Stop the Top Background of the Stop Search

The main background for the supersymmetric stop direct production search comes from Standard Model ttbar events. For the single-lepton search channel, we introduce a few kinematic variables to further suppress this background by focusing on its dileptonic and semileptonic topologies. All are defined to have end points in the background, but not signal distributions. They can substantially improve the stop signal significance and mass reach when combined with traditional kinematic variables such as the total missing transverse energy. Among them, our variable M^W_T2 has the best overall performance because it uses all available kinematic information, including the on-shell mass of both W's. We see 20%-30% improvement on the discovery significance and estimate that the 8 TeV LHC run with 20 fb-1 of data would be able to reach an exclusion limit of 650-700 GeV for direct stop production, as long as the stop decays dominantly to the top quark and a light stable neutralino. Most of the mass range required for the supersymmetric solution of the naturalness problem in the standard scenario can be covered.Comment: 16 pages, 5 figure

Europe should stop taxing innovation

In this Policy Brief, Bruegel Senior Fellow Bruno van Pottelsberghe makes the argument in favour of a single EU patent system. The author explains that the absence of a one-stop-shop for EU-wide patents hampers innovation and will pose serious challenges to small and medium-sized companies in the face of global competition. This paper analyses how a uniform patent system can sustain long-term competitiveness and boost growth and thereby achieve EU2020 targets. It makes policy recommendations in four key areas of a single patent system - language, complexity, affordability and governance.   

Dipeptidyl peptidase-1 inhibition in patients hospitalised with COVID-19 : a multicentre, double-blind, randomised, parallel-group, placebo-controlled trial

Acknowledgments This study was funded by an investigator-initiated research grant from Insmed (Bridgewater, NJ, USA). The authors acknowledge Stephen Senn (Edinburgh, UK) for independent statistical advice and Alex McConnachie (University of Glasgow, Glasgow, UK), Aran Singanayagam (Imperial College, London, UK), Oriol Sibila (Hospital Clínic Barcelona, Barcelona, Spain), and Petra Rauchhaus (University of Dundee, Dundee, UK) for serving as the independent data monitoring committee. The STOP-COVID19 study was designated an urgent public health priority study by the UK National Institute for Health and Care Research. The authors acknowledge the funding and logistical support from the UK National Institute for Health and Care Research. unding Sponsored by the University of Dundee and supported through an Investigator Initiated Research award from Insmed, Bridgewater, NJ; STOP-COVID19 trial. Funding Sponsored by the University of Dundee and supported through an Investigator Initiated Research award from Insmed, Bridgewater, NJ; STOP-COVID19 trial.Peer reviewedPublisher PD

Stop Ducking

When I joined the Phi Kappa Psi fraternity, a small voice in my head kept saying that it was a bad idea. “Don’t become part of the system, Stephen.” But I defended my decision and believed in the idea of Phi Kappa Psi returning to campus with a clean slate. The possibilities far outweighed the cons. I dreamt of the potential of what Phi Psi could become and how we would stand above the traditional expectations of Greek organizations. I wanted to tell everyone about this dream and I couldn’t wait to find like-minded people. I felt inspired by how we might define ourselves. [excerpt

One Stop Student Services Newsletter: Fall 2020

https://digitalcommons.morris.umn.edu/onestop/1001/thumbnail.jp

STREAM Journal, Vol. 4, No. 3, pp 1-19. July-September 2005

CONTENTS: One-stop Aqua Shops: an emerging phenomenon in Eastern India, by Graham Haylor, Rubu Mukerjee and S.D. Tripathi. Ranchi One-stop Aqua Shop, by Ashish Kumar. Kaipara One-stop Aqua Shop, by Kuddus Ansary. Bilenjore One-stop Aqua Shop, by Bhawani Sankar Panda. Patnagarh One-stop Aqua Shop, by Dipti Behera and Lingraj Otta. Using bar-coding in a One-stop Aqua Shop, by Christopher Keating

Sneaky light stop

A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the Standard Model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this `stealth stop' scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples