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ATLAS


ATLAS

The ATLAS experiment is one of the general purpose detectors installed at the Large Hadron Collider (LHC). ATLAS is a collaboration of 182 institutes from 38 different countries. The ATLAS group at the University of Warwick has been a member since February 2012.

The Large Hadron Collider, located on the Swiss-French border, is the highest energy particle collider ever constructed. Currently operating with beams of protons at an energy of 6.5 TeV brought into collision at four points on the ring, which has a circumference of 27km. At one of these collision points the ATLAS experiment operates, collecting as much information as possible about the interactions.

The 2012 observation of a new particle in the search for the Higgs Boson created much excitement. ATLAS was one of two experiments involved in the search for this much sought after particle at the LHC and published a paper on the observation of a new particle. One of the important tasks now is measuring the properties of this new object.

The LHC Run 2, from 2015 to 2018, with collisions at 13 TeV, has already delivered more than three times the data of Run 1. This heralds the collection of large datasets at the energy frontier which will reveal the detailed properties of the Higgs boson and will enable the search for New Physics.


People

Academics

Dr Sinead Farrington (Group leader - enquiries for fellowship or studentship enquiries welcome)

Prof. Paul Harrison

Prof. Bill Murray


Research Fellows

Dr Tim Martin

Ligang Xia

Hardware Staff

Mr Keith Jewkes

Dr Ankush Mitra

Dr Martin Spangenberg

PhD Students

Mr Adomas Jelinskas

Mr Chris McNicol

Mr Vangelis Vladimirov

Prospective Students

Specific student PhD proposals include Higgs to tau decay and boosted Higgs production

Research Interests

The Warwick ATLAS group is involved in a number of research activities including the study of Higgs Bosons decaying to a pair of tau leptons. In 2014 the Warwick group played a major part in the discovery of this decay mode for the SM Higgs and followed this up with an important role in studying the CP properties in the Higgs to tau tau decay. We are active in searches for additional Higgs bosons from scenarios with decays to muon or tau pairs, and the study of high momentum Higgs bosons with decay to b pairs. Other research directions include the precise measurements of known processes, such as the fragmentation that creates jets from quarks, and measuring the CKM matrix element V(cb) in top quark decay.

In addition to these activities the Warwick group are also involved in a variety of detector performance tasks related to the trigger. The trigger, which consists of both hardware and software elements, is the part of ATLAS which decides if an event observed by the detector is kept for further processing. This is necessary given that in the duration of one second there are hundreds of millions of collisions out of which only a few hundred may be stored. Our involvement consists of general trigger configuration and development of new algorithms to handle the challenging and evolving environment of the typical collision.

The ATLAS detector will be upgraded with a new silicon detector and updated trigger system. We are responsible for the Quality Control of the silicon strip detector modules and for parts of the trigger core software restructuring and cost monitoring.