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High statistics measurements of the diffractive reduced cross section $\sigma_r^D$ from the H1 collaboration are presented which make use of two different experimental methods to achieve the largest possible coverage of the kinematic phase…

High Energy Physics - Experiment · Physics 2013-11-05 Alice Valkárová

A summary of recent results from ZEUS is presented. New ZEUS results from HERA-1 data include Structure Functions, QCD fits, analysis of hadronic final states, precision measurements of alpha_s, production of heavy flavor mesons and baryons…

High Energy Physics - Experiment · Physics 2007-05-23 Wesley H. Smith , U. Wisconsin

The main b-physics trigger algorithm used by the LHCb experiment is the so-called topological trigger. The topological trigger selects vertices which are a) detached from the primary proton-proton collision and b) compatible with coming…

Instrumentation and Detectors · Physics 2016-01-20 Tatiana Likhomanenko , Philip Ilten , Egor Khairullin , Alex Rogozhnikov , Andrey Ustyuzhanin , Michael Williams

The Level-1 trigger of the CMS experiment at CERN has been designed to select proton-proton interactions whose final state includes signatures of new physics in the form of high transverse energy electrons, photons, jets, or high missing…

Instrumentation and Detectors · Physics 2008-10-23 C. Foudas

This article summarizes a talk presented at the SLAC Summer Institute 2000, SLAC, Stanford, USA. The HERA ep collider allows the measurement of the proton structure and tests of the Standard Model in a large region of phase space that has…

High Energy Physics - Experiment · Physics 2007-05-23 T. Hadig

As online trigger for events containing $\Lambda$ hyperons in p+p collisions at $\mathrm{3.1\,GeV}$ a silicon-based device has been designed and built. This system has been integrated close to the target region within the FOPI spectrometer…

Instrumentation and Detectors · Physics 2019-08-14 Robert Muenzer , Martin Berger , Laura Fabbietti

The first level trigger of the HADES spectrometer is studied for the heavy-ion collision systems Au+Au and Ne+Ne. The trigger efficiency for central events is given in dependence of the imposed charged particle multiplicity condition. The…

Nuclear Experiment · Physics 2007-05-23 R. Schicker , H. Tsertos

A summary of experimental contributions to HSQCD 2005 is given. This includes results from the four HERA experiments H1, ZEUS, HERMES and HERA-B, as well as results from the Tevatron (D0), the CERN hyperon beam (WA98), from RHIC (PHENIX),…

High Energy Physics - Experiment · Physics 2007-05-23 Joerg Gayler

The BTeV trigger system will be very ambitious, reconstructing almost all tracks in real time at 15 million 2-TeV ${\bar p} p$ interactions per second. The goal is substantially-increased sensitivity to rare effects in heavy-quark physics…

High Energy Physics - Experiment · Physics 2007-05-23 Daniel M. Kaplan

We investigate the possibility of measuring the H^\pm W^\mp Z^0 vertex from the single $H^\pm$ production process via WZ fusion at the CERN Large Hadron Collider (LHC). This vertex strongly depends on the structure of the Higgs sector in…

High Energy Physics - Phenomenology · Physics 2008-11-26 Eri Asakawa , Shinya Kanemura , Junichi Kanzaki

We give an outline of the LHCb trigger strategy and performance. The first and second levels (called L0 and L1) are discussed in some detail, while the subsequent Higher Level Trigger (HLT), which is currently under development, is only…

High Energy Physics - Experiment · Physics 2010-11-11 Massimiliano Ferro-Luzzi

The HADES first level trigger is studied for the system p+Ni at a beam energy of 2 AGeV. The timing properties of the trigger signal are reported. The efficiency loss due to deadtime is specified. A trigger requirement of a time overlap…

Nuclear Experiment · Physics 2007-05-23 R. Schicker , H. Tsertos

An extended study of exclusive vector meson production in e,p interactions has been performed by the H1 and the ZEUS collaborations at the HERA collider. Recent measurements are reported and discussed within the framework of the dipole…

High Energy Physics - Experiment · Physics 2007-05-23 A. Kreisel

A trigger system of general function is designed using the commercial module CAEN V2495 for heavy ion nuclear reaction experiment at Fermi energies. The system has been applied and verified on CSHINE (Compact Spectrometer for Heavy IoN…

Recent results on diffraction at HERA, as measured by the H1 and ZEUS collaborations, are reviewed. Results on the photon-proton total hadronic cross section, on vector meson production both at small and large photon virtuality and on…

High Energy Physics - Phenomenology · Physics 2016-09-06 Nicolò Cartiglia

A review is presented of recent results in QCD from the H1 and ZEUS experiments at HERA, emphasizing the use of higher order calculations to describe the data.

High Energy Physics - Experiment · Physics 2008-11-26 Peter J Bussey

An experimental study of the vortex-induced-vibration of a flexibly mounted rigid square cylinder in a uniform airflow is presented. For this high mass ratio configuration, transverse oscillations are measured in detail for reduced…

Fluid Dynamics · Physics 2024-01-10 X. Amandolese , P. Hémon

This paper describes the CMS trigger system and its performance during Run 1 of the LHC. The trigger system consists of two levels designed to select events of potential physics interest from a GHz (MHz) interaction rate of proton-proton…

Instrumentation and Detectors · Physics 2017-01-26 CMS Collaboration

The electron-proton collider HERA is being upgraded to provide higher luminosity from the end of the year 2001. In order to enhance the selectivity on exclusive processes a Fast Track Trigger (FTT) with high momentum resolution is being…

High Energy Physics - Experiment · Physics 2014-11-17 D. Meer , D. Muller , J. Muller , A. Schoning , Ch. Wissing

Many explanations for the excess high-Q^2 $e^+p \to e^+X$ events from H1 and ZEUS at HERA have been proposed each with criticisms. We propose a new method to distinguish different models by looking at a new distribution which is insensitive…

High Energy Physics - Phenomenology · Physics 2009-10-30 Zhen Cao , Xiao-Gang He , Bruce McKellar