Academic Appointments

Additional Info

All Publications

  • New Constraints on Dark Photon Dark Matter with Superconducting Nanowire Detectors in an Optical Haloscope. Physical review letters Chiles, J., Charaev, I., Lasenby, R., Baryakhtar, M., Huang, J., Roshko, A., Burton, G., Colangelo, M., Van Tilburg, K., Arvanitaki, A., Nam, S. W., Berggren, K. K. 2022; 128 (23): 231802

    Abstract

    Uncovering the nature of dark matter is one of the most important goals of particle physics. Light bosonic particles, such as the dark photon, are well-motivated candidates: they are generally long-lived, weakly interacting, and naturally produced in the early universe. In this work, we report on Light A^{'} Multilayer Periodic Optical SNSPD Target, a proof-of-concept experiment searching for dark photon dark matter in the eV mass range, via coherent absorption in a multilayer dielectric haloscope. Using a superconducting nanowire single-photon detector (SNSPD), we achieve efficient photon detection with a dark count rate of 6*10^{-6}counts/s. We find no evidence for dark photon dark matter in the mass range of 0.7-0.8eV with kinetic mixing epsilon≳10^{-12}, improving existing limits in epsilon by up to a factor of 2. With future improvements to SNSPDs, our architecture could probe significant new parameter space for dark photon and axion dark matter in the meV to 10eV mass range.

    View details for DOI 10.1103/PhysRevLett.128.231802

    View details for PubMedID 35749181

  • Dark matter-electron scattering in materials: Sum rules and heterostructures PHYSICAL REVIEW D Lasenby, R., Prabhu, A. 2022; 105 (9)

    View details for DOI 10.1103/PhysRevD.105.095009

    View details for Web of Science ID 000807713500005

  • Dark matter scattering in astrophysical media: collective effects JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS DeRocco, W., Galanis, M., Lasenby, R. 2022: 1-59

    View details for DOI 10.1088/1475-7516/2022/05/015

    View details for Web of Science ID 000798184200001

  • Dark photons in the solar basin PHYSICAL REVIEW D Lasenby, R., Tilburg, K. 2021; 104 (2)

    View details for DOI 10.1103/PhysRevD.104.023020

    View details for Web of Science ID 000677556000003

  • Parametrics of electromagnetic searches for axion dark matter PHYSICAL REVIEW D Lasenby, R. 2021; 103 (7)

    View details for DOI 10.1103/PhysRevD.103.075007

    View details for Web of Science ID 000648573700002

  • Black hole superradiance of self-interacting scalar fields PHYSICAL REVIEW D Baryakhtar, M., Galanis, M., Lasenby, R., Simon, O. 2021; 103 (9)

    View details for DOI 10.1103/PhysRevD.103.095019

  • Long range dark matter self-interactions and plasma instabilities JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS Lasenby, R. 2020

    View details for DOI 10.1088/1475-7516/2020/11/034

    View details for Web of Science ID 000590148800035

  • Microwave cavity searches for low-frequency axion dark matter PHYSICAL REVIEW D Lasenby, R. 2020; 102 (1)

    View details for DOI 10.1103/PhysRevD.102.015008

    View details for Web of Science ID 000548059800006

  • Light vectors coupled to bosonic currents PHYSICAL REVIEW D Dror, J. A., Lasenby, R., Pospelov, M. 2019; 99 (5)

    View details for DOI 10.1103/PhysRevD.99.055016

    View details for Web of Science ID 000461058500010

  • Black hole mergers and the QCD axion at Advanced LIGO PHYSICAL REVIEW D Arvanitaki, A., Baryakhtar, M., Dimopoulos, S., Dubovsky, S., Lasenby, R. 2017; 95 (4)

    View details for DOI 10.1103/PhysRevD.95.043001

    View details for Web of Science ID 000393512400001

  • Black hole superradiance signatures of ultralight vectors Physical Review D Baryakhtar, M., Lasenby, R., Teo, M. 2017

    View details for DOI 10.1103/PhysRevD.96.035019

  • Twin Higgs WIMP dark matter PHYSICAL REVIEW D Garcia, I., Lasenby, R., March-Russell, J. 2015; 92 (5)

    View details for DOI 10.1103/PhysRevD.92.055034

    View details for Web of Science ID 000362088900004

  • Twin Higgs Asymmetric Dark Matter PHYSICAL REVIEW LETTERS Garcia, I., Lasenby, R., March-Russell, J. 2015; 115 (12): 121801

    Abstract

    We study asymmetric dark matter (ADM) in the context of the minimal (fraternal) twin Higgs solution to the little hierarchy problem, with a twin sector with gauged SU(3)^{'}×SU(2)^{'}, a twin Higgs doublet, and only third-generation twin fermions. Naturalness requires the QCD^{'} scale Λ_{QCD}^{'}≃0.5-20  GeV, and that t^{'} is heavy. We focus on the light b^{'} quark regime, m_{b^{'}}≲Λ_{QCD}^{'}, where QCD^{'} is characterized by a single scale Λ_{QCD}^{'} with no light pions. A twin baryon number asymmetry leads to a successful dark matter (DM) candidate: the spin-3/2 twin baryon, Δ^{'}∼b^{'}b^{'}b^{'}, with a dynamically determined mass (∼5Λ_{QCD}^{'}) in the preferred range for the DM-to-baryon ratio Ω_{DM}/Ω_{baryon}≃5. Gauging the U(1)^{'} group leads to twin atoms (Δ^{'}-τ^{'}[over ¯] bound states) that are successful ADM candidates in significant regions of parameter space, sometimes with observable changes to DM halo properties. Direct detection signatures satisfy current bounds, at times modified by dark form factors.

    View details for PubMedID 26430985

  • Signatures of large composite Dark Matter states JOURNAL OF HIGH ENERGY PHYSICS Hardy, E., Lasenby, R., March-Russell, J., West, S. M. 2015

    View details for DOI 10.1007/JHEP07(2015)133

    View details for Web of Science ID 000363512800003

  • Big Bang synthesis of nuclear dark matter JOURNAL OF HIGH ENERGY PHYSICS Hardy, E., Lasenby, R., March-Russell, J., West, S. M. 2015

    View details for DOI 10.1007/JHEP06(2015)011

    View details for Web of Science ID 000358312400002

https://orcid.org/0000-0002-7864-9702