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 is the purpose of the MUon proton Scattering Experiment (MUSE)?
What is the purpose of the MUon proton Scattering Experiment (MUSE)? We know that when two protons collide together in a accelerator, convert to 4 muon ultimately (each proton decays to two muon)so is ...
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Energy to produce particles in different frames
I am a fourth year undergraduate student taking a course in Nuclear and Particle physics.
When asked nuclear related questions like "how much energy is produced [in the LAB frame] in the decay $X ...
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How LEptons in Muonium are INteracting with Gravity? (LEMING-Experiment, Soter et al.)
How LEptons in Muonium are INteracting with Gravity? (LEMING experiment, Soter et al.)
I have read an article from the Physical Society Zurich, Switzerland about Prof. Dr. Anna Sótér planned LEMING ...
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Did we interpret particles as excitation of fields because photons were interpreted as excitation of EM field? Was it an argument of symmetry?
When we discovered that light wave could behave as particles, we said particles then too should have wave aspects; which was the wave particle duality and it is about a symmetry of nature.
How much ...
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Is flavor a charge? Is there a field associated with flavor?
In QCD, Hadrons and mesons are composed of individual particle-like excitations called quarks, that assemble in pairs and triplets of zero net color charge.
Recent questions have partially addressed ...
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How are $t$ and $u$ channel processses different? [duplicate]
I do not understand how the diagrams for t and u channel processes given on wikipedia are different, and why it is meaningful to list them. Below are the two processes I reference:
It seems to me ...
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Does Haag's theorem lack dynamics?
It is stated that when the degrees of freedom of the Hilbert space in terms of which quantum mechanics is formulated becomes infinite, the unitary equivalence that is ensured by the Stone-von Neumann ...
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Examples of non-smooth interacting systems: Can motion of a particle be activated/deactivated by the presence/absence of surrounding particles?
Are there any physical situations of interacting particle systems in which the motion of individual particles can be activated and deactivated in response to the presence or absence of surrounding ...
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Are the 11 Standard Model vertices derivable from the lagrangian alone?
The fundamental particle interactions are often graphically enumerated as so.
Is it possible to show that all these interactions, and/or no others, follow directly from the standard model lagrangian? ...
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Different trends of thermalization in a collision of electron-ion
I performed a collision of electron-ion with using initial tmeperature of electron as $T_{e0}=$ 20 eV, ion as $T_{i0}=$ 10 eV and distributing with Maxwellian distribution of velocity. The density of ...
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How can a scalar particle be differentiated, experimentally, from a vector particle? How can we tell?
For a theoretical particle, especially one that does not interact via the electromagnetic force, how can we tell, physically, whether it has a spin or not?
Or, perhaps, what that spin is?
How is spin (...
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Can a particle have a mass greater than that of Higgs's boson's? [closed]
Up till now in our particle physics course, the most massive particle we've seen so far is Higgs's boson's. My question is, is there any restriction that doesn't allow particles to have greater mass? ...
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Why is there more matter than antimatter in the universe?
Even if we assume that the electron, due to its negative charge, is an antimatter particle, why did matter as we know it form from protons, neutrons, and electrons, and not from antiprotons, ...
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Confinement energy scale and boosts
Imagine a reference system where a certain proton is standing still in front of us. We measure its energy and we realize it's very low, so that the strong coupling constant $\alpha_s$ is pretty high ...
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What is Resonance localized at a bound neutron energy level?
Please see the article [1]. In Table 4, the first 2 energies are negative, meaning resonance from a bound state. what does resonance from a bound state mean physically? How to visualize it.
[1]: https:...
