This thesis presents a search for resonant and standard model non-resonant di-Higgs production in theb¯bτ +τ− decay channel, with the semi-leptonic ditau state. The search uses data collected by the ATLAS experiment at the LHC of pp-collisions at √s=13 TeV during 2015 and 2016, corresponding to an instantaneous luminosity of 36:1fb-1. No deviation from the Standard Model prediction is observed. For the non-resonant standard model di-Higgs production an upper limit is set on the cross-section compared to the Standard Model prediction,σ/σSM< 24:44 @ 95%CL. Upper limits are set on the cross-section times branching ratio for the resonant searches, where the results are interpreted in terms of constraints on a 2HDM heavy scalar Higgs model and a Randall-Sundrum Kaluza-Klein graviton model. The use of Support Vector Machines is investigated and benchmarked against the nominal results of the Boosted Decision Tree multivariate analysis, in pursuit of potential future improvements.

archives@tulane.edu / This thesis focuses on a seldom-studied illuminated manuscript of Dante Alighieri’s (1265–1321) Commedia, known as Yates Thompson MS 36 (ca. 1450) in the British Library, whose Paradiso miniatures have been attributed to Giovanni di Paolo. One of the most visionary artists of the Quattrocento school of painting in Siena, his oeuvre – and the Yates Thompson codex in particular – begs for sustained critical interpretation beyond issues of connoisseurship, provenance, and stylistic analysis. The manuscript presents a remarkably rare instance in which Quattrocento Sienese pictorial and narrative strategies have been preserved in a complete suite of images, and the recent resurgence of interest in Giovanni di Paolo presents an opportune time to return to his work and to reassess the historiographic legacy that has shelved the art of fifteenth-century Siena as too “fantastic and marvellous” to be critically investigated on its own terms. Focusing particularly on issues of narrative, vision and optical theory, perspective, and the intersections between art, astronomy, and cartography, this thesis takes Giovanni di Paolo's representation of pictorial space as a locus of inquiry into the collaborative nature of manuscript production in the late medieval period, as intellectual circles shifted from spiritual concerns based on biblical tradition to empiricism. More broadly, this consideration of fifteenth-century Sienese visual culture vis à vis twenty-first scholarly concerns reconfigures Giovanni di Paolo's Paradiso miniatures as a referential assemblage or "web of images" that was inextricably linked to a complex entanglement of creative associations, and asks what it means to study an illuminated manuscript that was collaboratively authored over time. / 1 / Shannah Rose

One unresolved question in hadronic physics is the origin of large transverse single-spin asymmetries, AN, observed in hadron production from high-energy polarized-proton collisions. Collinear perturbative Quantum Chromodynamics (pQCD) predicts that AN should scale with the quark mass, however, experiments have since reported large AN for inclusive hadron production. Recent measurements from RHIC experiments show examples of these asymmetries at forward angles in a kinematic region where pQCD cross-section calculations reasonably agree with measured cross-sections. Disentangling dynamical contributions to AN from hadro-production requires moving beyond inclusive measurements. One possibility is to investigate asymmetries in two-particle correlations due to Interference Fragmentation Functions (IFF) and the Sivers effect. In 2008, RHIC dedicated a portion of the run to transversely polarized proton collisions at sqrt(s) = 200 GeV. STAR was equipped with a Foward Meson Spectrometer (FMS) and a Forward Time Projection Chamber (FTPC), overlapping in the pseudorapidity range of 2.5 < eta &lt; 4. By analyzing neutral pions with the FMS correlated with charged particles from the FTPC, correlation asymmetries can be measured at kinematics where large inclusive asymmetries have been measured. Correlations are measured for pi^0's with 2 &lt; pT, pi^0 &lt; 5 GeV/c and associated charged particles in two ranges of transverse momentum: 1 &lt; pT, ch &lt; 2 GeV/c and 0.5 &lt; pT, ch &lt; 1 GeV/c. IFF and Sivers asymmetries manifest themselves through the correlation of two particles from the same jet. These events are selected through a cut on the pair radius, delta R. Gain non-uniformities and electronics failures have resulted in large holes in trigger acceptance and associated particle acceptance, respectively. This non-uniform acceptance allows the Sivers and IFF effects to mix and distort the raw asymmetries. Techniques are developed to measure this leak-through by means of unpolarized yields and event weighting. They result in small corrections to the asymmetries. IFF and Sivers asymmetries both for xF > 0 and for xF &lt; 0 are reported for forward-angle pi^0-charged particle correlations from polarized-proton collisions at sqrt(s) = 200 GeV. Asymmetries are shown corrected for full underlying-event and pileup backgrounds, as well as corrected only for pile-up contributions. It appears the asymmetries are less sensitive to delta R when corrected for the full underlying-event background. Unfortunately, statistics limitations preclude a firm conclusion.

Thesis (M.A.)--Zheng zhi zuo zhan xue xiao. / Includes bibliographical references (p. 143-148).

Habilitationsschrift--Freie Universität, Berlin. / "Literatur-und Abkürzungsverzeichnis": p. 69-[74].

Thesis (Ph. D.)--University of California, Berkeley. / eContent provider-neutral record in process. Description based on print version record. Bibliography; leaves 378-391.

Habilitationsschrift--Freie Universität, Berlin. / "Literatur-und Abkürzungsverzeichnis": p. 69-[74].

Thesis (M.C.S.)--Regent College, 1995. / Chinese text and title page, with English summary and bibliography of English references. Author's name taken from microfiche header; English title from English summary. Includes bibliographical references (leaves 92-95).

Thesis (M.A.)--Zheng zhi zuo zhan xue xiao. / Bibliography: p. 143-148.

Thesis (Ph. D.)--University of Minnesota, 1985. / Typescript. Includes bibliographical references (leaves 300-310).