scholarly journals Search for a light pseudoscalar particle in the decay $K\rightarrow \pi^0 \pi^0 X$ at the KEK-PS E391a experiment

2010 ◽  
Author(s):  
Yu-Chen Tung
Keyword(s):  
Pseudoscalar Particle

Composite States for Fourfermion Interactions by the Method of Broken Symmetries

1970 ◽  
Vol 25 (7) ◽  
pp. 1017-1024 ◽  
Author(s):  
Harald J. W. Müller
Keyword(s):  
Quantum Theory ◽  
Scattering Problem ◽  
Goldstone Boson ◽  
Scalar Particle ◽  
Ladder Approximation ◽  
Elementary Particles ◽  
Lattice Points ◽  
Broken Symmetries ◽  
Lattice Space ◽  
Pseudoscalar Particle

Composite states of quasiparticles are studied in the frame of Bopp's quantum theory of elementary particles in a lattice space. By solving the homogeneous Bethe-Salpeter equations in the combined chain and ladder approximation the theory is found to contain a massless pseudoscalar particle (the Goldstone boson), a scalar particle of mass 2 m and an axialvector particle of mass 2 m - d, d > 0, where m is the mass of the quasiparticles and d a small quantity depending on the number of lattice points (or equivalently the cutoff). The method of summation of chain and ladder diagrams by means of the Fierz formula is treated in some detail. Analogies with the model of Nambu and Jona-Lasinio are pointed out. Finally some remarks on the scattering problem are added

scholarly journals FIELD-INDUCED INTERACTION OF A PSEUDOSCALAR PARTICLE WITH PHOTON IN A MAGNETIZED e-e+ PLASMA

2006 ◽  
Vol 21 (05) ◽  
pp. 433-443 ◽  
Author(s):  
N. V. MIKHEEV ◽  
E. N. NARYNSKAYA
Keyword(s):  
Magnetic Field ◽  
Uniform Magnetic Field ◽  
Effective Interaction ◽  
Photon Pair ◽  
Effective Coupling ◽  
Physical Conditions ◽  
Pseudoscalar Particle

The effective interaction of a pseudoscalar particle with photon in plasma with the presence of a constant uniform magnetic field is investigated. It is shown that under some physical conditions, the effective coupling between pseudoscalar particle and photon does not depend on medium parameters and particles momentum. The probability of the familon decays into photon pair in a strongly magnetized degenerate ultrarelativistic plasma is calculated.

scholarly journals Reconstructing heavy Higgs boson masses in a type X two-Higgs-doublet model with a light pseudoscalar particle

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Eung Jin Chun ◽  
Siddharth Dwivedi ◽  
Tanmoy Mondal ◽  
Biswarup Mukhopadhyaya ◽  
Santosh Kumar Rai
Keyword(s):  
Higgs Boson ◽  
Higgs Doublet ◽  
Pseudoscalar Particle ◽  
Doublet Model ◽  
Two Higgs Doublet Model ◽  
Heavy Higgs Boson

Light Pseudoscalar Particle and Stellar Energy Loss

1982 ◽  
Vol 48 (22) ◽  
pp. 1522-1525 ◽  
Author(s):  
M. Fukugita ◽  
S. Watamura ◽  
M. Yoshimura
Keyword(s):  
Energy Loss ◽  
Pseudoscalar Particle ◽  
Stellar Energy

scholarly journals Recent Progress in the Physics of Axions and Axion-Like Particles

2021 ◽  
Vol 71 (1) ◽  
Author(s):  
Kiwoon Choi ◽  
Sang Hui Im ◽  
Chang Sub Shin
Keyword(s):  
Recent Progress ◽  
Model Building ◽  
Formal Theory ◽  
Annual Review ◽  
Model Parameters ◽  
Publication Date ◽  
Axion Field ◽  
Wide Range ◽  
Pseudoscalar Particle ◽  
Field Excursion

The axion is a light pseudoscalar particle postulated to solve issues with the Standard Model, including the strong CP problem and the origin of dark matter. In recent years, there has been remarkable progress in the physics of axions in several directions. An unusual type of axion-like particle termed the relaxion was proposed as a new solution to the weak scale hierarchy problem. There are also new ideas for laboratory, astrophysical, or cosmological searches for axions; such searches can probe a wide range of model parameters that were previously inaccessible. On the formal theory side, the weak gravity conjecture indicates a tension between quantum gravity and a trans-Planckian axion field excursion. Many of these developments involve axions with hierarchical couplings. In this article, we review recent progress in axion physics, with particular attention paid to hierarchies between axion couplings. We emphasize that the parameter regions of hierarchical axion couplings are the most accessible experimentally. Moreover, such regions are often where important theoretical questions in the field are addressed, and they can result from simple model-building mechanisms. Expected final online publication date for the Annual Review of Nutrition, Volume 41 is September 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

The hadronless muon-pair events from charm as the Bethe-Heitler process of a weakly interacting pseudoscalar particle

1983 ◽  
Vol 131 (1-3) ◽  
pp. 234-240 ◽  
Author(s):  
B.R. Kim ◽  
S.K. Oh ◽  
R. Rodenberg ◽  
Ch. Stamm ◽  
B.H. Cho
Keyword(s):  
Muon Pair ◽  
Weakly Interacting ◽  
Pseudoscalar Particle

scholarly journals Future directions in the microwave cavity search for dark matter axions

2014 ◽  
Vol 29 (19) ◽  
pp. 1443004 ◽  
Author(s):  
T. M. Shokair ◽  
J. Root ◽  
K. A. Van Bibber ◽  
B. Brubaker ◽  
Y. V. Gurevich ◽  
...  
Keyword(s):  
Dark Matter ◽  
Mass Range ◽  
Dark Matter Halo ◽  
Microwave Cavity ◽  
Strong Interactions ◽  
Dark Matter Candidate ◽  
Test Bed ◽  
Technological Advances ◽  
Pseudoscalar Particle ◽  
Low Mass

The axion is a light pseudoscalar particle which suppresses CP-violating effects in strong interactions and also happens to be an excellent dark matter candidate. Axions constituting the dark matter halo of our galaxy may be detected by their resonant conversion to photons in a microwave cavity permeated by a magnetic field. The current generation of the microwave cavity experiment has demonstrated sensitivity to plausible axion models, and upgrades in progress should achieve the sensitivity required for a definitive search, at least for low mass axions. However, a comprehensive strategy for scanning the entire mass range, from 1–1000 μeV, will require significant technological advances to maintain the needed sensitivity at higher frequencies. Such advances could include sub-quantum-limited amplifiers based on squeezed vacuum states, bolometers, and/or superconducting microwave cavities. The Axion Dark Matter eXperiment at High Frequencies (ADMX-HF) represents both a pathfinder for first data in the 20–100 μeV range (~5–25 GHz), and an innovation test-bed for these concepts.

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