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1
Massless Representations of the Poincaré Group: ...
Geometry through its fundamental transformations, the Poincaré group, requires that wavefunctions belong to representations.
(one helicity state), which we will call a KK scalar. The number of helicity states (
degrees of freedom) is conserved in this decomposition. The massless spectrum
is, thus, [g^A^k], (11.14) and its symmetries are the local version of symmetries of
...
3
Quantum Fields and Strings: A Course for Mathematicians
Chiral multiplet: A massless complex scalar 0 and a massless chiral spinor X- In
this case the story is analogous. The obtained massless representation has a
spinor and a complex scalar, so it has helicities 0,0 (for scalar) and -1/2,1/2 (for ...
Pierre Deligne, Institute for Advanced Study (Princeton, N.J.), 1999
4
Symmetry Principles Particle Physics
The only known massless particles are the photon and the neutrino and both of
these carry spin angular momentum. The most important feature of massless
particles for the present discussion is the following: a massless particle 'of spin s'
has ...
W. M. Gibson, B. R. Pollard, 1980
Thus for a massless particle, the two definitions would take the form oo x 0, which
is undefined and hence does not actually rule out the existence of particles with
m = 0. Evidently, relativistic mechanics has room for massless particles, always ...
6
Symmetry and Its Breaking in Quantum Field Theory
Schwinger Model (Massless QED2) QED in four dimensions cannot be solved in
an exact fashion. The simplest system of QED with electrons must be a
positronium which is an electron-positron bound state. However, this bound state
energy ...
7
What Every Engineer Should Know About Computational ...
5.3. Massless. degrees. of. freedom. So far our focus has been restricted to the
stiffness matrix. The mass matrix whose generation was shown in Chapter 3
usually has a large number of zero rows and columns. In industrial finite element
...
8
College Physics: Reasoning and Relationships
So far, we have assumed cables and ropes are massless, and we justified this
assumption with the claim that the mass of a realistic cable or rope is usually very
small compared with that of other parts of the system. Let's now see how to deal ...
9
A First Course in String Theory
Therefore, we get a massless scalar field for each direction normal to the Dp-
brane: a D p-brane has a massless scalar for each normal direction. (15.37)
These massless scalars have a physical interpretation. In Section 12.8 we
indicated that ...
10
Instantons in Gauge Theories
University of Washington, Seattle, Washington 98/95 (Received 6 October 1977)
The Green's functions for massless spinor and vector particles propagating in a
self-dual but otherwise arbitrary non-Abelian gauge Held are shown to be ...
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Massless particle discovery could radically accelerate electronics
Scientists have discovered the Weyl fermion. A particle theorized more than 85 years ago, it is claimed to be able to create completely massless ... «Gizmag, 七月 15»
Long-sought phenomenon finally detected
Image: Ling Lu and Qinghui Yan Part of a 1929 prediction by physicist Hermann Weyl—of a kind of massless particle that features a singular ... «R & D Magazine, 七月 15»
Evening Brief
Bangladesh-origin scientist Zahid Hasan, who is currently a Princeton professor of physics, has led a research team to discover massless ... «DhakaTribune, 七月 15»
Massless particle discovered 85 years after it was theorized
PRINCETON, N.J., July 17 (UPI) -- Researchers have discovered a massless particle, which was first theorized 85 years ago and thought to be ... «UPI.com, 七月 15»
Massless particle finally detected
For decades, physicists thought that the subatomic particles called neutrinos were, in fact, the massless particles that Weyl had predicted -- a ... «Daijiworld.com, 七月 15»
Weyl Points Observed for First Time
Part of a 1929 prediction by physicist Hermann Weyl — of a kind of massless particle that features a singular point in its energy spectrum called ... «Novus Light Technologies Today, 七月 15»
Weyl points: Long-sought phenomenon finally detected
Part of a 1929 prediction by physicist Hermann Weyl—of a kind of massless particle that features a singular point in its energy spectrum called ... «Phys.Org, 七月 15»
BETA CAE Releases ANSA, µETA v15.3.1
Abaqus: Applying Checks>Massless Nodes in Abaqus deck, when the model contained FASTENERS, could result in unexpected termination. «Ten Links, 七月 15»
The Fuzzball Fix for a Black Hole Paradox
String theory has a similar mechanism, said Warner, whereby massless fields provide the outward pressure instead of squashed electrons. «Wired, 六月 15»
What is the Higgs Boson?
It is, in a sense, the universal medium which separates massless particles into different masses. This is called symmetry breaking, and it's often ... «ExtremeTech, 六月 15»
