Questions tagged [particle-physics]
Particle physics is the study of the fundamental forces of nature as they are embodied in the interactions of elementary and composite particles at high energies and short time and distance scales. DO NOT USE THIS TAG for point particles in classical mechanics.
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What if gravity is actually repulsive, with its antiparticle state being magnetism, and is actually dark energy? [closed]
This is still in an early hypothesis, and I am not
a physicist so there's no need to try and refute this hypothesis with a bunch of word-salad. I am simply reaching out to gather thoughts and foster ...
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Theoretical Physics or Experimental Physics [closed]
We all know that physics research is primarily divided into experimental & theoretical physics (with phenomenology in between). According to you what you can suggest about the pros and cons of ...
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Spin of particles and bodies, is it in any way restricted i axis apart from being affected by gravity, electric fields
So I was trying to grasp how particles or dipoles travelling in space, rather the universe might be affected and whether the spin can be stopped/ varied by the fields they interact therewith. Also ...
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Can a hypothetically massless object/particle of finite size spin around its own center in a fixed position in space? [closed]
Imagine a hypothetically spinning massless object or particle of finite size. I am not referring to orbital spin but spinning around its own center like a flywheel spinning with a fixed center. This ...
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Frame dragging in a stream of particles with aligned spin
In theory, does an elementary particle, with intrinsic spin, induce an immeasurably tiny amount of frame-dragging?
Or is frame-dragging only a property of angular momentum for macroscopic objects? ...
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Questions about the Stern-Gerlach Experiment Implementation
I have watched this video many times in the hopes of better understanding the SGE and how it is used to conclude that Quantum Spin must be quantized. I have two questions:
During the experiment, 9:40,...
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Assuming that proton decay occurs, will all types of particles be dispersed without exception?
Proton decay is a theoretical possibility, as it is predicted to happen by some GUTs, so the proton may not be stable and could decay into lighter particles considering enormous time scales.
If proton ...
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Continuous Beam-Beam Collider Luminosity Calculation
I'm trying to do a calculation of a continuous beam-beam collider luminosity where the crossing occurs in a defined volume and the beams are defined by their current densities. But I am getting stuck ...
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How does an atom change in the presence of a large gravitational force?
Question / light thought experiment on atomic structure in the presence of a large gravitation force.
Background:
This is a general, conceptual question, not looking to solve any particular problem, ...
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What might cause excess counts in the first few bins of the histogram of muon decay times?
I did a measurement of atmospheric muons lifetime using a plastic scintillator, connected to a PMT with adjutable High voltage, a discriminator with a thershold voltage and an FPGA timer.
I was told ...
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Where can I find all channels from the photohadronic interaction $p + \gamma\rightarrow$ ...?
I would like to know all possible channels of the photohadronic interaction: $$p + \gamma\rightarrow a + b + c \dots $$
For example: $$p + \gamma \rightarrow\Delta^+\rightarrow\pi^0 + p.$$ Do you know ...
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How, exactly, would evidence of neutrinoless double beta decay prove (or disprove) $CP$-violation and/or lepton number violation? [closed]
I assume, 'naively', that evidence of neutrinoless double beta decay would imply non-violation of $CP$-symmetry, as well as non-violation of lepton number universality.
Also, is it possible our ...
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Comparison of production probabilities of delta baryon in pion-proton collisions
Currently studying Georgi's Lie Algebras in Particle Physics and problem 5.C in the isospin chapter asks to compare the probability of producing $\Delta^{++}$ in $\pi^+ P \rightarrow \Delta^{++}$ and $...
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Can dark matter around astronomical bodies like galaxies be explained by the Reissner-Nordstrom effect?
According to Reissner-Nordstrom solution to Einstein's gravitational field equations in astronomy the electric or magnetic or both, field of a charged body of mass generates its own gravitational ...
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Are protons and neutrons truly spherical and round like they are drawn? [duplicate]
I was watching a documentary "Visualizing the Proton: A Documentary" (link)
And this image of a proton popped up. So that got me my question.
Moreover, what about electrons and other ...
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