Roberto Pavani's latest activity
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Roberto Pavani replied to the thread Graduate α as angular rigidity of the electron: references?.You're right that ##\alpha## appears everywhere in EM, so the question needs sharper motivation. Here it is: The Schwinger result... -
Roberto Pavani replied to the thread Graduate α as angular rigidity of the electron: references?.Sure. More specifically: ##\alpha = e^2/(4\pi\varepsilon_0,\hbar c)## can be rewritten as the ratio of the electron's self-field energy...
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Roberto Pavani posted the thread Graduate α as angular rigidity of the electron: references? in Quantum Physics.The fine-structure constant α appears whenever the electron resists forced reorientation by an external field: - Anomalous moment...
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Roberto Pavani replied to the thread Graduate Electron mass without B-field: best precision?.Thank you mfb. The idea of combining a direct charge measurement with hydrogen spectroscopy is a useful pointer. I'll look into what...
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Roberto Pavani reacted to mfb's post in the thread Graduate Electron mass without B-field: best precision? with
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Linacs need to know that ratio to work, but they might not measure and publish that ratio as we already have way more precise... -
Roberto Pavani posted the thread Graduate Electron mass without B-field: best precision? in Electromagnetism.The CODATA value of ##e/m_e## comes from Penning-trap cyclotron frequency measurements (strong ##B## field). Are there any competitive...
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Roberto Pavani replied to the thread High School A question about special relativity.A.T. gave an excellent answer in post #2, but perhaps the original question was even simpler than we made it: if a clock moves fast...
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Roberto Pavani reacted to A.T.'s post in the thread High School A question about special relativity with Like.
It should be noted that no matter what the axis of the local motion in the rocket is, over an entire local motion cycle it is slowed by...
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Roberto Pavani reacted to ohwilleke's post in the thread Undergrad New muon g-2 calculation consistent with experiment with Like.
The updated BMW calculation of the hadronic vacuum polarization contribution to the muon anomalous magnetic moment aμ in the Standard...
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Roberto Pavani replied to the thread Graduate Magnetic monopole vs (g-2).Thank you @renormalize, that's exactly the reference I was looking for. The Vento & Lacroix paper confirms that virtual...
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Roberto Pavani reacted to renormalize's post in the thread Graduate Magnetic monopole vs (g-2) with Like.
Closed loops of virtual low-mass magnetic monopoles would modify the QED prediction of ##g-2## for the electron and muon. @Roberto...
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While working on a preprint, I noticed what seems to be a straightforward logical chain that I haven't seen stated explicitly in the...
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Roberto Pavani replied to the thread Graduate Is Energy conservation among sectors (EM,GR,QM) a principle?.After some further research, I think I found one possible answer to my own question: Chamseddine & Connes (2007/2008). They derive the...
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Roberto Pavani replied to the thread Graduate Is Energy conservation among sectors (EM,GR,QM) a principle?.For those interested, the programmes I had in mind are: emergent spacetime (Barceló, Liberati, Visser), twistor theory (Penrose)...
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Roberto Pavani replied to the thread Graduate Is Energy conservation among sectors (EM,GR,QM) a principle?.@Dale Your questions about the interaction terms are exactly my point: "Is it true that actions are simply added across sectors?"...