118968511
A first book of quantum field theory
Preface to the Second Edition / Preface to the First Edition / Preliminaries / Classical Field Theory / Quantization of scalar fields / Quantization of Dirac Fields / The S-matrix expansion / From Wick expansion to Feynman diagrams / Cross sections and decay rates / Quantization of the electromagnetic field / Quantum electrodynamics / P, T, C and their Combinations / Electromagnetic form factors / Renormalization / Symmetries and symmetry breaking / Yang-Mills theory of non-Abelian gauge fields / Standard electroweak theory / Useful Formulas / Answers to Selected Exercises / Index
1061278
Parallel Transport over Path Spaces
We develop a differential geometric framework for parallel transport over path spaces and a corresponding discrete theory, an integrated version of the continuum theory, using a category-theoretic framework.
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Generalized vector field
We define generalized vector fields, and contraction and Lie derivatives with respect to them. Generalized commutators are also defined.
14702223
Axionic black holes from massive axions
Abstract A black hole may carry axionic charge in a theory which has gravity coupled to a massless two-form Kalb-Ramond field. We show that this effect persists if the axion has a topological mass term coupling the Kalb-Ramond potential to a U(1) gauge field. Such mass terms arise in the low-energy effective theory of the string.
119451761
A nilpotent symmetry of quantum gauge theories
For the Becchi-Rouet-Stora-Tyutin invariant extended action for any gauge theory, there exists another off-shell nilpotent symmetry. For linear gauges, it can be elevated to a symmetry of the quantum theory and used in the construction of the quantum effective action. Generalizations for nonlinear gauges and actions with higher-order ghost terms are also possible.
59315
NEGATIVE FORMS AND PATH SPACE FORMS
We present an account of negative differential forms within a natural algebraic framework of differential graded algebras, and explain their relationship with forms on path spaces.
117770423
Shear viscosity due to Landau damping from the quark-pion interaction
We have calculated the shear viscosity coefficient $\ensuremath{\eta}$ of the strongly interacting matter in the relaxation time approximation, where a quasiparticle description of quarks with their dynamical masses is considered from the Nambu-Jona-Lasinio model. Due to the thermodynamic scattering of quarks with pseudoscalar-type condensate (i.e., pion), a nonzero Landau damping will be acquired by the propagating quarks. This Landau damping may be obtained from the Landau cut contribution of the in-medium self-energy of a quark-pion loop, which is evaluated in the framework of real-time thermal field theory.
116271100
Correlation between conserved charges in PNJL Model with multi-quark interactions
We present a study of correlations among conserved charges like baryon number, electric charge and strangeness in the framework of 2+1 flavor Polyakov loop extended Nambu-Jona-Lasinio model at vanishing chemical potentials, up to fourth order. Correlations up to second order have been measured in Lattice QCD which compares well with our estimates given the inherent difference in the pion masses in the two systems. Possible physical implications of these correlations and their importance in understanding the matter obtained in heavy-ion collisions are discussed. We also present comparison of the results with the commonly used unbound effective potential in the quark sector of this model.