38 Facts About Baryons and Mesons as Hadrons

 

Facts about hadrons

1.     Hadrons are class of sub-atomic particles.

2.     Hadrons are also called nuclear particles.

3.     They are grouped into baryons and mesons

4.     Baryons have three quarks.

5.     The nuclear time is given as 10^-23 seconds.

6.     Example of baryons are protons, neutrons , hyperons etc.

7.     Example of mesons are pions, kaons etc.

8.     Particle undergoing both weak and electromagnetic decay are called semi-stable.

9.     Meson have one quark and an antiquark

10.                  Quarks in hadrons are held by strong nuclear force mediated by gluons.

11.                  Protons and neutron are hadrons.

12.                  Proton is a stable proton while neutron decays when outside a nucleus.

13.                  Pion is an example of mesons.

14.                  Leptons combine with hadrons to form atoms, for example electrons and protons combin to form hydrogen.

15.                  Hadrons are massive than leptons .

16.                  Quarks have colour but hadrons are either white or no colour.

17.                  Properties of hardons are determined by their valence quarks.

18.                  All three quarks in protons and neutron contribute only 1% of their total mass.

19.                  At high temperature the strong nuclear force may be overcomed and the hadron will collapse.

20.                  Proton is a positive hadron

21.                  Neutron is a neutral hadron

22.                  Third generation lepton, tau is massive than proton or neutrons.

23.                  Proton is the only stable free hadron.

24.                  Hadron is a fermionic.

25.                  Fermions are  all particle that are subjected to pauli exclusion principle.

26.                  All baryons posses baryon number.

27.                  Baryons have baryon number B=1

28.                  Meson have baryon number ,B=0

29.                  All baryons have their corresponding antibaryons.

30.                  Quarks made up baryons while antibaryons are made up of antiquarks.

31.                  When baryons and antibaryons meet they annihilate.

32.                  The word hadrons was coined by sir lev B. Okun in 1962.

33.                  Quarks in hadrons cannot be isolated individually because of phenomena called colour confinement.

34.                  Hadrons are colourless or white due to colour confinement.

35.                  More than 200 nuclear particles are discovered but only few are stable.

36.                  Pions can be produced in the laboratory by use of beam of 380Mev proton beam obtained from syncho-cyclotron.

37.                  Muon and pions are short-lived particle found in cosmic rays.

38.                  hadrons are composite particle made up of quarks and  held by strong nuclear force mediated by gluons.

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