deep inelastic scattering due to T -even transverse-momentum dependent parton distributions are also discussed.

scholarly journals Role of zero modes in the canonical quantization of heavy-fermion QED in light-cone coordinates

1993 ◽  
Vol 48 (12) ◽  
pp. 5873-5882 ◽  
Author(s):  
Robert W. Brown ◽  
Jin Woo Jun ◽  
Shmaryu M. Shvartsman ◽  
Cyrus C. Taylor
Keyword(s):  
Light Cone ◽  
Heavy Fermion ◽  
Canonical Quantization ◽  
Zero Modes

CALCULATING SPIN-DEPENDENT PARTON DISTRIBUTIONS IN THE BAG MODEL

2003 ◽  
Vol 18 (08) ◽  
pp. 1391-1395 ◽  
Author(s):  
A. I. SIGNAL
Keyword(s):  
Experimental Data ◽  
Nuclear Physics ◽  
Lower Energy ◽  
Valence Quark ◽  
High Energy ◽  
Nucleon Structure ◽  
Pion Cloud ◽  
Model Calculations ◽  
Parton Distributions

Model calculations of parton distributions are an important way to connect our knowledge of physics at high energy scales with physics at lower energy scales typical of nuclear physics. Earlier work on the spin-independent valence quark distributions has shown that DIS data support a bag radius around 0.8 fm, and highlighted the importance of chiral symmetry and the role of the pion cloud in nucleon structure. Here, that work is extended to the spin-dependent parton distributions. We calculate these distributions in the model and compare with experimental data.

scholarly journals Role of diquark correlations and the pion cloud in nucleon elastic form factors

2014 ◽  
Vol 90 (4) ◽  
Author(s):  
Ian C. Cloët ◽  
Wolfgang Bentz ◽  
Anthony W. Thomas
Keyword(s):  
Form Factors ◽  
Pion Cloud ◽  
Elastic Form

Regularization and noncovariant gauges

1986 ◽  
Vol 64 (5) ◽  
pp. 606-610 ◽  
Author(s):  
George Leibbrandt
Keyword(s):  
Light Cone ◽  
Stochastic Quantization ◽  
Technical Aspects ◽  
Light Cone Gauge ◽  
Advantages And Disadvantages

We examine the advantages and disadvantages of noncovariant gauges, with special emphasis on the light-cone gauge. We describe the correct iε prescription in this gauge and discuss a number of other technical aspects. The role of the light-cone gauge in connection with Nicolai maps and stochastic quantization is also examined.

Role of the intrinsic charm content of the nucleon from various light-cone models on γ +c-jet production

2016 ◽  
Vol 40 (12) ◽  
pp. 123104 ◽  
Author(s):  
S. Rostami ◽  
Muhammad Goharipour ◽  
Alireza Aleedaneshvar
Keyword(s):  
Light Cone ◽  
Jet Production ◽  
Intrinsic Charm

scholarly journals The role of the pion cloud in electroproduction of the Δ(1232)

1996 ◽  
Vol 373 (1-3) ◽  
pp. 229-234 ◽  
Author(s):  
M. Fiolhais ◽  
B. Golli ◽  
S. Širca
Keyword(s):  
Pion Cloud

RECENT ADVANCES IN SUPERSTRING PERTURBATION THEORY

1990 ◽  
Vol 05 (06) ◽  
pp. 367-380 ◽  
Author(s):  
ERIC D'HOKER
Keyword(s):  
Perturbation Theory ◽  
String Theory ◽  
Quantum Gravity ◽  
Light Cone ◽  
Lorentz Invariance ◽  
Covariant Approach ◽  
Recent Advances ◽  
Made In

Recent advances made in the understading of the Ramond-Neveu-Schwarz formulation of superstring perturbation theory are reviewed. The role of chiral splitting, in terms of which a consistent GSO projected formula is obtained to all loop orders, is explained. Equivalence of the manifestly convariant Polyakov amplitudes with the manifestly unitary light-cone amplitudes is shown, thus establishing unitarity of the covariant approach and Lorentz invariance of the light-cone approach. Some implications for string theory and quantum gravity are pointed out.

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