ar X iv : h ep - p h / 98 07 21 1 v 3 8 J ul 1 99 8 Challenges of Nuclear Shadowing in DIS

ar X iv : h ep - p h / 98 07 21 1 v 2 3 J ul 1 99 8 Challenges of Nuclear Shadowing in DIS

Nuclear shadowing in DIS at moderately small x is suppressed by the nuclear formfactor and depends on the effective mass of a hadronic fluctuation of the virtual photon. We propose a solution to the problems (i) of how to combine a definite transverse size of the fluctuation with a definite effective mass, and (ii) of how to include the nuclear formfactor in the higher multiple scattering terms...

ar X iv : h ep - p h / 98 07 21 1 v 1 1 J ul 1 99 8 Challenges of Nuclear Shadowing in DIS

Nuclear shadowing in DIS at moderately small x is suppressed by the nuclear formfactor and depends on the effective mass of a hadronic fluctuation of the virtual photon. We propose a solution to the problems (i) of how to combine a definite transverse size of the fluctuation with a definite effective mass, and (ii) of how to include the nuclear formfactor in the higher multiple scattering terms...

ar X iv : h ep - p h / 98 07 20 1 v 1 1 J ul 1 99 8 UM - P - 97 / 21 Fermion Masses and Mixing in 331 Models with Horizontal Symmetry

The possibility of adding an SU (2) horizontal symmetry to the 331 model is studied. It is found that simple, anomaly-free fermion assignments can be made which lead to plausible results for fermion masses and mixings. In particular, all particles of the first generation are massless at tree-level, and the CKM matrix acquires a realistic form.

ar X iv : h ep - p h / 98 07 25 2 v 1 6 J ul 1 99 8 Studying thermodynamics in heavy ion collisions

We discuss the possibility to measure entropy of the system created in heavy ion collisions using the Ma coincidence method.

ar X iv : h ep - p h / 98 05 30 4 v 1 1 3 M ay 1 99 8 Λ b → Λ c P ( V ) Nonleptonic Weak Decays