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photons pair produce leptons; gluons -> quarks ? Rate Topic: -----

#1 23 January 2012 - 09:16 AM Widdekind 


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If the gluon is a "Strong photon"; and if photons can pair produce leptons, e.g. \gamma \rightarrow \bar{e}e; then is gluon "fission" into quarks, the Strong interaction equivalent, of pair production ? (Note, I understand, that single photon "fission" can only occur, in the intense EM fields, near large nuclei -- but gluons "live" in such intense environments, so, naively, I'm "comparing apples w/ apples".)

Also, if you can have \bar{e}e \rightarrow \gamma \gamma, i.e. "complete matter/antimatter annihilation"; then can you have \bar{e}e \rightarrow \bar{\nu}\nu, i.e. "incomplete" annihilation (e.g. via double W-boson exchange) ??
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#2 23 January 2012 - 10:28 AM timo 


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View PostWiddekind, on 23 January 2012 - 09:16 AM, said:

If you can have \bar{e}e \rightarrow \gamma \gamma[...], can you have \bar{e}e \rightarrow \bar{\nu}\nu, i.e. [] annihilation (e.g. via double W-boson exchange) ??
You have this process at first order tree level with an intermediate Z boson in the s-channel or via an intermediate W in the t-channel (which is the analogue of e+ e- -> photons). Not sure what "double W-boson exchange" is, but of course you can construct higher-order Feynman diagrams, too.
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