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Questions related to Elementary Particle Physics
Suppose a suitable energy is given to an electron in a shell, it will absorb energy and it jumps to the next orbit. Since it was highly unstable there, it will emit the energy as em radiation and...
09 September 2014 1,195 8 View
Hi all, I wanted a detailed explanation of why Rho meson is so very important in marking a Gamma gamma event.Or it would be great if someone could suggest me some papers related to this topic.
09 September 2014 8,589 6 View
It is well known, that the Standard Model has become one of the most successful physical theories so far. But the search for better theories is still going in, which is coined as Beyond Standard...
27 August 2014 7,408 11 View
We know that the Unified Field Theory is an elusive dream for theoretical physics. However, there were many proposals of UFT in the past. One interesting proposal is by M.J. Goodband, which he...
26 August 2014 6,052 21 View
08 August 2014 9,439 12 View
For a massless gluon case, pure QCD field strength is not gauge invariant because of self-interaction of gluons. But the pure QCD Lagrangian gives us gauge invariance and at the same time, gauge...
08 August 2014 2,334 7 View
08 August 2014 8,825 22 View
Albert Einstein coined the term "Unified Field Theory," which describes any attempt to unify the fundamental forces of physics between elementary particles into a single theoretical framework....
08 August 2014 2,108 22 View
Theoretically, can neutrinos interact, also weakly, with gamma rays? I know that neutrino has no charge but has mass and spin; perhaps there is another type of interaction. For example, if a...
08 August 2014 5,419 8 View
It is known that hadrons can be divided in baryons (fermions of three quarks) and mesons (bosons of two quarks). The sum of their electric charge is always an integer number, e.g. the proton is...
08 August 2014 4,803 71 View
For four fundamental interactions definitely it can be but I have a curiosity whether or not for possible fifth force. Highly appreciated for more clarity from someone who knows about it.
08 August 2014 7,323 1 View
05 August 2014 7,277 7 View
To formulate equations that can better describe the Feynman rules, we rewrite the Lagrangian that describes a particular field equation by choosing an arbitrary ground state of the vacuum. By...
07 July 2014 9,608 8 View
In Newtonian notion force between to masses m1 and m2 separated by a distance d is simply G m1 m2/d^2. This is an example of a theory which accepts action at a distance. A second example is...
17 June 2014 10,109 40 View
plasma is 4th state of matter.how to create plasma
06 June 2014 3,953 1 View
What is underneath the wave function? What is the wave function? We consider the wave function in configuration space. It is a probability amplitude distribution. Its squared modulus is a...
06 June 2014 6,244 61 View
There are a few basic parameters by which the cosmologists try to describe our universe. In classical cosmology the important ones are (i) Hubble parameter (ii) Density parameter (iii)...
06 June 2014 5,341 3 View
06 June 2014 1,435 41 View
Recently I met a term "nuclear matter" in some science fiction discussion. It is considered that macroscopic artificial things can be made of such a matter (not of just atoms), like, say, an armor...
05 May 2014 6,922 6 View
Dark matter doesn't interact with light.
05 May 2014 398 3 View
Recent observation of B mode polarizations encoded in CMB anisotropy has indicated the presence of primordial gravity waves. Do inflationary theories have a mechanism to produce primordial gravity...
05 May 2014 6,063 38 View
Neutrino-neutrino scattering is not considered for neutrino oscillation in vacuum. Neutrino scattering with e, p, n in matters is considered for neutrino oscillation in matters (e.g. in sun, in...
27 April 2014 7,654 6 View
04 April 2014 7,866 7 View
In a paper I saw that the spin-averaged mass (M_sa) related to the masses of vector (M_v) and pseudoscalar (M_p) mesons, and the relation is: M_sa=(M_p+3M_v)/4 I want to know what spin-average...
04 April 2014 1,197 2 View