Paper Search
Found 29 papers
-
$\mathcal{P}$, $\mathcal{T}$-violating axion-mediated interactions in RaOH molecule
Anna Zakharova
May 13, 2025
hep-ph arXiv: 2505.08667If axion simultaneously has the scalar couplings to the nucleons and pseudo-scalar couplings to the electrons, it may mediate a $\mathcal
axion-mediated interactions p,t-violation raoh molecule electron-nucleon interaction molecular vibrations dark matter axions axion-like particles strong cp problem electron electric dipole moment scalar-pseudoscalar interaction one-center restoration method coupled-channels technique born-oppenheimer approximation generalized effective core potential dirac-coulomb equation self-consistent field dirac19 software rovibrational states molecular parameter w_ax triatomic molecules laser cooling yboh baf parity violation searchesquant-ph hep-ph physics.atom-ph -
High Reheating Temperature without Axion Domain Walls
Shota Nakagawa, Yuichiro Nakai, Yu-Cheng Qiu, Lingyun Wang, Yaoduo Wang
September 29, 2025
hep-ph arXiv: 2509.24812We investigate a cosmological scenario in which the Peccei-Quinn (PQ) symmetry remains broken in the entire history of the Universe, thereby avoiding the
peccei-quinn symmetry axion domain walls isocurvature perturbations reheating temperature finite-temperature effective potential flat directions symmetry non-restoration scalar interactions cosmological scenario strong cp problem thermal leptogenesis inflation misalignment mechanism ksvz axion model heavy quarks scalar fields thermal mass daisy resummation parameter space high-scale baryogenesis axion strings vacuum expectation value matsubara formalism qcd axionhep-th hep-ph astro-ph.CO -
Detecting axion dynamics on the surface of magnetic topological insulators
Zhi-Qiang Gao, Taige Wang, Michael P. Zaletel, Dung-Hai Lee
September 25, 2024
cond-mat.str-el arXiv: 2409.17230Axions, initially proposed to solve the strong CP problem, have recently gained attention in condensed matter physics, particularly in topological
axion dynamics magnetic topological insulators condensed matter physics two-photon decay branching ratio chern-simons term axion electrodynamics strong cp problem topological insulators perturbative approach microwave technology stimulated emission domain walls surface states bulk gap surface exchange gap four-band dirac model dissipative two-level system magnetoelectric response berry phase mnbi2te4 photon flux spin flip in-plane photons time-dependent perturbation theorycond-mat.mes-hall cond-mat.str-el cond-mat.mtrl-sci -
GeV-scale QCD Axion
Hitoshi Murayama
January 05, 2026
hep-ph arXiv: 2601.02465In order to solve the strong CP problem, we study the possibility that the Peccei--Quinn symmetry is broken {\it below}\/ the QCD scale. We find that a QCD
strong cp problem peccei-quinn symmetry qcd axion gev-scale axion quantum gravity corrections right-handed up quark flavor-changing neutral currents pion mass splitting uv completion vector-like quark chiral lagrangian axion decay constant hadronic resonances higgs factory large hadron collider axion-like particle nambu-goldstone boson chiral anomaly baryon octet sn1987a hadroproduction z width yukawa coupling kaplan-manohar ambiguity fujikawa measurehep-ph hep-ex -
A particle on a ring or: how I learned to stop worrying and love $θ$-vacua
Mohammad Aghaie, Ryosuke Sato
January 26, 2026
hep-ph arXiv: 2601.18248Recently, Ai, Cruz, Garbrecht, and Tamarit (ACGT)~\cite{Ai:2020ptm, Ai:2024vfa, Ai:2024cnp, Ai:2025quf
quantum mechanics strong cp problem theta-vacua topological sectors path integral quantum rotor quantum pendulum topological susceptibility order of limits qcd winding number canonical quantization partition function energy spectrum propagator wkb approximation dilute instanton gas approximation ground-state energy gauge theories aharonov-bohm effect euclidean action semiclassical expansion superselection rule large gauge transformation tunnelinghep-ph quant-ph hep-th -
Axion-like particles from soft supersymmetry breaking
Gayatri Ghosh
January 07, 2026
hep-ph arXiv: 2601.04017We study a supersymmetric effective field theory in which the mass of an axion-like particle (ALP) is generated predominantly by soft supersymmetry-breaking effects. The
axion-like particles soft supersymmetry breaking effective field theory peccei-quinn symmetry supergravity saxion axino gravitino mass spontaneous symmetry breaking big bang nucleosynthesis cosmology astrophysics laboratory searches beam-dump experiments na64 belle ii axion-photon coupling decay constant mass spectrum scalar potential strong cp problem planck-suppressed operators relic abundance dark matter coleman-weinberg potentialhep-ph -
Strong CP and the QCD Axion: Lecture Notes via Effective Field Theory
Francesco Sannino
January 27, 2026
hep-ph arXiv: 2601.19735These lecture notes provide a self-contained, graduate-level introduction to the strong $CP$ problem and QCD axion physics from an effective field theory (EFT) viewpoint
strong cp problem qcd axion effective field theory chiral effective theory θ-angle topological susceptibility peccei-quinn mechanism axion potential witten-veneziano relation neutron electric dipole moment vacuum alignment dashen equations u(1)_a anomaly chiral symmetry breaking topological charge density axion quality problem ksvz axion dfsz axion axion-photon coupling domain-wall number gravitational corrections supersymmetric yang-mills orientifold planar equivalence veneziano-yankielowicz lagrangian cp violationhep-ph hep-th hep-ex hep-lat -
Axion condensates in neutron stars and radial oscillation modes
Antonio Gómez-Bañón, Pantelis Pnigouras, José A. Pons
October 17, 2025
hep-ph arXiv: 2510.16245Light QCD axions, introduced to solve the strong CP problem, may form condensates inside neutron stars, giving rise to a novel ground state of dense matter
axion condensates neutron stars radial oscillation modes qcd axions strong cp problem bsk26 equation of state tolman-oppenheimer-volkoff equations klein-gordon equations linear perturbation analysis quasinormal modes fluid-dominated oscillations axion modes axion-induced damping decay timescales khz axion masses neutron star seismology numerical integration phase-amplitude method boundary value problem axion-baryon coupling modified nucleon mass mass-radius relation gravitational waves dark matter outgoing radiation conditionhep-ph astro-ph.HE -
Optimising Re-entrant Cavity Designs for Low Mass Axion Haloscopes
Ben T. McAllister, Raj Aryan Singh, Paige Rose Taylor, Elrina Hartmann, Geoffrey Brooks
January 28, 2026
physics.ins-det arXiv: 2601.20151Axion haloscopes provide a leading experimental approach to detecting QCD axion dark matter through resonant axion-photon conversion in microwave cavities
axion haloscope re-entrant cavity low mass axion dark matter detection finite-element analysis comsol multiphysics scan time form factor quality factor geometric optimization double attack design hybrid cavity microwave cavity resonant frequency axion-photon conversion qcd axion strong cp problem parameter sweep effective scan time figure of merit cavity tuning mode interaction avoided level crossing lumped lc circuit design comparisonphysics.ins-det -
Graviton energy spectra arising from the KSVZ axion model
Yu Gao, Yonghua Wang, Lin-Yun He, Wei Chao
January 28, 2026
hep-ph arXiv: 2601.20767Axion, the goldstone boson arising from the spontaneous breaking of a global $U(1)$ Peccei-Quinn symmetry, provides a dynamical solution to the
axion ksvz axion model gravitational waves graviton bremsstrahlung heavy scalar vector-like quark strong cp problem peccei-quinn symmetry dark matter cosmological evolution matter-dominated era thermal gravitational wave background ultra-high-frequency gravitational waves boltzmann equation feynman diagrams decay channels yukawa couplings pq symmetry breaking early universe gw spectrum peak frequency indirect detection qcd axion vlq decay scalar decayhep-ph astro-ph.CO -
The Search for the Cosmological Axion -- A New Refined Narrow Mass Window and Detection Scheme
Masroor H. S. Bukhari
August 18, 2024
hep-ex arXiv: 2408.09553Based upon a previous axion mass proposal and detection scheme, as well as considering the axion mass ranges suggested by persuasive simulations in recent years, we
cosmological axion axion-like particles dark matter axion mass window compton frequency resonant cavity detection inverse primakoff effect josephson parametric amplifier resonant tunneling diode ku microwave band strong cp problem pq symmetry misalignment mechanism string-wall systems dilute instanton gas model decay constant cold dark matter bose-einstein condensate quantum chromodynamics string theory post-inflation scenario fitting routines wmap data planck collaboration cryogenic amplificationhep-ph hep-ex -
Radiative Dirac Neutrino Masses from Modular $S_3$ Symmetry in an Axion Model
Sin Kyu Kang, Ranjeet Kumar, Hiroshi Okada
January 30, 2026
hep-ph arXiv: 2601.22740We present a unified axion model framework that simultaneously addresses the origin of neutrino masses, leptonic flavor structure, the strong CP problem, and dark matter
radiative dirac neutrino masses modular s3 symmetry axion model ksvz-type axion one-loop mass generation dirac neutrinos residual z3 symmetry global u(1)pq symmetry strong cp problem dark matter axion-photon coupling charged lepton flavor violation lepton g-2 exotic colored fermions vector-like fermions scotogenic model pecci-quinn mechanism qcd axion misalignment mechanism rank-two neutrino mass matrix massless neutrino normal hierarchy inverted hierarchy sum of neutrino masses modular yukawa couplingshep-ph hep-ex -
Good flavor search in SU(5): a machine learning approach
Fayez Abu-Ajamieh, Shinsuke Kawai, Nobuchika Okada
November 11, 2025
hep-ph arXiv: 2511.08154We revisit the fermion mass problem of the $SU(5)$ grand unified theory using machine learning techniques. The original $SU(5)$ model proposed by
su(5) grand unified theory machine learning fermion mass problem georgi-glashow model 24-higgs model 45-higgs model yukawa couplings numerical optimization adam algorithm loss function supersymmetric su(5) non-supersymmetric su(5) renormalisation group analysis gauge coupling unification flavor sector ckm matrix high-energy physics beyond the standard model parameter sampling vectorlike fermions higher-dimensional operator strong cp problem beauty criterion planck-suppressed operatorhep-ph cs.LG hep-th -
CP conservation in the strong interactions
Wen-Yuan Ai, Bjorn Garbrecht, Carlos Tamarit
April 24, 2024
hep-ph arXiv: 2404.16026We discuss matters related to the point that topological quantization in the strong interaction is a consequence of an infinite spacetime volume. Because of the
qcd strong interactions cp conservation theta-parameter topological quantization path integral infinite volume limit topological sectors winding number steepest-descent contours lefschetz thimbles dilute instanton gas approximation 't hooft operator chiral anomaly neutron electric dipole moment cluster decomposition chiral effective field theory chiral perturbation theory yang-mills theory bpst instantons atiyah-singer index theorem vacuum correlation functions euclidean spacetime topological susceptibility strong cp problemhep-ph hep-th hep-ex hep-lat -
Oscillating Imprints of Dark Matter in Mesons Decays
Prisco Lo Chiatto, Babette Döbrich, Gilad Perez
May 22, 2026
hep-ph arXiv: 2605.24090We study scenarios in which ultralight dark matter (ULDM) causes oscillations of the Cabibbo--Kobayashi--Maskawa (CKM
ultralight dark matter ckm matrix meson decays nelson-barr mechanism froggatt-nielsen model na62 experiment kaon physics flavor physics pseudo-nambu-goldstone boson quadratic coupling linear coupling equivalence principle strong cp problem particle lifetime event counting time-dependent signatures statistical uncertainty fourier transform power spectral density quark sector cp violation flavor factories dark matter detection particle flux misalignment mechanismhep-ph hep-ex -
Solar Axions from Nuclear Transitions
Tanmoy Kumar, Newton Nath
May 22, 2026
hep-ph arXiv: 2605.24121We investigate the possibility of detecting 14.4 keV and 9.4 keV solar axions and axion-like particles that could be produced in the M1
solar axions axion-like particles nuclear transitions m1 transition 57fe 83kr chandrayaan-2 solar x-ray monitor inverse primakoff process axion-photon coupling axion-nucleon coupling solar magnetic field x-ray astronomy bsm physics strong cp problem qcd axion solar core plasma frequency resonant conversion likelihood method multinest solar abundance soft x-rays particle astrophysics solar atmospherenucl-th hep-ph astro-ph.HE astro-ph.SR -
Axion Production and Detection Using a Dual NMR-type Experiment
Fengwei Yang, Jeff A. Dror, Qiushi Wei
August 07, 2026
hep-ph arXiv: 2510.18944Axions that couple to nuclear spins via the axial current interaction can be both produced and detected using nuclear magnetic resonance (NMR) techniques
axion nuclear magnetic resonance nmr spin precession axial current interaction axion-nucleon coupling dual nmr experiment near-field regime evanescent wave squid magnetometer xenon-129 larmor frequency transverse relaxation time signal-to-noise ratio bayesian analysis astrophysical constraints neutron star cooling supernova 1987a qcd axion strong cp problem dark matter laboratory search spin sensor coherent oscillation hyperpolarizationhep-ph astro-ph.CO hep-ex -
Big Axions
Marius Kongsore, Hannah Banks, Neal Weiner
August 06, 2026
hep-ph arXiv: 2606.05276We introduce big axions: axion models in which a Nambu-Goldstone mode emerges from the collective spontaneous breaking of a network of U
big axions little big axions axion qcd axion strong cp problem dark matter theory space deconstruction nambu-goldstone global symmetry gauge symmetry charge matrix moose dual moose topology domain wall peccei-quinn ksvz dfsz pre-inflationary post-inflationary quality accidental symmetry collective symmetry breaking extra-dimensionalhep-ph hep-th -
High Precision Fundamental Physics Experiments at JLab with Spin-transparent Storage Rings of Low-energy Polarized Electron Beams
Ye Tian, Udit Raha, Vasiliy Morozov, Son Nguyen, Li, Vladimir Khachatryan, Riad Suleiman, Alberto Accardi, Carlos Ayerbe Gayoso, Marco Battaglieri, Devesh Bhattarai, Silviu Covrig Dusa, Yaroslav Derbenev, Forrest Friesen, Joseph Grames, Paul Guèye, Tyler J. Hague, Ching Him Leung, Wenliang, Magno V. T. Machado, Preet Mann, Michael Nycz, Howard Oh, Mario Reig, Marco Schreck, Nathaniel Sherrill, Zakia Tithi, Alexandre Vieira, Erik Wrightson, Zichen Yin
August 09, 2026
nucl-ex arXiv: 2608.08551A breakthrough in fundamental physics experiments measuring particle spin precession may happen if spin-transparent storage rings become adopted tools for such
spin-transparent storage rings electric dipole moment electron edm axion ultralight dark matter polarized electron beams mott polarimetry figure-8 ring cp violation matter antimatter asymmetry thomas-bmt equation spin precession jlab low energy recirculator facility counter-rotating beams bates optics stochastic cooling spin coherence time systematic uncertainties strong cp problem peccei-quinn mechanism quantum computing positron edm cpt symmetry beam polarizationhep-ph nucl-ex hep-th physics.acc-ph physics.app-ph -
Small-instanton effects in an atlas of KSVZ axion models
Ning Chen, Saurabh K. Shukla
August 09, 2026
hep-ph arXiv: 2608.08602We investigate small-instanton contributions to the axion potential across a range of KSVZ models containing vector-like quarks~(VQs
axion ksvz model small instanton vector-like quark qcd axion axion mass axion-photon coupling instanton topological susceptibility naive dimensional analysis zero mode saturation yukawa coupling strong cp problem peccei-quinn symmetry uv sensitivity phenomenology axion potential anomaly coefficient domain wall number renormalization group two-loop beta function matching scale planck scale gauge perturbativity fermion zero modehep-ph hep-th