CONTENTS Group Membership, January 2002 2
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CONTENTS Group Membership, January 2002 2 APPENDIX 1: Report on Activities 2000-2002 & Proposed Programme 2002-2006 4 1OPAL 4 2H1 7 3 ATLAS 11 4 BABAR 19 5DØ 24 6 e-Science 29 7 Geant4 32 8 Blue Sky and applied R&D 33 9 Computing 36 10 Activities in Support of Public Understanding of Science 38 11 Collaborations and contacts with Industry 41 12 Other Research Related Activities by Group Members 41 13 Staff Management and Implementation of Concordat 41 APPENDIX 2: Request for Funds 1. Support staff 43 2. Travel 55 3. Consumables 56 4. Equipment 58 APPENDIX 3: Publications 61 1 Group Membership, May 2002 Academic Staff Dr John Allison Senior Lecturer Professor Roger Barlow Professor Dr Ian Duerdoth Senior Lecturer Dr Mike Ibbotson Reader Dr George Lafferty Reader Dr Fred Loebinger Senior Lecturer Professor Robin Marshall Professor, Group Leader Dr Terry Wyatt Reader Dr A N Other (from Sept 2002) Lecturer Fellows Dr Brian Cox PPARC Advanced Fellow Dr Graham Wilson (leave of absence for 2 yrs) PPARC Advanced Fellow James Weatherall PPARC Fellow PPARC funded Research Associates∗ Dr Nick Malden Dr Joleen Pater Dr Michiel Sanders Dr Ben Waugh Dr Jenny Williams PPARC funded Responsive Research Associate Dr Liang Han PPARC funded e-Science Research Associates Steve Dallison core e-Science Sergey Dolgobrodov core e-Science Gareth Fairey EU/PPARC DataGrid Alessandra Forti GridPP Andrew McNab EU/PPARC DataGrid PPARC funded Support Staff∗ Phil Dunn (replacement) Technician Andrew Elvin Technician Dr Joe Foster Physicist Programmer Julian Freestone Applied Physicist Dr Scott Kolya Physicist Programmer Dr Richard E Hughes-Jones Applied Physicist Dave Mercer Applied Physicist Mike Needham Technician Sabah Salih Computer Manager/Grid Dr Steve Snow Research Fellow Keith Stephens Applied Physicist Ray Thompson Applied Physicist Stuart Wild Technician Other Group Staff Florene Daniels Secretary Categories marked ∗ are funded from the Rolling Grant 2 Research Students Gavin Hesketh PPARC 3rd year Frank Jackson PPARC 3rd year David South PPARC 3rd year Matthew Beckingham PPARC 2nd year Adriana Bungau 2nd year Cristian Bungau 2nd year Simon Dean PPARC 2nd year Andrew Lyon PPARC 2nd year Farahnaaz Nauyock 2nd year Tamsin Edwards PPARC 1st year Mark Hodgkinson PPARC 1st year Mudhahir Ismail 1st year Sophie Mallows 1st year Emily Nurse PPARC 1st year Andres Osorio 1st year Marta Tavera 1st year Vivian Voniatou 1st year 3 Appendix 1: REPORT ON ACTIVITIES 2000-2002 1. OPAL 1.1 Report on Activities for 2000-2002 The OPAL detector ceased operation with the close of LEP in 2000. The Barrel muon chambers, built by Manchester, maintained their reliability and efficiency right to the end, under the care of Jo Pater. 1.1.1 Acoplanar leptons Graham Wilson, TerryWyatt and Tom Marchant have continued their definitive study search- ing for SUSY signatures using acoplanar lepton pairs, which is the classic signature for slepton pair production and for charginos. Techniques evolved have produced the most sensitive limits in several channels. These results have been presented at conferences and will appear in a forthcoming journal publication Figure 1.1 Exclusion contours for chargino pair production. For example, Figure 1.1 shows contours of the 95% CL upper limits of the chargino pair cross section times the 2-body (lepton sneutrino) branching ratio at a cms energy of 208 GeV,assuming a β/s dependence in the cross section. These results have also contributed (with other channels) to limits on Gauge Mediated SUSY breaking and the production of charged Higgs particles and long-lived sleptons The event selections are also used to define the OPAL sample of leptonic W+W− events, which are used in OPAL’s measurements of the production and properties of W bosons at LEP. 4 1.1.2 Acoplanar leptons and photons Graham Wilson has performed searches for events containing photons and missing transverse χ 0 → χ 0γ momentum. Such events are a signature for SUSY decays such as 2 1 . Again, these results are the definitive ones reported by the OPAL collaboration. 1.1.3 Muon pairs The definitive OPAL ‘Zedometry’ paper on the properties of the Z boson was published. Many Manchester physicists past and present contributed to this analysis through the muon pair cross section and asymmetry studies. Roger Barlow and Vato Kartvelishvili also produced a new analysis of the muon pair asym- metry around the Z peak. This uses the small acolinearity and acoplanarity angles produced by radiative processes, on an event by event basis, to probe the asymmetry as a function of the effective centre of mass energy and this provides a separate measurement of the axial coupling constant of the Z. Figure 1.2 Forward-backward muon asymmetry as a function of centre of mass energy. 1.1.4 W decays Vato Kartvelishvili produced an event weighting scheme that simulates the effect of Bose- Einstein correlations. This was used to estimate the size of the systematic effect on W mass measurements from the fully hadron decays, not only by OPALbut by the other LEP experiments. Vato and Steve Dallison, Fred Loebinger’s student, have been studying the strange quark content in W pair decays to obtain a measurement of the Vcs CKM matrix element. 1.1.4 Hadrons George Lafferty has continued to study hadrons produced from decays of the Z at LEP 1, contributing to analyses of KK Bose-Einstein correlations and measurements of vector-meson spin alignment. He is currently measuring resonance-particle correlations. 5 1.1.5 Other OPAL activities Graham Wilson was also the trigger co-ordinator for the OPAL experiment during this period, a task of such importance that CERN contributed to his LTA costs. George Lafferty was the convenor of OPAL soft QCD physics working group until early 2001. He was then appointed senior physics co-ordinator for 2001/2, and successfully ensured that the analysis continued to completion even though the experiment was no longer running. 1.2 Proposed Programme for 2002 onwards With the return of George Lafferty form CERN in June 2002, the final phase of Manchester’s involvement in OPAL will begin. He will continue on Opal at 10% till the September 2003 after which Manchester’s OPAL effort will cease. 6 2. H1 2.1 Report on Activities for 2000-2002 Staff Profile integrated 2002-2006 Staff member Position f.t.e%/max % M Ibbotson Academic 20/50 R Marshall Academic 20/50 B E Cox Fellow 10/100 N Malden RA 90/100 S D Kolya Phys/Progr 10/100 D Mercer Appl Phys 10/100 K Stephens Appl Phys 10/30 2.1.1 The Forward Muon Detector The increased beam currents achieved by HERA towards the end of pre-upgrade running, produced a new environment for the Forward Muon detector (FMD) during injection, requiring even more stringent monitoring and control of standby voltages in order to protect the chambers. Fortunately the detector continued to function well during actual luminosity running. To make life easier for on-call experts, several software tools were developed by Ben Waugh to enable the FMD to be monitored remotely via a WWW browser. The period since the end of the last pre-upgrade luminosity run at HERA (August 2000) has been used by HERA to increase the luminosity of the collider. H1 has also used this shut-down to upgrade the detector and to make adaptations to the post-upgrade conditions. The positioners (‘end stops’) around the beam pipe and HERA magnets have been redesigned and adapted by Ben Waugh, Keith Stephens and Nick Malden to cope with the larger magnets required by the HERA luminosity upgrade. Ben Waugh and Nick Malden have incorporated the FMD into the new unified Detector Control and Monitoring system along with the other H1 tracking detectors and some of the calorimeters. This system is currently undergoing final testing in preparation for the imminent start of post-upgrade luminosity. It will make operation of H1 by shift crews simpler and will eventually enable the running of the detector to be more automated, responding according to pre-programmed instructions to background conditions, trips etc. A noteable physics contribution from the FMD is the production of J/ψ mesons at low Wγ p in photoproduction. These results were published in early 2000 (see ref[1], this section). 2.1.2 Physics Analysis An H1 paper (ref[2] this section) has been published, based on the analysis by Brian Cox and Angela Wyatt, and edited by them. It is a study of diffractive events in which a pair of jets is separated by a rapidity gap with a large transverse-momentum transfer. (See Figure 2.1). Ben Waugh is working on an extension of this analysis to the more inclusive process of diffractive double dissociation in which the final state hadrons need not form jets and the proton dissociative system may not be fully contained in the detector. In the same area, Robin Marshall has been developing analysis techniques to improve the quality of information about diffraction. Due to technical reasons involving the resolution on t when t becomes small, it has been necessary to make strong cuts in the data on jets with rapidity gaps, effectively eliminating the region where the models can be most effectively tested. Small t here means at the low end of the HERA range. Robin’s contribution is to develop a kinematic fitting programme to fully 7 exploit all the measured information in an event, including the incomplete proton disintegration debris for which he has devised the unbiased procedure outlined above. This should increase the t range of the measurement considerably. When the fitting procedure is refined, it can be extended to other processes and possibly to understand how to handle jets in general in a kinematic fit where there are large colour forces between jets and large relativistic boosts.