scholarly journals Searches for heavy resonances and new particles at ATLAS

2013 ◽  
Author(s):  
Sarah Heim ◽  
ATLAS Collaboration
Keyword(s):  
Heavy Resonances ◽  
New Particles

New Particles

2018 ◽  
Author(s):  
Roger H. Stuewer
Keyword(s):  
Gamma Rays ◽  
Atomic Hydrogen ◽  
Nuclear Physics ◽  
Hydrogen Isotope ◽  
Alpha Particles ◽  
Cloud Chamber ◽  
Ernest Rutherford ◽  
James Chadwick ◽  
Theoretical Foundations ◽  
New Particles

In December 1931, Harold Urey discovered deuterium (and its nucleus, the deuteron) by spectroscopically detecting the faint companion lines in the Balmer spectrum of atomic hydrogen that were produced by the heavy hydrogen isotope. In February 1932, James Chadwick, stimulated by the claim of the wife-and-husband team of Irène Curie and Frédéric Joliot that polonium alpha particles cause the emission of energetic gamma rays from beryllium, proved experimentally that not gamma rays but neutrons are emitted, thereby discovering the particle whose existence had been predicted a dozen years earlier by Chadwick’s mentor, Ernest Rutherford. In August 1932, Carl Anderson took a cloud-chamber photograph of a positron traversing a lead plate, unaware that Paul Dirac had predicted the existence of the anti-electron in 1931. These three new particles, the deuteron, neutron, and positron, were immediately incorporated into the experimental and theoretical foundations of nuclear physics.

scholarly journals Search for New Particles Decaying tobb¯inpp¯Collisions at√s=1.8TeV

1999 ◽  
Vol 82 (10) ◽  
pp. 2038-2043 ◽  
Author(s):  
F. Abe ◽  
H. Akimoto ◽  
A. Akopian ◽  
M. G. Albrow ◽  
A. Amadon ◽  
...  
Keyword(s):  
New Particles

Particle Size, Structure and Powdering Process of Calcium Carbonate Nanoparticles Filled Powdered Styrene-Butadiene Rubber

2011 ◽  
Vol 415-417 ◽  
pp. 237-242
Author(s):  
Zhou Da Zhang ◽  
Xue Mei Chen ◽  
Guo Liang Qu
Keyword(s):  
Particle Size ◽  
Calcium Carbonate ◽  
Size Structure ◽  
Average Diameter ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Particle Structure ◽  
Styrene Butadiene ◽  
New Particles

Calcium carbonate nanoparticles (nano-CaCO3) filled powdered styrene-butadiene rubber (P(SBR/CaCO3) was prepared by adding nano-CaCO3 particles, encapsulant and coagulant to styrene-butadiene rubber (SBR) latex by coacervation, and the particle size distribution, structure were studied. Scanning electron microscopy (SEM) was used to investigate the (P(SBR/CaCO3) particle structure, and a powdering model was proposed to describe the powdering process. The process includes: (i) the latex particles associated with the dispersed nano-CaCO3 particles (adsorption process) to form “new particles” and (ii) the formation of P(SBR/CaCO3) by coagulating “new particles”. The SEM results also shown that the nano-CaCO3 and rubber matrix have formed a macroscopic homogenization in the (P(SBR/CaCO3) particles and nano-CaCO3 dispersed uniformly in the rubber matrix with an average diameter of approximately 50 nm.

scholarly journals On the photochemical production of new particles in the coastal boundary layer

1999 ◽  
Vol 26 (12) ◽  
pp. 1707-1710 ◽  
Author(s):  
Colin O'Dowd ◽  
Gordon McFiggans ◽  
David J. Creasey ◽  
Liisa Pirjola ◽  
Claudia Hoell ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Photochemical Production ◽  
Coastal Boundary Layer ◽  
Coastal Boundary ◽  
New Particles

scholarly journals Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks

2017 ◽  
Vol 768 ◽  
pp. 137-162 ◽  
Author(s):  
V. Khachatryan ◽  
A.M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
E. Asilar ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Vector Boson ◽  
Final States ◽  
B Quarks ◽  
Heavy Resonances ◽  
Charged Leptons

Characteristic Aspects of Formation of New Particles during the Growth of Monosize Silica Seeds

1996 ◽  
Vol 180 (1) ◽  
pp. 237-241 ◽  
Author(s):  
Sheng-Li Chen ◽  
Peng Dong ◽  
Guang-Hua Yang ◽  
Jiu-Jin Yang
Keyword(s):  
New Particles

New particles spring to life in two-dimensional electron gases

Physics World ◽  
1995 ◽  
Vol 8 (11) ◽  
pp. 23-24
Author(s):  
Peter Main ◽  
Laurence Eaves
Keyword(s):  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases ◽  
New Particles

scholarly journals Dimethylamine and ammonia measurements with ion chromatography during the CLOUD4 campaign

2012 ◽  
Vol 5 (9) ◽  
pp. 2161-2167 ◽  
Author(s):  
A. P. Praplan ◽  
F. Bianchi ◽  
J. Dommen ◽  
U. Baltensperger
Keyword(s):  
Cosmic Rays ◽  
Sulphuric Acid ◽  
Ion Chromatography ◽  
Galactic Cosmic Rays ◽  
Cloud Chamber ◽  
Sampling Efficiency ◽  
Environmental Chamber ◽  
Mixing Ratios ◽  
Sampling Line ◽  
New Particles

Abstract. The CLOUD project investigates the influence of galactic cosmic rays on the nucleation of new particles in an environmental chamber at CERN. Dimethylamine (DMA) was injected intentionally into the CLOUD chamber to reach atmospherically relevant levels away from sources (up to 100 pptv) in order to study its effect on nucleation with sulphuric acid and water at 278 K. Quantification of DMA and also background ammonia (NH3) was performed with ion chromatography (IC). The IC method used together with the sampling line developed for CLOUD in order to measure NH3 and DMA at low pptv levels is described; the overall sampling efficiency of the method is discussed; and, finally, mixing ratios of NH3 and DMA measured during CLOUD4 are reported.

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