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Consequence of Making a Higgs particle

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  1. Sep 23, 2014 #1
    Now we are presumably creating (?) Higgs Bosons in the collider. But the universe is permeated already by the Higgs field and Higgs bosons. When the colliders make an "artificial" Higgs, what conservation laws (in addition to energy, momentum, charge, isospin, baryon number etc.)are obeyed? In other words, is there a disturbance in the existing Higgs field in that collider space? Are the particles in the collider affected by this disturbance.

    Above all, is this a wrong and improper question in some way. If yes, how?

    Thanks
     
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  3. Sep 23, 2014 #2

    Vanadium 50

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    Consequence of Making a Higgs particle: well, there was some champagne, some speeches, and eventually two theorists got the Nobel prize.

    It's not permeated by Higgs bosons.
     
  4. Sep 23, 2014 #3

    Simon Bridge

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    To be fair, "permeated" is probably not being used in a precise way.

    If I may have a go... the key questions seem to be:
    ... since a Higgs particle can be thought of as a disturbance, of a particular kind, in the Higg's field, then the whole point of the experiment is to disturb the pre-existing field inside the collider. Before the higgs was made the field had a particular topology and after the higgs was made it had another topology that includes the particular ripple corresponding to the higgs particle (as well as lots of other changes I'm guessing). I'm sure Vanadium will correct me ;)

    With the second question, I think you are asking if the created higgs then goes on to interact with any of the myriad other particles also present. Perhaps you are wondering if any of the other particles gained extra mass as a result? Is that about right?
     
  5. Sep 23, 2014 #4

    TumblingDice

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    A few comments from a naive member (me). I'm looking to more knowledgable members to correct any errors and fill in accurately.

    Actually, the universe is permeated by the Higgs field, but not Higgs bosons, due to their extremely short lifetime. They decay so rapidly, detecting the Higgs boson at the LHC is actually done by the confirmation/detection of particles the Higgs has already decayed into.

    It's not artificial - it's the real deal. The enourmous energy levels the LHC provides are required to create the particle. All conservation laws are obeyed as far as I'm aware.

    Here's where I was initially confused when I first became interested in the quest for the Higgs: I read the Higgs was all about giving other particles their mass (requiring a proportionate force to accelerate them, for example). BUT, as I searched to learn further, I found that it's more about the Higgs field than the boson. It's the Higgs field that is all around and associated with giving certain particles their mass.

    If I understand correctly, all fields are associated with corresponding particles. The particles are excitations of their field. (I think) For example, photons are the carriers of the EM (electromagnetic) field. Now then, the big deal about creating a Higgs boson was because it's the particle the Standard Model predicted to be associated with the Higgs field. Physicists had pretty good ideas of the attributes it would have and the high energy required to create one. Confirming the Higgs particle was a confirmation of the Higgs field.

    Hope what I've written is 'mostly' correct :rolleyes: and helps to fill in some of the picture.
     
  6. Sep 24, 2014 #5
    I apologize, I did mean Higgs Field but also a boson associated with it. Yes, I am wondering if the appearance of the Higgs boson changes the Higgs field locally and what is the consequence.
     
  7. Sep 24, 2014 #6
    I am still puzzled by this question. I admit that the Higgs decays, but only in a finite time such that, for example, energy has to be conserved. In the case of creating quarks etc., there are clear conservation laws. In the case of Higgs production there must be a consequence,a ripple and something else must happen. Higgs is unique in this regard, isnt it?
     
  8. Sep 24, 2014 #7

    ChrisVer

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    I have problem in understanding what you mean by consequence... Consequence means that something does A and as a result A will give B back...

    For the Higgs production you just need to give enough energy to the particles [which interact with Higgs] so that the Higgs will be created...after that Higgs is going to decay..
     
  9. Sep 24, 2014 #8
    Higgs particle production is not unique in this regard. Its creation is not terribly different from, say, a case where a photon is created by smashing electrically charged particles, or a W-boson is created by smashing weakly-interacting particles. In all three cases, you need to supply enough energy for that to be possible, and all other conservation laws also must be fulfilled. For example, angular momentum must be conserved, so creation of a photon or W changes spin of parent particles by 1 unit. Creation of W appropriately changes electrical charge of parent particles.

    Both W and H are unstable, so they would both decay (and decay process will obey conservation laws). Again, nothing terribly different about Higgs here.
     
  10. Sep 24, 2014 #9

    mfb

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    The appearance of the boson is the change of the field. It does not have any consequences - it decays extremely fast, and then it is gone.

    All conservation laws are satisfied everywhere - that's why we call them conservation laws.
     
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