Question

In: Physics

Right now, all of the "stuff" that has been created in the world is made of...

Right now, all of the "stuff" that has been created in the world is made of protons, electrons, and neutrons. I'm aware that particles other than these have much shorter lifetimes. But I've also heard that mixing particles in the same state can increase their lifetimes - the neutron, for example, has a half life of 15 minutes when it's alone, but is stable in an atom.

Could we make combinations of other particles that last for (at least) days at a time? The combination need not consist entirely of new* particles, it must just have at least one.

I am very interested in this subject, so ideally I'd like a concrete answer, not just a guess.

Solutions

Expert Solution

This is really just an extended comment on CuriousOne's answer.

You probably know that there are just a few elementary particles: six quarks, three electron-a-likes (electron, mu and tau), three neutrinos and various assorted bosons. All matter is made up from various combinations of these particles.

The problem is that the heavy particles decay into the light ones on short timescales. So top, bottom, charm and strange quarks end up as up and/or down quarks while tau and mu end up as electrons. So very quickly everything ends up as electrons and up and down quarks, which of course make protons and neutrons.

The energy difference between up and down quarks is relatively small, and indeed it's comparable to nuclear binding energies. That's why a neutron can be stable in a nucleus and unstable out of it, because the nuclear binding energy is large enough to stabilise the neutron. However in all other cases the energy difference between the different types of quarks is far larger than nuclear energies and (apart from some special cases - see below) there is no stabilising them. Likewise the energy differences between the electron, mu and tau are too large for the heavier particles to be stabilised by atomic binding energies.

I've skipped over the bosons because you can't make matter from bosons. Bosons don't obey the Pauli exclusion principle, and it's the exclusion principle that allows atoms to exist. If you attempted to make matter from bosons at best you just get a condensate.

I did say there we some special cases. Let me start with a known one: you can make matter from muons. Muonic hydrogen has been made, and so has a hydrogen analogue made from an anti-mu and electron. I thought the mu/anti-mu equivalent of hydrogen had been observed, but Wikipedia says not. Anyhow, these atoms last only until the mu decays. As mentioned above, the binding energies available are too small to stabilise the mu and prevent it decaying to an electron.

The other special case is still entirely theoretical. A neutron is stable because the nuclear binding energy is high enough to prevent the down quark to up quark decay, but nuclear energies aren't high enough to prevent for example a strange quark decaying. However it has been suggested that at exceedingly high pressures the strange quarks could be stabilised and form strange matter. Most of us regard these ideas as huge fun but rather unlikely.


Related Solutions

Now that the position, Administrative Assistant, has been created, you’ve taken the opportunity to create a...
Now that the position, Administrative Assistant, has been created, you’ve taken the opportunity to create a PowerPoint presentation to train new supervisors on how to conduct performance evaluations. Whether you use an annual evaluation, real-time feedback, or quarterly evaluations, it is important that new supervisors understand: the rationale for a performance evaluation in general, the rationale for the specific one in use, the instrument used, and the process for the evaluation. The PowerPoint presentation should be a minimum of 10...
Globalization is a hot topic in the world right now. Explain what it is. What are...
Globalization is a hot topic in the world right now. Explain what it is. What are the pros and cons and which side do you support and why?
Environmental awareness all over the world in recent years has created enormous challenges as well as...
Environmental awareness all over the world in recent years has created enormous challenges as well as ample opportunities for international marketers. Critically evaluate this emerging contemporary issue and analyze its impact for international marketers.
Right now many economies in the world are experiencing a downturn due to the Corona Virus....
Right now many economies in the world are experiencing a downturn due to the Corona Virus. a) What kind of fiscal policy can governments use to address the decline? b) What actions will be taken by the government in implementing the fiscal policy that you described in part a? c) What will be the effect on Aggregate Demand (if any) as a result of the actions taken in part b? d) What will be the effect on Aggregate Supply (if...
How is evolution affecting us/our world right now, as we speak?
How is evolution affecting us/our world right now, as we speak?
What immediate changes, if any, has Uber company made to its basic business model right now,...
What immediate changes, if any, has Uber company made to its basic business model right now, during the crisis of the Coronavirus. How are riders/customers being served during this crisis period ? Is Uber able to retain employees? What changes have been implemented for Uber company to continue to offer goods and services that's are a part of its brand? Or has there been an adjustment in goods and services offered?
It has been suggested that not all accounting choices are made by management in the best...
It has been suggested that not all accounting choices are made by management in the best interest of fair and consistent financial reporting. What are motivations can you think of for management's choice of accounting methods?
From the Early 1800's all the way until now, what has made Communism appealing to the...
From the Early 1800's all the way until now, what has made Communism appealing to the Chinese peasant?
75 million people died in World War 2 spread over 6 years. Right now in the...
75 million people died in World War 2 spread over 6 years. Right now in the World 13 000 people have died due to the pandemic. If the doubling time is 5 days (many people think it will decrease to 3 days) how long before the death toll will be greater than World War 2?
The changing world of the 21st century has created the need for defining and developing a...
The changing world of the 21st century has created the need for defining and developing a new breed of internationally capable manager’s?
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT