Fourth-order self-energy of a neutron star due to massive neutrino exchange

2001 ◽  
Vol 63 (6) ◽  
Author(s):  
Brian Woodahl ◽  
Ephraim Fischbach
Keyword(s):  
Neutron Star ◽  
Fourth Order ◽  
Massive Neutrino ◽  
Self Energy

scholarly journals Nuclear fourth-order symmetry energy and its effects on neutron star properties in the relativistic Hartree-Fock theory

2018 ◽  
Vol 97 (2) ◽  
Author(s):  
Zhi Wei Liu ◽  
Zhuang Qian ◽  
Ruo Yu Xing ◽  
Jia Rui Niu ◽  
Bao Yuan Sun
Keyword(s):  
Neutron Star ◽  
Fourth Order ◽  
Symmetry Energy ◽  
Hartree Fock

Fourth-order self-energy contribution to the Lamb shift

1998 ◽  
Vol 57 (3) ◽  
pp. 1548-1564 ◽  
Author(s):  
S. Mallampalli ◽  
J. Sapirstein
Keyword(s):  
Fourth Order ◽  
Lamb Shift ◽  
Energy Contribution ◽  
Self Energy

On the propagation functions of quantum electrodynamics

1954 ◽  
Vol 225 (1163) ◽  
pp. 535-548 ◽  
Keyword(s):  
Power Series ◽  
Series Expansion ◽  
Fourth Order ◽  
Quantum Electrodynamics ◽  
Power Series Expansion ◽  
Vertex Part ◽  
Self Energy ◽  
One To One ◽  
Renormalization Constants

Schwinger’s equations for the propagation functions of quantum electrodynamics are redefined in a way to give the finite (renormalized) propagation functions without reference to divergent integrals or infinite renormalization constants. This is achieved by incorporating in the equations themselves a limiting process which is an extension of that introduced by Dirac and Heisenberg. The formulation is given independently of the power-series expansion, but the cancellation of singularities is established only in terms of such an expansion. The method is illustrated first by considering the lowest-order approximations. The lowestorder electron self-energy and vertex-part expressions are worked out, and the compensation of the singularities corresponding to the ‘ b ’ divergences is indicated in the fourth order. In the power-series expansion, the prescriptions are in a one-to-one correspondence to those of Dyson. Their formulation independently of this expansion sums up the rules obtained in the different approximations.

Children’s Recall of Approximations to English

1973 ◽  
Vol 16 (2) ◽  
pp. 201-212 ◽  
Author(s):  
Elizabeth Carrow ◽  
Michael Mauldin
Keyword(s):  
Language Development ◽  
Fourth Order ◽  
Third Order ◽  
Memory Processes ◽  
The Third ◽  
General Index ◽  
General Linguistic

As a general index of language development, the recall of first through fourth order approximations to English was examined in four, five, six, and seven year olds and adults. Data suggested that recall improved with age, and increases in approximation to English were accompanied by increases in recall for six and seven year olds and adults. Recall improved for four and five year olds through the third order but declined at the fourth. The latter finding was attributed to deficits in semantic structures and memory processes in four and five year olds. The former finding was interpreted as an index of the development of general linguistic processes.

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