First axion results from the XENON100 experiment

Abstract

First axion results from the XENON100 experimentAprile, E.; et al., [Unknown]; Alfonsi, M.; Colijn, A.P.; Decowski, M.P. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. We present the first results of searches for axions and axionlike particles with the XENON100 experiment. The axion-electron coupling constant, g Ae , has been probed by exploiting the axioelectric effect in liquid xenon. A profile likelihood analysis of 224.6 live days × 34-kg exposure has shown no evidence for a signal. By rejecting g Ae larger than 7.7 × 10 −12 (90% C.L.) in the solar axion search, we set the best limit to date on this coupling. In the frame of the DFSZ and KSVZ models, we exclude QCD axions heavier than 0.3 and 80 eV=c 2 , respectively. For axionlike particles, under the assumption that they constitute the whole abundance of dark matter in our galaxy, we constrain g Ae to be lower than 1 × 10 −12 (90% C.L.) for masses between 5 and 10 keV=c 2 .

ALPs effective field theory and collider signatures

“…[42][43][44][45][46][47][48][49][50][51][52][53]), including as well their impact at colliders for the case f a ∼ O(TeV) [35,36]. Additionally, constraints on the linear coupling of the ALP to W ± gauge bosons have recently been obtained in Refs.…”

“…Lighter ALPs have been tested in axion searches in Xenon100 [52] through the axio-electric effect in liquid xenon (analogue of the photo-electric process with the absorption of an axion instead of a photon), bounding ALP couplings to electrons:…”

Decoherence in Excited Atoms by Low-Energy Scattering

“…We assumed that Dark Matter is thermalized by the background radiation (T = 2.726 • K) and that it is composed of Axions, with a mass of m p = 1 eV/c 2 and a cross-section of σ = 0.01 barn [25,26]. For experimental observation, all axion-electron interactions can be excluded, as they will result in excitation or even ionization of the atom [27,28]. The decoherence by massive particle scattering is observed to be more prominent than for photon scattering in both cases.…”

“…Atoms 2016, 4,28 Author Contributions: The authors have contributed equally to the formulation of the theory and the calculations where performed by Diego A. Quiñones. Both authors have read and approved the final manuscript.…”

Search for WIMP inelastic scattering off xenon nuclei with XENON100

“…A 4 cm thick liquid xenon (LXe) layer surrounds the TPC and is monitored by 64 1-inch square PMTs, providing an effective active veto for further background reduction. XENON100 has acquired science data between 2009-2015, and has set competitive constraints on spinindependent [8,9] and spin-dependent [9,10] elastic WIMP-nucleus scatters, on solar axions and galactic ALPs [11], as well as on leptophilic dark matter models [12][13][14].…”