The University of Kansas: Journals@KU
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Diurnal predation on a Common House Rat (Rattus rattus) by a Spot-tailed Pitviper (Trimeresurus erythrurus) in northeastern Bangladesh
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Vector meson production in ultraperipheral heavy ion collisions
Full text linkWe review model calculations of exclusive vector meson production in ultraperipheral heavy ion collisions. We highlight differences and similarities between different dipole models and leading twist shadowing calculations. Recent color glass condensate calculations are presented with focus on effects from nuclear structure and azimuthal anisotropies driven by interference effects
Impact parameter dependence of dilepton production: Wigner function approach and the role of photon polarizations
Full text linkWe revisit the Wigner function approach to the impact parameter dependent dilepton pair production developed in [M. Klusek-Gawenda, WS, A. Szczurek Phys. Lett. B 814 (2021) 136114]. We study the distribution of the angle between difference and sum of lepton transverse momenta, and show how it relates to the orbital angular momentum of leptons. The dependence on impact paramter is discussed, and we also present the different components of the Wigner function in the t-channel. A brief comparison to similar angular distributions in diffractive quark pair production will be presented
Photoproduction of J/ψ and dileptons in Pb–Pb collisions with nuclear overlap
Full text linkPhoton-photon reactions and the production of J/ψ meson through photonuclear reactions have been extensively studied in ultra-peripheral heavy-ion collisions, in which the impact parameter is larger than twice the nuclear radius. In recent years, coherently photoproduced J/ψ and dilepton production via photon-photon interactions have also been observed in nucleus-nucleus (A–A) collisions with nuclear overlap. The former can help to constrain the nuclear gluon distributions at low Bjorken-x and high energy, while the latter could be used to further map the electromagnetic fields produced in heavy-ion collisions. In addition, these measurements can shed light on the theory behind photon-induced reactions in A–A collisions with nuclear overlap, including possible interactions of the measured probes with the formed and fast expanding quark-gluon plasma.
Since the produced quarkonium is expected to keep the polarization of the incoming photon due to s-channel helicity conservation, the photoproduction origin of the J/ψ yield excess at very low transverse momentum, pT, can be confirmed by the measurement of the J/ψ polarization.
The ALICE detector can perform quarkonium production measurements at both mid (|y|<0.9) and forward (2.5<y<4) rapidities down to pT = 0. In the following, the new ALICE measurements of the J/ψ y-differential cross section and the first polarization results of coherently photoproduced J/ψ via the dimuon decay channel at forward rapidity in Pb–Pb collisions at √sNN = 5.02 TeV are reported. Additionally, the measurement of an excess with respect to expectations from hadronic production in the dielectron yield, at low mass and pT, at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV, is presented. The results are compared with available theoretical models
Reckoning with Ecologies of Violence in Campus (Counter)Protests
Full text linkUniversities have become a focal point for contestation over the meaning of free speech as well as sites of violent protests connected to white supremacist speakers and anti-racist, anti-fascist activism. This paper investigates incarnations of violence operating during the recent resurgence of white supremacist organizing and counter-protest on college campuses, focusing on the case of the white supremacist attacks at the University of Virginia (U.Va.) and Charlottesville during August 2017 that culminated in the vehicular manslaughter of Heather Heyer. Past research often conceptualizes collective violence through a non/violent binary. In contrast, we argue that a relational and ecological model of violences (pl.) in social movement activity provides a stronger analysis. Using historical methods, we investigate three entangled incarnations of violence that contribute to contemporary moments of social dis/order: the offensive violence of white supremacists, the passive institutional violence of the (white supremacist) University, and active defensive violence on the part of counter-protesters in opposition to white supremacy. In conclusion, we discuss implications for research on violence in movements and contemporary (anti-)racist organizing, arguing that sociologists need to embrace more complex understandings of how violences manifest to address concerns about public safety
65 degrees of bee thermal biology
Full text linkAddressing global bee declines requires multidisciplinary, coordinated, and collaborative action. This contribution highlights ongoing efforts to build multidisciplinary and international partnerships among researchers from the University of Wyoming, the University of Kansas, and the Universidade de São Paulo, Brazil, spanning nearly 65 degrees of latitude, to explore how bees respond to changing temperatures. This document summarizes key insights from a mini-symposium held on May 12, 2025, and preliminary collaborative studies conducted between May 8 and 15, 2025, at the Universidade de São Paulo. The mini-symposium brought together faculty and researchers from different Brazilian universities, along with both undergraduate and graduate students, creating a dynamic exchange of ideas across institutions and career stages. Emerging themes from the discussions included the inconsistent use of terminology and methods for assessing thermal biology, critical gaps in taxonomic and life-history coverage, restricted access to expensive equipment and the need for more accessible approaches, and the opportunity to incorporate alternative metrics of thermal tolerance in future studies.
Resumo. Ações coordenadas, colaborativas e multidisciplinares são essenciais para enfrentar o declínio global das abelhas. Esta contribuição destaca um esforço atual para estabelecer parcerias internacionais e interdisciplinares entre pesquisadores da Universidade de Wyoming, da Universidade do Kansas e da Universidade de São Paulo (Brasil), abrangendo quase 65 graus de latitude, com o objetivo de investigar como as abelhas respondem às mudanças de temperatura. O documento apresenta os principais insights de um mini-simpósio realizado em 12 de maio de 2025, bem como de estudos colaborativos preliminares conduzidos entre 8 e 15 de maio de 2025, na Universidade de São Paulo. O evento reuniu docentes e pesquisadores de diversas universidades brasileiras, além de alunos de graduação e pós-graduação, promovendo uma troca rica e dinâmica de ideias entre diferentes instituições e níveis de experiência acadêmica. Entre os temas emergentes das discussões destacaram-se: o uso inconsistente de terminologias e métodos na avaliação da biologia térmica, lacunas significativas na cobertura taxonômica e de história de vida, o acesso limitado a equipamentos caros e a consequente necessidade de metodologias mais acessíveis e a oportunidade de incorporar métricas alternativas de tolerância térmica em pesquisas futuras
