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InertialObservr's profile
〈 Berger | Dillon 〉
〈 Berger | Dillon 〉
〈 Berger | Dillon 〉
@InertialObservr

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〈 Berger | Dillon 〉

@InertialObservr

PhD student of Theoretical Particle Physics @UCIrvine l @NSF Fellow l Physics & Math Animations l Patreon: https://www.patreon.com/inertialobserver …

DC → CA
youtube.com/c/InertialObse…
Joined August 2015

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    1. Anomaly Canceller‏ @litgenstein Feb 21
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      Interesting Q someone asked: quantum electrodynamics has an obvious classical theory it corresponds to, but quantum chromodynamics and electroweak theory don’t—why’s that? Possible answer: there’s electromagnetism in daily life, but no strong or electroweak force

      12 replies 9 retweets 130 likes
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    2. Sean Carroll‏Verified account @seanmcarroll Feb 21
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      Replying to @litgenstein

      There definitely is a classical Lagrangian for those theories. It’s just that quantum effects are very important in the presence of confinement and SSB, not so much when everything’s perturbative.

      2 replies 2 retweets 47 likes
    3. Anomaly Canceller‏ @litgenstein Feb 21
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      Replying to @seanmcarroll

      Good stuff! Do you think the classical lagrangian is unique? Or that it depends on how you take the classical limit?

      3 replies 0 retweets 16 likes
    4. 〈 Berger | Dillon 〉‏ @InertialObservr Feb 21
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      Replying to @litgenstein @seanmcarroll

      I think what Sean is saying is that the Classical theory *is* the QCD lagrangian at tree level

      2 replies 0 retweets 10 likes
      〈 Berger | Dillon 〉‏ @InertialObservr Feb 21
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      Replying to @InertialObservr @litgenstein @seanmcarroll

      so when everything is weakly coupled (as he said), everything is well defined and we can calculate the observables using tree level interactions of Yang Mills, just as we can with QED at tree level as well.. it's just that the theory breaks down at ~.1GeV

      3:33 PM - 21 Feb 2020
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      • Ethan.B Fork From Home Leo C. Stein 🦁 Gary Rev Prez Anomaly Canceller
      0 replies 1 retweet 6 likes

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