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Atmospheric Neutrino Constraints on Lorentz Violation

 
This forum is locked: you cannot post, reply to, or edit topics.   This topic is locked: you cannot edit posts or make replies.    jcYoon's Physics Forum Index -> Professor Sheldon Lee Glashow
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jcyoon



Joined: 08 Aug 2006
Posts: 213

PostPosted: Sat Oct 21, 2006 1:01 pm    Post subject: Atmospheric Neutrino Constraints on Lorentz Violation Reply with quote

slg@bu.edu
Sat 2004-10-30 2:11 AM

Dear Professor Sheldon Lee Glashow,

Recently, I have read your paper on "Atmospheric Neutrino Constraints on Lorentz Violation".

I am not sure how Lorentz violation can be postulated with CPT conservation, since, as long as I know, CPT theorem is proved based on Lorentz invariance.

I would like to appreciate if you could help me understand this issue.

Thanks,
J.C. Yoon
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Sheldon Lee Glashow



Joined: 21 Oct 2006
Posts: 1

PostPosted: Sat Oct 21, 2006 1:04 pm    Post subject: Re: Atmospheric Neutrino Constraints on Lorentz Violation Reply with quote

Sat 2004-10-30 5:18 AM


J.C. Yoon wrote:

>Dear Professor Sheldon Lee Glashow,
>
>Recently, I have read your paper on "Atmospheric Neutrino Constraints
>on Lorentz Violation".
>
>I am not sure how Lorentz violation can be postulated with CPT
>conservation, since, as long as I know, CPT theorem is proved based on Lorentz invariance.
>
>I would like to appreciate if you could help me understand this issue.
>
>Thanks,
>J.C. Yoon
>
>

The cpt theorem states that every lorentz-invariant local quantum field theory admits a cpt symmetry.

A theory that is NOT lorentz invariant may (or may not) admit a cpt symmetry.
That is: one may introduce tiny terms into the lagrangian that are not lorentz invariant but are (or are not) cpt invariant. See, for example, my papers with Coleman.
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jcyoon



Joined: 08 Aug 2006
Posts: 213

PostPosted: Sat Oct 21, 2006 1:06 pm    Post subject: RE: Atmospheric Neutrino Constraints on Lorentz Violation Reply with quote

Sat 2004-10-30 5:46 AM

Dear Professor Sheldon Lee Glashow,
I agree with your point and I sincerely apologize for my shortsighted understanding.

But, is this the reason that the massless limit of massive fermion in Standard Model that implies Lorentz violation is allowed?

I would like to appreciate you help in advance.

Thanks,
J.C. Yoon



-----Original Message-----
From: Shelly Glashow [mailto:slg@bu.edu]
Sent: Friday, October 29, 2004 1:18 PM
To: J.C. Yoon
Subject: Re: Atmospheric Neutrino Constraints on Lorentz Violation


J.C. Yoon wrote:

>Dear Professor Sheldon Lee Glashow,
>
>Recently, I have read your paper on "Atmospheric Neutrino Constraints
>on Lorentz Violation".
>
>I am not sure how Lorentz violation can be postulated with CPT
>conservation, since, as long as I know, CPT theorem is proved based on Lorentz invariance.
>
>I would like to appreciate if you could help me understand this issue.
>
>Thanks,
>J.C. Yoon
>
>

The cpt theorem states that every lorentz-invariant local quantum field theory admits a cpt symmetry.

A theory that is NOT lorentz invariant may (or may not) admit a cpt symmetry.
That is: one may introduce tiny terms into the lagrangian that are not lorentz invariant but are (or are not) cpt invariant. See, for example, my papers with Coleman.
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jcyoon



Joined: 08 Aug 2006
Posts: 213

PostPosted: Sat Oct 21, 2006 1:07 pm    Post subject: RE: Atmospheric Neutrino Constraints on Lorentz Violation Reply with quote

Sat 2004-11-13 8:47 AM


Dear Professor Sheldon Lee Glashow,
I am afraid if you find this email annoying and sincerely apologize for bothering you, but I would like to let you know I am still waiting for you response.

Let me rephrase my statement.
In my opinion, the massless limit of massive fermion in Standard Model implies Lorentz violation and we can prove it and this is a critical issue for the success of Standard Model.

I would be grateful if you can share your opinion with me.

Thanks,
J.C. Yoon

-----Original Message-----
From: J.C. Yoon [mailto:jcyoon@u.washington.edu]
Sent: Friday, October 29, 2004 1:46 PM
To: Shelly Glashow
Subject: RE: Atmospheric Neutrino Constraints on Lorentz Violation


Dear Professor Sheldon Lee Glashow,
I agree with your point and I sincerely apologize for my shortsighted understanding.

But, is this the reason that the massless limit of massive fermion in Standard Model that implies Lorentz violation is allowed?

I would like to appreciate you help in advance.

Thanks,
J.C. Yoon



-----Original Message-----
From: Shelly Glashow [mailto:slg@bu.edu]
Sent: Friday, October 29, 2004 1:18 PM
To: J.C. Yoon
Subject: Re: Atmospheric Neutrino Constraints on Lorentz Violation


J.C. Yoon wrote:

>Dear Professor Sheldon Lee Glashow,
>
>Recently, I have read your paper on "Atmospheric Neutrino Constraints
>on Lorentz Violation".
>
>I am not sure how Lorentz violation can be postulated with CPT
>conservation, since, as long as I know, CPT theorem is proved based on Lorentz invariance.
>
>I would like to appreciate if you could help me understand this issue.
>
>Thanks,
>J.C. Yoon
>
>

The cpt theorem states that every lorentz-invariant local quantum field theory admits a cpt symmetry.

A theory that is NOT lorentz invariant may (or may not) admit a cpt symmetry.
That is: one may introduce tiny terms into the lagrangian that are not lorentz invariant but are (or are not) cpt invariant. See, for example, my papers with Coleman.
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