Abstract. We explore the meromorphic structure of the ζ-function associated to
the boundary eigenvalue problem of a modified Sturm-Liouville operator subject to
spectral dependent boundary conditions at one end of a segment of length l. We
find that it presents isolated simple poles which follow the general rule valid for second
order differential subject to standard local boundary...
The effective cross section of double parton scattering in proton collisions has been measured by many experiments with rather different results.
Motivated by this fact, we assumed that the parton correlations in the transverse plane are different whether we have valence or sea partons.
With this simple approach, we were able to fit the available data and found that sea parton pairs...
Double Parton Scattering (DPS) is an important mechanism through which we can investigate the parton distributions of the proton and the nucleus. Although we know that such scatterings occur in high-energy collisions, the formalism describing them lacks answers to questions such as: Is there a universal effective cross section? To address such questions, we investigate DPS in ultraperipheral...
