Constraining the axion mass through gamma-ray observations of pulsars

Lloyd, Sheridan J.; Chadwick, P. M.; Brown, A. M.

doi:10.1103/physrevd.100.063005

Cited by 12 publications

(6 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, if the SN1987A bounds are flexible due to uncertainties in modeling supernovae as well as uncertainties in the nuclear EoS (as is suggested by [25,48], see also [49] for useful commentary), in the highest density and temperature conditions possibly reached in mergers, axions would be trapped for couplings just 4 times the SN1987 bound. However, we note that there are many other independent proposed upper bounds on the axion-neutron coupling, coming from neutron star observations [43,[50][51][52][53], all within about an order of magnitude in either direction of the SN1987A bound.…”

Section: Mfp Dependence On the Axion-neutron Couplingmentioning

confidence: 71%

Axions in neutron star mergers

Harris,

Fortin,

Sinha

et al. 2020

Preprint

View full text Add to dashboard Cite

Supernovae and cooling neutron stars have long been used to constrain the properties of axions, such as their mass and interactions with nucleons and other Standard Model particles. We investigate the prospects of using neutron star mergers as a similar location where axions can be probed in the future. We examine the impact axions would have on mergers, considering both the possibility that they free-stream through the dense nuclear matter and the case where they are trapped. We calculate the mean free path of axions in merger conditions, and find that they would free-stream through the merger in all thermodynamic conditions. In contrast to previous calculations, we integrate over the entire phase space while using a relativistic treatment of the nucleons, assuming the matrix element is momentum-independent. In particular, we use a relativistic mean field theory to describe the nucleons, taking into account the precipitous decrease in the effective mass of the nucleons as density increases above nuclear saturation density. We find that within current constraints on the axion-neutron coupling, axions could cool nuclear matter on timescales relevant to neutron star mergers. Our results may be regarded as first steps aimed at understanding how axions affect merger simulations and potentially interface with observations.

show abstract

Section: Mfp Dependence On the Axion-neutron Couplingmentioning

confidence: 71%

Axions in neutron star mergers

Harris,

Fortin,

Sinha

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…The astrophysical upper bounds on the axion mass, m (a) < 10 −2 eV/c 2 , are based on the particle physics methods. One estimates contributions to the fluxes of gamma rays due to the decay of axions produced via the bremsstrahlung mechanism [382,383] in nucleon-nucleon collisions in pulsars [384] and in the explosion of the supernova SN1987A [385]. The question of the lower limit on the axion mass remains open.…”

Section: B Detecting Axions In Flat Spacetimementioning

confidence: 99%

General relativity effects in precision spin experimental tests of fundamental symmetries

Vergeles,

Nikolaev,

Obukhov

et al. 2022

Preprint

View full text Add to dashboard Cite

A search for the P -and CP (T )-violating electric dipole moments (EDM) of atoms, particles and nuclei with sensitivity up to 10 −15 in units of the magnetic dipole moments, allowed by all discrete symmetries, is one of the topical problems of modern physics. According to Sakharov, CP -violation is one of the three key criteria of the baryogenesis in the generally accepted paradigm of the Big Bang cosmology. All three criteria are supported by the Standard Model, but it fails to describe quantitatively the observed baryon asymmetry of the Universe. This is regarded a strong argument in favor of the existence of CP -symmetry breaking mechanisms beyond the minimal Standard Model, which can lead to a measurable EDMs of atoms, particles and nuclei. Searches for the EDM via the spin rotation in electric fields are currently underway in dozens of laboratories worldwide. Direct searches for EDM of charged particles and nuclei are possible only in storage rings (COSY, NICA). After successful studies by the JEDI collaboration at the COSY synchrotron, at the forefront in the field is a search for the proton EDM in an electrostatic storage ring with the proton spin frozen at the magic energy with the projected sensitivity dp ∼ 10 −29 e•cm. The prototype storage ring PTR is proposed as a precursor to such a dedicated storage ring, with the prospect of the frozen proton spin ring becoming a part of the physics at CERN beyond the Large Hadron Collider program. Following a brief introduction to the CP -violation physics and the baryogenesis, the review presents a detailed discussion of significant contributions to the spin dynamics from the terrestrial gravity along with the new effects of Earth's rotation in ultrasensitive searches for the EDM of charged particles and neutrons. Quite remarkably, for the projected sensitivity to the proton EDM, these false EDM effects can by one to two orders of magnitude exceed the signal of the proton EDM, and become comparable to an EDM contribution in experiments with ultracold neutrons. We also discuss the role of a precessing spin as a detector of the axion-like dark matter, and consider applications of the quantum gravitational anomalies to the dense matter hydrodynamics and the spin phenomena in the non-central nuclear collisions.

show abstract

“…To view a copy of this licence, visit http://creativecomm ons.org/licenses/by/4.0/. Funded by SCOAP 3 . SCOAP 3 supports the goals of the International Year of Basic Sciences for Sustainable Development.…”

Section: Data Availability Statementmentioning

confidence: 99%

“…If the axion exists, it can be a possible component of cold dark matter. The mass of dark matter axions is restricted by astrophysical observations [3,4] and cosmological arguments [5][6][7]. An experimental search for axions being quanta of the pseudoscalar field can result in a discovery of fifth force.…”

mentioning

confidence: 99%

Relativistic spin dynamics conditioned by dark matter axions

Silenko

2022

Eur. Phys. J. C

View full text Add to dashboard Cite

The relativistic spin dynamics defined by the pseudoscalar field of dark matter axions is rigorously determined. The relativistic Hamiltonian in the Foldy–Wouthuysen representation is derived. It agrees with the previously obtained nonrelativistic Hamiltonians and the relativistic classical estimation of the axion wind effect. In the relativistic Hamiltonian, the biggest term describes the extraordinary (three orders of magnitude) enhancement of the axion wind effect in storage ring experiments as compared with experiments with immobile particles. This term defines the spin rotation about the longitudinal axis. The effects caused by the axion-induced oscillating EDM and the axion wind consist in the spin rotations about the different horizontal axes and phases of stimulating oscillations differ by $$\pi /2$$ π / 2 . Experiments in a search for dark matter axions has been discussed. The two experimental designs for axion search experiments in storage rings have been elaborated.

show abstract

Constraining the axion mass through gamma-ray observations of pulsars

Cited by 12 publications

References 62 publications

Axions in neutron star mergers

Axions in neutron star mergers

General relativity effects in precision spin experimental tests of fundamental symmetries

Relativistic spin dynamics conditioned by dark matter axions

Contact Info

Product

Resources

About