Results 101 to 110 of about 3,284,594 (357)
Direct and Indirect Probes for Composite Dark Matter
Frontiers in Physics, 2019 Dark matter candidates are one of the profound signatures of new physics, reflecting existence of new stable particles. If such particles are charged they can bind with ordinary electrons, forming anomalous isotopes.
Maxim Y. Khlopov +2 more
doaj +1 more source
Massless Elementary Particles in a Quantum Theory Over a Galois Field [PDF]
Theor. Math. Phys. Vol. 138 (2004) 208-225, 2002 We consider massless elementary particles in a quantum theory based on a Galois field (GFQT). We previously showed that the theory has a new symmetry between particles and antiparticles, which has no analogue in the standard approach. We now prove that the symmetry is compatible with all operators describing massless particles.
arxiv
Penning traps as a versatile tool for precise experiments in fundamental physics
, 2009 This review article describes the trapping of charged particles. The main principles of electromagnetic confinement of various species from elementary particles to heavy atoms are briefly described.
Altarelli G. +13 more
core +1 more source
The Elementary Particle Cube [PDF]
arXiv, 2017 Postulating that spacetime is discrete, we assume that physical space is described by a 3-dimensional cubic lattice.The corresponding symmetry group of rotations has order 24 and motivates the introduction of a cubic shaped graph with 27 vertices and 351 edges.
arxiv
Journal of Applied Clinical Medical Physics, EarlyView.Abstract This study aimed to evaluate the dose‐exposure reduction effect of a crystalline lens with a bismuth eye shield using cone‐beam computed tomography (CBCT) for head image‐guided radiation therapy. The ocular surface dose of the head phantom (THRA‐1) is defined as a crystalline lens exposure dose and is measured using a radiophotoluminescence ...
Tatsuya Yoshida +5 more
wiley +1 more source
On a non-CP-violating electric dipole moment of elementary particles [PDF]
arXiv, 1994 A description of elementary particles should be based on irreducible representations of the Poincar\'e group. In the theory of massive representations of the full Poincar\'e group there are essentially four different cases. One of them corresponds to the ordinary Dirac theory. The extension of Dirac theory to the remaining three cases makes it possible
arxiv
Physics of Elementary Particles
Nature, 1959 By J. D. Jackson London : Oxford University Press. Pp. ix + 135. Price 30s. This book is an introductory account of the physics of elementary particles, and is intended for graduate students and physicists who have a background of quantum mechanics.
G. Rochester
semanticscholar +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract The thermoluminescence dosimeter (TLD) sheet is a measurement device coated with manganese‐doped LiB3O5 in sheet form. The sheet is 0.2‐mm thick and flexible. Hence, it can fit and be installed on irregular surfaces. The current study aimed to evaluate the feasibility of measuring patient surface doses during radiation therapy using TLD sheets.
Yuya Miyasaka +8 more
wiley +1 more source
On the Problem of Gauge-Invariancy and Divergence in the Theory of Elementary Particles, I [PDF]
, 1950 H. Umezawa, R. Kawabe
openalex +2 more sources
Evaluation of the effect of metal stents on dose perturbation in the carbon beam irradiation field
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Propose Carbon ion therapy is indicated for cases in which stents have been inserted, such as bile ducts, but the effect of metal stents on carbon ion therapy is unclear. In this study, the dose perturbation of carbon ion therapy caused by metallic bile duct stents was evaluated by dosimetry. Materials and methods Five different types of metal
Yuya Miyasaka +8 more
wiley +1 more source