Search for sub-eV axion-like resonance states via stimulated quasi-parallel laser collisions with the parameterization including fully asymmetric collisional geometry

Abstract

We have searched for axion-like resonance states by colliding optical photons in a focused laser field (creation beam) by adding another laser field (inducing beam) for stimulation of the resonance decays, where frequency-converted signal photons can be created as a result of stimulated photon-photon scattering via exchanges of axion-like resonances. A quasi-parallel collision system (QPS) in such a focused field allows access to the sub-eV mass range of resonance particles. In past searches in QPS, for simplicity, we interpreted the scattering rate based on an analytically calculable symmetric collision geometry in both incident angles and incident energies by partially implementing the asymmetric nature to meet the actual experimental conditions. In this paper, we present new search results based on a complete parameterization including fully asymmetric collisional geometries. In particular, we combined a linearly polarized creation laser and a circularly polarized inducing laser to match the new parameterization. A 0.10 mJ/31 fs Ti:sapphire laser pulse and a 0.20 mJ/9 ns Nd:YAG laser pulse were spatiotemporally synchronized by sharing a common optical axis and focused into the vacuum system. Under a condition in which atomic background processes were completely negligible, no significant scattering signal was observed at the vacuum pressure of 2.6 × 10−5 Pa, thereby providing upper bounds on the coupling-mass relation by assuming exchanges of scalar and pseudoscalar fields at a 95% confidence level in the sub-eV mass range.

Search for sub-eV axion-like particles in a stimulated resonant photon-photon collider with two laser beams based on a novel method to discriminate pressure-independent components

“…n cPLS and n iPLS are the expected numbers of photons due to plasma formation with only creation and inducing beams, respectively. As had already been performed in past searches [11][12][13], n FWM in eq. (2.1) can be determined from eq.…”

“…In the SAPPHIRES00 search [11], we looked for ALPs with sub-mJ-level pulse lasers. We provided a way to evaluate the background yields from residual-gas-originating aFWM, plasma, and other noise sources.…”

“…The vFWM yield, which, more specifically from the particle physics point of view, is the signal yield per pulse collision from stimulated resonant photon-photon scattering, Y c+i , is factorized as [11,15]…”

Axion Searches at the LHC: FASER as a Light Shining through Walls Experiment

“…2 alongside existing constraints. In the left panel, we show the broad picture including all existing constraints on axions arising from helioscopes [70][71][72][73], haloscopes and LSW experiments [99][100][101][102][103][104] (red); astrophysics 2 [36, 107-141] (green); cosmology [37,142] (blue); and accelerator experiments [31,[143][144][145][146][147][148][149][150][151][152][153][154][155][156][157] (gray). The projected sensitivity for searches at FASER and future experiments at the FPF is indicated by the blue solid lines.…”

Feebly-interacting particles: FIPs 2020 workshop report

“…Figure50: Summary of current bounds and prospects of ongoing and future searches for the axion-photon coupling. Regions shaded in colours correspond to experiments: mauve for laboratory[498,499,706,707,713,714,715] and collider[703,741,185,742,743,185,744,745,746,747,748,749,749,750,751] searches for axions, green for searches for solar axions[236,158], and blue for direct dark matter detection experiments[752,667,505,507,561,661,290,285,288,753,289,276,676,754,402,689,508,509,691,704,755,664,511,708, 677,…”