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Autor:
Nick E. Mavromatos
Publikováno v:
Journal of Physics: Conference Series. 2038:012019
In this mini review, we discuss some recent developments regarding properties of (quantum) field-theory models containing anti-Hermitian Yukawa interactions between pseudoscalar fields (axions) and Dirac (or Majorana) fermions. Specifically, after mo
Autor:
Yong Xu, Manuel Drees
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2021:012
We revisit the renormalizable polynomial inflection point model of inflation, focusing on the small field scenario which can be treated fully analytically. In particular, the running of the spectral index is predicted to be $\alpha = -1.43 \times 10^
Publikováno v:
Journal of Physics G: Nuclear and Particle Physics. 48:095104
Heavy-flavored hadrons are unique probes to study the properties of hot and dense QCD medium produced in ultra-relativistic heavy-ion collisions at RHIC and the LHC. Transverse spherocity is one of the event-topology variables used to separate jetty
Autor:
Tanmay Vachaspati
Publikováno v:
Reports on Progress in Physics. 84:074901
A variety of observations impose upper limits at the nano Gauss level on magnetic fields that are coherent on inter-galactic scales while blazar observations indicate a lower bound $\sim 10^{-16}$ Gauss. Such magnetic fields can play an important ast
Publikováno v:
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
If the Peccei-Quinn symmetry associated to an axion has ever been restored after inflation, axion strings inevitably produce a contribution to the stochastic gravitational wave background. Combining effective field theory analysis with numerical simu
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2021:034
It has been pointed out that hypermagnetic helicity decay at the electroweak symmetry breaking may have produced the observed baryon asymmetry of the Universe through the chiral anomaly in the standard model of particle physics. Although fully helica
Autor:
J. McDonald
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2021:069
In the conventional metric formulation of gravity, the Higgs Inflation model violates unitarity in the electroweak vacuum in Higgs scattering at the energy scale $\Lambda \sim M_{Pl}/\xi$, where $\xi \sim 10^4$ is the non-minimal coupling of the Higg
Publikováno v:
Journal of Cosmology and Astroparticle Physics. 2021:015-015
The QCD axion and an axion-like particle (ALP) are compelling candidates of dark matter. For the QCD axion, it is known that when the Peccei-Quinn (PQ) symmetry is spontaneously broken after inflation, the large initial fluctuation can lead to axion
Publikováno v:
JCAP
JCAP, 2020, 08, pp.047. ⟨10.1088/1475-7516/2020/08/047⟩
JCAP, 2020, 08, pp.047. ⟨10.1088/1475-7516/2020/08/047⟩
We consider Dark Matter composed of an oscillating singlet scalar field. On top of the mass term, the scalar is equipped with a potential spontaneously breaking Z_2-symmetry. This potential dominates at early times and leads to the time-dependent exp
Publikováno v:
Journal of Physics: Conference Series. 1586:012044
In the Standard Model, chiral electroweak anomalies predict nonperturbative interactions that violate baryon ($B$) plus lepton number ($L$). The potential observability of these processes at colliders has been amply discussed in the literature, mostl