Electron is the source of electric field and changing electric field produce magnetic force, what about particle that can do vice versa? My concern is how come universe favors particles that carry electric charge but not magnetic charge? What prevailing theory can explain this discrepancies?
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1$\begingroup$ I'm voting to close this question as off-topic because it shows insufficient prior research. In particular, have you checked Wikipedia? $\endgroup$– Emilio PisantyCommented Dec 17, 2018 at 13:19
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2$\begingroup$ Possible duplicate of What is the explanation of the non-existence of magnetic monopoles? $\endgroup$– John RennieCommented Dec 17, 2018 at 17:00
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1$\begingroup$ Also Why do physicists believe that there exist magnetic monopoles? $\endgroup$– John RennieCommented Dec 17, 2018 at 17:01
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1$\begingroup$ Also related Does existence of magnetic monopole break covariant form of Maxwell’s equations for potentials? $\endgroup$– John RennieCommented Dec 17, 2018 at 17:02
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2 Answers
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There is no overriding reason why magnetic charges (monopoles) do not seem to exist. It is straightforward to supplement the known laws of classical electrodynamics with magnetic as well as electric point sources. Moreover, in quantum electrodynamics, the existence of magnetic monopoles would actually solve a known problem, since the presence of magnetic charges would require electric charges to be quantized. As a result, physicists have spent a significant amount of effort searching for isolated magnetic sources.
However, they have never been found. It seems that our universe may simply have electric charges but no magnetic charges, for no deep underlying reason that we know of. The most we can say is that if there are magnetic monopoles that we have not yet seen, the reason is probably that they are very heavy. In many extended theories of particle interactions, there are monopoles, but the monopoles have masses much larger than the masses of the electrically charged particles. They are therefore difficult to produce, except in incredibly energetic interactions or in the early universe, when the temperature was very high.
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1$\begingroup$ It is not straightforward to include magnetic monopoles at all. For example, minimal coupling will have to modified. Also all magnetic fields are due to current loops, although elementary particle magnetic dipole fields are usually excluded from this. You cannot split a current loop into monopoles. $\endgroup$– my2ctsCommented Dec 17, 2018 at 19:49
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Electron is the source of electric field and changing electric field produce magnetic force...
The electron is the source of an electric field and the electron is the source of a magnetic dipole moment. Both are for a free electron intrinsic (existing independent from sourrounding influences) properties.
Our observations shows that a particle with two monopolar properties - an electric charge and a magnetic charge not exist. The search of magnetic monopoles is possible only on high energy physics and scales below the subatomic particles. The use of such investigations should be a deeper understanding of the electrons inner structure and the structure of electric and magnetic fields and of photons.
Why can't a particle that carries magnetic charge exist?
Electric fields are the reason for accelerations towards or away from other electric charges. Magnetic fields are the reason for deflection of charges. What should be the reaction of a magnetic monopole to the influence of another magnetic monopol? The same as for electric charges? How then we would differ between them? Why not agree that charges contain a monopolar field and a dipole field?
answered Dec 17, 2018 at 18:13
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$\begingroup$ Alpha particles have nonzero charge and vanishing magnetic dipole moment. But beyond that, magnetic dipole moments are completely unrelated to what's being asked, and nothing here is actually an answer. $\endgroup$ Commented Dec 17, 2018 at 22:42
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$\begingroup$ @EmilioPisanty Ignoring or neglecting the magnetic dipole moment of charges is a lost chance to get more insights of EM interactions and the atomic structure. As I said before, give me an inconsistency and not killing argument, that it is not teached this way. $\endgroup$ Commented Dec 19, 2018 at 5:00
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$\begingroup$ The only reason why you have the impression that the magnetic dipole moment of fundamental particles is ignored in mainstream physics is that you go out of your way to ignore the parts of mainstream physics that calculate those effects. They have been explicitly pointed out to you multiple times in this site. It's high time for you to stop blaming mainstream physics for your lack of initiative in filling in the gaps in your training. $\endgroup$ Commented Dec 19, 2018 at 6:03
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$\begingroup$ @Emilio This again is a killing argument and not a discussion about inconsistencies. I never studied physics as the main study, so I’m not trained in your sense. So come on and give me a chance. $\endgroup$ Commented Dec 19, 2018 at 6:52