THE EMC EFFECT IN A NUCLEONIC DESCRIPTION

1991 ◽  
Vol 06 (01) ◽  
pp. 21-28 ◽  
Author(s):  
BO-QIANG MA
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Structure Function ◽  
Shell Structure ◽  
Impulse Approximation ◽  
Baryon Number ◽  
Quantum Field ◽  
Natural Assumption ◽  
Nucleus Scattering ◽  
Baryon Number Conservation

Deep inelastic lepton-nucleus scattering is treated by considering the nucleus as a bound system of nucleons based on the light-cone quantum field theory. This method has the advantages that the impulse approximation is justified and that baryon number conservation is guaranteed. However, the ambiguities in identifying the structure function for bound nucleons in the conventional nucleonic approach seem not to have been avoided. It is also shown that a consistent calculation gives an unreasonably large Q2 dependence in the calculated nuclear structure function if one makes the most natural assumption to identify the off-"energy"-shell structure function for bound nucleons.

scholarly journals The parton model and its applications

2014 ◽  
Vol 29 (30) ◽  
pp. 1430071
Author(s):  
Tung-Mow Yan ◽  
Sidney D. Drell
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Impulse Approximation ◽  
Parton Model ◽  
High Energy ◽  
Scaling Behavior ◽  
Inelastic Electron ◽  
Quantum Field ◽  
Crossing Symmetry ◽  
Deep Inelastic Electron

This is a review of the program we started in 1968 to understand and generalize Bjorken scaling and Feynman's parton model in a canonical quantum field theory. It is shown that the parton model proposed for deep inelastic electron scatterings can be derived if a transverse momentum cutoff is imposed on all particles in the theory so that the impulse approximation holds. The deep inelastic electron–positron annihilation into a nucleon plus anything else is related by the crossing symmetry of quantum field theory to the deep inelastic electron–nucleon scattering. We have investigated the implication of crossing symmetry and found that the structure functions satisfy a scaling behavior analogous to the Bjorken limit for deep inelastic electron scattering. We then find that massive lepton pair production in collisions of two high energy hadrons can be treated by the parton model with an interesting scaling behavior for the differential cross-sections. This turns out to be the first example of a class of hard processes involving two initial hadrons.

A Review of Conformal Field Theory in 2D

2014 ◽  
Vol 6 (2) ◽  
pp. 1079-1105
Author(s):  
Rahul Nigam
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Conformal Field Theory ◽  
Statistical Mechanics ◽  
Critical Behavior ◽  
Verma Module ◽  
Virasoro Algebra ◽  
Quantum Field ◽  
Conformal Field ◽  
Insight Into

In this review we study the elementary structure of Conformal Field Theory in which is a recipe for further studies of critical behavior of various systems in statistical mechanics and quantum field theory. We briefly review CFT in dimensions which plays a prominent role for example in the well-known duality AdS/CFT in string theory where the CFT lives on the AdS boundary. We also describe the mapping of the theory from the cylinder to a complex plane which will help us gain an insight into the process of radial quantization and radial ordering. Finally we will develop the representation of the Virasoro algebra which is the well-known "Verma module".  

Some remarks on a deformed quantum field theory

2002 ◽  
Author(s):  
Marco Aurelio Do Rego Monteiro ◽  
V. B. Bezerra ◽  
E. M.F. Curado
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Quantum Field

Quantum mechanics

2018 ◽  
Author(s):  
Michael Kachelriess
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Quantum Mechanics ◽  
Relativistic Quantum ◽  
Transition Amplitude ◽  
External Source ◽  
Quantum Field ◽  
Damping Term ◽  
Relativistic Quantum Theory ◽  
Generating Functional

After a brief review of the operator approach to quantum mechanics, Feynmans path integral, which expresses a transition amplitude as a sum over all paths, is derived. Adding a linear coupling to an external source J and a damping term to the Lagrangian, the ground-state persistence amplitude is obtained. This quantity serves as the generating functional Z[J] for n-point Green functions which are the main target when studying quantum field theory. Then the harmonic oscillator as an example for a one-dimensional quantum field theory is discussed and the reason why a relativistic quantum theory should be based on quantum fields is explained.

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