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In this contribution we analyse double vector meson production in photon - hadron (γh) interactions at pp/pA/AA collisions and present predictions for ρρ, J/ψJ/ψ and ρJ/ψ production considering the double scattering mechanism. We estimate the total cross sections and compare our results with the predictions for double vector meson production in γγ interactions at hadronic c olliders. Our results d
Chiral Perturbation Theory is a useful tool to aid in performing the various extrapolations needed in lattice QCD calculations of physical quantities. These include extrapolations in quark mass, finite lattice spacing and finite size of the lattice. Especially the latter will becomemore important when the quark masses on the lattice become smaller. Here we develop the needed two-loop integrals at
The discovery of collectivity in proton–proton collisions, is one of the most puzzling outcomes from the first two runs at LHC, as it points to the possibility of creation of a Quark–Gluon Plasma, earlier believed to only be created in heavy ion collisions. One key observation from heavy ion collisions is still not observed in proton–proton, namely jet-quenching. In this letter it is shown how a m
We investigate the next-to-leading-colour (NLC) contributions to the colour matrix in the fundamental and the colour-flow decompositions for tree-level processes with all gluons, one quark pair and two quark pairs. By analytical examination of the colour factors, we find the non-zero elements in the colour matrix at NLC. At this colour order, together with the symmetry of the phase-space, it is re
In this thesis, the mass singularities occurring in the cross-section of electron scattering processes are investigated. Two types of scatterings are studied: Quantum Electrodynamics (QED) scatterings, and Perturbative Quantum Gravity (PQG) scatterings. We show how mass singularities in QED and PQG cancel when real and virtual diagrams are included in the scattering cross-section. We find that in
We consider the diffractive Drell-Yan process in proton-(anti) proton collisions at high energies in the color dipole approach. The calculations are performed at forward rapidities of the leptonic pair. The effect of eikonalization of the universal "bare" dipole-target elastic amplitude in the saturation regime takes into account the principal part of the gap survival probability. We present predi
This thesis investigates a possible extension to the Standard Model: the Chirally Symmetric Technicolor Model. The motivation is to explain the origin of the electroweak interaction scale by introducing a new interaction. The thesis is based on the two-flavour Technicolor model presented in ”Chiral-Symmetric Technicolor with Standard Model Higgs boson” by Pasechnik et. al. [1], and extends it to t
Popular Abstract in Swedish Denna avhandling baseras på fenomenologiska förutsägelser för högenergetiska partikelkollisioner från två olika teoretiska modeller. De två första artiklarna handlar om osäkerheter i exklusiva reaktioner av typen proton + proton -> proton + proton + Higgs. De fyra andra artiklarna behandlar gravitationell spriding och produktion av svarta hål i modeller med stora extrThis thesis is based on phenomenological predictions for high energy particle collisions from two different theoretical models. The first two papers deal with uncertainties in exclusive reactions of type proton + proton -> proton + proton + Higgs. The other four papers concern gravitational scattering and black hole production in the scenario of large extra dimensions.
Using a decapitation ischemia model, we studied translocation of proteins to and from the cytosol in normothermic (NT) and hypothermic (HT) rat brains. 2D gel analysis identified 74 proteins whose cytosolic level changed significantly after 15 min of ischemia. HT preserved the cytosolic levels of several glycolytic enzymes, as well as many plasticity related proteins, otherwise decreased following
The Galactic Center is one of the most dense stellar environments in the Galaxy and is considered to be a plausible place to harbor many neutron stars. In this brief review, we summarize observational efforts in search of neutron stars within a few degrees about the Galactic Center. Up to 10% of Galactic neutron stars may reside in this central region and it is possible that more than a thousand n
Atomic spectroscopy plays an important role in fusion research and extensive knowledge of atomic parameters is needed for plasma diagnostics. However, a magnetically confined hot plasma can be considered as a spectroscopic fight source which has some unique properties, including high temperature and low density. Fusion devices can therefore be used to tackle problems in basic atomic physics. This
Based on t he Boltzmann Machine concept, we derive alear ning algorithm in which time-consuming stochastic measurementsof correlations a re replaced by solutions to dete rminist ic mean fieldtheory equ ations. T he method is applied to t he XOR (exclusive-or ),encoder, and line sym metry problems with substantial success. Weobserve speedup facto rs ranging from 10 to 30 for these ap plicat ionsand
Using geopotential height data we find a strong correlation between theelectric field strength E of the solar wind and pressure variations inthe stratosphere and troposphere. The large-scale evolution of E seemsto influence the stratospheric pressure in both hemispheres with theexception of the polar regions. For the tropospheric pressure theinfluence is concentrated to an area in the northern Atl
Markus Lahtinen, Lecturer and Researcher at the Department of Informatics at Lund University School of Economics and Management, assumed the position of chairman for the think tank Säkerhet för Näringsliv och Samhälle (SNOS, Security for Industry and Society). The SNOS network is a leading actor in security and safety discussions. Through opinion journalism and news dissemination via its platforms
https://www.lusem.lu.se/article/markus-lahtinen-new-chairman-sakerhet-naringsliv-och-samhalle - 2026-05-29
Uppsatsens syfte är att utreda under vilka förutsättningar en enskild kan göra gällande ett avtal om islamisk brudpenning, mahr, i svensk domstol. I ljuset av NJA 2017 s. 168 anläggs såväl ett rättsutvecklingsperspektiv som ett individperspektiv för att utröna hur rättsläget har förändrats och vad konsekvenserna av dessa förändringar innebär för den enskilde. Uppsatsen beskriver det syfte och deThe purpose of the essay is to investigate under which circumstances an individual is able to ensure the validity of an agreement regarding the Muslim dower, mahr, in a Swedish court of law. In the light of NJA 2017 p. 168, the recent change of the legal position and its consequences for an individual are examined, from a development of the law perspective and an individual perspective. The essa
