Recent content by btphysics

Sorry for only answer now, but last weeks i had some personal issues. I am much grateful for your replies, and i have already understand the problem leptrich, you understood my doughts. With this type of matrix next one can generate mass for the 1st generation and even sufficient CP violation.

Thanks for the the answer. In that article they give the same explanation, and the matrix is almost equal. I continua to don´t see any clues about what means that expression and moreover under what transformations that matrix is invariant.

Hello,I read an article about fo generating mass for the first two generations of quarks by breaking the flavour permutation symmetry S3. In the top of the page 5 of the following article: http://arxiv.org/pdf/hep-ph/9807214v2.pdf , they mention that "Mq1 transforms as the mixed symmetry term...

The only problem is that in terms of group theory representation, for me, that does not makes sense.

Hello, why one can use a bi-doublet scalar field (2,2) under SU(2)L x SU(2)R ? In terms of group theory, we should have only triplets (3,1) or (1,3) since 2 x 2=3+1 ? But in left right symmetric models, indeed yukawa coupling are formed with bi-doublet scalars. Best regards

Thanks for your answer. Well, I want a a line element time dependent, and where the plane ( t,ρ) is orthogonal to the ( ø,z) plane . Probably the line element will be of the form of: ds^2= A(t,ρ) ( dt^2-dρ^2)-... I have some doubts on the rest of the expression, as well on the determination...

Thanks of your time with this question. My problem is that Bondi metric has de following form: ds^2= (\frac{V}{r} e^{2\beta}-U^2r^2e^{2\gamma})du^2 + 2e^{2\beta} dudr+ 2Ur^2 e^{2\gamma} du d\theta -r^2 (e^{2\gamma} d\theta^2 + e^{-2 \gamma} sin^2 \theta d \phi^2) All these...

Hello, Some knows how to Bondi deduce his radiating line element? I read some papers and there isn't any hint about hit. Best regards

Hello, What is the most general cylindrically symmetric line element in the canonical form? Best regards.

Hello, try to use general geodesic equation and then simplify the connection term with the definition of covariant derivative. Read about affine parameters. I'll try to post a solution attempt. ( Ray D'inverno is a nice book has introduction to general relativity aspects).