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Asymmetries in W^+/- and Z^0/gamma^* production at the Tevatron
No full textThe authors describe a measurement of the charge asymmetry of electrons from W{sup {+-}} boson decays using p{bar p} {yields} W {yields} e{nu} events. They also present a measurement of the forward-backward charge asymmetry of electron-positron pairs resulting from the process p{bar p} {yields} Z{sup 0}/{gamma}* {yields} e{sup +}e{sup -}, from which they extract the Z{sup 0}-quark and Z{sup 0}-electron coupling constants and measure the sensitivity of the CDF experiment to these couplings. These analyses use integrated luminosities of 170 pb{sup -1} and 72 pb{sup -1}, respectively, of data collected by the CDF Run II detector at the Fermilab Tevatron
Electroweak measurements from the Tevatron
No full textI review the status of electroweak measurements including W and Z bosons produced at the Tevatron. I describe measurements of the W-boson mass, the W production charge asymmetry, diboson production and limits on anomalous
trilinear gauge couplings. These analyses use integrated luminosities ranging from 200 pb−1 to 3.6 fb−1 of data collected by the CDF and DØ Run-II detectors at the Fermilab Tevatron
Search for new resonances decaying to pairs of merged diphotons with the CMS detector at √S = 13 TEV
No full textA search is presented for an extended Higgs sector with a massive resonance (X) decayingto a pair of spin-0 bosons (φ) that themselves decay to pairs of photons (γ). The search is
based on CERN LHC proton-proton collision data at √s = 13 TeV, collected with the CMS
detector, corresponding to an integrated luminosity of 138 fb−1. The analysis considers
masses mX between 0.3 and 3 TeV, and values of mφ for which the ratio mφ /mX is between
0.5 and 2.5%. In this range, the two photons from each φ boson are expected to spatially
overlap significantly in the detector. Two neural networks are created, based on computer
vision techniques, to first classify events containing such merged diphotons and then to
reconstruct the mass of the diphoton object. The mass spectra are analyzed for the presence
of new resonances and are found to be consistent with standard model expectations. Model-
specific limits are set at 95% confidence level on the production cross section for X → φφ →
(γγ)(γγ) as a function of the resonance masses, where the X → φφ and φ → γγ branching
fractions are assumed to be 100%. Observed (expected) limits range from 0.03–1.06 fb (0.03–
0.79 fb) for the masses considered, representing the most sensitive search in this channel.Ph.D.Includes bibliographical reference
Surgical Results of Bleb Revision With Scleral Patch Graft for Late-Onset Bleb Complications
No full textAuthor Correction: A portrait of the Higgs boson by the CMS experiment ten years after the discovery
No full textIn the version of this article initially published, CMS Collaboration author names, affiliations and acknowledgements were omitted and have now been included in the HTML and PDF versions of the articl
Measurements of the Rare Decay KL→e+e-e+e-
No full textThe rare decay KL→e+e-e+e- proceeds via a two-virtual-photon intermediate state with internal photon conversions to e+e- pairs. A measurement of the branching ratio of the rare decay at the Fermilab experiment is reported. In addition, a study of CP symmetry in this decay and the first analysis of a KLτ*τ* form factor is presented
Macular hole closure after peribulbar steroid injection
No full textPURPOSE: To report the closure of a macular hole after a peribulbar corticosteroid injection in a patient with anterior uveitis associated with human leukocyte antigen B*27. DESIGN: Interventional case report. METHODS: The patient was evaluated by comprehensive ophthalmic check-up and optical coherence tomography. RESULTS: A healthy 50-year-old woman presented to our service with active human leukocyte antigen B*27, associated anterior uveitis, macular hole in the right eye and macular edema in the left eye. Visual acuity was 20/200 in both eyes. Peribulbar injections of triamcinolone acetonide were administered in both eyes. Three months later, visual acuity improved to 20/50 in both eyes, and the uveitis was in complete remission. Optical coherence tomography verified that the macular hole in the right eye was closed. CONCLUSIONS: Inflammation and macular edema might be contributing factors in macular hole formation in patients with uveitis. This case indicates that treatment of inflammation and macular edema might lead to macular hole closure in similar cases. (C) 2003 by Elsevier Inc. All rights reserved
Measurement of the B-c(+) meson lifetime using the decay mode B-c(+)-\u3e J/psi e(+)nu(e)
No full textWe present a measurement of the B-c(+) meson lifetime in the decay mode B-c(+) -\u3e J/psi e(+) nu(e) using the Collider Detector at Fermilab II detector at the Fermilab Tevatron Collider. From a sample of about 360 pb(-1) of pp collisions at root s = 1.96 TeV, we reconstruct J/psi e(+) pairs with invariant mass in the kinematically allowed range 4 \u3c M-J/psi e \u3c 6 GeV/c(2). A fit to the decay-length distribution of 238 signal events yields a measured B-c(+) meson lifetime of 0.463(-0.065)(+0.073) (stat) +/- 0.036 (syst) ps
Interfaces in supersymmetric field theories
No full textSupersymmetry has proven to be a valuable tool in the study of non-perturbative dynamics in quantum eld theory, gravity and string theory. In this thesis we consider supersymmetric interfaces. Interfaces are defects de ned by spatially changing coupling constants. Interfaces can be used to probe the non-perturbative low energy dynamics of an underlying supersymmetric quantum eld theory. We study interfaces in a set of four-dimensional quantum eld theories with N = 2 supersymmetry known as theories of class S. Using these defects we probe the spin content of the spectrum of quantum states saturating the Bogomolnyi-Prasad-Sommerfeld bound. We also apply supersymmetric defects to the construction of knot and link invariants via quantum eld theory. We associate to a knot - presented as a tangle - an interface de ned by a spatially varying superpotential in a 2d supersymmetric Landau-Ginzburg model. We construct explicitly the Hilbert space of ground states on this interface as the cohomology of a nilpotent supercharge and prove that this Hilbert space is bi-graded by integers and is an invariant of the knot (or link). In explicit examples we show that the corresponding Poincar e polynomial coincides with the Poincar e polynomial of the renowned Khovanov homology that categori es the Jones polynomial.Ph.D.Includes bibliographical referencesby Dmitrii Galakho
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