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Article
Astronomy & Astrophysics
C. P. Burgess et al.
Summary: We present a class of 4D 'yoga' models in which the gravitational response of heavy-particle vacuum energies is strongly suppressed. These models utilize a relaxation mechanism driven by a scalar field, non-linearly realized supersymmetric gravity coupled to the Standard Model, and approximate scale invariance expressed through a low-energy dilaton supermultiplet. The combination of these elements dramatically reduces the net vacuum-energy density. The models have implications for the electroweak hierarchy, Dark Energy, and Dark Matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Mudit Jain
Summary: This paper discusses solitons in bosonic field theories with self-interactions and gravity, and their properties. Depending on various parameters, such as mass and gauge coupling constant, these solitons can have different sizes, masses, and intrinsic spins. The existence of these solitons, even with small gauge couplings, can have significant implications for astrophysics and phenomenology.
Article
Astronomy & Astrophysics
Konstantinos Koutrolikos
Summary: A new description of free massless superfields of arbitrary superspin Y is proposed, where some properties of higher spin prepotentials are relaxed and first and half order invariants are constructed. Additional auxiliary superfields are used to restore the degrees of freedom.
Article
Astronomy & Astrophysics
Hong-Yi Zhang et al.
Summary: This paper demonstrates the existence of vector oscillons in the low-energy effective theory of an interacting massive vector field. Two types of vector oscillons are provided, with vanishing orbital angular momentum and approximately spherically symmetric energy density.
Article
Astronomy & Astrophysics
Mudit Jain et al.
Summary: We first introduce the effective nonrelativistic theory of gravitationally interacting, massive integer-spin fields and derive the corresponding equations of motion. Then, we construct a set of gravitationally supported solitons by using polarized plane waves, which have extremal polarization and large spin but no orbital angular momentum. These solitons can be used to generate partially polarized solitons.
Article
Physics, Particles & Fields
D. Baxter et al.
Summary: The paper proposes recommendations for presenting dark matter direct detection results, particularly for weak-scale dark matter searches, and provides a series of recommendations on applying the Profile Likelihood Ratio method to direct detection data. Additionally, updated recommendations for astrophysical parameters and relevant neutrino fluxes are provided.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Edward W. Kolb et al.
Summary: The gravitino swampland conjecture expands the scope of effective field theories, proposing that the gravitino sound speed must be nonvanishing. This conjecture has important implications for both theories and observations, and is supported by scenarios for moduli stabilization in string theory.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Adam Falkowski et al.
Summary: The study applies on-shell amplitude techniques to the domain of dark matter, defining an effective theory for a massive spin-S particle without invoking fields and Lagrangians. This simplifies the study of theories with higher-spin dark matter particles and provides an efficient way to calculate the rates of processes controlling dark matter production. The methods are demonstrated by exploring scenarios where higher-spin dark matter is produced via the freeze-in mechanism.
Article
Astronomy & Astrophysics
Stephon Alexander et al.
Summary: Limited knowledge exists about dark matter, but researchers are exploring the theory of higher spin fields to explain its origin and properties. They suggest that the gravitational production of superheavy bosonic higher spin fields during inflation could account for the dark matter we observe today, with potential distinctive signatures in directional direct detection.
Article
Astronomy & Astrophysics
Edward W. Kolb et al.
Summary: The study focuses on gravitational particle production of the massive spin-3/2 Rarita-Schwinger field and its close relative, the gravitino, in Friedmann-Robertson-Walker cosmological spacetimes. It reveals a catastrophic gravitational particle production due to a transient vanishing of the helicity-1/2 gravitino sound speed for masses lighter than the Hubble expansion rate after inflation. The research suggests a breakdown of effective field theory and proposes the gravitino swampland conjecture, indicating a possible link to the swampland program.
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Astronomy & Astrophysics
I. L. Buchbinder et al.
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Astronomy & Astrophysics
S. James Gates et al.
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Astronomy & Astrophysics
Katsuki Aoki et al.
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Astronomy & Astrophysics
Riccardo Catena et al.
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Astronomy & Astrophysics
Luca Marzola et al.
Article
Astronomy & Astrophysics
Ioseph L. Buchbinder et al.
Article
Astronomy & Astrophysics
Chia-Feng Chang et al.
Review
Physics, Multidisciplinary
F. Mayet et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2016)
Article
Astronomy & Astrophysics
J. Asorey et al.
Article
Physics, Multidisciplinary
Xavier Bekaert et al.
REVIEWS OF MODERN PHYSICS
(2012)
Article
Astronomy & Astrophysics
Chi-Ting Chiang et al.
PHYSICS OF THE DARK UNIVERSE
(2012)
Article
Astronomy & Astrophysics
Xingang Chen et al.
