Particle Physics Experiment

Particle Physics Experiment

• 9 Academics + 1 retired + 1 visiting Professor– Includes Doyle (80% GridPP/Senior Fellow), Parkes (PPARC PD Fellow),

Rahman (50% Solid State), Soler (joint appointment with CCLRC)

• 20 Research Staff– 15 PPARC (inc 4 grid) + 5 (Scottish Enterprise, EPSRC, SHEFC/JREI, EU)

• 17 Ph D students– 6 PPARC quota + 4 PPARC Case/E-science + 3 University + 4 other PPARC CASE bidding is wonderful opportunity. Keep it!

• 6 Support:– 5 PPARC Technicians, 0.5 University Secretaries, 0.5 PPARC Secretary

(GridPP)

• Long-term programme– Core is the academics plus long-term PPARC RAs

• Hardware (RA3 + 2 RA2s) Software (3 RA2s)

Particle Physics Experiment

• Experiments producing physics results (run until 2006)– ZEUS, CDF

• Preparations for the LHC (run from 2007)– ATLAS, LHCb

• e-science: the Grid– ScotGRID, CDF grid, ATLAS, LHCb

• Detector development– Radiation hard detectors for PP; spin-out applications

• Long term future– HARP, MARS, linear collider

• Finishing: ALEPH, DELPHI, NOMAD

PPE: new funding and support (Jan 2000/Dec 2001)

• University– Facilities (clean room, computer room, 10 new offices, more

lab space): value added to PPE research £492K– Operating budget (2 years) £90K

• PPARC– Rolling grant (4 year spend limit quoted) £2728K– 16 other awards

£1396K– plus share in value of CDF-JIF

• Other funders– 19 awards £1450K

• Total (9 P.I.’s) £6156K

• excluded: RAL line, quota students, University PGs, staff salaries, existing buildings, CERN sub

ZEUS: our main science engine

• FTEs (1.4 acad [4 people], 2 RA, 3 PG). Glasgow physics:– Prompt in photoproduction. 1st measurements at HERA. led by us– Prompt + jets in photoproduction intrinsic kT. All Glasgow– Angular and current-target correlations in DIS– Azimuthal asymmetries– Dijet cross sections using real and virtual (unique Q2 region)– High dijet masses in photoproduction structure

• Analyses in progress– Single top production– + jet in DIS– Virtual photon structure via dijet production– Scaling violations in p interactions– DIS event shapes s

– Jet substructure s

– Charged current events at high ET W-mass and QCD tests

• Papers on MLLA phenomenology (2 with Bristol) + review

ZEUS results

p + jetstudy pT balance:

Quark intrinsic kT in proton

QCD event shape study:s and 0 (non-perturb.)

ZEUS: upgrade (2002-6)

• Benefits: – More Lumi, heavy flavours, tracking acceptance, polarisation

• Glasgow aims:– prompt photon studies. Need higher statistics:

• to probe QCD effects.

• to study diffractive events– Prompt photons with charm - using Microvertex detector– Jets and event shape studies:

• higher Q2 to compare to MLLA,

• charm azimuthal asymmetries in boson-gluon fusion using charm tag

• jet cross sections to higher Q2 and ET– More sensitivity in top search (FCNC limits, already much

better than LEP, TeVatron)

• Work on background reduction

CDF: our new science engine

• FTEs (1.2 acad [2 people], 1.6 RA, 5 PG)– [PG funding from Fermilab and Argonne]

• Hardware and analysis tools:– Big involvement in SVX development, testing, calibration– We lead data-bases (calibrations etc), CDF Grid activity – Accelerator development (antiproton collection, backgrounds

{PG student}, technicians)– CDF-JIF analysis server in Glasgow

• Physics has started:– search for Bs J/– paper on double diffraction dissociation

• Main thrust: physics of b-quarks.

CDF: b-physics

• Production mechanisms poorly understood– need to establish QCD mechanisms– pre-requisite for Higgs search– needed for accurate CKM measurements (sin 2 +..)

• Build on J/ study and b-jet tagging (ex-ALEPH):– Bs lifetime using Bs J/– Bd mixing– b lifetime– Bs lifetime using semileptonic decays

• Bid for new RA– use b-tagging to study top physics

CDF Hardware and analysis

Vertex detector

Run 1:B+ J/K+

Run 2: J/ decay length

ATLAS: our main future

• FTEs: 2.3 academics [6 people], 4 RA, 1 PG– Smith is chairman of ATLAS collaboration board

• Forward Semiconductor Tracker (SCT)– Commission test system for modules– Systems test lab at CERN– Prototype thermal shield– Disk mock up. Services– Module irradiations and subsequent tests– ‘3D’ technology - continues as R&D project

• Preparations for physics– WH signal/background studies– Interface to EU data-grid management

ATLAS- Forward semiconductor tracker tests

Laser-scanning tests in Glasgow (above)

Forward SCT module (2 layers) showing services (left)

System test at CERN

ATLAS: low-mass Higgs via WH, H b,bbar

Kinematic cuts to suppress WZ & continuum backgroundwith high efficiency for WH.

ATLAS plans

• Forward SCT modules– 300 modules to be bonded, tested QA’d in Glasgow– Services layout work– Irradiation and tests– System test facility at CERN– Assembly, testing, commissioning, integration (part of UK

team)

• Physics preparations– Interface to grid– Data challenges. Use of ScotGRID facility

LHCb: our new future

• FTEs building up:– 2 new academics (Soler, Parkes), 1 RA, 1 PG rising to 2

• LHCb RICH project (Ring Imaging CHerenkov)– Photon detector technology pixel HPD as baseline– ASIC design for ALICE/LHCb (with CERN)– RICH2 Mechanical design and assembly project (CCLRC

based)– Development lab in Glasgow

• LHCb VELO project (VErtex LOcator)– n-in-n technology EU funded development– Irradiated detector tests to very high fluences

LHCb - RICH and VELO

Single photoelectronspectra visible

R and layers

Flux > 3.1014 n cm-2

LHCb: plans

• RICH– Full scale test facility in Glasgow (250 HPDs = 250k pixels)– Laser alignment– Gas monitoring– Simulation– Mechanics

• VELO (following Parkes’s transfer from Liverpool)– Software coordination, algorithms– Sensor R&D– Test beam analysis, irradiations

• ScotGRID– Monte Carlo Facility and studies (experience on MAPs)

• Bid for RA: Parkes’s transfer brings responsibilities

Developments for future detectors and facilities

• Detector development + involvement in future linear collider (ECFA study, MAPS) & HARP

• 4 academics, 6 RA, 5 PG. Lots of external funding• Radiation-hard detectors:

– Lazarus effect – 3D-technology - €2.2M project– Charge carrier transport studies (builds on IMPACT project)– GaAs/AlGaAs detectors needing no bias– SiC as detector material– Pixel detector testing (with RAL, LAD1 and Dash-E projects)– MEDIPIX2 collaboration - bump bonding– Test our prototype ion-beam profiler– Electrode arrays for retinal imaging

3D radiation-hard detectors for PPE

Photoelectro-chemical etching

Dry Etching Laser Drilling

•Contacts:•Schottky-Schottky•n-Schottky•p-n junction

Collection: distance /10, time /10, volts /100

Si & GaAs & X-rays

New detector materials for high radiation environments

particle pulse height spectra from pad diodes as bias voltage is varied

GaN SiC

Detector R&D plans

• CERN R&D collaborations– RD39,48, INTAS (Glasgow coordinates): ongoing development

• EU-projects– 3D RID (Glasgow coordinates)

• Closely-spaced matrix of electrodes through the material– CANDID

• Pixel detector for angiography

• Technology transfer– MEDIPIX2 Philips (Director for strategy is Honorary Professor here)

• New materials– SiC, GaN (wide gap)

• Retinal imaging microarrays (with SCPP Santa Cruz + others)

• Ion beam profiler (Scottish Enterprise)

Future accelerators

• e+e- linear collider:– MAPS (Monolithic Active Pixel Sensors) (PPARC grant)

• approved R&D project at DESY. Intelligent alternative to CCDs

• partners in PRIMA bid (Basic Technology - resurrect??)– Fermilab accelerator know-how (MARS) machine/detector

interface

• Neutrino Factory– HARP (study muon neutrino source)

• NOMAD know-how

• alignment and tracking (like LHCb methods)

• Compare to MARS simulations