Re: Why matter, anti-matter imbalance?

[Lawrence Crowell]

On Sunday, April 1, 2018 at 2:09:29 PM UTC-5, agrays...@gmail.com wrote:
>
>
>
> On Sunday, April 1, 2018 at 11:23:27 AM UTC, Lawrence Crowell wrote:
>>
>> A standard neutrino has isospin charge for SU(2) so the neutrino and 
>> anti-neutrino have opposite weak interaction isospin charge. This is 
>> transformed by the C operator in the CP discrete symmetry. We might then 
>> expect if Majorana neutrinos exist that ν and ν-bar (neutrino and 
>> antineutrino with isospin charge) can interact with ν + ν-bar → Z  → 2ν_m, 
>> so the intermediary particle Z = W^0 has charge Q = T_3 + 1/2Y by the Gell 
>> Mann-Nishijima formula with Q = 0 and vanishing hypercharge Y = 0 so T^3 = 
>> 0. This isospin charges of the neutrino and antineutrino cancel to generate 
>> a Z which might if the quantum channel is available decay into two Majorana 
>> neutrinos.
>>
>> In a standard weak nuclear decay if Majorana neutrinos are produced there 
>> is no net generation of weak isospin charge. The electron and positron have 
>> opposite isospin charges and so a weak interaction decay that would produce 
>> Majorana neutrinos are then expected to be beta-less decay processes. This 
>> experiment has found none and put a bound on this process as 1:10^{24}, 
>> which is pretty small. 
>>
>> LC
>>
>
> *Can you explain in relatively simple terms why finding the sought-after 
> signature would explain the asymmetry in matter/anti-matter? TIA, AG*
>

It is that the Majorana neutrino being its own anti-particle is then as a 
particle giving preference to the particle states instead of the 
anti-particle states. This would be particularly if we consider the C as a 
symmetry on electric charge, but not isospin. Weak interactions break CP 
symmetry and as a result this means Majorana neutrinos will by this CP 
violation prefer particles over anti-particles.

LC
 

>
>
> On Saturday, March 31, 2018 at 6:39:19 PM UTC-6, agrays...@gmail.com 
> wrote:
>>
>> https://newatlas.com/are-neutrinos-majorana-fermions/54036/
>>
>

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Re: Why matter, anti-matter imbalance?

[John Clark]

​
On Sun, Apr 1, 2018 at 3:09 PM,  wrote:


*​> ​Can you explain in relatively simple terms why finding the
> sought-after signature would explain the asymmetry in matter/anti-matter?
> TIA, AG*


There is a theory that neutrinos are Majorana particles, if so they are
their own anti particle and the conservation of lepton number law is
untrue, and that could explain why there is more matter than anti matter in
the universe. In beta decay a neutron turns into a proton and emits a
electron and a anti-neutrino, a electron has a lepton number of +1 and for
a anti-neutrino  its -1 so equal numbers of matter and anti-matter
particles are created. Sometimes elements undergo double beta decay in
which 2 neutrons emit 2 electrons and 2 anti-neutrinos, its very rare but
it has been observed. What people are looking for is something called
Neutrinoless Double Beta Decay, if it exists one neutron would annihilate
the other producing pure energy, so 2 neutrons would decay into 2 protons
and 2 electrons (moving with a bit more energy than normal) and no
anti-neutrinos, so the number of matter particles would increase but the
number of anti-matter particles would not. Nobody has seen Neutrinoless
Double Beta Decay yet but they're still looking, we do know that if it
exists the half life of an atom undergoing Neutrinoless Double Beta Decay
is greater than 1.9*10^25 years. If somebody does find it somebody is going
to get a Nobel Prize for explaining the asymmetry between matter and
anti-matter.

John K Clark

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Re: Why matter, anti-matter imbalance?

[agrayson2000]

On Sunday, April 1, 2018 at 11:23:27 AM UTC, Lawrence Crowell wrote:
>
> A standard neutrino has isospin charge for SU(2) so the neutrino and 
> anti-neutrino have opposite weak interaction isospin charge. This is 
> transformed by the C operator in the CP discrete symmetry. We might then 
> expect if Majorana neutrinos exist that ν and ν-bar (neutrino and 
> antineutrino with isospin charge) can interact with ν + ν-bar → Z  → 2ν_m, 
> so the intermediary particle Z = W^0 has charge Q = T_3 + 1/2Y by the Gell 
> Mann-Nishijima formula with Q = 0 and vanishing hypercharge Y = 0 so T^3 = 
> 0. This isospin charges of the neutrino and antineutrino cancel to generate 
> a Z which might if the quantum channel is available decay into two Majorana 
> neutrinos.
>
> In a standard weak nuclear decay if Majorana neutrinos are produced there 
> is no net generation of weak isospin charge. The electron and positron have 
> opposite isospin charges and so a weak interaction decay that would produce 
> Majorana neutrinos are then expected to be beta-less decay processes. This 
> experiment has found none and put a bound on this process as 1:10^{24}, 
> which is pretty small. 
>
> LC
>

*Can you explain in relatively simple terms why finding the sought-after 
signature would explain the asymmetry in matter/anti-matter? TIA, AG*

On Saturday, March 31, 2018 at 6:39:19 PM UTC-6, agrays...@gmail.com wrote:
>
> https://newatlas.com/are-neutrinos-majorana-fermions/54036/
>

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Re: Why matter, anti-matter imbalance?

[Lawrence Crowell]

A standard neutrino has isospin charge for SU(2) so the neutrino and 
anti-neutrino have opposite weak interaction isospin charge. This is 
transformed by the C operator in the CP discrete symmetry. We might then 
expect if Majorana neutrinos exist that ν and ν-bar (neutrino and 
antineutrino with isospin charge) can interact with ν + ν-bar → Z  → 2ν_m, 
so the intermediary particle Z = W^0 has charge Q = T_3 + 1/2Y by the Gell 
Mann-Nishijima formula with Q = 0 and vanishing hypercharge Y = 0 so T^3 = 
0. This isospin charges of the neutrino and antineutrino cancel to generate 
a Z which might if the quantum channel is available decay into two Majorana 
neutrinos.

In a standard weak nuclear decay if Majorana neutrinos are produced there 
is no net generation of weak isospin charge. The electron and positron have 
opposite isospin charges and so a weak interaction decay that would produce 
Majorana neutrinos are then expected to be beta-less decay processes. This 
experiment has found none and put a bound on this process as 1:10^{24}, 
which is pretty small. 

LC

On Saturday, March 31, 2018 at 6:39:19 PM UTC-6, agrays...@gmail.com wrote:
>
> https://newatlas.com/are-neutrinos-majorana-fermions/54036/
>

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Why matter, anti-matter imbalance?

[agrayson2000]

https://newatlas.com/are-neutrinos-majorana-fermions/54036/

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