Conveners
Track 2
- Tracey Berry (University of London (GB))
Track 2
- Eduardo Rodrigues Figueiredo (University of Manchester (GB))
Track 2
- Jonas Rademacker (University of Bristol (GB))
Rebecca Chislett
4/9/13, 8:45 AM
Parallel Track 2
This talk will discuss the search for a boosted hadronically decaying W/Z boson reconstructed in a single jet using the ATLAS experiment at the LHC. The signal is identified using jet shapes calculated from the jet in its centre of mass frame and from this a cross section can be extracted. The peak is then used to investigate the effect of various jet grooming and substructure techniques,...
Rhorry Gauld
(University of Oxford)
4/9/13, 8:57 AM
Parallel Track 2
Top quark production at the LHC is discussed. Studies of theoretical uncertainties in fixed order calculation and in the matching to parton showers will be presented. The focus of the talk will be to summarise the sensitivity of LHCb to measuring single-top and pair-production partial cross sections and their associated production asymmetries.
Sergey Senkin
(University of Bristol (GB))
4/9/13, 9:09 AM
Parallel Track 2
A differential cross section measurement of top quark pair production with respect to missing transverse energy (MET) is presented using 5.1 fb-1 of data collected with the CMS detector at the LHC at a centre of mass energy of 7 TeV. The analysis selects events with a single isolated high energy electron or muon, which is assumed to come from one of the W bosons produced in the decay of a top...
Ben Harry Smart
(University of Edinburgh (GB))
4/9/13, 9:21 AM
Parallel Track 2
A new boson has been observed decaying to two photons and to four leptons. In order to determine whether this new particle is the long sought-after Higgs boson, it should be determined whether it also decays into b quark pairs. An overview of the search with the ATLAS Detector for a Higgs boson decaying into two b quarks, produced in association with a vector boson, will be presented. A look...
Tomas Pilar
(University of Warwick (GB))
4/9/13, 9:33 AM
Parallel Track 2
A model-independent technique can be used to determine the mixing and CP violation parameters in the charm sector using D0->Kshh decays. The Dalitz plot is binned so that no description of the amplitude variation over the phase space is necessary. The analysis is sensitive to the relative sign of the mixing parameters and with additional data will achieve good sensitivity to CP violation...
Edmund Smith
(University of Oxford (GB))
4/9/13, 9:45 AM
Parallel Track 2
The decay B0 -> D K*0 and the charge conjugate mode are studied using 1.0fb-1 of pp collision data collected by the LHCb experiment at sqrt(s) = 7TeV in 2011.
The CP asymmetry between the B0 and B0bar decay rates, is found to be A_d_KK = -0.45 +- 0.23 +- 0.02, where the first uncertainty is statistical and the second is systematic.
The ratio of the B-flavour averaged decay rates in D...
Andrew David Cook
(University of Bristol (GB))
4/9/13, 1:30 PM
Parallel Track 2
The production of Jpsi pairs in proton-proton collisions at a centre of mass energy of 7 TeV has been studied using data collected with the LHCb detector in 2011
Dean Michael Lambert
(University of Edinburgh (GB))
4/9/13, 1:42 PM
Parallel Track 2
B-meson decays involving loop processes allow to search for the indirect effects of new physics beyond the Standard Model. One such channel is the decay B0->phiK*. The worlds largest sample of this decay has been collected by the LHCb experiment. The experimental observables that can be studied in this channel will be discussed together with the experimental challenges. First results based on...
Stewart Martin-Haugh
(University of Sussex (GB))
4/9/13, 1:54 PM
Parallel Track 2
The results of a dedicated search for supersymmetry in events with exactly three leptons and large missing transverse energy at the ATLAS detector are presented. In the absence of any deviation from Standard Model predictions, limits are placed on several supersymmetric scenarios.
Danilo Enoque Ferreira De Lima
(University of Glasgow (GB))
4/9/13, 2:06 PM
Parallel Track 2
Alternatives to the Standard Model predict new particles which decay into top-antitop pairs and which could be detected in ATLAS. A leptophobic Z' and
Kaluza-Klein gluons from Randall-Sundrum models with extra dimensions were used as benchmark models for the analysis with identical generation parameters as in CDF and D0. The semileptonic decay of the top-antitop system is studied in this...
Emyr John Clement
(University of Bristol (GB))
4/9/13, 2:18 PM
Parallel Track 2
A search is performed for a heavy resonance decaying to two long-lived massive neutral particles that each decay to dileptons. The process is detected experimentally via a distinct topological signature consisting of a pair of oppositely charged leptons originating at a vertex significantly displaced from the LHC beam spot. This talk will summarise the results of the search conducted on data...
Callum Lister
(University of Warwick)
4/9/13, 2:30 PM
Parallel Track 2
The muon neutrino beam of the T2K neutrino oscillation experiment contains a small contamination from anti-neutrinos. It is important to measure accurately this flux component since it: (a) forms a background to the oscillation measurements and; (b) gives the opportunity to study the poorly known anti-neutrino cross-section on carbon at neutrino energies of ~1GeV. This talk will outline a...
104.
Leptonic topologies for the study of neutral current single pi0 events in the T2K near detector
Mr
Zachary Williamson
(T2K Oxford)
4/9/13, 2:42 PM
Parallel Track 2
This presentation outlines additional efforts to use the near detector to measure the cross section for single pi0 production. Such processes are relatively rare in the tracker region and this work will consider additional, less restrictive topologies to increase statistics. Specifically, this work will focus on single pion neutral current interactions where one or both of the decay gammas...
Lee Tomlinson
(University of Manchester (GB))
4/9/13, 2:54 PM
Parallel Track 2
The presence of large logarithms in QCD corrections to observables spoils the validity of a calculation truncated at finite order and calls for an all-orders approach. The QT (transverse momentum) spectrum of massive lepton pairs, produced in hadron colliders by the Drell-Yan mechanism, has received a great deal of attention in electroweak phenomenology. We present and discuss a...
Dr
Stefan Ohm
(University of Leicester, Leicester, UK)
4/9/13, 3:06 PM
Parallel Track 2
HESS J1640-465 is one of the most extreme Galactic TeV gamma-ray sources that has been discovered with the High Energy Stereoscopic System (H.E.S.S.). The emission is likely associated to the shell-type supernova remnant (SNR) G338.3-0.0 with an estimated distance of ~10 kpc, making HESS J1640-465 the most luminous Galactic source in the TeV regime. Recent multi-wavelength observations led to...
Ms
Nicola McConkey
(University of Warwick)
4/10/13, 8:45 AM
Parallel Track 2
Results are presented from a small-scale experiment to investigate the use of room temperature organic liquid scintillators as the active medium for a time projection chamber (TPC).
The optical properties of liquid scintillators have long been known, but their ability to transport charge has remained, until now, largely untested. The idea of using room temperature liquids as an active...
Dr
Matti Kalliokoski
(Lancaster University)
4/10/13, 8:57 AM
Parallel Track 2
String-theory based extensions of the Standard Model (SM) introduce a set of new particles and fields. The only renormalizable interaction with the visible SM can occur via kinetic mixing of SM photon with the hidden sector photon (HSP).
These photon oscillations can be studied with “light shining through wall” type of experiments. One of these experiments is being built by the CASCADE...
Matthew Lawe
(University of Sheffield)
4/10/13, 9:09 AM
Parallel Track 2
The cross-section uncertainty for neutrino interactions with associated pi0-meson production is an important systematic uncertainty in the measurement of electron-neutrino appearance within the Super-Kamiokande (far) detector of the T2K experiment. The pi0 analysis group of ND280 (near) detector are developing multiple parallel analyses with the aim of producing several pi0, inclusive and...
Lee Tomlinson
(University of Manchester (GB))
4/10/13, 9:21 AM
Parallel Track 2
The calibration of the absolute luminosity scale at ATLAS is performed by dedicated van der Meer (vdM) scans. The current process assumes the factorisation of the luminosity distribution in the horizontal and vertical directions (x and y, respectively). I study a model in which the individual beam densities are parameterised as single-Gaussians. The model includes the possibility of having a...
Henry Brown
(University of Liverpool (GB))
4/10/13, 9:33 AM
Parallel Track 2
Searches are on-going at LHCb top explore the top quark sector, which has yet to be measured at high eta at LHCb, providing a theoretical overview, and discussion of a dilepton+b jet analysis.
