Post- or pre-scriptum (added on 22 October 2023): I did what I promised to do below, and that is to analyze SLAC’s E144 experiment in detail. We do so in a recently added new chapter in this series of Lectures: Lecture XI – Can Matter Be Made Out of Light? We warmly recommend reading the paper, because it is extremely relevant when it comes to understanding the basic hypotheses of modern quantum physics. 🙂
I am rather surprised – and not, at the same time – that my paper on matter-antimatter pair production is getting a fair number of downloads (about 4500 downloads now) – despite my rather free-wheeling (scathing?) language. It basically argues the experiments ‘proving’ the 1934 Breit-Wheeler hypothesis, do not prove much at all! Worse, I actually claim they are not proving anything at all, and that the charge that comes out of these experiments can be explained by looking at the reactions as a nuclear process (there is always a nucleus nearby, with neutrons that can provide the charged particle pairs that come out of the reaction).
I disengaged from further research because of a lack of time, but it is probably the one and only aspect of the new physics that I want to examine further. Why? Because it will either prove or disprove my rather classical interpretation of quantum physics. Indeed, with all due respect to Gregory Breit and John Archibald Wheeler – neither of which got a Nobel Prize in Physics – I think the Breit-Wheeler hypothesis (matter formation – pair production – can be formed out of interacting light particles) remains unproven. In my not-so-humble view, it is based on an erroneous interpretation of Einstein’s mass-energy equivalence relation. Mass is energy, of course, but this equivalence must be rooted in an interpretation of mass as charge in motion, and dig back into de Broglie’s original hypothesis:
“We may, thus, conceive that, because of some grand law of Nature, a periodic phenomenon of frequency ν0 would be associated with each energy packet with rest mass m0, such that hν0 = m0c2. The frequency ν0 is, of course, to be measured, in the rest frame of the energy packet. This hypothesis is the basis of our theory: it is, just like all hypotheses, worth only as much as the consequences that can be deduced from it.”[1]
As we explain in our most downloaded paper, the de Broglie frequency is the orbital frequency of the positive or negative charge inside a proton or an electron, respectively (or, in the neutron, the neutral combination of both):
- Photons are photons: traveling fields (think of them as a force without a charge to act upon).
- Matter-particles are matter-particles: charge in motion. Fields do not convert into charge, or vice versa: the charge must already be there.
We will do our best to rewrite this paper in a more academic version by studying the E-144 articles and papers when we have time. We could not access them because they are – mostly – in a PS format. This may sound like a poor excuse.[2] It is. However, we also noted this:
- Wikipedia authors cornering interesting topics (including the Zitterbewegung interpretation of quantum mechanics) are usually biased towards presenting hypotheses as facts. On the Breit-Wheeler process, the article is remarkably nuanced. It dryly quotes from a 2016 article in Physics Review E [3] that, although “direct production of electron–positron pairs in two-photon collisions, the Breit–Wheeler process, is one of the basic processes in the universe” – we very much doubt this, as should be clear from this paper – “it has never been directly observed in the laboratory.”
- While the referenced Physics Review E article says this is “because of the absence of intense enough γ-ray sources”, we stick to our intuition and think there is more at play: we effectively concur with the more skeptical voices in this more recent (2021) ScienceNews appraisal[4]: as long as this experiment cannot be performed with “indisputably real photons”, we think of matter-light conversions not only as not being real, but as being logically (or, should we say, ontologically?) impossible.
The fact that the Particle Data Group has close to zero information on Breit-Wheeler processes confirms all of the above – in our not-so-humble view again, at least. We believe in Wheeler’s mass-without-mass vision, but not in his mass-without-charge (or charge-without-charge) ideas!
[1] Translated from the de Broglie’s Recherches sur la Théorie des Quanta (Ann. de Phys., 10e série, t. III (Janvier-Février 1925: « On peut donc concevoir que par suite d’une grande loi de la Nature, à chaque morceau d’énergie de masse propre m0, soit lié un phénomène périodique de fréquence ν0 telle que l’on ait : hν0 = m0c2, ν0 étant mesurée, bien entendu, dans le système lié au morceau d’énergie. Cette hypothèse est la base de notre système : elle vaut, comme toutes les hypothèses, ce que valent les conséquences qu’on en peut déduire. »
[2] A professional Adobe Acrobat subscription – which I do not have right now – should make them readable, right? However, we note the site has not been updated since 1998, so this does not inspire much confidence: have there been no replications of these experiments since then? Apparently not. 
[3] Admittedly, Physics Review E is, apparently, not a prime journal in particle physics. The Wikipedia entry on it notes that its focus is on many-body phenomena, although its “broad scope” also includes “quantum chaos, soft matter physics, classical chaos, biological physics and granular materials.”
[4] The overview is – admittedly – ‘journalistic’ only (that is the nature of ScienceReview), but we think it offers a more objective assessment of the current state of play in regard to this line of research.
Reading Feynman 