Results 91 to 100 of about 20,356 (164)

Can Dark Matter be an artifact of extended theories of gravity?

, 2016
In this article, we propose different background models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of genesis of dark matter without affecting the SM particle sector.
Choudhury, Sayantan, Sadhukhan, Soumya, Sen, Manibrata   +2 more
core   +1 more source

Audible axions

Journal of High Energy Physics, 2019
Conventional approaches to probing axions and axion-like particles (ALPs) typically rely on a coupling to photons. However, if this coupling is extremely weak, ALPs become invisible and are effectively decoupled from the Standard Model. Here we show that
Camila S. Machado, Wolfram Ratzinger, Pedro Schwaller, Ben A. Stefanek   +3 more
doaj   +1 more source

LHC-friendly minimal freeze-in models

Journal of High Energy Physics, 2019
We propose simple freeze-in models where the observed dark matter abundance is explained via the decay of an electrically charged and/or coloured parent particle into Feebly Interacting Massive Particles (FIMP).
G. Bélanger, N. Desai, A. Goudelis, J. Harz, A. Lessa, J. M. No, A. Pukhov, S. Sekmen, D. Sengupta, B. Zaldivar, J. Zurita   +10 more
doaj   +1 more source

New Light Species and the CMB

, 2013
We consider the effects of new light species on the Cosmic Microwave Background. In the massless limit, these effects can be parameterized in terms of a single number, the relativistic degrees of freedom.
Brust, Christopher, Kaplan, David E., Walters, Matthew T.   +2 more
core   +1 more source

Cosmological signatures of a mirror twin Higgs

Journal of High Energy Physics, 2018
We explore the cosmological signatures associated with the twin baryons, electrons, photons and neutrinos in the Mirror Twin Higgs framework. We consider a scenario in which the twin baryons constitute a subcomponent of dark matter, and the contribution ...
Zackaria Chacko, David Curtin, Michael Geller, Yuhsin Tsai   +3 more
doaj   +1 more source

Dark matter in Hidden Valley models with stable and unstable light dark mesons

Journal of High Energy Physics, 2019
It is a distinct possibility that a Hidden Valley sector would have a spectrum of light particles consisting of both stable and unstable dark mesons. The simultaneous presence of these two types of particles can lead to novel mechanisms for generating ...
Hugues Beauchesne, Enrico Bertuzzo, Giovanni Grilli di Cortona   +2 more
doaj   +1 more source

Detection of early-universe gravitational-wave signatures and fundamental physics. [PDF]

Gen Relativ Gravit, 2022
Caldwell R, Cui Y, Guo HK, Mandic V, Mariotti A, No JM, Ramsey-Musolf MJ, Sakellariadou M, Sinha K, Wang LT, White G, Zhao Y, An H, Bian L, Caprini C, Clesse S, Cline JM, Cusin G, Fornal B, Jinno R, Laurent B, Levi N, Lyu KF, Martinez M, Miller AL, Redigolo D, Scarlata C, Sevrin A, Haghi BSE, Shu J, Siemens X, Steer DA, Sundrum R, Tamarit C, Weir DJ, Xie KP, Yang FW, Zhou S.   +37 more
europepmc   +1 more source

Strongly self-interacting vector dark matter via freeze-in

Journal of High Energy Physics, 2018
We study a vector dark matter (VDM) model in which the dark sector couples to the Standard Model sector via a Higgs portal. If the portal coupling is small enough the VDM can be produced via the freeze-in mechanism.
Mateusz Duch, Bohdan Grzadkowski, Da Huang   +2 more
doaj   +1 more source

Neutrino communication, intergalactic transit, and Astrobiology. [PDF]

Bioinformation, 2022
Shapshak P.
europepmc   +1 more source

Gravitationally induced decoherence vs space-time diffusion: testing the quantum nature of gravity. [PDF]

Nat Commun, 2023
Oppenheim J, Sparaciari C, Šoda B, Weller-Davies Z.   +3 more
europepmc   +1 more source