Posts Tagged 'particle astrophysics'

The cosmos laughs at our puny particle colliders

Tycho's supernova remnant puts our particle accelerators to shame. Bonus: two people I know helped create this X-ray image! [Credit: NASA/CXC/Rutgers/J.Warren & J.Hughes et al.]

Tycho’s supernova remnant puts our particle accelerators to shame. Bonus: two people I know helped create this X-ray image! [Credit: NASA/CXC/Rutgers/J.Warren & J.Hughes et al.]

A while back, a few other science writers and I were chatting idly on Twitter about how common Higgs bosons might be in the cosmos. Not because they stick around very long — their lifetime is incredibly short — but because there are a lot of high-energy collisions near black holes, in supernova remnants, and the like. If you slam two protons (or even other particles like electrons and positrons) together at sufficiently high speeds, Higgs bosons are some of the possible products.

I filed the conversation away in my memory, and then finally got a chance to write about it for (drumroll, please) NOVA’s blog! Suffice to say this was a fun article to write: I started it without knowing a lot about the topic, and ended feeling like I had learned something. Hopefully it’s as interesting to read as it was to write.

While astronomical sources may be good accelerators, that doesn’t mean the cosmos is full of good colliders. Our Earth-bound experiments are designed to focus beams of protons or other particles into tight “bunches” (that’s the technical term!), then send those bunches slamming into each other from opposite directions. That sort of thing is rare in space: A cloud of gas left after a supernova may be full of fast-moving protons, but direct collisions are not very common.

However, Earth itself is part of the Universe’s collider, the accidental “target” for beams of cosmic rays from deep space. [Read more…]


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