A Conversation for The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Peer Review: A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 1

Baryonic Being - save GuideML out of a word-processor: A7720562

Entry: The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles. - A2271205
Author: Baryonic Being - U234603

Hello. Please read and review this new entry of mine, bearing in mind the following issues:

Most of the 'Nature of Particles' section is copied from my other article about Hyperons (A1315856) but is crucial for beginner's to understand the basic concepts.

Is the title too long?

Should the table at the end be colour-coded in some way?

Thank you!


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 2

Apollyon - Grammar Fascist

Nah, I think the title is just the right length, not so sure about the colour coding. Anyway, I liked this entry, found it very readable and informative, there's just one bit of nit-picking I have to do...

In the section on Electron Volts, you say "I should say a word about the unit called the Electron Volt" For some reason, you're not allowed to use the word 'I' in edited entries, so you'll have to change it to "A word should be said about the unit called the Electron Volt" or something. However, this is to do with the guide rather than the entry, which I say again, is extremely good. smiley - smileysmiley - biggrin


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 3

Z

smiley - wow this is an excellent entry.. smiley - biggrin again the only thing that I can pick up on is the small piece of first person. This is because the guide is written in third person tense - which makes it more authorative and factual..

Good entry, and that's just nickpicking.

smiley - cheers


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 4

Baryonic Being - save GuideML out of a word-processor: A7720562

Thank you very much. I have altered the first person use accordingly.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 5

Ekaterin

I hope you don't mind if I nitpick your article:

In the last sentence under "The Nature of Particles", "Coulomb" should have a capital C because the unit is named after a person.

As I said when commenting on your other article, a Planck unit is 1.05 * 10^-34 Js (include the units).

When you list the flavours of quark, the word 'strange' is in quotes but none of the other words are - any particular reason for this.

A 100-watt lightbulb requires 100 Joules every second, which is

100 / (1.602 * 10^-19 * 10^6) MeV = 6.24 * 10^14 MeV.

The bit about pushing a human through an electric field doesn't make sense to me. It's because the electron is charged that it takes energy to push it through the electric field, and a human presumably has zero electric charge.

I think you are using the word "trillion" in the American sense (10^12) and not the UK sense (10^18) - perhaps you should clarify this. There's also an occurence of the word "billion" that may need clarifying.

Under "How to Build a Kaon" presumably the charge on the meson is 1.602 * 10^-19 Coulombs (the charge on one proton) and not 1.602 * 10^-10. I'm not sure about calling it "a charge of -1", but "a charge of e" (e is nature's unit of electric charge i.e. the charge on a proton) might also be confusing.

If the mass of a proton is 1000 MeV/c^2, and the mass of an axion is 10^-5 MeV/c^2, then the mass of an axion is not "less than a trillionth the mass of a proton", but my limited knowledge of particle physics is not sufficient to tell me where the mistake is.

Under "The Nature of Xi Particles", you use the term "hyperon". Please either define it or link to your article on hyperons.
Ekaterin.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 6

Baryonic Being - save GuideML out of a word-processor: A7720562

Thanks Ekaterin. Nitpicking can be considered a good thing! I have altered things here and there now, and if you were wondering, the only reason that I put strange in quotes was because 'strange' is a strange name for a quark.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 7

Ekaterin

Thanks for the updates, but what you say about the mass of an axion is still not consistent.

electron mass = 0.510998903 MeV
proton mass = 938.271996 MeV

A billionth the mass of an electron would be 5*10^-10 MeV. A trillionth the mass of a proton would be 9*10^-10 MeV. 10^-5 MeV is much more than either of these - did you perhaps mean 10^-5 eV or 10^-11 MeV?

Googling for "axion particle" seems to confirm the "trillionth of the mass of a proton, billionth of the mass of an electron" thing. Unfortunately Google doesn't seem to know the mass of an axion the way it knows the mass of a proton and an electron.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 8

Baryonic Being - save GuideML out of a word-processor: A7720562

I'm not sure. I can't remember where I found that information out. Perhaps it will be best if I just take that comparison out completely.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 9

Apollyon - Grammar Fascist

"In the last sentence under "The Nature of Particles", "Coulomb" should have a capital C because the unit is named after a person."

OK, this is >seriously< nitpicking, but what are you going to do, eh?
'Coulomb' would only have a capital C if it's referring to Coulomb himself. However, since the unit is not a person, it has a small c, though a capital C is used when denoting it in abbreviation, ie:
X coulombs would be written as X C. The same thing goes for quantities such as newtons and webers, but I doubt this really makes any difference.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 10

FordsTowel

Hi BB,

If you are still concerned about the title's length, perhaps you could best shorten it (without losing the meat) by simply dropping 'The Depths of' and naming it 'The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles'.

Just a minor thought on an excellent piece.

smiley - towel


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 11

Baryonic Being - save GuideML out of a word-processor: A7720562

Thanks for the suggestion. I'll wait until there's more feedback yet.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 12

Baryonic Being - save GuideML out of a word-processor: A7720562

If there's going to be any.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 13

Apollyon - Grammar Fascist

Doesn't look like it.


A2271205 - The Depths of the Sub-Atomic World: Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 14

Baryonic Being - save GuideML out of a word-processor: A7720562

That's a shame.


A2271205 - The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 15

Baryonic Being - save GuideML out of a word-processor: A7720562

I've thought about it and changed the name of the entry as per the suggestion anyway.

The entry has now been dormant yet totally finished for nearly 18 weeks. smiley - winkeye


A2271205 - The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 16

HonestIago

Just read over it and it looks superb, I wish it had been around when I was revising for my A Levels last year. Can't see why a Scout hasn't been along yet


A2271205 - The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 17

Baryonic Being - save GuideML out of a word-processor: A7720562

A-Level Physics? I would have thought that kaons, axions et al would be rather obscure for most A-Level courses, but thanks for the compliment. smiley - smiley


A2271205 - The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 18

HonestIago

We touched upon kaons and xi particles - our Physics teacher was notorious for giving us work harder than it needed to be. I'd never come across axions before, very interesting


A2271205 - The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 19

Baryonic Being - save GuideML out of a word-processor: A7720562

Yes. Axions are, after all, hypothetical at the moment.


A2271205 - The Sub-Atomic World of Kaons, Axions, J/Psi, Sigma and Xi Particles.

Post 20

Z

This is looking good smiley - biggrin


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