Publications by authors named "G Velev"
Article Synopsis
- The Higgs boson, crucial for the standard model of particle physics, helps mediate the weak force between elementary particles, and its mass is closely regulated by the model's symmetries.
- Researchers measured the mass of the boson using data from proton-antiproton collisions at the Tevatron collider, accumulating about 4 million candidates to achieve a very precise measurement.
- This new mass measurement shows a significant discrepancy with what is expected from the standard model, suggesting potential gaps in our current understanding of particle physics.
A search for the exotic meson X(5568) decaying into the B_{s}^{0}π^{±} final state is performed using data corresponding to 9.6 fb^{-1} from pp[over ¯] collisions at sqrt[s]=1960 GeV recorded by the Collider Detector at Fermilab. No evidence for this state is found and an upper limit of 6.
View Article and Find Full Text PDFThe CDF and D0 experiments at the Fermilab Tevatron have measured the asymmetry between yields of forward- and backward-produced top and antitop quarks based on their rapidity difference and the asymmetry between their decay leptons. These measurements use the full data sets collected in proton-antiproton collisions at a center-of-mass energy of sqrt[s]=1.96 TeV.
View Article and Find Full Text PDFIntroduction: The continuous evolution of laparoscopic surgery and the ambition of better cosmetic results raise the need for less invasive procedures. The umbilicus represents a natural scar and constitutes a well-healing site of access to the peritoneal cavity. Single-access Transumbilical Laparoscopy (SATL) is gaining popularity and can be an alternative surgical treatment for acute appendicitis.
View Article and Find Full Text PDFArticle Synopsis
- * The measured t-channel cross section is σ_{t}=2.25_{-0.31}^{+0.29} pb, along with a two-dimensional analysis of s- and t-channel cross sections.
- * The combined s+t channel cross section is σ_{s+t}=3.30_{-0.40}^{+0.52} pb, and the measurement of the top-to-bottom quark coupling yields |V_{tb}|=1.02_{-0.