1,913 research outputs found
Searches for physics beyond the standard model at the LHC
At the Large Hadron Collider (LHC) at the European Organization for Nuclear
Research (CERN), protons and heavy ions are accelerated to velocities close to
the speed of light and collided in order to study particle interactions and
give us an insight to the fundamental laws of nature. The energy and intensity
of the particle beams at the LHC are unprecedented, and a tremendous amount of
data is collected by three experiments on the circular ring of the LHC that are
specialized in proton-proton collisions. The data confirm the most successful
theory of particle physics to date known as the standard model of particle
physics to very good precision, including the long expected and recently
discovered Higgs boson. The standard model cannot, however, accommodate
experimentally observed phenomena like gravity, neutrino masses, and dark
matter. The theory can also be theoretically unsatisfying as a result of
parameters that go unexplained, such as the relatively low value of the Higgs
mass despite its large quantum corrections, implying a lack of understanding.
For this reason, in addition to precision measurements of standard model
observables, experiments search for new physics beyond the standard model that
could explain some of the shortcomings of the standard model. A selection of
results for searches for new physics beyond the standard model using data
recorded by three experiments on the LHC are presented in this talk.Comment: 7 pages, 20 figures. Contribution to the proceedings of the first
African Conference on Fundamental Physics and Applications 2018, Namibia.
Publication can be found at
http://aphysrev.ictp.it/index.php/aphysrev/article/view/1608/58
Endings
Postcard from Jory Gibson, during the Linfield College Year Abroad Program at the Center for Cross-Cultural Study in Seville, Spai
Like Sand through the Hour Glass . . .
Postcard from Jory Gibson, during the Linfield College Year Abroad Program at the Universidad de Alicante, Spai
Development program for a 200 kW, technological processes in space
Dimensionless conservation equations, are presented and the theoretical basis of fluid behavior aboard orbiting satellites are reviewed with application to the processes of manufacturing crystals in weightlessness. The small amount of gravitational acceleration is shown to increase the separation of bands of varying concentration. Natural convection is shown to have no practical effect on crystallization from realistic conductions of weightlessness. The effects of surface tension become increasingly large, and suggestions are made for further research
Which Sustainable Software Practices Do Scientists Find Most Useful?
We studied scientists who attended two-day workshops on basic software skills
to determine which tools and practices they found most useful. Our pre- and
post-workshop surveys showed increases in self-reported familiarity, while our
interviews showed that participants found learning Python more useful than
learning the Unix shell, that they found pointers to further resources very
valuable, and that background material---the "why" behind the skills---was also
very valuable
On the Phase-Space Distribution of Bloch Eigenmodes for Periodic Point Scatterers
Consider the 3-dimensional Laplacian with a potential described by point
scatterers placed on the integer lattice. We prove that for Floquet-Bloch modes
with fixed quasi-momentum satisfying a certain Diophantine condition, there is
a subsequence of eigenvalues of positive density whose eigenfunctions exhibit
equidistribution in position space and localisation in momentum space. This
result complements the result of Uebersch\"{a}r and Kurlberg who show momentum
localisation for zero quasi-momentum in 2-dimensions, and is the first result
in this direction in 3-dimensions.Comment: 16 pages, 2 figure
Limit theorems for skew translations
Bufetov, Bufetov-Forni and Bufetov-Solomyak have recently proved limit
theorems for translation flows, horocycle flows and tiling flows, respectively.
We present here analogous results for skew translations of a torus.Comment: 12 pages, 2 figure
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