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If massless leptonic photons associated to electron, muon or tau leptonic number exist they would have been emitted from supernova 1987a via the annihilation process $\nu\bar{\nu}\to\gamma_{l}\gamma_{l}$. By requiring that this process does…

High Energy Physics - Phenomenology · Physics 2009-10-30 S. N. Gninenko

The cumulative emission of Axion-Like Particles (ALPs) from all past core-collapse supernovae (SNe) would lead to a diffuse flux with energies ${\mathcal O}(50)$ MeV. We use this to constrain ALPs featuring couplings to photons and to…

High Energy Physics - Phenomenology · Physics 2020-12-03 Francesca Calore , Pierluca Carenza , Maurizio Giannotti , Joerg Jaeckel , Alessandro Mirizzi

A search for resonant absorption of solar axions by $^{169}$Tm nuclei was carried out. A newly developed approach involving low-background cryogenic bolometer based on Tm$_3$Al$_5$O$_{12}$ crystal was used that allowed for significant…

A search for axioelectric absorption of 5.5 MeV solar axions produced in the $p + d \rightarrow {^3\rm{He}}+\gamma~(5.5~ \rm{MeV})$ reaction has been performed with a BGO detectors. A model-independent limit on the product of axion-nucleon…

Assuming neutrino oscillations occur, the pp electron neutrino flux is uncertain by at least a factor of two, the ${\rm ^8B}$ flux by a factor of five, and the ${\rm ^7Be}$ flux by a factor of forty-five. Calculations of the expected…

High Energy Physics - Phenomenology · Physics 2010-11-09 J. N. Bahcall , P. I. Krastev

A search for 5.5-MeV solar axions produced in the $p+d\rightarrow\rm{^3He}+A (5.5 \rm{MeV})$ reaction was performed using the Borexino detector. The Compton conversion of axions to photons, ${\rm A}+e\rightarrow e+\gamma$; the axio-electric…

High Energy Physics - Experiment · Physics 2012-08-27 The Borexino Collaboration

XMASS, a low-background, large liquid-xenon detector, was used to search for solar axions that would be produced by bremsstrahlung and Compton effects in the Sun. With an exposure of 5.6ton days of liquid xenon, the model-independent limit…

The minimal standard electroweak model can be tested by allowing all the solar neutrino fluxes, with undistorted energy spectra, to be free parameters in fitting the measured solar neutrino event rates, subject only to the condition that…

High Energy Physics - Phenomenology · Physics 2009-11-07 John Bahcall

In a previous paper [1], we presented a three-flavour oscillation analysis of the solar neutrino measurements and of the first data from the KamLAND experiment, in terms of the relevant mass-mixing parameters (delta m^2, theta_12,…

High Energy Physics - Phenomenology · Physics 2009-10-07 G. L. Fogli , E. Lisi , A. Marrone , D. Montanino , A. Palazzo , A. M. Rotunno

Axions with masses of order keV can be produced in great abundance within the Solar core. The majority of Sun-produced axions escape to infinity, but a small fraction of the flux is produced with speeds below the escape velocity. Over time,…

High Energy Physics - Phenomenology · Physics 2022-09-07 William DeRocco , Shalma Wegsman , Brian Grefenstette , Junwu Huang , Ken Van Tilburg

Motivated by a possible $\sim$ eV-mass solar axion explanation to excess events recently detected by the XENON1T experiment, I revisit and update cosmological constraints on axions in this mass range. I find that of the allowed XENON1T mass…

Cosmology and Nongalactic Astrophysics · Physics 2020-07-16 Marius Millea

We investigate the 5.49 MeV solar axions flux produced in the $p(d,\, ^{3}{\rm He})a$ reaction and analyze the potential to detect it with the forthcoming large underground neutrino oscillation experiment Jiangmen Underground Neutrino…

High Energy Physics - Phenomenology · Physics 2022-12-14 Giuseppe Lucente , Newton Nath , Francesco Capozzi , Maurizio Giannotti , Alessandro Mirizzi

A light pseudoscalar coupled to two photons would be copiously emitted by the core of a supernova. Part of this flux would be converted to $\gamma-$rays by the galactic magnetic field. Measurements on the SN1987A $\gamma-$ray flux by the…

Astrophysics · Physics 2009-10-28 J. A. Grifols , E. Masso , R. Toldra

We explore the physics potential of a terrestrial detector for observing axionic Kaluza-Klein excitations coming from the Sun within the context of higher-dimensional theories of low-scale quantum gravity. In these theories, the heavier…

High Energy Physics - Phenomenology · Physics 2009-10-31 L. Di Lella , A. Pilaftsis , G. Raffelt , K. Zioutas

We present the limits on photon to axionlike particle (ALP) coupling from the 10-year period observations of the TeV BL Lacertae blazar 1ES 1215+303 (with redshift $z=0.130$). The contemporaneous gamma-ray spectra are measured by the…

High Energy Astrophysical Phenomena · Physics 2024-02-14 Hai-Jun Li , Wei Chao , Yu-Feng Zhou

The axion-like particles $a$ can be produced in the Sun via the process of $p + D \to {}^3{\rm He} +a$, with mass up to 5.5 MeV. The photons in the subsequent decay $a \to \gamma\gamma$ can deviate significantly from the Sun, or even from…

High Energy Physics - Phenomenology · Physics 2026-04-21 Yu-Cheng Qiu , Yongchao Zhang

The light pseudoscalar particle, dubbed the axion, borne out of the Peccei-Quinn solution to the strong CP problem in QCD remains elusive. One avenue of inferring its existence is through its coupling to electromagnetic radiation. So far,…

High Energy Astrophysical Phenomena · Physics 2015-05-28 Ramandeep Gill , Jeremy S. Heyl

Recently, axion-like particle search has received renewed interest. In particular, several groups have started ``light shining through a wall'' experiments based on magnetic field and laser both continuous, which is very demanding in terms…

High Energy Physics - Experiment · Physics 2008-11-26 Cecile Robilliard , Remy Battesti , Mathilde Fouche , Julien Mauchain , Anne-Marie Sautivet , Francois Amiranoff , Carlo Rizzo
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