scholarly journals Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles

2014 ◽  
Vol 2014 (9) ◽  
Author(s):  
Stephen G. Naculich
Keyword(s):  
Massive Scalar ◽  
Scalar Particles

scholarly journals Massive scalar particles in a modified Schwarzschild geometry

2000 ◽  
Vol 268 (4-6) ◽  
pp. 247-254 ◽  
Author(s):  
S Capozziello ◽  
A Feoli ◽  
G Lambiase ◽  
G Papini ◽  
G Scarpetta
Keyword(s):  
Massive Scalar ◽  
Scalar Particles ◽  
Schwarzschild Geometry

S-MATRICES FOR QUANTUM CHARGED MASSIVE SCALAR PARTICLES ON KERR BLACK HOLES

2001 ◽  
Vol 16 (22) ◽  
pp. 1465-1477 ◽  
Author(s):  
N. E. FIRSOVA
Keyword(s):  
Black Holes ◽  
Scalar Field ◽  
Hawking Radiation ◽  
Massive Scalar ◽  
Numerical Computations ◽  
Scattering Problems ◽  
Complex Scalar ◽  
Scalar Particles ◽  
Complex Scalar Field ◽  
Kerr Black Holes

The results obtained recently on the scattering problems connected with the contribution of the topologically inequivalent configurations of the massless complex scalar field on Kerr black holes to the Hawking radiation are extended to include the massive case as well. The corresponding S-matrices are examined and presented in the form convenient for numerical computations.

S-MATRICES FOR QUANTUM CHARGED MASSIVE SCALAR PARTICLES ON SCHWARZSCHILD AND REISSNER–NORDSTRÖM BLACK HOLES

2000 ◽  
Vol 09 (01) ◽  
pp. 79-89 ◽  
Author(s):  
N. E. FIRSOVA
Keyword(s):  
Black Holes ◽  
Hawking Radiation ◽  
Scalar Fields ◽  
Massive Scalar ◽  
Numerical Computations ◽  
Scattering Problems ◽  
Complex Scalar ◽  
Scalar Particles

We study the scattering problems arising when considering the contribution of the topologically inequivalent configurations (TICs) of the massive complex scalar fields on Schwarzschild and Reissner–Nordström black holes to the Hawking radiation. The corresponding S-matrices are explored and presented in the form convenient to numerical computations.

scholarly journals Rest frame vacua of massive Klein–Gordon fields on spatially flat FLRW spacetimes

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
Ion I. Cotăescu
Keyword(s):  
State Space ◽  
Rest Frame ◽  
Particle Creation ◽  
Time Dependent ◽  
Massive Scalar ◽  
De Sitter ◽  
Rest Energy ◽  
Dynamic Vacuum ◽  
Scalar Particles ◽  
Klein Gordon

Abstract We propose a method of projecting the quantum states from a state space of a given geometry into another state space generated by a different geometry, taking care of the correct normalization which is crucial in interpreting the quantum theory. Thanks to this method we can define on any spatially flat FLRW spacetime states in which genuine Minkowskian parameters are measured. We use these Minkowskian states for separating the frequencies in the rest frames of the massive scalar particles defining thus the scalar rest frame vacuum. We show that this vacuum is stable on the de Sitter expanding universe where the energy is conserved. In contrast, on a spatially flat FLRW spacetime with a Milne-type scale factor this vacuum is found to be dynamic, corresponding to a time-dependent rest energy interpreted as an effective mass. This dynamic vacuum gives rise to cosmological particle creation which is significant only in the early Milne-type universe considered here. Some interesting features of this new effect are pointed out in a brief analysis.

Sign in / Sign up

Export Citation Format

Share Document