Experimental High Energy Particle Physics Research at UCL
Lead Research Organisation:
University College London
Department Name: Physics and Astronomy
Abstract
Experimental particle physics is about looking at extremely small sizes, or equivalently extremely high energies. It teaches us about the underlying nature of the physical universe, and the forces and laws that govern its development, from the first moments of the big bang, through to the present day, and far into the future. Particle physics has led to many revolutionary ideas, which have had a profound impact upon the way we think about ourselves and the world. One reason for the power of these ideas is that they are grounded in and tested by actual scientific observations of the world around us - that is, experiment. Without experiment, science is dead. Experiments capable of reaching these extremes of energy and size are very technically challenging. The challenges include devising precision detectors which can operate in hostile environments, particle accelerators which can achieve high energy collisions, super-sensitive detectors capable of identifying very rare decays with very small 'background noise', high-speed electronics which can read out millions of pieces of information per second, and robust, flexible software which can analyse the data in a distributed computing system all over the world. Thus another consequence of an active particle physics activity is a stimulation of technological developments and the training of people skilled in the development and use of high technology. This is a 'rolling grant', which means that it covers a broad variety of particle physics experiments. The rolling grant underpins the base of highly skilled research and technical staff which makes UCL able to be a leader in experimental physics at the very highest levels. It provides a measure of career security, as well as travel and equipment money. This also allows the group to function effectively in the training of PhD students, and we are in fact bidding to fund several PhD students on this grant. The science this grant will support includes: - Analysis of electron-proton collisions using the ZEUS detector at the HERA collider in Hamburg, which is telling us more and more about the internal structure of the proton and the photon, and about the strong nuclear force which holds the proton together. - Analysis of proton-antiproton collisions with the CDF detector at the Tevatron collider in Chicago, where precision measurements of the W boson (which carries the weak nuclear force), studies of the super-heavy top quark, and a search for the Higgs boson are underway. - Analysis of neutrino oscillations from the MINOS experiment in Chicago. The mysterious neutrino was once thought to be massless but is now known to have mass - MINOS will make the most precise measurement of the mixing between the different 'flavours' of neutrino. - Commisioning of the ATLAS detector at CERN, and analysis of the first date from the LHC. The LHC is the first collider to operate above the 'energy horizon' above which the weak and electromagentic forces are unified. As well as the Higgs, the LHC may find supersymmetry, extra spatial dimensions, or other exotica we have not even imagined. - Analysis of data from the NEMO-III experiment, a super-sensitive detector under a mountain in France searching for 'neutrinoless double beta decay'. If found, this rare process would not only provide the best measurement by far of the neutrino's mass, but would also prove that unlike all other particles, the neutrino is its own antiparticle. If true, this would give a big clue to physics at the 'grand unification' scale, where all forces are (perhaps!) unified. We also have other neutrino projects, work on the proposed international linear collider, and some theoretical activities, all largely funded on other grants. These projects benefit greatly from being co-sited with the rolling grant. All these projects contribute to the intellectually exciting environment that is UCL high energy physics.
Publications
Aaltonen T
(2008)
First run II measurement of the W boson mass at the Fermilab Tevatron
in Physical Review D
Aaltonen T
(2009)
Search for standard model Higgs boson production in association with a W boson using a neural network discriminant at CDF
in Physical Review D
Aaltonen T
(2007)
Limits on anomalous triple gauge couplings in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Aaltonen T
(2007)
Observation of the Heavy Baryons Sigma b and Sigma b*.
in Physical review letters
Aaltonen T
(2008)
Measurement of the inclusive jet cross section at the Fermilab Tevatron p p ¯ collider using a cone-based jet algorithm
in Physical Review D
Aaltonen T
(2009)
Measurement of cross sections for b jet production in events with a Z boson in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Aaltonen T
(2009)
Search for high-mass resonances decaying to dimuons at CDF.
in Physical review letters
Aaltonen T
(2009)
Top quark mass measurement in the t t ¯ all hadronic channel using a matrix element technique in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Aaltonen T
(2009)
Measurement of W-boson helicity fractions in top-quark decays using cos ? *
in Physics Letters B
Aaltonen T
(2009)
Search for the associated production of the standard-model Higgs Boson in the all-hadronic channel.
in Physical review letters
Aaltonen T
(2009)
Measurement of particle production and inclusive differential cross sections in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Aaltonen T
(2008)
Direct Measurement of the W Boson Width in p p ¯ Collisions at s = 1.96 TeV
in Physical Review Letters
Aaltonen T
(2008)
Evidence for D 0 - D ¯ 0 Mixing Using the CDF II Detector
in Physical Review Letters
Aaltonen T
(2008)
Cross-section-constrained top-quark mass measurement from dilepton events at the Tevatron.
in Physical review letters
Aaltonen T
(2008)
Forward-Backward Asymmetry in Top-Quark Production in p p ¯ Collisions at s = 1.96 TeV
in Physical Review Letters
Aaltonen T
(2009)
Search for the production of narrow tb[over] resonances in 1.9 fb;{-1} of pp[over] collisions at sqrt[s] = 1.96 TeV.
in Physical review letters
Aaltonen T
(2008)
Search for standard model Higgs bosons produced in association with W bosons.
in Physical review letters
Aaltonen T
(2009)
Measurement of the t t ¯ cross section in p p ¯ collisions at s = 1.96 TeV using dilepton events with a lepton plus track selection
in Physical Review D
Aaltonen T
(2008)
Measurement of the cross section for W -boson production in association with jets in p p ¯ collisions at s = 1.96 TeV
in Physical Review D
Aaltonen T
(2009)
Search for the decays B_{(s)};{0} --> e;{+} micro;{-} and B_{(s)};{0} --> e;{+} e;{-} in CDF run II.
in Physical review letters
Aaltonen T
(2009)
Search for the rare decays B + ? µ + µ - K + , B 0 ? µ + µ - K * ( 892 ) 0 , and B s 0 ? µ + µ - ? at CDF
in Physical Review D
Aaltonen T
(2009)
First observation of vector boson pairs in a hadronic final state at the tevatron collider.
in Physical review letters
Aaltonen T
(2008)
Observation of exclusive dijet production at the Fermilab Tevatron p ¯ p collider
in Physical Review D
Aaltonen T
(2009)
Precision measurement of the X(3872) mass in J/psi pi(+) pi(-) decays.
in Physical review letters
Aaltonen T
(2009)
Measurement of the top-quark mass with dilepton events selected using neuroevolution at CDF.
in Physical review letters
Description | CERN/ATLANTIS |
Amount | £24,945 (GBP) |
Organisation | European Organization for Nuclear Research (CERN) |
Department | ATLAS Collaboration |
Sector | Academic/University |
Country | Switzerland |
Start | 04/2007 |
End | 11/2007 |
Description | CERN/MCNet |
Amount | £271,986 (GBP) |
Organisation | European Organization for Nuclear Research (CERN) |
Sector | Academic/University |
Country | Switzerland |
Start | 01/2007 |
End | 12/2010 |
Description | CERN/RTT |
Amount | £45,000 (GBP) |
Organisation | European Organization for Nuclear Research (CERN) |
Department | ATLAS Collaboration |
Sector | Academic/University |
Country | Switzerland |
Start | 03/2007 |
End | 03/2008 |
Description | DESY/Guest Scientist |
Amount | £34,930 (GBP) |
Organisation | Deutsches Electronen-Synchrotron (DESY) |
Sector | Academic/University |
Country | Germany |
Start | 06/2007 |
End | 06/2009 |
Description | DESY/ZEUS Studentship |
Amount | £41,000 (GBP) |
Organisation | Deutsches Electronen-Synchrotron (DESY) |
Sector | Academic/University |
Country | Germany |
Start | 09/2005 |
End | 09/2008 |
Description | DSTL/ACORNE Studentship |
Amount | £12,930 (GBP) |
Organisation | Defence Science & Technology Laboratory (DSTL) |
Sector | Public |
Country | United Kingdom |
Start | 09/2006 |
End | 03/2009 |
Description | EPSRC/ESLEA |
Amount | £134,810 (GBP) |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 02/2005 |
End | 01/2007 |
Description | EU/ARTEMIS |
Amount | £228,960 (GBP) |
Funding ID | 42051 |
Organisation | Spanish National Research Council (CSIC) |
Sector | Public |
Country | Spain |
Start | 09/2006 |
End | 09/2010 |
Description | EU/EUDET |
Amount | £194,229 (GBP) |
Funding ID | 26126 |
Organisation | Spanish National Research Council (CSIC) |
Sector | Public |
Country | Spain |
Start | 01/2006 |
End | 12/2009 |
Description | Humboldt/Research Fellowship |
Amount | £19,687 (GBP) |
Organisation | Alexander von Humboldt Foundation |
Sector | Public |
Country | Germany |
Start | 02/2008 |
End | 01/2009 |
Description | Nuffield/Precise determination of beam energies at an ILC |
Amount | £5,000 (GBP) |
Organisation | Nuffield Foundation |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 04/2005 |
End | 04/2007 |
Description | RS URF/Higgs Physics at ATLAS |
Amount | £244,218 (GBP) |
Organisation | The Royal Society |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 09/2008 |
End | 09/2013 |
Description | RS URF/QCD Phenomenology |
Amount | £30,171 (GBP) |
Organisation | The Royal Society |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 03/2006 |
End | 05/2008 |
Description | RS/UHE Neutrinos |
Amount | £121,500 (GBP) |
Organisation | The Royal Society |
Sector | Charity/Non Profit |
Country | United Kingdom |
Start | 05/2007 |
End | 05/2009 |
Description | ARTEMIS |
Organisation | Spanish National Research Council (CSIC) |
Country | Spain |
Sector | Public |
PI Contribution | Training |
Collaborator Contribution | Training |
Impact | PhDs |
Start Year | 2006 |
Title | Scintillators |
Description | High resolution scintillators developed with ELJEN for SuperNEMO Scintillators |
Type Of Technology | Detection Devices |
Year Produced | 2008 |
Impact | Has potential application in precise energy measurement for proton cancer therapy. |
Description | Articles in National Press |
Form Of Engagement Activity | A magazine, newsletter or online publication |
Part Of Official Scheme? | No |
Geographic Reach | National |
Primary Audience | Public/other audiences |
Results and Impact | Again too numerous too itemize: articles/quotes etc for Times, Guardian, Telegraph, Independent, Scotsman, Evening Standard, THES etc . |
Year(s) Of Engagement Activity | 2008,2009,2010,2011,2012,2013 |
Description | IoP Physics in Perspective |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Type Of Presentation | Keynote/Invited Speaker |
Geographic Reach | National |
Primary Audience | Schools |
Results and Impact | Three talks each with other 250 school students . |
Year(s) Of Engagement Activity | 2007,2009,2011 |
Description | Podcasts |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Type Of Presentation | Keynote/Invited Speaker |
Geographic Reach | International |
Primary Audience | Public/other audiences |
Results and Impact | Again several of these for several organisations. . |
Year(s) Of Engagement Activity | 2009,2010,2011,2012,2013 |
Description | SET Parliament Session |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Type Of Presentation | Poster Presentation |
Geographic Reach | National |
Primary Audience | Policymakers/politicians |
Results and Impact | MPs attended . |
Year(s) Of Engagement Activity | 2006 |
Description | School Visits / Schoolchildren mentoring |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Type Of Presentation | Keynote/Invited Speaker |
Geographic Reach | Local |
Primary Audience | Schools |
Results and Impact | These ate too numerous to create individual entries for. Our activities have ranged from talks in lessons, assemblies, career days, lab sessions. . |
Year(s) Of Engagement Activity | Pre-2006,2006,2007,2008,2009,2010,2011,2012,2013 |
Description | Short Films: Colliding Particles |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | Yes |
Geographic Reach | International |
Primary Audience | Public/other audiences |
Results and Impact | Series of short films about the background to Higgs discovery Online films |
Year(s) Of Engagement Activity | 2008,2009,2010,2011,2012 |
Description | TV/Radio appearances |
Form Of Engagement Activity | A press release, press conference or response to a media enquiry/interview |
Part Of Official Scheme? | No |
Type Of Presentation | Keynote/Invited Speaker |
Geographic Reach | International |
Primary Audience | Media (as a channel to the public) |
Results and Impact | Too numerous to list individually but we have made appearances on BBC1,BBC2, ITV, C4, Al Jazeera, Sky News, GMTV, News-24, Classic FM, Capital Radio, BBC R4. . |
Year(s) Of Engagement Activity | 2007,2008,2009,2010,2011,2012,2013 |