Comments on: A diagrammatic hint of masses from the Higgs http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/ Thoughts on work and life from particle physicists from around the world. Mon, 31 Aug 2015 15:23:00 +0000 hourly 1 http://wordpress.org/?v=4.2.4 By: Daniel http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-154901 Wed, 06 Nov 2013 01:45:07 +0000 http://blogs.uslhc.us/?p=7134#comment-154901 The motion of an electron looks like the motion of a photon in a light-clock.
If this kind of motion is the reason for mass perhaps it is also the reason for time dilation at all?

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By: Eli http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-140991 Tue, 06 Aug 2013 08:36:03 +0000 http://blogs.uslhc.us/?p=7134#comment-140991 Hi Flip! Thank you for your posts! I have a question:
you have been talking about the Higgs boson, and you gave the Feynman rules for it. But when you talk about particles acquiring masses, shouldn’t you refer to the Higgs FIELD instead? Can you clarify a little bit about this?

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By: phil valder http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-138696 Mon, 15 Jul 2013 15:20:09 +0000 http://blogs.uslhc.us/?p=7134#comment-138696 excellent

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By: Nitin Yadav http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-122350 Tue, 16 Apr 2013 19:30:42 +0000 http://blogs.uslhc.us/?p=7134#comment-122350 What are non perturbative objects?

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By: Flip Tanedo http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-79844 Tue, 24 Jul 2012 17:25:16 +0000 http://blogs.uslhc.us/?p=7134#comment-79844 Hi Paul, thanks for the kind words. I think the following post addresses your question: E=mc2. Thanks! -F

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By: Paul De Rienzo http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-79842 Tue, 24 Jul 2012 17:20:08 +0000 http://blogs.uslhc.us/?p=7134#comment-79842 As an engineer “growing up” in the second half of the 20th century,a great deal of which was devoted to designing and building nuclear power plants – from their inception, literally, I am spellbound by your current day descriptions and explanations of particle mass and energy. In fact, I just don’t get it — yet!

But tell me, if you will, how would you expect the Einstein of e=mc square,to react to your current day representations of mass-less particles?

Thank you!

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By: raghubar singh http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-63099 Sun, 08 Apr 2012 17:49:37 +0000 http://blogs.uslhc.us/?p=7134#comment-63099 what is relation between gravity and curvature of space ?

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By: Mike Delaney http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-40127 Mon, 12 Dec 2011 09:08:49 +0000 http://blogs.uslhc.us/?p=7134#comment-40127 Since I am on a roll, I thought i would say that the Big Bang occurred when a vortex of energy laden particles HIT a Super planet. Our existing planets are simply fragments of that Super planet and the stars are simply pieces that haven’t yet cooled.

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By: Mike Delaney http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-40118 Mon, 12 Dec 2011 08:39:53 +0000 http://blogs.uslhc.us/?p=7134#comment-40118 A real big Bang can only occur, in a vortex, when super speed particles come in contact with a solid mass.

What happens when we create a vortex of higher frequency particles (bluer parts of the electromagnetic spectrum?? I only know light but know it is only a small part of the spectrum). Seems like REAL energy is to be found there.

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By: Mike Delaney http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-40112 Mon, 12 Dec 2011 08:15:04 +0000 http://blogs.uslhc.us/?p=7134#comment-40112 I am a layman.
I am interested in vorticies. Is the reason the black hole is black, because we are exceeding the speed of light???

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By: Capnaux http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-25944 Sat, 22 Oct 2011 22:51:11 +0000 http://blogs.uslhc.us/?p=7134#comment-25944 Good Q! Because it’s not reacting to “mass” per se; it’s that space-time itself is curved (or warped) so severely around a black hole that even something going the speed of light can’t “outrun” the curve and escape.

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By: Flip Tanedo http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-6836 Mon, 06 Jun 2011 23:21:44 +0000 http://blogs.uslhc.us/?p=7134#comment-6836 Hi Martin! My apologies for the long delay before getting to your question, I was away traveling. I don’t think it’s accurate to associate the Higgs interaction with friction or that one should think of a Higgs rest frame. For the latter point, perhaps a decent analogy would be the cosmological constant—there’s no “cosmological constant” rest frame. (Just don’t try to take this analogy much further, the point is just that there’s a background Higgs value which is—I believe—Lorentz invariant.)

The usual Higgs boson—the particle that we’d like to produce at the LHC—interacts via a Yukawa interaction, which is effectively the same way that physicists in the 50s modeled the interactions between baryons and mesons. The subtle things are the interactions which induce a particle mass. These are interactions with the Higgs vacuum expectation value (see my recent post) which do not transfer any momentum. It’s kind of a weird idea. In fact, usually when grad students first learn this there’s a bit of sleight of hand so that they don’t usually think about mass in this way.

I hope that helps—apologies if my answer is a bit vague.
-F

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By: Martin Pavlicek http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-6036 Sat, 21 May 2011 21:58:03 +0000 http://blogs.uslhc.us/?p=7134#comment-6036 Maybe I don’t understand the explanation deep enough, but for me there is one more big elephant in the room. If Higgs is interacting with some particles, it is then actually representaing a friction. Thus particles should slow down and finally stop (with respect to some weird Higgs reference frame). But the Higgs interaction should happen only when I’m trying to accelerate particles. Because only during acceleration I feel the resistance of mass. Higgs must somehow identify if a particle is accelerated or not and then start doing its job. How does this happen?

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By: Flip Tanedo http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-5799 Tue, 17 May 2011 19:30:05 +0000 http://blogs.uslhc.us/?p=7134#comment-5799 Great question, David! The Higgs does not directly interact with photons, however, it does interact with quarks and [charged] leptons, which in turn interact with photons. A good exercise is to draw this diagram. (Hint: it’s the same diagram for Higgs to gluon coupling.) As to why the Higgs can ‘indirectly’ couple to photons and not give them mass, the reason is a bit subtle. Unfortunately I’m not sure if I can explain it at the appropriate level for the blog—which means (as Feynman once said) that perhaps I don’t understand it deeply enough. The semi-technical explanation is that the particular kind of interaction between the Higgs and two photons (also two gluons) is not the sort that gives the mass term. In fancy words it couples through a quantum anomaly (triangle diagram). I’ll try to think further if I can give a better explanation. Thanks for the great question.

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By: David http://www.quantumdiaries.org/2011/05/05/a-diagrammatic-hint-of-masses-from-the-higgs/#comment-5798 Tue, 17 May 2011 19:06:56 +0000 http://blogs.uslhc.us/?p=7134#comment-5798 If the Higgs doesn’t interact with photons, then why is the H -> two photons decay channel one of the ones that is talked about as a search target at the LHC? Is that because it is a 3-pt instead of 2-pt interaction, so there is no mass term, and this is the next lowest diagram?

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