Investigation of the nature of a massive vector mediator for dark matter through e + e − collisions

2021 ◽  
Author(s):  
Marcio Mateus Jr ◽  
Gustavo Gil da Silveira
Keyword(s):  
Dark Matter ◽  
Massive Vector

scholarly journals Removing instability of inflation in Polonyi–Starobinsky supergravity by adding FI term

2018 ◽  
Vol 33 (05) ◽  
pp. 1850032 ◽  
Author(s):  
Yermek Aldabergenov ◽  
Sergei V. Ketov
Keyword(s):  
Dark Matter ◽  
Supersymmetry Breaking ◽  
Massive Vector ◽  
Explicit Realization

Polonyi–Starobinsky (PS) supergravity is the [Formula: see text] supergravity model of Starobinsky inflation with spontaneous supersymmetry breaking (after inflation) due to Polonyi superfield, and inflaton belonging to a massive vector supermultiplet. The PS model is used for an explicit realization of the (super-heavy) gravitino dark matter scenario in cosmology. We find a potential instability in this model, and offer a mechanism for its removal by adding a Fayet–Iliopoulos (FI) term.

scholarly journals Dark Photon Search with PADME at LNF

2018 ◽  
Vol 46 ◽  
pp. 1860047
Author(s):  
Gabriele Piperno
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Effective Charge ◽  
Vector Boson ◽  
Charged Particles ◽  
Massive Vector ◽  
Dark Photon ◽  
The Standard Model

Dark Matter elusiveness could be explained by speculating that it lives in a separate sector with respect to the Standard Model and that interacts with it only by means of messengers. The simplest model foresees just one messenger: a, possibly massive, vector boson given by a new U(1) symmetry. This mediator can faintly mix with the photon and, hence, interact with SM charged particles, seeing an effective charge equal to [Formula: see text], with [Formula: see text] SM charge. The PADME experiment, hosted at Laboratori Nazionali di Frascati, is designed to search for such kind of particle, looking for its production in [Formula: see text] annihilations. Exploiting the DA[Formula: see text]NE linac, the collaboration aims to collect [Formula: see text] positrons on target by the end of 2018, reaching a sensitivity of [Formula: see text] for masses up to [Formula: see text][Formula: see text]Mev.

scholarly journals Completely dark photons from gravitational particle production during the inflationary era

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Edward W. Kolb ◽  
Andrew J. Long
Keyword(s):  
Dark Matter ◽  
Vector Field ◽  
Standard Model ◽  
Particle Production ◽  
Number Density ◽  
Massive Vector ◽  
Detailed Consideration ◽  
Electron Volt ◽  
Dark Photon ◽  
Wide Range

Abstract Starting with the de Broglie-Proca Lagrangian for a massive vector field, we calculate the number density of particles resulting from gravitational particle production (GPP) during inflation, with detailed consideration to the evolution of the number density through the reheating. We find plausible scenarios for the production of dark-photon dark matter of mass in a wide range, as low as a micro-electron volt to 1014 GeV. Gravitational particle production does not depend on any coupling of the dark photon to standard-model particles.

Existence of RNA 'dark matter' in doubt

Nature ◽  
2010 ◽  
Author(s):  
Melissa Lee Phillips
Keyword(s):  
Dark Matter
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