Rethinking the Irish Diaspora

Rethinking the Irish Diaspora

Author: Johanne Devlin Trew

Publisher: Springer

Published: 2018-03-13

Total Pages: 298

ISBN-13: 3319407848

DOWNLOAD EBOOK

This book provides scholarly perspectives on a range of timely concerns in Irish diaspora studies. It offers a focal point for fresh interchanges and theoretical insights on questions of identity, Irishness, historiography and the academy’s role in all of these. In doing so, it chimes with the significant public debates on Irish and Irish emigrant identities that have emerged from Ireland’s The Gathering initiative (2013) and that continue to reverberate throughout the Decade of Centenaries (2012-2023) in Ireland, North and South. In ten chapters of new research on key areas of concern in this field, the book sustains a conversation centred on three core questions: what is diaspora in the Irish context and who does it include/exclude? What is the view of Ireland and Northern Ireland from the diaspora? How can new perspectives in the academy engage with a more rigorous and probing theorisation of these concerns? This thought-provoking work will appeal to students and scholars of history, geography, literature, sociology, tourism studies and Irish studies.


Measuring Cross Sections Using a Sag Tape

Measuring Cross Sections Using a Sag Tape

Author: Gary A. Ray

Publisher:

Published: 1979

Total Pages: 20

ISBN-13:

DOWNLOAD EBOOK

A procedure was developed for surveying cross sections using a sag tape with unequal end elevations. The procedure is as accurate as traditional engineer's level surveys, is faster and easier, and can be programed for a digital computer by following the flow diagram which is provided.


The First Measurement of the Differential Cross-section of Electroweak W[plus][minus]W[plus][minus]jj Production at 13 TeV with the ATLAS Detector

The First Measurement of the Differential Cross-section of Electroweak W[plus][minus]W[plus][minus]jj Production at 13 TeV with the ATLAS Detector

Author: Shalu Solomon

Publisher:

Published: 2023

Total Pages: 0

ISBN-13:

DOWNLOAD EBOOK

Abstract: Vector boson scattering is one of the recent remarkable observations at the Large Hadron Collider. The longitudinal polarization modes of the massive vector bosons are strongly tied to the electroweak symmetry breaking mechanism. With the Standard Model predicted Higgs boson playing a crucial role in regularizing the scattering amplitude of these longitudinally polarized bosons, vector boson scattering is a pivotal process in experimentally probing the symmetry breaking mechanism. A golden channel for measuring vector boson scattering at the collider is the electroweak production of two $W$ bosons with the same electric charges. Owing to its largest quark- to gluon- induced production ratio among other di-boson combinations, the process was also the first target of the ATLAS vector boson scattering program, with evidence made in 2014 and observation in 2019. This thesis presents the first measurement of the differential cross-section with the ATLAS experiment at $\sqrt{s}=13$\,TeV using 139\,fb$^{-1}$ datasets of proton-proton collisions. The process is studied in the leptonic decay channels of the $W$ bosons, effectively suppressing many Standard Model backgrounds. The process $pp \rightarrow l^{\pm} \nu l^{\pm} \nu jj $ is measured with the final state consisting of two leptons of like charges, two jets, and missing transverse energy. The characteristic vector boson scattering signature of two tagging jets, with a large di-jet invariant mass, separated by large angles, is used to tag electroweak-induced production. A combination of Monte Carlo-based predictions and data-driven approaches is used to estimate the various backgrounds. A statistical model of profile likelihood is used to constrain the background predictions and reduce the uncertainties following which the events are unfolded, and the cross-section is extracted. The fiducial differential cross-sections are measured in the leptonic channel as a function of several kinematic variables and are found to be consistent with the Standard Model predictions within uncertainties. An experimental precision of 10.2\% is achieved for the fiducial cross-section, and the measurement is unprecedented in precision and granularity for the process. The integrated fiducial cross-section is $3.51 \pm 0.27\,\text{(stat)}\,\pm 0.23\,\text{(syst)}\,\text{fb}$ and agrees with the leading order prediction of $2.97^{+0.28}_{-0.24}\,\text{fb} $ simulated by MadGraph+Herwig7 within uncertainties