Results 61 to 70 of about 214,334 (339)

Quark-hadron duality violations and higher-order 1/m b corrections in inclusive semileptonic B decays

open access: yesJournal of High Energy Physics
The theoretical description and data for inclusive semileptonic B decays have reached incredible precision. This motivated us to re-animate the discussion of possible Quark-Hadron Duality violations.
Thomas Mannel   +3 more
doaj   +1 more source

Gravitational Waves in Einstein-Cartan Theory: On the Effects of Dark Matter Spin Tensor [PDF]

open access: green, 2022
E. Elizalde   +4 more
openalex   +1 more source

Limits on the anomalous speed of gravitational waves from binary pulsars

open access: yes, 2016
A large class of modified theories of gravity used as models for dark energy predict a propagation speed for gravitational waves which can differ from the speed of light.
Jiménez, Jose Beltrán   +2 more
core   +3 more sources

The Nature of Primordial Fluctuations from Anisotropic Inflation [PDF]

open access: yes, 2010
We study the statistical nature of primordial fluctuations from an anisotropic inflation which is realized by a vector field coupled to an inflaton. We find a suitable gauge, which we call the canonical gauge, for anisotropic inflation by generalizing ...
Kanno, Sugumi   +2 more
core   +1 more source

Soft Robotic Snake with Tunable Undulatory Gait for Efficient Underwater Locomotion

open access: yesAdvanced Robotics Research, EarlyView.
This study designs an underwater soft snake robot using 3D‐printed soft actuators, controlled by specific signals to generate sinusoidal undulation. Results show a positive correlation between speed and swing amplitude, with optimal performance at 2/3π phase offset, PLA tail, 1.2 voltage growth rate, and 6s undulation period achieving a maximum speed ...
Huichen Ma, Junjie Zhou, Raye Yeow
wiley   +1 more source

Constraining |V cs | and physics beyond the Standard Model from exclusive (semi)leptonic charm decays

open access: yesJournal of High Energy Physics
We study the available data on exclusive leptonic and semileptonic c → sℓ + ν decays within the Standard Model and beyond. Our analysis accounts for theory correlations between the relevant hadronic matrix elements through application of dispersive ...
Carolina Bolognani   +3 more
doaj   +1 more source

Exploring String Axions with Gravitational Waves

open access: yesGalaxies, 2017
We explore the string axion dark matter with gravitational waves in Chern–Simons gravity. We show that the parametric resonance of gravitational waves occurs due to the axion coherent oscillation.
Jiro Soda, Daiske Yoshida
doaj   +1 more source

Implication of pulsar timing array experiments on cosmological gravitational wave detection

open access: yesAAPPS Bulletin, 2021
Gravitational waves provide a new probe of the Universe which can reveal a number of cosmological and astrophysical phenomena that cannot be observed by electromagnetic waves.
Jun’ichi Yokoyama
doaj   +1 more source

Does a Nambu-Goto wall emit gravitational waves? -- Cylindrical Nambu-Goto wall as an example of gravitating non-spherical walls --

open access: yes, 2002
Gravitational field of a cylindrical Nambu-Goto wall in the vacuum spacetime is considered in order to clarify the interaction between Nambu-Goto membranes and gravitational waves.
Nakamura, Kouji
core   +1 more source

Hard‐Magnetic Soft Millirobots in Underactuated Systems

open access: yesAdvanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang   +4 more
wiley   +1 more source

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