Letter from Geraldine Ferraro to Claudio Signorile, Italian Minister of Transportation

Reply from Geraldine Ferraro to Claudio Signorile, the Italian Minister of Transportation.https://ir.lawnet.fordham.edu/vice_presidential_campaign_correspondence_1984_international/1072/thumbnail.jp

Letter from Claudio Signorile, the Italian Minister of Transportation, to Geraldine Ferraro

Letter from Claudio Signorile, the Italian Minister of Transportation, to Geraldine Ferraro. Letter includes a Library of Congress translation.https://ir.lawnet.fordham.edu/vice_presidential_campaign_correspondence_1984_international/1337/thumbnail.jp

Mixed QCD-Electroweak corrections to the Drell-Yan process in the high invariant mass region

We report on the calculation of mixed QCD-electroweak corrections to the neutral-current- mediated production of a pair of massless leptons in the high invariant mass region. We find these corrections to be $O$(−1%) at relatively low values of the dilepton invariant mass, around 200 GeV. For invariant masses larger than 1 TeV, we observe that mixed corrections are larger, $O$(−3%), and are well reproduced by the product of next-to-leading order QCD and electroweak corrections. These results emphasise the importance of mixed QCD-electroweak corrections in Drell-Yan process studies, where percent-level precision is being targeted

Factorisation and Subtraction beyond NLO

We provide a general method to construct local infrared subtraction counterterms for unresolved radiative contributions to differential cross sections, to any order in perturbation theory. We start from the factorised structure of virtual corrections to scattering amplitudes, where soft and collinear divergences are organised in gauge-invariant matrix elements of fields and Wilson lines, and we define radiative eikonal form factors and jet functions which are fully differential in the radiation phase space, and can be shown to cancel virtual poles upon integration by using completeness relations and general theorems on the cancellation of infrared singularities. Our method reproduces known results at NLO and NNLO, and yields substantial simplifications in the organisation of the subtraction procedure, which will help in the construction of efficient subtraction algorithms at higher orders.Comment: 34 pages, 3 figure

The impact of regionalisation and europeanization on regional development policies in Italy: policy innovation and path dependence

Scholars have proposed and investigated a view of social relations as social networks and therefore the role of public policy in creating new networks and new social and economic relations. Are different incumbent institutional settings a relevant variable to explain different regional policies responses to Regionalization and Europeanization? I will address this question with regard to the regional policy that was initiated in Italy in 1950 and that represented the country’s attempt to improve its economic and geographic cohesion. The hypothesis is that, within a devolution process, different adaptation to regionalization and Europeanization pressures are correlated to “path dependence” from incumbent institutional settings. Specific attention is dedicated to the role of “paradigms” in the processes analysed. This, in turn could generate different devolution outcomes, in terms of discrepancy between formal and effective outcomes. Devolution is analysed in terms of institutional change and policy (regional policy) change. Institutional change is operationalized in terms of changes in polity and administrative variables, and policy change is investigated through variables representing formal (policy issues, i.e. design and responsibility) and effective (financial, i.e. uses and sources) dynamics under the two different pressures for change identified: regionalization and Europeanization of regional policies. The research proposed is pertinent and important in the context of European integration where national policies have been restructured due to, on the one hand, regionalization—i.e., the transfer downward to the sub-national level—of policies formerly handled at the national level and, on the other, “Europeanization” or the transfer of policies upwards to the European level. This thesis investigates the dynamics of the “paradigm and policy shift” that took place within Italian regional policy between 1950 when the policy began and 1992 when the policy was officially terminated due to a dual transfer of the policy upward to the European level with the co-financing of cohesion policy and the transfer downward to the role of the regions as management authorities for the operational programmes that were responsible for the bulk of Italian regional funds

Mixture or mosaic? Genetic patterns in UK grey squirrels support a human-mediated ‘long-jump’ invasion mechanism

Aim Clarifying whether multiple introductions of a species remain relatively isolated or merge and interbreed is essential for understanding the dynamics of invasion processes. Multiple introductions from different sources can result in a mixture of genetically distinct populations, increasing the total genetic diversity. This mixing can resolve the ‘genetic paradox’, whereby in spite of the relatively small numbers of introduced individuals, the augmented diversity due to this mixing increases adaptability and the ability of the species to spread in new environments. Here, we aim to assess whether the expansion of a successful invader, the Eastern grey squirrel, was partly driven by the merger of multiple introductions and the effects of such a merger on diversity. Location UK, Ireland. Methods We analysed the genetic variation at 12 microsatellite loci of 381 individuals sampled from one historical and 14 modern populations of grey squirrels. Results Our data revealed that current UK population structure resembles a mosaic, with minimal interpopulation mixing and each element reflecting the genetic make-up of historic introductions. The genetic diversity of each examined population was lower than a US population or a historical UK population. Numbers of releases in a county did not correlate with county-level genetic diversity. Inbreeding coefficients remain high, and effective population sizes remain small. Main conclusions Our results support the conclusion that rapid and large-scale expansion in this species in the UK was not driven by a genetic mixing of multiple introduced populations with a single expansion front, but was promoted by repeated translocations of small propagules. Our results have implications for the management of grey squirrels and other invasive species and also demonstrate how invaders can overcome the genetic paradox, if spread is facilitated by human-mediated dispersal

Non-factorisable contributions to t-channel single-top production at the LHC and FCC

Single top quark is mainly produced through the t-channel W boson exchange ${q+b→q′+t}$ at LHC. This process probes Wtb vertex directly and can be used to measure the CKM matrix element $V_{tb}$ or to constrain the bottom quark PDF. The non-factorisable contributions are the last missing piece of the NNLO corrections. In these proceedings, we discuss in a first part the ostensible importance of such corrections and the obtention of the different relevant amplitudes. In the second part, recently published results at the energy of the LHC are compared to new results for proton-proton collision at ${100TeV}$, the energy of the FCC

Strongly-ordered infrared limits for subtraction counterterms from factorisation

After a brief introduction to the problem of subtraction of infrared divergences for high-order collider observables, we present a preliminary study of strongly-ordered soft and collinear multiple radiation from the point of view of factorisation. We show that the matrix elements of fields and Wilson lines that describe soft and collinear radiation in factorised scattering amplitudes can be re-factorised in strongly-ordered limits, providing a systematic method to compute them, to characterise their singularity structure, and to build local subtraction counterterms for strongly-ordered configurations. Our results provide tools for a detailed organisation of subtraction algorithms, in principle to all orders in perturbation theory

Strongly-ordered infrared limits for subtraction counterterms from factorisation

After a brief introduction to the problem of subtraction of infrared divergences for high-order collider observables, we present a preliminary study of strongly-ordered soft and collinear multiple radiation from the point of view of factorisation. We show that the matrix elements of fields and Wilson lines that describe soft and collinear radiation in factorised scattering amplitudes can be re-factorised in strongly-ordered limits, providing a systematic method to compute them, to characterise their singularity structure, and to build local subtraction counterterms for strongly-ordered configurations. Our results provide tools for a detailed organisation of subtraction algorithms, in principle to all orders in perturbation theory