Recent content by Adrian59

This is an extract from my letter of resignation from the forum: My belief is that physics has taken a wrong turn, and what passes as science is nothing more than speculation without hard evidence. As a challenger to the accepted paradigms, I can understand how I have ruffled a few feathers...

I am not sure which assumptions you are referring to. The graph is between cross section and mass. Presumably dark matter particle have mass. I presume they would need some cross section to have any hope of detection. If the cosmology community are going to give up on that this leads into an...

But, this still means that strong CP violation is hypothetical.

This is a typical binary response from supporters of the standard model of cosmology: if it's not them its us. As an example: consider galaxy rotation curves. The problem is using a simplistic version of Newton's law of gravity which works fine for our solar system with only eight significant...

Which facts are you referring to: did the LZ experiment find dark matter or has the LHC found dark matter?

Yes, but the LSND and MiniBoone anomalies were attributed to the possibility of sterile neutrinos (I have rechecked the original papers). So the MicroBoone results by ruling this out as an explanation, severely curtailed or even removed the evidence for sterile neutrinos. Unless there is another...

That is true up to a point. However, as the great philosopher of science, Karl Popper said in his book 'The Logic of Scientific Discovery' (Ref. Popper, K. (1959) though my copy is published by Routledge, New York) 'no conclusive disproof of a theory can ever be produced'. So where do we draw...

Of course not, but that doesn't alter anything, still no dark matter. Now you mention axions, has anyone proved strong CP violation because as far as I can see axions are a hypothetical fix to a hypothetical problem. Well the theoretical space on the cross section versus mass graph doesn't...

The second half of 2024 has seen the results from 3 years of data from the Lux Zeplin experiment in South Dakota, USA. Despite their attempts to put a positive spin on this, the bottom line is - no dark matter. Just three months before that the ATLAS experiment from CERN in Geneva, Switzerland...

Did you find my notes helpful, or are you asking for something more in depth?

My understanding is that a virtual particle is never detected on its own, as it is involved with the transmission of a force, so it is absorbed by the destination particle. As it is not detected it is deemed virtual. Of course the force carriers for the electromagnetic and weak forces have been...

Below are my notes from a first course in quantum computing. I have more but like the first reply to your request I am not sure what level you are at. I could be well below yours! Quantum Information: Science and Technology Introduction: Information is physical; storing information requires a...

Not exactly, One can read the one loop calculation in any serious QFT textbook. I was asking a general question, but using Laporta and Remeddi's paper as an example, as you referenced this paper. Non of the more advance papers are very transparent. Laporta and Remeddi's eighteen integrals are...

I do have a copy of this paper, but I can't see what the authors are doing. They clearly are using a dimensional renormalization parameter ω where the number of dimensions (n) = 4 - 2ω (note other authors use 4 - ε). ω goes to zero in the limit, so most of their integral equations I 1-18 will...

Does anyone know how to calculate the coefficients for higher order (sixth and beyond) terms for the electron anomalous magnetic moment? I have a clear understanding of calculating the Schwinger term, but beyond that I cannot find anything in the usual QFT textbooks. The usual papers often...