Total number of hadrons

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Kuba Glad - 23 Sep 2007 15:33 GMT

Hi all,

I try to find total number of discovered hadrons (including resonances)
but after 3 hours of googling I surrender. Particle Data Group

http://pdg.lbl.gov/

seems to have most comprehensive database, but they don't provide info
on this level of simplicity. When I started to count mesons I've got two
different sums, depending on the document I used to count (164 and 226).

As I'm not a physicist it's hard for me to find suitable document, where
I could do counting. Could someone help me with this task ? I need this
number for science-popularization article. Also distinction between
particles and antiparticles would be helpful.

Sunny regs
Kuba

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Autymn D. C. - 03 Oct 2007 04:27 GMT

> I try to find total number of discovered hadrons (including resonances)
> but after 3 hours of googling I surrender. Particle Data Group
[quoted text clipped - 9 lines]
> number for science-popularization article. Also distinction between
> particles and antiparticles would be helpful.

When do you need this done?

I'v the /Review of Particle Physics/ (2006, 1232 pages!) with me. In
the summary tabula there are 157 mes?ns, 103 confirmed, 96 further
states; 127 baru?ns, 75 confirmed, 12 further states--antis count as
the same. Nearly all of these are greater-mass/momentum excitations
of the same quark compounds. (Would you count the nearly-infinite
energy levels of hydrogen as separate atoms?) A handful are
composite: glueballs, dimes?ns, dibaru?ns, maybe three pentaquarks.

-Aut

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Al.Rivero@gmail.com - 06 Oct 2007 16:31 GMT

If you are going to use the pdg data in a divulgation article, it
could be a good idea to sepak of the first and second espectroscopy,
in order for people to understand the excited states.

> > I try to find total number of discovered hadrons (including resonances)
> > but after 3 hours of googling I surrender. Particle Data Group
[quoted text clipped - 21 lines]
>
> -Aut

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Natural Science Forum / Physics / Particle Physics / October 2007

Total number of hadrons