A Short-Range Force

Search for a Spin-Dependent Short-Range Force

The existence of possible short-range forces related to unpolarized and polarized particles has attracted the attention of physicists for decades. These forces provide a possible new source for the parity (P ) and time reversal (T ) symmetry violation. Moody and Wilczek [1] proposed that a macroscopic force with an interaction range from cm to μm can couple to scalar and pseudoscalar vertices t...

Short-range force detection using optically cooled levitated microspheres.

We propose an experiment using optically trapped and cooled dielectric micro-spheres for the detection of short-range forces. The center-of-mass motion of a microsphere trapped in vacuum can experience extremely low dissipation and quality factors of 10(12), leading to yoctonewton force sensitivity. Trapping the sphere in an optical field enables positioning at less than 1 μm from a surface, a ...

Description of intermediate- and short-range NN nuclear force within a covariant effective field theory

The present paper is aimed to developing an effective field theory in the GeV region to describe consistently both elastic and inelastic NN -scattering in a fully covariant way. In this development we employ our novel s-channel mechanism of NN -interaction at intermediate and short ranges assuming a formation of the sixquark bag dressed with basic meson fields such as π, σ, ρ and ω in the inter...

General Model for Treating Short-Range Electrostatic Penetration in a Molecular Mechanics Force Field

Classical molecular mechanics force fields typically model interatomic electrostatic interactions with point charges or multipole expansions, which can fail for atoms in close contact due to the lack of a description of penetration effects between their electron clouds. These short-range penetration effects can be significant and are essential for accurate modeling of intermolecular interaction...

N Load balance for non - bonded force Load balance pairlist and long - range force Compute pairlist and long range force Exchange long - range force force N