Wojciech Slominski

Photon emissivity of strange matter

Abstract Two mechanisms contributing to the photon emissivity of strange quark matter are considered. Equilibrium radiation through the surface is dominant at T⪸2 × 10 10 K , while below this temperature the Bremsstrahlung radiation from the surface layer prevails.

General Mass Scheme for Jet Production in DIS

We propose a method for calculating DIS jet production cross sections in QCD at NLO accuracy with consistent treatment of heavy quarks. The scheme relies on the dipole subtraction method for jets, which we extend to all possible initial state splittings with heavy partons, so that the Aivazis-Collins-Olness-Tung massive collinear factorization scheme (ACOT) can be applied. As a first check of the formalism we recover the ACOT result for the heavy quark structure function using a dedicated Monte Carlo program.

Structure functions of W and Z bosons

Abstract The strong content of the weak intermediate bosons is investigated at energies much higher than their masses. The evolution equations of quark and gluon densities are constructed and solved asymptotically. Strong flavour and spin dependence is observed. The special role of longitudinally polarized bosons is discussed.

Unintegrated Gluon Distributions for Forward Jets at the LHC

We test several BFKL-like evolution equations for unintegrated gluon distributions against forward‐central dijet production at the LHC. Our study is based on fitting the evolution scenarios to the LHC data using the high energy factorization approach. Thus, as a by-product, we obtain a set of LHC-motivated unintegrated gluon distributions ready to use. We utilize this application by calculating azimuthal decorrelations for forward‐central dijet production and compare with the existing data.

Intermittency in galaxy distribution

The method of scaled factorial moments of normalized distribution is used to analyze the galaxy distribution in the Universe. Two types of galaxy subsamples and two ways of dividing the space into cells are considered for CfA catalogue. In all cases we observe strong intermittency in the galaxy distribution. We estimate also the fractal dimensionsD2 ...,D5.

Spin effects in the electron structure functions

Abstract.The electron structure functions are studied in polarized e + e- scattering. The formulae for longitudinally and transversely polarized electrons are presented. The smallness of the electron mass leads to negligible cross-sections and asymmetries in some cases. Positivity constraints on the structure functions and parton densities are constructed and discussed. The cross-section asymmetries at very high energies, where the inclusion of all elecroweak bosons is necessary, are calculated. Numerical examples, using the asymptotic solutions for the parton densities inside the electron, are presented.

Higgs boson production and weak boson structure

The influence of the QCD structure of the weak bosons on the Higgs boson production ine-p scattering is studied. The energy and Higgs boson mass dependence of the cross-section, following from the new contributions, is calculated.

Strange matter at finite temperatures

Abstract We present the properties of strange matter at temperatures between 0 and 30 MeV. Finite temperature introduces in most cases only small corrections of quantities describing strange matter, however electron density and Coulomb barrier change significantly. The pressure dependence of the system is also presented.

Critical size of SQM bubbles inside neutron matter

Abstract A nucleation of strange quark matter (SQM) phase in the neutron matter medium at zero temperature and finite pressure is considered. Bubble formation is calculated within MIT bag model for pressures typical for a neutron star interior. The critical bubble size decreases rapidly with pressure, reaching minimum at p ∼ 20 MeV/fm3.

Scalar quark mass splitting effects in lepton-proton interactions

The mass splitting of scalar quarks of the same flavour leads to parity violation in deep inelastic scattering, even at one photon exchange level. This effect modifies the asymmetries measured in the polarized lepton-proton scattering. We calculate them in leading order and give numerical estimates of their shapes.