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W- boson and beta decay (old title: Nuclear physics)

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  1. Aug 21, 2014 #1

    smk

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    How W- boson decay into electron and anti neutrino?
     
  2. jcsd
  3. Aug 21, 2014 #2

    ChrisVer

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    Gold Member

    Well it depends on what you find as a satisfying answer. I'd say that it decays into such, because "it can" . It's allowed to (due to the symmetries) interact/couple with those particles and so it does.

    + the ( W-> e nu ) is conserving all the quantities we think that are conserved.

    P.S. - the title of the thread is misleading, you should try to write a title that represents clearly your question.
     
  4. Aug 21, 2014 #3

    smk

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    Thank...basically I m confused in beta decay.in which proton is transformed in to neutron.as we know that proton is lighter then neutron.
     
  5. Aug 21, 2014 #4

    ChrisVer

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    And that actually means that a proton by itself cannot decay to a neutron (what I'm saying is that the proton decay is not an 1->3 particle decay).
    In fact it needs to be able to drain energy from the environment so that is to say the decay is actually of the form:
    [itex] p e^- \rightarrow n \nu [/itex]
    or having something else:
    [itex] X p \rightarrow X n e^+ \nu [/itex]
    So a 1+(1)->3+(1) which can energetically allow it.
     
  6. Aug 21, 2014 #5

    smk

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    Thanks
     
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