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Abidal Sala
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Do physicists know exactly how many types of quarks exist? does this allow them to predict some particles should exist like Higgs Boson?
Wow, I would think they would be extremely unstable. Any models to suggest decay times on such things?mfb said:If you ask scientists directly involved in the searches or some theoretic physicists working in this area, they will probably tell you that chances are good to find a 4th generation.
But apart from that, I think the usual expectation is that there are just 3 generations. The Z decays are very convincing. 3 neutrino generations in the range of meV and a 4th generation heavier by at least 12 orders of magnitude?
I would say "problably not".
mfb said:If you ask scientists directly involved in the searches or some theoretic physicists working in this area, they will probably tell you that chances are good to find a 4th generation.
It is based on my observation that scientists working in area X tend to be confident to measure something interesting in area X - at least more confident than others. That is nothing wrong, and it does not imply causality in any direction. It is just something you should keep in mind if a theoretician tells you "my model is the best and LHC will confirm it".Vanadium 50 said:Where do you get this?
Why? What would prevent it decaying into a lower generation particle, given that we know the charged weak current mixes generations?mfb said:...A 4th-generation neutrino would be stable, as long as it is lighter than the 4th-generation equivalent of the electron.
mfb said:I don't know how neutrino mixing would look like...
Quarks are elementary particles that make up protons and neutrons, which are the building blocks of all matter.
Currently, there are 6 known types of quarks: up, down, charm, strange, top, and bottom. These types are also known as flavors.
Scientists have used various experiments, such as particle accelerators, to study the behavior and interactions of particles. Through these experiments, they have observed the behavior of quarks and their interactions with other particles, leading to the understanding and confirmation of their existence.
No, quarks cannot exist as isolated particles. They are always found in groups of two or three within larger particles such as protons and neutrons.
Currently, there are no other types of quarks predicted by the Standard Model of particle physics. However, some theories suggest the existence of additional types of quarks, such as the hypothetical "strange quark" and "top quark". These theories are still being studied and researched by scientists.