Results 131 to 140 of about 202,532 (277)
Self-tuning of the cosmological constant in brane-worlds with $P(X,ϕ)$ [PDF]
, 2022 Osmin Lacombe, Shinji Mukohyama
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The cosmological constant (Λ) problem represents a profound inconsistency at the foundationof modern theoretical physics. In this paper, we propose a phenomenological model wherein Λis not a fixed value but rather a dynamic quantity, interpreted as the effective potential energy ofa scalar field coupled to the expansion of the universe.
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International Journal of Art &Design Education, EarlyView.Abstract This paper explores how ‘what matters’ can surface in multisensory arts‐informed projects as ways for young people to survive and stay with gender and sexuality troubles that are always more than theirs. Situated in an ex‐mining post‐industrial locale, we make an agential cut in a longitudinal research and engagement project called Unboxing ...
EJ Renold
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Noble gases and nitrogen in material from asteroid Bennu
Meteoritics &Planetary Science, EarlyView.Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty +7 more
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Decaying Cosmological Constant and the Choice of a Conformal Frame [PDF]
, 1999 Yasunori Fujii
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Meteoritics &Planetary Science, EarlyView.Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews +5 more
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Rational Ruijsenaars-Schneider model with cosmological constant
Journal of High Energy PhysicsThe Ruijsenaars-Schneider models are integrable dynamical realizations of the Poincaré group in 1 + 1 dimensions, which reduce to the Calogero and Sutherland systems in the nonrelativistic limit.
Anton Galajinsky
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A possible solution to the Hubble constant discrepancy: Cosmology where the local volume expansion is driven by the domain average density [PDF]
, 2019 Masumi Kasai, Toshifumi Futamase
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Small but mighty: Impact hazards from iron Near‐Earth Objects
Meteoritics &Planetary Science, EarlyView.Abstract Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in
Robert Luther +5 more
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Image of Kerr–de Sitter black holes illuminated by equatorial thin accretion disks
European Physical Journal C: Particles and FieldsTo explore the influence of the cosmological constant on black hole images, we have developed a comprehensive analytical method for simulating images of Kerr–de Sitter black holes illuminated by equatorial thin accretion disks. Through the application of
Ke Wang, Chao-Jun Feng, Towe Wang
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