IS THE INVISIBLE HADRONIC AXION ALWAYS HARMLESS?

1987 ◽  
Vol 02 (06) ◽  
pp. 409-415 ◽  
Author(s):  
HAI-YANG CHENG
Keyword(s):  
Goldstone Boson ◽  
Higgs Field ◽  
Tree Level ◽  
Hadronic Axion ◽  
Invisible Axion ◽  
The Invisible

In the Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axion model, if the invisible axion is hadronized (i.e. if the axion is made to decouple from leptons at tree level), it will be accompanied by a visible real Goldstone boson which interacts with both leptons and quarks. Consequently, the Higgs field coupled to right-handed leptons must also couple to right-handed d- or u-type quark singlets. Astrophysical bounds on viable hadronic axions are discussed.

scholarly journals Electroweak corrections in a pseudo Nambu-Goldstone Dark Matter model revisited

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Seraina Glaus ◽  
Margarete Mühlleitner ◽  
Jonas Müller ◽  
Shruti Patel ◽  
Tizian Römer ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Parameter Space ◽  
Goldstone Boson ◽  
Indirect Evidence ◽  
Tree Level ◽  
Dark Matter Candidate ◽  
Nucleon Scattering ◽  
The Cross ◽  
Electroweak Corrections

Abstract Having so far only indirect evidence for the existence of Dark Matter a plethora of experiments aims at direct detection of Dark Matter through the scattering of Dark Matter particles off atomic nuclei. For the correct interpretation and identification of the underlying nature of the Dark Matter constituents higher-order corrections to the cross section of Dark Matter-nucleon scattering are important, in particular in models where the tree-level cross section is negligibly small. In this work we revisit the electroweak corrections to the dark matter-nucleon scattering cross section in a model with a pseudo Nambu-Goldstone boson as the Dark Matter candidate. Two calculations that already exist in the literature, apply different approaches resulting in different final results for the cross section in some regions of the parameter space leading us to redo the calculation and analyse the two approaches to clarify the situation. We furthermore update the experimental constraints and examine the regions of the parameter space where the cross section is above the neutrino floor but which can only be probed in the far future.

scholarly journals Matching and running sensitivity in non-renormalizable inflationary models

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Jacopo Fumagalli ◽  
Marieke Postma ◽  
Melvin van den Bout
Keyword(s):  
Particle Physics ◽  
Higgs Field ◽  
Effective Field ◽  
Large Field ◽  
Tree Level ◽  
Planck Data ◽  
The Standard Model ◽  
Set Up ◽  
The One ◽  
Inflationary Models

Abstract Most of the inflationary models that are in agreement with the Planck data rely on the presence of non-renormalizable operators. If the connection to low energy particle physics is made, the renormalization group (RG) introduces a sensitivity to ultraviolet (UV) physics that can be crucial in determining the inflationary predictions. We analyse this effect for the Standard Model (SM) augmented with non-minimal derivative couplings to gravity. Our set-up reduces to the SM for small values of the Higgs field, and allows for inflation in the opposite large field regime. The one-loop beta functions in the inflationary region are calculated using a covariant approach that properly accounts for the non-trivial structure of the field space manifold. We run the SM parameters from the electroweak to the inflationary scale, matching the couplings of the different effective field theories at the boundary between the two regimes, where we also include threshold corrections that parametrize effects from UV physics. We then compute the spectral index and tensor-to-scalar ratio and find that RG flow corrections can be determinant: a scenario that is ruled out at tree level can be resurrected and vice versa.

scholarly journals ASYMPTOTICALLY SAFE WEAK INTERACTIONS

2011 ◽  
Vol 26 (21) ◽  
pp. 1571-1576 ◽  
Author(s):  
XAVIER CALMET
Keyword(s):  
General Relativity ◽  
Fixed Point ◽  
Higgs Boson ◽  
Weak Interactions ◽  
Higgs Field ◽  
Tree Level ◽  
Electroweak Interactions ◽  
Weak Scale

We emphasize that the electroweak interactions without a Higgs boson are very similar to quantum general relativity. The Higgs field could just be a dressing field and might not exist as a propagating particle. In that interpretation, the electroweak interactions without a Higgs boson could be renormalizable at the nonperturbative level because of a nontrivial fixed point. Tree-level unitarity in electroweak bosons scattering is restored by the running of the weak scale.

scholarly journals Stabilizing the invisible axion in 3-3-1 models

2004 ◽  
Vol 69 (7) ◽  
Author(s):  
Alex G. Dias ◽  
V. Pleitez
Keyword(s):  
Invisible Axion ◽  
The Invisible

Instability of the invisible axion

1992 ◽  
Vol 283 (3-4) ◽  
pp. 278-281 ◽  
Author(s):  
S. Ghigna ◽  
M. Lusignoli ◽  
M. Roncadelli
Keyword(s):  
Invisible Axion ◽  
The Invisible

scholarly journals Extended Search for the Invisible Axion with the Axion Dark Matter Experiment

2020 ◽  
Vol 124 (10) ◽  
Author(s):  
T. Braine ◽  
R. Cervantes ◽  
N. Crisosto ◽  
N. Du ◽  
S. Kimes ◽  
...  
Keyword(s):  
Dark Matter ◽  
Invisible Axion ◽  
The Invisible
Sign in / Sign up

Export Citation Format

Share Document