Thread Closed

quarks make the neutrons and protons

 
Share Thread Thread Tools
Jun18-03, 05:42 AM   #1
 
Question

quarks make the neutrons and protons

dear reader,
Does any one know about Quark. i know that quarks make the nutrons and protons. But i still dont understand it clearly.

Benzun
PhysOrg.com
PhysOrg		 physics news on PhysOrg.com

>> The better to see you with: Scientists build record-setting metamaterial flat lens
>> New analysis yields improvements in a classic 3D imaging technique
>> Research effort deep underground could sort out cosmic-scale mysteries
Jun18-03, 06:25 AM   #2
 
Introduction to particle physics
Here I quote a paragraph from the above website. This website is quite interesting and easy to read.

To start with, there are six types of quarks (plus their six antiquarks), which are coupled into three pairs. They are the up-down, the charm-strange, and the top-bottom (sometimes known as truth-beauty). Another interesting fact about quarks is that you can never find one by itself, as they are always with other quarks arranged to form a composite particle. The name for these composite particles is "hadrons". Quarks, like protons and electrons, have electric charge. However, their electric charges are fractional charges, either 2/3 or -1/3 (-2/3 and 1/3 for antiquarks), and they always arrange to form particles with an integer charge (ie. -1, 0, 1, 2...).
After reading this website, I'm sure you can get lots of information about elementary particles besides quarks.
Jun18-03, 01:28 PM   #3
 
All matter is composed of quarks and/or leptons. These are the fundamental particles of matter. For example, look at a simple hydrogen atom. It has a single proton and a single electron. The proton is composed of three quarks (two ups and one down); the electron is a specific type of lepton. A deuterium isotope is a hydrogen atom with a neutron in the nucleus. Like the proton, the neutron is also composed of three quarks (one up and two downs).

String theorists tell us that quarks and leptons are fundamentally composed an identical entity, the string. The characteristic that gives rise to the difference between these two species is the mode of vibration of the said string.

eNtRopY
Jun18-03, 01:53 PM   #4
 
Recognitions:
Gold Membership Gold Member
Science Advisor Science Advisor
Retired Staff Staff Emeritus

quarks make the neutrons and protons

Check out one of my favorite sites, http://www.particleadventure.org/

- Warren
Jun18-03, 02:26 PM   #5
FZ+
 
entropy: Haven't you forgotten gluons there?
Jun18-03, 02:54 PM   #6
 
Originally posted by FZ+
entropy: Haven't you forgotten gluons there?
Well, I don't think there is any type of matter that is composed of gluons... so no, I didn't forget gluons.

But what do I know? I am but a mere quantum engineer. The information I have provided is what I remember from sophomore-level modern physics. Typically, I only deal with the theory of quantum mechanics... I don't get into the standard model... and I don't really don't worry about the structure of matter that often.

eNtRopY
Jun18-03, 03:00 PM   #7
 
Originally posted by eNtRopY
Well, I don't think there is any type of matter that is composed of gluons... so no, I didn't forget gluons.

But what do I know?
I guess I'm wrong, I have just learned that in theory there exists a particle composed of gluons called a glueball. Suffice it to say, you won't find any ordinary matter composed of gluons.

eNtRopY
Jun18-03, 03:00 PM   #8
 
Recognitions:
Science Advisor Science Advisor
Originally posted by eNtRopY String theorists tell us that quarks and leptons are fundamentally composed an identical entity, the string. The characteristic that gives rise to the difference between these two species is the mode of vibration of the said string.
Yang-mills gauge charges sit at the ends of open strings and are not determined by vibrational degrees of freedom.
Jun18-03, 03:06 PM   #9
 
Originally posted by jeff
Yang-mills gauge charges sit at the ends of open strings and are not determined by vibrational degrees of freedom.
And I'm sure that means so much to the beginner inquiring about what quarks are... jeff.

eNtRopY
Thread Closed
Thread Tools


Similar Threads for: quarks make the neutrons and protons
Thread Forum Replies
Quark(s) High Energy, Nuclear, Particle Physics 13
Quark High Energy, Nuclear, Particle Physics 22
How big is a quark? High Energy, Nuclear, Particle Physics 5
Top Quark to Top Quark collisions High Energy, Nuclear, Particle Physics 0
[SOLVED] strange quark and charm quark General Physics 0