ar X iv : h ep - p h / 02 11 28 5 v 1 1 8 N ov 2 00 2 1 η nucleus optical potential in a chiral unitary approach

ar X iv : h ep - p h / 02 05 02 8 v 1 2 M ay 2 00 2 η in the nuclear medium within a chiral unitary approach

η in the nuclear medium within a chiral unitary approach Abstract The self-energy of an η meson in the nuclear medium is calculated in a chiral unitary approach. A coupled channel Bethe-Salpeter equation is solved to obtain the effective η-N interaction in the medium. The base model reproduces well the free space π-N elastic and inelastic scattering at the η-N threshold or N * (1535) region. Th...

ar X iv : h ep - p h / 02 11 28 0 v 1 1 8 N ov 2 00 2 Two - Loop Electroweak Corrections to ∆

The two-loop electroweak bosonic correction to the muon lifetime is computed using methods of asymptotic expansion. Combined with previous calculations this completes the full two-loop correction to ∆r in the Standard Model.

ar X iv : h ep - t h / 02 11 04 8 v 1 7 N ov 2 00 2 Inflation , Quantum Cosmology and the Anthropic Principle 1

ar X iv : h ep - p h / 03 11 20 3 v 1 1 5 N ov 2 00 3 Is the quark - mixing matrix moduli symmetric ?

If the unitary quarkmixing matrix, V , is moduli symmetric then it depends on three real parameters. This means that there is a relation between the four parameters needed to parametrize a general V . It is shown that there exists a very simple relation involving |V11|, |V33|, ρ and η. This relation is compared with the present experimental data. It is concluded that a moduli symmetric V is not...

ar X iv : h ep - e x / 02 11 06 9 v 1 2 8 N ov 2 00 2 Jet Production at CDF Mario Mart́ınez