Measurements of differential production cross sections for a Z boson in association with jets in pp collisions at root s=8 TeV

Peer reviewe

Charged-particle nuclear modification factors in PbPb and pPb collisions at √=sNN=5.02 TeV

The spectra of charged particles produced within the pseudorapidity window |η| < 1 at √ sNN = 5.02 TeV are measured using 404 µb −1 of PbPb and 27.4 pb−1 of pp data collected by the CMS detector at the LHC in 2015. The spectra are presented over the transverse momentum ranges spanning 0.5 < pT < 400 GeV in pp and 0.7 < pT < 400 GeV in PbPb collisions. The corresponding nuclear modification factor, RAA, is measured in bins of collision centrality. The RAA in the 5% most central collisions shows a maximal suppression by a factor of 7–8 in the pT region of 6–9 GeV. This dip is followed by an increase, which continues up to the highest pT measured, and approaches unity in the vicinity of pT = 200 GeV. The RAA is compared to theoretical predictions and earlier experimental results at lower collision energies. The newly measured pp spectrum is combined with the pPb spectrum previously published by the CMS collaboration to construct the pPb nuclear modification factor, RpA, up to 120 GeV. For pT > 20 GeV, RpA exhibits weak momentum dependence and shows a moderate enhancement above unity

Family context of low-income young children and their self-regulation in the United States and Turkey

The current study examines the contributions of family context (e.g. life events, home environments) to low-income preschool children’s self-regulation (behaviour regulation and executive function) in the United States and Turkey. Participants were 1139 low-income children (486 from the U.S. and 653 from Turkey) and their parents. Children’s self-regulation was assessed via structured tasks and family related variables such as life events, home environments, and demographic information were assessed via parent-report. Results from regression analyses showed that child’s age-predicted behaviour regulation and executive function in children both from the U.S. and Turkey. Child gender, favouring girls predicted behaviour regulation and executive function and parent–child verbal interaction was associated with behaviour regulation only in the U.S. Family structure (favouring living in a two-parent household) predicted executive function and economic change predicted behaviour regulation in Turkey. Contributions and future directions were also discussed. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group

VERITAS: the Very Energetic Radiation Imaging Telescope Array System

The Very Energetic Radiation Imaging Telescope Array System (VERITAS) is the major next generation imaging atmospheric Cherenkov gamma-ray telescope in the western hemisphere and will be located in southern Arizona nearby Kitt Peak National Observatory. The VERITAS observatory will provide unprecedented sensitivity to photon energies between 50 GeV and 50 TeV. The first stage is an array of four telescopes to be fully operational in early 2006, with an expansion to seven telescopes envisioned for 2008. The construction of a prototype telescope is underway, for which first light is expected in Fall 2003. The technical concept is outlined and a progress report is given. (C) 2004 Published by Elsevier B.V