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We derive the light-front wave function (LFWF) representation of the γ∗γ∗→ηc(1S),ηc(2S) transition form factor F(Q12,Q22) for two virtual photons in the initial state. For the LFWF, we use different models obtained from the solution of the Schrödinger equation for a variety of cc̄ potentials. We compare our results to the BABAR experimental data for the ηc(1S) transition form factor, for one real
The specific shear viscosity, η/s, of the quark-gluon plasma formed in ultrarelativistic heavy-ion collisions at RHIC and LHC is estimated based on the progressive longitudinal broadening of transverse momentum two-particle correlators, G2, reported as a function of collision centrality by the STAR and ALICE experiments. Estimates are computed as a function of collision centrality using the Gavin
This paper focuses on the radio wave propagation through energy saving windows. These panes have a metallic shielding that keeps the heat inside the building during winter and outside during summer. Unfortunately, this covering also has an opaque behaviour at microwave frequencies. A design of energy saving window panes with high transmission at 900MHz and 1800MHz is presented. The high transmissi
Population fluctuations and synchrony influence population persistence; species with larger fluctuations and more synchronised population fluctuations face higher extinction risks. Here, we analyse the effect of diet specialisation, mobility, length of the flight period, and distance to the northern edge of the species' distribution in relation to between-year population fluctuations and synchrony
A parallel procedure for an effective optimization of relative position and orientation between two or more fragments has been implemented in the MOLCAS program package. By design, the procedure does not perturb the electronic structure of a system under the study. The original composite system is divided into frozen fragments and internal coordinates linking those fragments are the only optimized
Trust is considered one of the main preconditions for good democratic governance. Trust in political systems facilitates effective policy implementation and rule due to increased government compliance. Due to the importance of trust for democratic political systems, in this paper I study the factors that cause trust for the EU, focusing on the relationship between citizens trust for national insti
Under de senaste decennierna har antalet diagnostiserade cancerfall stadigt ökat. För patienter med den ödesdigra hjärntumören glioblastom har överlevnadsstatistiken dock stått still. Forskare i Lund och Köpenhamn tros nu ha funnit pusselbiten som kan komma att ändra på detta. Cancern är en av de dödligaste sjukdomarna i Sverige och stod för 26 procent av alla dödsfall år 2017. Däremot har man unPurpose: Improvements in mortality rate of glioblastoma patients have been limited during the past decades, due to the tumor’s rapidly growing and infiltrative behavior and resistance to current therapy. Recent findings show that higher brain mean dose strongly correlates with inferior overall survival and that local recurrences mainly occur centrally in previously irradiated regions. This project
At large number of colors, N-c quarks in baryons are in a mean field of definite space and flavor symmetry. We write down the general Lorentz and flavor structure of the mean field, and derive the Dirac equation for quarks in that field. The resulting baryon resonances exhibit a hierarchy of scales: the crude mass is O(N-c), the intrinsic quark excitations are O(1), and each intrinsic quark state
Drell-Yan pair production off nuclei is an ideal tool to test the cold nuclear effects occurring before a hard collision since no interaction in the final state is expected, neither energy loss or absorption. We present for the first time a comprehensive study of the nucleus-to-nucleon production ratio (the nuclear modification factor) within the color dipole approach using the Green function form
We study the initial-state interactions (non-coherence) and nuclear shadowing (coherence) effects in the Drell-Yan pair production process in p+Pb collisions at the LHC energies. The analysis of the nuclear suppression, RpA < 1, has been performed in the color dipole approach in the large coherence length approximation. The Z0 boson contribution relevant at large dilepton invariant masses has been
In this paper, we analyze how to continuously adjust the speed in a supply chain with stochastic demand. For each unit (e.g., truckload, shipping container) in the chain, one must decide at which speed it should be moved downstream, given the state of the system, to minimize total supply chain costs. We decompose the problem into a set of one-dimensional subproblems that can be easily solved and c
The two perspectives of autonomous driving and new active safety in vehicles are complementary, and both hold promise to reduce the number of accidents and associated severe or fatal injuries. They both coincide in the recent interest in finding alternatives to traditional yaw-control systems that can utilize the full potential of the vehicle. By considering the control problem as that of lane-kee
From the basis of optimal control, a closed-loop controller for autonomous vehicle maneuvers at-the-limit of friction is developed.The controller exploits that the optimal solution tends to be close to the friction limit of the tires.This observation allows for simplifications that enable the use of a proportional feedback control in the control loop,which provides a smooth trajectory promising fo
In a murine model of platelet alloimmunization, we examined the definitive role that mononuclear cells (MC) have in modulating platelet immunity by using platelets from severe combined immunodeficient (SCID) mice. CB.17 (H-2(d)) SCID or BALB/c (H-2(d)) mouse platelets were transfused weekly into fully allogeneic CBA (H-2(k)) mice and antidonor antibodies measured by flow cytometry. MC levels in BA
Different starchy foods are frequently consumed in the Mexican diet. Some of them were developed by Pre-Columbian Mesoamerican civilizations. Until today, common beans (Phaseolus vulgaris), tortillas made with maize (Zea mays) and related maize-based products are some of the main staple foods. Additionally, wheat-based foods are also important starch sources, incorporated in different dishes. This
