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We calculate the leading quark mass corrections of order mqlog(mq), mq and m3/2 q to the vector meson decay constants within heavy vector meson chiral perturbation theory. We discuss the issue of electromagnetic gauge invariance and the heavy mass expansion. Reasonably good fits to the observed decay constants are obtained.
We calculate next-to-leading order (NLO) QCD corrections to electroweak Higgs boson plus three jet production. Both vector boson fusion (VBF) and Higgs-strahlung type contributions are included along with all interferences. The calculation is implemented within the MATCHBOX NLO framework of the HERWIG++ event generator.
Denna uppsats berör revisorns skadeståndsansvar enligt 29 kap. aktiebolagslagen (2005:551), ABL. En revisor som när han eller hon fullgör sitt uppdrag uppsåtligen eller av oaktsamhet skadar bolaget ska ersätta skadan. Detsamma gäller om skadan drabbar en aktieägare eller någon annan genom en överträdelse av ABL, tillämplig lag om årsredovisning eller bolagsordningen. Uppsatsen fokuserar huvudsakliThis essay is about the auditor’s liability for damages according to the Swedish Companies Act (2005:551). If an auditor, due to intent or negligence, causes damages to the company during his or her mission as an auditor, he or she shall indemnify the company. The same is true if the auditor causes damages to a shareholder or someone else due to a violation of the Companies Act, the applicable law
We calculate the finite volume corrections to meson masses and decay constants in two and three flavour Chiral Perturbation Theory to two-loop order. The analytical results are compared with the existing result for the pion mass in two-flavour ChPT and the partial results for the other quantities. We present numerical results for all quantities.
I give an overview of the calculations done in three-flavour Chiral perturbation theory at next-to-next-to-leading order with an emphasis on those relevant for an improvement in the accuracy of the measurement of Vus. It is pointed out that all needed low energy constants can be obtained from experiment via the scalar form-factor in Kl3 decays
Människans intresse för rymden har alltid varit stort. Man har antagit att andra planetsystem, om de existerar, ser ut som vårt: med mindre stenplaneter i banor närmast stjärnan och gas-samt isjättar i de yttre banorna. Idag känner man till drygt 2 000 exoplaneter, d.v.s., planeter som kretsar kring andra stjärnor än solen. Man vet även att vissa av dem saknar motsvarighet i solsystemet, t. ex., hOver the past two decades many discoveries of exoplanets have been made, which have drawn much attention to extrasolar planetary systems. In this work we study the composition of these systems and search for analogues of the Solar System. We considered the planets in the database at exoplanet.eu. The search of solar-like systems required these planets to be classified. The classification was perf
A BFKL dipole model, and its event generator DIPSY, developed for pp collisions is extended to initial states of heavy ion collisions. All tuning is made for gamma*p and pp inclusive and minimum bias data, leaving the extension to heavy ions model independent. Eccentricities are calculated and compared to other common inital state models.
The F and G form-factors of Kℓ4 and the quark condensates are calculated to O(p6) in Chiral Perturbation theory (CHPT). Full formulas are presented as much as possible. A full refit of most of the O(p4) CHPT parameters is done with a discussion of all inputs and underlying assumptions. We discuss the consequences for the vacuum expectation values, decay constants, pseudoscalar masses and π - π sca
På senare år har det skett en bred förskjutning i synen på barn- och föräldrarätt. Ett starkare barnrättsperspektiv har etablerats inom svensk rätt och politik. Flera ändringar har gjorts i föräldrabalken. En av dessa ändringar återfinns i 6 kap. 19 § tredje stycket föräldrabalken. I proposition 2020/21:150 föreslog den dåvarande regeringen en lagstadgad tidsgräns på fyra månader när det kommer ti
A wealth of theoretical and phenomenological information about Quantum Chromodynamics at short and long distances collected so far in major collider measurements has profound implications in cosmology. In this review, we give a brief discussion of major implications of strongly-coupled dynamics of quarks and gluons and effects of their collective motion in physics of early Universe and in astrophy
In a two Higgs-doublet model with D4 flavor symmetry we establish a relation between tanβ and the Cabibbo angle. Due to a small number of parameters, the quark Yukawa sector of the model is very predictive. The flavor changing neutral currents are small enough to allow for relatively light nonstandard scalars to pass through the flavor constraints.
We study 3-dimensional SU(2) lattice gauge theory with respect to dimensional reduction. By Monte Carlo calculations we find that this reduction is valid to a good approximation (within ≈10%). The adjoint string tension is found to scale approximately. We also compare the adjoint string tension with a string theory.
Rätten att inte straffas två gånger för samma sak finns både i svensk rätt, Europakonventionen och EU:s rättighetsstadga. Det har länge varit omdiskuterat hur de svenska skattetilläggsreglerna förhåller sig till denna rättighet eftersom skattetillägg tidigare kunde utdömas parallellt med en straffrättslig påföljd. Trots att man kanske hade kunnat ana hur det förhöll sig med utgångspunkt i tidigare
En av de stora olösta problemen inom astronomi är hur galaxer bildas och utvecklas och i synnerhet hur våran egen Galax, Vintergatan, formades och utvecklades. Det är ett problem som astronomer har försökt lösa i åtskilliga årtionden, men först på senare tid har instrumenten blivit så pass nogranna att vi har möjligheten lösa detta problemet. Med moderna observationer har vi idag en bra bild av huThe formation and evolution of the Milky Way is a subject under constant debate. Our understanding of the hierarchical structure for- mation of the Galaxy is limited and as it stands now, there are several different competeing models that aim to explain the observations. The initial aim of this project was to study vertical metallicity gradi- ents in the thick disk whilst applying a previously unu
It is Future Week at Lund University as we release our fifth podcast episode. This week Nic and Rebecca have invited Joanna Lewis to the mic and chat with her about the European Spallation Source, which is under construction here in Lund . Thereafter they take a closer look at SN1572.
BACKGROUND: There is little consensus on a standard approach to analysing bone scan images. The Bone Scan Index (BSI) is predictive of survival in patients with progressive prostate cancer (PCa), but the popularity of this metric is hampered by the tedium of the manual calculation. OBJECTIVE: Develop a fully automated method of quantifying the BSI and determining the clinical value of automated
I review formation channels for blue stragglers. I consider how they may be produced via collisions between two single main-sequence stars, or via collisions during encounters involving binary stars. Further, I discuss how blue stragglers may be produced via the evolution of isolated binaries. Observations of globular clusters suggest that both mechanisms are contributing.
The cosmic origin of fluorine, the ninth element of the periodic table, is still under debate. The reason for this fact is the large difficulties in observing stellar diagnostic lines, which can be used for the determination of the fluorine abundance in stars. Here we discuss some recent work on the chemical evolution of fluorine in the Milky Way and discuss the main contributors to the cosmic bud
