Are Massless Charged Particles Forbidden by Current Group Theory Theories?

FunkyDwarf
Messages
481
Reaction score
0
Hey guys

Just to clarify: there's nothing in current theories that forbids massless charged particles right? Its just we haven't found one yet. Do any of the group theory theories predict them or forbid them?(like the ones using the E8 group etc)

Thanks
-Graeme
 
Physics news on Phys.org
FunkyDwarf said:
Hey guys

Just to clarify: there's nothing in current theories that forbids massless charged particles right? Its just we haven't found one yet. Do any of the group theory theories predict them or forbid them?(like the ones using the E8 group etc)

Thanks
-Graeme

If massless electrically charge particles existed, we already would have observed certain processes, but we haven't. See

https://www.physicsforums.com/showthread.php?t=276535.
 
danke.
 
I started reading a National Geographic article related to the Big Bang. It starts these statements: Gazing up at the stars at night, it’s easy to imagine that space goes on forever. But cosmologists know that the universe actually has limits. First, their best models indicate that space and time had a beginning, a subatomic point called a singularity. This point of intense heat and density rapidly ballooned outward. My first reaction was that this is a layman's approximation to...
Thread 'Dirac's integral for the energy-momentum of the gravitational field'
See Dirac's brief treatment of the energy-momentum pseudo-tensor in the attached picture. Dirac is presumably integrating eq. (31.2) over the 4D "hypercylinder" defined by ##T_1 \le x^0 \le T_2## and ##\mathbf{|x|} \le R##, where ##R## is sufficiently large to include all the matter-energy fields in the system. Then \begin{align} 0 &= \int_V \left[ ({t_\mu}^\nu + T_\mu^\nu)\sqrt{-g}\, \right]_{,\nu} d^4 x = \int_{\partial V} ({t_\mu}^\nu + T_\mu^\nu)\sqrt{-g} \, dS_\nu \nonumber\\ &= \left(...
In Philippe G. Ciarlet's book 'An introduction to differential geometry', He gives the integrability conditions of the differential equations like this: $$ \partial_{i} F_{lj}=L^p_{ij} F_{lp},\,\,\,F_{ij}(x_0)=F^0_{ij}. $$ The integrability conditions for the existence of a global solution ##F_{lj}## is: $$ R^i_{jkl}\equiv\partial_k L^i_{jl}-\partial_l L^i_{jk}+L^h_{jl} L^i_{hk}-L^h_{jk} L^i_{hl}=0 $$ Then from the equation: $$\nabla_b e_a= \Gamma^c_{ab} e_c$$ Using cartesian basis ## e_I...

Similar threads

Back
Top