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22 Apr 2008 22:06:48 IST

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what are mesons?what is their function in an atom?

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what are mesons?what is their function in an atom?

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ultimator

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Joined: 27 Mar 2008

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22 Apr 2008 22:09:09 IST

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In particle physics, a meson is a strongly interacting boson that is, a hadron with integral spin. In the Standard Model, mesons are composite (non-elementary) particles composed of an even number of quarks and antiquarks. All known mesons are believed to consist of a quark-antiquark pair the so-called valence quarks plus a "sea" of virtual quark-antiquark pairs and virtual gluons. Searches for exotic mesons that have different constituents are ongoing. The valence quarks may exist in a superposition of flavor states; for example, the neutral pion is neither an up-antiup pair nor a down-antidown pair, but an equal superposition of both. Pseudoscalar mesons (spin 0) have the lowest rest energy, where the quark and antiquark have opposite spin, and then the vector mesons (spin 1), where the quark and antiquark have parallel spin. Both come in higher-energy versions where the spin is augmented by orbital angular momentum. All mesons are unstable.

ramyani chakrabarty

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22 Apr 2008 22:20:21 IST

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Originally meson theory was given to explain how protons stay together in the nucleus despite mutual repulsion.

It was assumed that protons become neutron and vice - versa exchanging meson b/w them.

the exact value of its mass was predicted which was later discovered.

chemicaltester

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22 Apr 2008 22:56:56 IST

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Mesons are intermediate mass particles which are made up of a quark-antiquark pair
Mesons are bosons too
now u would say what are quark and anti quark
Quarks are the building blocks which build up matter, i.e., they are seen as the "elementary particles".there are six lavor of quarks
Quarks are observed to occur only in combinations of two quarks wjich is meson

if u still dont understood go to wikipedia
rate me if u understood or nudge me if u dont

Krishna Gopal Singh

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Joined: 29 Dec 2006

Posts: 5153

23 Apr 2008 00:37:35 IST

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Good answers from all of you. to explain it simply mesons are a type of particles find in the nucleus of atoms which give rise to nuclear forces and hence are responsible for stable nucleus

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