Mr
Filimon Gournaris
(UCL)
01/04/2008, 11:00
The top quark threshold at the ILC offers unique opportunities to make measurements of the top quark properties (mass, width, couplings) to an unprecedented precision. I will describe how the measurement will be done, give an overview of the main experimental issues and present recent developments leading to a full simulation of the precision reach at the ILC.
Mr
Erik Devetak
(Oxford University / RAL)
01/04/2008, 11:13
After a brief description of the theory behind Wtb anomalous coupling we will follow with an overview of the vertexing and flavour tagging tools developed. Finally we will outline the usage of flavour tagging and charge reconstruction in the anomalous top coupling analysis.
Ms
Talini Pinto Jayawardena
(STFC Rutherford Appleton Laboratory)
01/04/2008, 11:25
Reconstruction and analysis of simulated top quark pair events for the future 500 GeV electron positron linear collider ILC are discussed. A detailed GEANT-based simulation of the ILC detector concept LDC is used. The reconstruction is performed with realistic tracking, vertex reconstruction, particle flow and jet finding algorithms. Reconstructed properties of the top quark are compared with...
Mr
John Dale
(University of Oxford)
01/04/2008, 11:37
The Linear Collider Alignment and Survey (LiCAS) group has developed a Rapid Tunnel Reference Surveyor (RTRS), which will survey the reference network of the ILC to a high accuracy. By measuring small overlapping sections of the tunnel, the LiCAS RTRS will be capable of surveying the entire reference network in the main linac tunnel. The LiCAS RTRS has several measurement subsystems, one...
Dr
Graeme Burt
(Lancaster University/ Cockcroft)
01/04/2008, 11:49
Crab cavities have been proposed at a number of particle colliders to increase the luminosity in the presence of a crossing angle, including the LHC upgrade, ILC and CLIC colliders. These RF devices rotate the incoming bunches prior to collision in order to provide a head-on collision. However if the phase and amplitude is sufficiently unstable the crab cavities can cause a decrease rather...
Mr
Lawrence Deacon
(John Adams Institute at RHUL, London, U.K.)
01/04/2008, 12:01
Transverse beam size diagnostics systems are essential for luminosity and beam property optimisation of low emittance beams. The laser-wire (LW) system in the extraction line at the Accelerator Test Facility (ATF) at KEK aims to achieve micron-scale electron beam profile measurements. This is done by colliding high energy laser pulses with an electron beam and monitoring the inverse Compton...
Dr
Anthony Hartin
(Oxford University)
01/04/2008, 12:13
Depolarization effects at the interaction point of a linear collider are analyzed. The main effects occur during the intense beam-beam interactions. Higher-order effects as well as theoretical improvements in the derivation of suitable equations are given. Updates on existing simulation programs are reported. Numerical results for the design of the International Linear Collider (ILC)
and the...
Ms
Christine Clarke
(Oxford University)
01/04/2008, 12:25
Experiment T-488 at SLAC, End Station A recorded distorted BPM voltage signals due to the impingement of background e+, e- and gamma particles on the BPM striplines. Simulations agreed with the experiment to show that the impact of background pairs at the level expected at the ILC would be negligible. However for CLIC default parameters (centre of mass E=3 TeV, s_x/s_y=53/1nm, e_x/e_y=660/20...
