Results 101 to 110 of about 21,268 (194)

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

Cosmological solutions in generalized hybrid metric-Palatini gravity

, 2017
We construct exact solutions representing a Friedmann-Lema\^itre-Robsertson-Walker (FLRW) universe in a generalized hybrid metric-Palatini theory. By writing the gravitational action in a scalar-tensor representation, the new solutions are obtained by ...
Carloni, Sante, Lemos, José P. S., Lobo, Francisco S. N., Rosa, João L.   +3 more
core   +1 more source

Modified Gravity and Dark Energy models Beyond $w(z)$CDM Testable by LSST [PDF]

, 2019
One of the main science goals of the Large Synoptic Survey Telescope (LSST) is to uncover the nature of cosmic acceleration. In the base analysis, possible deviations from the Lambda-Cold-Dark-Matter ($\Lambda$CDM) background evolution will be probed by ...
Baker, Tessa, Blazek, Jonathan, Bull, Philip, Ferreira, Pedro G., Ishak, Mustapha, Leonard, C. Danielle, Lin, Weikang, Linder, Eric, Pardo, Kris, Pedersen, Eske M., Valogiannis, Georgios   +10 more
core   +1 more source

The cosmology of minimal varying Lambda theories

, 2019
Inserting a varying Lambda in Einstein's field equations can be made consistent with the Bianchi identities by allowing for torsion, without the need to add scalar field degrees of freedom.
Alexander, Stephon, Cortês, Marina, Liddle, Andrew R., Magueijo, João, Sims, Robert, Smolin, Lee   +5 more
core   +1 more source

Neutrinoless Double Beta Decay

, 2015
We review the potential to probe new physics with neutrinoless double beta decay $(A,Z) \to (A,Z+2) + 2 e^-$. Both the standard long-range light neutrino mechanism as well as short-range mechanisms mediated by heavy particles are discussed.
Päs, Heinrich, Rodejohann, Werner
core   +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

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

Bioinformation, 2022
Shapshak P.
europepmc   +1 more source

Pico-charged intermediate particles rescue dark matter interpretation of 511 keV signal

Journal of High Energy Physics, 2017
Various alleged indirect dark matter search signals, such as the 511 keV line from galaxy center or the PAMELA/AMS02 signal, are often challenged by the absence of corresponding signal from dwarf galaxies and/or by the absence of an impact on CMB through
Y. Farzan, M. Rajaee
doaj   +1 more source

Gravitational Equivalence Theorem and Double-Copy for Kaluza-Klein Graviton Scattering Amplitudes. [PDF]

Research (Wash D C), 2022
Hang YF, He HJ.
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