Ground states of the Mo2, W2, and CrMo molecules: A second and third order multireference perturbation theory study

2007 ◽  
Vol 127 (7) ◽  
pp. 074306 ◽  
Author(s):  
Celestino Angeli ◽  
Alex Cavallini ◽  
Renzo Cimiraglia
Keyword(s):  
Perturbation Theory ◽  
Ground States ◽  
Third Order ◽  
Multireference Perturbation Theory

Third-order multireference perturbation theory: The n-electron valence state perturbation-theory approach

2006 ◽  
Vol 124 (5) ◽  
pp. 054108 ◽  
Author(s):  
Celestino Angeli ◽  
Benoît Bories ◽  
Alex Cavallini ◽  
Renzo Cimiraglia
Keyword(s):  
Perturbation Theory ◽  
Valence State ◽  
Theory Approach ◽  
Third Order ◽  
Multireference Perturbation Theory

scholarly journals The axion-baryon coupling in SU(3) heavy baryon chiral perturbation theory

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Thomas Vonk ◽  
Feng-Kun Guo ◽  
Ulf-G. Meißner
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Heavy Baryon ◽  
Power Counting ◽  
Flavor Symmetry ◽  
Chiral Perturbation ◽  
Third Order ◽  
Stellar Objects ◽  
The Past ◽  
Dense Nuclear Matter

Abstract In the past, the axion-nucleon coupling has been calculated in the framework of SU(2) heavy baryon chiral perturbation theory up to third order in the chiral power counting. Here, we extend these earlier studies to the case of heavy baryon chiral perturbation theory with SU(3) flavor symmetry and derive the axion coupling to the full SU(3) baryon octet, showing that the axion also significantly couples to hyperons. As studies on dense nuclear matter suggest the possible existence of hyperons in stellar objects such as neutron stars, our results should have phenomenological implications related to the so-called axion window.

Low-Lying Excited States of C120 and C151: A Multireference Perturbation Theory Study

2010 ◽  
Vol 114 (47) ◽  
pp. 12363-12368 ◽  
Author(s):  
Tetsuya Sakata ◽  
Yukio Kawashima ◽  
Haruyuki Nakano
Keyword(s):  
Perturbation Theory ◽  
Excited States ◽  
Multireference Perturbation Theory
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