- #1
maverick280857
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Hi,
Halzen and Martin, on page 18 of their book, describe the resolution of hadron structure using virtual photons obtained by annihilating e+ and e- beams.
In Figure 1.11(b), isn't the positron arrow shown wrongly? It seems to be moving forward in time. (Or maybe I'm just being picky here?)
They go on to say,
What does "produced at rest" mean?
Thanks in advance!
Halzen and Martin, on page 18 of their book, describe the resolution of hadron structure using virtual photons obtained by annihilating e+ and e- beams.
In Figure 1.11(b), isn't the positron arrow shown wrongly? It seems to be moving forward in time. (Or maybe I'm just being picky here?)
They go on to say,
Colliding very high-energy electron and positron beams also provides us with an extremely "clean" technique to probe quarks (see Fig. 1.11b). The photon, produced at rest by e+ and e- beams colliding head on, can decay into a qqbar pair as shown in the pictuire.
What does "produced at rest" mean?
Thanks in advance!