Connecting physical resonant amplitudes and lattice QCD

We present a determination of the isovector, $P$-wave $\pi\pi$ scattering phase shift obtained by extrapolating recent lattice QCD results from the Hadron Spectrum Collaboration using $m_\pi =236$ MeV. The finite volume spectra are described using extensions of L\"uscher's method to determine the infinite volume Unitarized Chiral Perturbation Theory scattering amplitude. We exploit the pion mass dependence of this effective theory to obtain the scattering amplitude at $m_\pi= 140$ MeV. The scattering phase shift is found to be in good agreement with experiment up to center of mass energies of 1.2 GeV. The analytic continuation of the scattering amplitude to the complex plane yields a $\rho$-resonance pole at $E_\rho= \left[755(2)(1)(^{20}_{02})-\frac{i}{2}\,129(3)(1)(^{7}_{1})\right]~{\rm MeV}$. The techniques presented illustrate a possible pathway towards connecting lattice QCD observables of few-body, strongly interacting systems to experimentally accessible quantities.Comment: 8 pages, 6 figures, equivalent to published version, added two appendices and a figur

Impulse approximation in the n p --> d pi^0 reaction reexamined

The impulse approximation (one-body operator) in the n p --> d pi^0 reaction is reexamined with emphasis on the issues of reducibility and recoil corrections. An inconsistency when one pion exchange is included in the production operator is demonstrated and then resolved via the introduction of "wave function corrections" which nearly vanish for static nucleon propagators. Inclusion of the recoil corrections to the nucleon propagators is found to change the magnitude and sign of the impulse production amplitude, worsening agreement with the experimental cross section by approximately 30%. A cutoff is used to account for the phenomenological nature of the external wave functions, and is found to have a significant impact up to approximately 2.5 GeV.Comment: Published versio

Introduction: Special issue celebrating the life and work of Larry E. Smith

This brief introduction provides a short biography of Professor Larry Eugene Smith, who passed away in December 2014. The introduction also discusses the contents of this special issue, which pays tribute to the life and work of Professor Smith. All of the sixteen substantive articles have been contributed by Larry’s friends and colleagues from the US as well as from many other societies worldwide. Larry’s personal and professional reach was truly international in scope, as this collection of articles bears direct witness.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/146462/1/weng12325_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/146462/2/weng12325.pd

Brexit and the future of English in Europe

In this issue of the journal we present a forum on a current topic of key sociolinguistic interest to both linguists and the wider population in Europe and elsewhere, that is, the expected future of the English language in a reconfigured Europe after the impending British exit (or ‘Brexit’) from Europe. The key document discussed in this forum is a position paper from Marko Modiano, which has drawn a number of responses from leading linguists across the field of world Englishes. We are sincerely thankful to Modiano for initiating this forum, and grateful also to all those that have contributed their responses to his article, which has resulted, we believe, in an insightful and lively discussion of the sociolinguistics of English and multilingualism in contemporary Europe.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/139103/1/weng12263.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/139103/2/weng12263_am.pd

Braj B. Kachru’s scholarly publications: A bibliography

Although best known for his work on world Englishes, Braj Kachru was a truly original thinker, whose academic writings included influential publications on English linguistics, Indian languages, but much else besides, including applied linguistics, bilingualism and multilingualism, code‐mixing and switching, cross‐cultural communication, language policy, linguistic variation, literary creativity, sociolinguistics, and the politics of language. Braj B. Kachru was a renaissance scholar of immense stature, whose work brought together Indian and English linguistics with the cultural perspectives of both Asia and the West, and inspired scholars worldwide to adopt fresh perspectives on so many language issues.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/150583/1/weng12411_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/150583/2/weng12411.pd

Initial impacts of the transformation of a large introductory lab course focused on developing experimental skills and expert epistemology

Recently, there has been increased attention to improving laboratory instruction at all levels. At the introductory level, research results have shown differing levels of success based on the nature of the desired learning outcomes. In response to these findings, the University of Colorado's introductory physics lab course was transformed to improve students' development of experimental skills and experimental physics epistemology. We describe the details of the transformation process and initial self-reported learning gains from the first implementation of the transformed course

Introduction: Special issue on the life and work of Braj B. Kachru

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/150579/1/weng12413.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/150579/2/weng12413_am.pd