The Standard Model of the Electroweak Interaction

1998 ◽  
pp. 305-342
Author(s):  
Quang Ho-Kim ◽  
Xuan-Yem Pham
Keyword(s):  
Standard Model ◽  
Electroweak Interaction ◽  
The Standard Model

RECENT RESULTS FROM LEP

1993 ◽  
Vol 08 (08) ◽  
pp. 675-695 ◽  
Author(s):  
GÜNTER QUAST
Keyword(s):  
Standard Model ◽  
Center Of Mass ◽  
Electroweak Interaction ◽  
Electron Positron ◽  
Main Emphasis ◽  
The Standard Model ◽  
Large Electron Positron ◽  
Integrated Luminosity

Recent results from the four experiments ALEPH, DELPHI, L3 and OPAL at the large electron-positron collider, LEP, at CERN are reviewed. Analyzes from an integrated luminosity of about 20 pb −1 per experiment, taken at different center-of-mass energies within ±3 GeV around the Z0 resonance, are available now. Here, the main emphasis is put on the relevance of these measurements for precision tests of the Standard Model of the electroweak interaction.

scholarly journals Extension of the standard model of electroweak interaction and Dark Matter in the tangent bundle geometry

2019 ◽  
Vol 79 (9) ◽  
Author(s):  
Joachim Herrmann
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Tangent Bundle ◽  
Electroweak Interaction ◽  
Fiber Axis ◽  
Beyond The Standard Model ◽  
Gauge Bosons ◽  
Quantum Numbers ◽  
The Standard Model ◽  
Vector Gauge

Abstract A generalized theory of electroweak interaction is developed based on the underlying geometrical structure of the tangent bundle with symmetries arising from transformations of tangent vectors along the fiber axis at a fixed spacetime point given by the SO(3,1) group. Electroweak interaction beyond the standard model (SM) is described by the little groups $$ SU(2)\otimes E^{c}(2)$$SU(2)⊗Ec(2) ($$E^{c}(2)$$Ec(2) is the central extended Euclidian group) which includes the group $$SU(2)\otimes U(1)$$SU(2)⊗U(1) as a limit case. In addition to isospin and hypercharge, two additional quantum numbers arise which explain the existence of families in the SM. The connection coefficients yield the SM gauge potentials but also hypothetical gauge bosons and other hypothetical particles as a Higgs family as well as candidate Dark Matter particles are predicted. Several important consequences for the interaction between dark fermions, dark scalars or dark vector gauge bosons with each other and with SM Higgs and Z-bosons are described.

NEUTRINOLESS DOUBLE BETA DECAY EXPERIMENTS

2019 ◽  
pp. 32-39
Author(s):  
N.S. Rumyantseva ◽  
K.N. Gusev
Keyword(s):  
Standard Model ◽  
Beta Decay ◽  
Electroweak Interaction ◽  
Neutrinoless Double Beta Decay ◽  
New Physics ◽  
Lepton Number ◽  
Double Beta Decay ◽  
The Standard Model ◽  
New Generation ◽  
Lepton Number Violating

Neutrinoless double beta decay is a lepton number violating process which is not allowed in the Standard Model (SM) of the electroweak interaction. The discovery of this process will be an unambiguous confirmation of the existence of New Physics outside the SM. At this moment many experiments are being conducted aimed at searching for neutrinoless double beta decay on various isotopes (76Ge, 136Xe, 130Te, 100Mo, etc.). The paper presents a brief overview of the results of some current projects, such as GERDA, MAJORANA, KamLAND-Zen, EXO-200, CUORE and SuperNEMO, and plans for creating a new generation experiments.

scholarly journals TAGGING THE S QUARK IN THE HADRONIC DECAYS OF THE Z

1995 ◽  
Vol 06 (04) ◽  
pp. 585-590 ◽  
Author(s):  
ALESSANDRO DE ANGELIS ◽  
GABRIELE COSMO ◽  
FABIO COSSUTTI
Keyword(s):  
Neural Network ◽  
Standard Model ◽  
Electroweak Interaction ◽  
Hadronic Decays ◽  
Feed Forward Neural Network ◽  
Poor Knowledge ◽  
The Poor ◽  
The Standard Model ◽  
Jet Fragmentation ◽  
Selection Of

The selection of samples of events enriched in hadronic decays of the Z into [Formula: see text] pairs is made difficult by the poor knowledge of jet fragmentation. A Feed-Forward Neural Network can help in maximizing the performance of the classification. This will offer the possibility to test the universality of the Standard Model of the electroweak interaction, and to perform measurements in the sector of nonperturbative QCD.

Indirect measurements in micro-space with the EM

1995 ◽  
Vol 53 ◽  
pp. 598-599
Author(s):  
Sterling P. Newberry
Keyword(s):  
Electron Microscope ◽  
Standard Model ◽  
Particle Physics ◽  
Information Storage ◽  
Storage Space ◽  
Indirect Measurements ◽  
Storage And Retrieval ◽  
Adequate Information ◽  
Compelling Reason ◽  
The Standard Model

At the 1958 meeting of our society, then known as EMSA, the author introduced the concept of microspace and suggested its use to provide adequate information storage space and the use of electron microscope techniques to provide storage and retrieval access. At this current meeting of MSA, he wishes to suggest an additional use of the power of the electron microscope.The author has been contemplating this new use for some time and would have suggested it in the EMSA fiftieth year commemorative volume, but for page limitations. There is compelling reason to put forth this suggestion today because problems have arisen in the “Standard Model” of particle physics and funds are being greatly reduced just as we need higher energy machines to resolve these problems. Therefore, any techniques which complement or augment what we can accomplish during this austerity period with the machines at hand is worth exploring.

An Interview with the Physicist that Her Head in the Universe and Both Feet on the Earth

2019 ◽  
Author(s):  
Adib Rifqi Setiawan
Keyword(s):  
Standard Model ◽  
Particle Physics ◽  
Space Time ◽  
Additional Dimension ◽  
The Earth ◽  
The Standard Model ◽  
The Universe

Put simply, Lisa Randall’s job is to figure out how the universe works, and what it’s made of. Her contributions to theoretical particle physics include two models of space-time that bear her name. The first Randall–Sundrum model addressed a problem with the Standard Model of the universe, and the second concerned the possibility of a warped additional dimension of space. In this work, we caught up with Randall to talk about why she chose a career in physics, where she finds inspiration, and what advice she’d offer budding physicists. This article has been edited for clarity. My favourite quote in this interview is, “Figure out what you enjoy, what your talents are, and what you’re most curious to learn about.” If you insterest in her work, you can contact her on Twitter @lirarandall.

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