Recent content by kuon

You can see here that it is (-1). http://pdglive.lbl.gov/Rsummary.brl?nodein=S011&sub=Yr&return=MXXX020 Note that for mesons, parity only depends on the orbital angular momentum L as P=(-1)^(L+1) but since J=0 for K0, and the parity is negative, that implies that L=0 and s=0 are...

sorry, I don't understand the question very well, what do you mean with the neutrino mass eigenstate coupling to the SU(2) doublet? Which doublet? coupling? The flavor symmetry is broken by the Yukawa terms, what do you mean not imposing? All I can tell you is this, I hope it helps: 1. In the...

I think though that there are some models where RS is used where the quarks are composite... Maybe somebody with more knowledge on the subject can say something about it...

The biggest cross section in the LHC is for gluon-gluon fusion

For example if a neutron and an antineutron collide one of the quarks of the neutron can interact with an antiquark of the antinuetron producing a gluon, then this one leads to a pair of quarks that hadronize. Quarks and antiquarks of different flavors can anihilate, for example an s bar and a d.

At tree level photons don't interact. But at one loop they can interact through virtual electrons.

I'm sorry if what I say is not right, or I haven't understood it right, - In 3+1 D we have the photon with spin 1 => it has two polarizations. Our Gauge field A_\mu has 4 components => We have two extra degrees of freedom. => We need to get rid of the extra 2 fixing the gauge. 1. The...

The force that binds protons and neutrons together is actually a remnant of the strong force that binds de quarks inside the neutron and the proton. Particles can be classified between leptons and hadrons. Leptons don't feel the strong force, and hadrons do. Electrons are a type of...

What makes you think it isn't an electromagnetic decay? I would say that it is.

Do you know any good reference where I could read more about the QCD mass gap in more detail? (Book, chapter, revieiw?) Thanks a lot! :)

The beginning to understand gravitational redshift is the Equivalence Principle. "In a local inertial frame the laws of physics are given by the laws of special relativity" Now we have to reference frames S1 and S2, S1 situated at some distance above S2. They are in a gravitational...

That's how it is referred in all the papers I've read... examples: http://arxiv.org/abs/hep-th/0606130 http://arxiv.org/pdf/hep-th/0505189 I'm sorry if it caused misunderstandings.

You are right, if I don't know why I can't be sure. :) Thanks for the reference, I'll take a look at it. About the hair of the black hole. Well I was talking about scalar hair. I was reading some paper where they say they use a hairy black hole, with scalar hair, so I thought it ought...

You can have hairy black holes, that's for sure. The question is that I don't know why. :(

http://casa.colorado.edu/~ajsh/sr/wheel.html