Results 61 to 70 of about 207,815 (342)

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

Beyond Conventional Cooling: Advanced Micro/Nanostructures for Managing Extreme Heat Flux

open access: yesAdvanced Materials, EarlyView.
This review examines the design, application, and manufacturing of biomimetic or engineered micro/nanostructures for managing high heat‐flux in multi‐level electronics by enhancing conductive, convective, phase‐changing, and radiative heat transfer mechanisms, highlighting their potential for efficient, targeted thermal management, and future prospects.
Yuankun Zhang   +7 more
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

Gravitational Waves

open access: yes, 2007
50 pages, 13 figures; to appear in the Proceedings of Les Houches Summer School, Particle Physics and Cosmology: The Fabric of Spacetime, Les Houches, France, 31 Jul - 25 Aug ...
openaire   +3 more sources

Light‐Activated Micromotors in Air Propelled by Thermal Convection

open access: yesAdvanced Materials, EarlyView.
Near‐infrared‐driven micromotors in air can overcome gravity and generate convective motion by a light‐induced thermal mechanism driven by a temperature gradient in the air caused by the interaction of the gold nanoparticles present on the surface of ZnO and NIR irradiation.
Pedro Mena‐Giraldo   +6 more
wiley   +1 more source

Anatomy of non-leptonic two-body decays of charmed mesons into final states with η′

open access: yesJournal of High Energy Physics
We show that D → Pη′ decay amplitudes, where P = K, π, η, cannot be simply related to their D → Pη counterparts with a single η 0–η 8 mixing angle. We propose a novel, consistent treatment of η 0–η 8 mixing for application in D → Pη and D → Pη′ decays ...
Carolina Bolognani   +3 more
doaj   +1 more source

Revisiting stochastic gravitational wave background in the strong signal case

open access: yesResults in Physics
Weak-signal limit is often used in estimating stochastic gravitational-wave background (SGWB) intensities. This approximation fails and the signal-to-noise ratio (SNR) can be much weaker when background signals are loud compared to the detector noise. In
Zheng-Cheng Liang   +4 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

A method to measure a relative transverse velocity of source-lens-observer system using gravitational lensing of gravitational waves

open access: yes, 2009
Gravitational waves propagate along null geodesics like light rays in the geometrical optics approximation, and they may have a chance to suffer from gravitational lensing by intervening objects, as is the case for electromagnetic waves.
A. R. Thompson   +5 more
core   +1 more source

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