I know that sub-atomic particles like protons and electrons are made
up of three quarks each, as is a neutron. I no longer have my old
college physics book, so I cannot look it up myself, and I have so far
been unable to find a web reference to answer my question.

That question is, when the three quarks of the electron and the three
quarks of the proton combine, creating a neutron... What sub-atomic
particle do the three "left over" quarks create? Is it a neutrino?

Have they actually been discovered? Last time I knew, they were
theorized, but never actually "seen".

The Master <tar...@nospam.sdf.lonestar.org.nospam> writes:
I know that sub-atomic particles like protons and electrons are made
up of three quarks each, as is a neutron.  I no longer have my old
college physics book, so I cannot look it up myself, and I have so far
been unable to find a web reference to answer my question.

Protons and neutrons are composed of quarks, but not electrons;
electrons don't have any internal structure that we've observed.
So there's only three quarks in the initial and final states.

That question is, when the three quarks of the electron and the three
quarks of the proton combine, creating a neutron...  What sub-atomic
particle do the three "left over" quarks create?  Is it a neutrino?

http://en.wikipedia.org/wiki/W_and_Z_bosons

has a neutron decay diagram; electron capture by a proton is the same
process turned sideways.  The proton and electron exchange a W boson,
turning the electron into a neutrino and one of the u quarks in the
proton into a d quark, which changes the proton into a neutron.

Have they actually been discovered?  Last time I knew, they were
theorized, but never actually "seen".

Neutrinos have been "seen".  Since neutrinos interact very weakly
with normal matter, it takes a lot of mass to observe neutrino
interactions.  One of my favorite neutrino observatories used
photomultiplier tubes embedded in the Antarctic ice cap:

http://www.amanda.uci.edu/public_info.html

Also see the follow-on experiment,

http://www.icecube.wisc.edu/info/

And for a list of recent neutrino detectors:

http://en.wikipedia.org/wiki/Neutrino_detector

-dan

"GatherNoMoss" <saints2...@yahoo.com> wrote in message

news:4f5186ee-8099-4d17-92f5-6c72ae59035b@n58g2000hsf.googlegroups.com...
: Speaking of neutrinos.....
:
: I know they interact weakly with ordinary matter....
:
: But every once in a while one does interact.
:
: A couple months ago one "interacted" with one of my nuts.....oh dang
: that hurt !
:
: I yelled out "Neutrino sum bitch !" and shook my fist toward the Sun
:
: Oh sure they have almost no mass......but traveling at almost light
: speed....yeah, it'll get your attention.
:
: I now wrap my bag with aluminum foil because I'm pretty sure it'll
: block neutrinos
: and other signals.

You'll need a lump of lead two light-years thick to block a neutrino.

Maybe your balls are special.

wrong!

protons and Neutrons are not compsed only of '3 quarks"

th emass of 3 quarks is less than 10 percent of the P N
mass
the rest 90 percent of missing mass
is the 90 percent  sameless ignorance of existing scince
people have to impertinace to say that the rest 90 percent missing
is ...
'glueons'
that no one really knowes to fill that abstart say
by any substancial reality or verification
just  shamelsss  mumble jumble

now listen carefully what old Catto tells you

the missing 90 percent  ---is massive subparticles
(there is just one kind of mass !!
no relativistic and no schmelativistic!) --