Dr
Emily Nurse
(University College London)
4/7/14, 1:35 PM
The Energy Frontier Programme
A review of recent Standard Model results from the ATLAS and CMS experiments utilising data from Run I of the LHC is given.
Results on jets, bosons plus jets, dibosons and top quark physics are discussed as well as observations of rare Standard Model processes.
Dr
Henning Flaecher
(University of Bristol)
4/7/14, 2:10 PM
The Energy Frontier Programme
The search for physics beyond the Standard Model is a priority in the physics programme of the ATLAS and CMS collaborations. These searches cover a wide variety of experimental signatures and proposed models, ranging from, e.g., supersymmetry to heavy gauge bosons, extra dimensions and dark matter. In this talk the latest results obtained with up to 20/fb of data collected at 8 TeV...
Prof.
William Murray
(STFC/Warwick)
4/7/14, 2:45 PM
The Energy Frontier Programme
The LHC Higgs programme has been spectacularly successful in discovering what has been variously called 'A new boson', 'a Higgs-like boson' and 'a Higgs boson' even while the machine was running well below design energy. But what do we really know about this particle? Why don't we just call it 'The Higgs boson', and will we ever do so? And what can it tell us about the remaining mysteries such...
Dr
Chris Quigg
(Fermi National Accelerator Lab. (US))
4/7/14, 3:20 PM
The Energy Frontier Programme
I will summarize the theoretical context for the search for the avatar of electroweak symmetry breaking, review what we have learned about H(125), and outline what we need to learn about the new particle. I will describe some of the questions raised and opportunities opened by the discovery of H(125), and how they influence our thinking about future accelerators. Finally, I will try to connect...
Dr
Anthony Challinor
4/7/14, 4:15 PM
Particle Astrophysics, Current and Future
I review the main cosmology results from the 2013 Planck release. I will also discuss some developments since the original submission of the papers, and put the Planck results in the context of more recent results from the BICEP2 experiment.
Prof.
Paula Chadwick
4/7/14, 4:45 PM
Particle Astrophysics, Current and Future
Gamma-rays provide a unique probe of the non-thermal universe, allowing us to investigate a wide range of astroparticle physics and astronomy. At present, instruments such as the space-borne Fermi telescope and the ground-based HESS, MAGIC and VERITAS telescopes are providing us with a wealth of results, covering active galactic nuclei, supernova remnants, pulsars, gamma-ray bursts and many...
Dr
James Nikkel
4/7/14, 5:15 PM
Particle Astrophysics, Current and Future
Physicists are still looking for what makes up most of our galaxy, and while there may be some hints, dark matter still has not been conclusively observed in the lab. I will present the current status of direct dark matter detection and the direction in which this research is headed.
Prof.
Katherine Freese
4/7/14, 5:40 PM
Particle Astrophysics, Current and Future
Cosmology has just had a major discovery: gravity waves from the early Universe. The Cosmic Microwave Background polarization experiment BICEP2 has announced detection of B-modes, which can be explained as the gravitational wave signature of inflation. I will discuss the significance of these ground-breaking results for cosmology. This discovery, if confirmed in future data sets, is a...
Prof.
Franz Muheim
4/8/14, 8:30 AM
Flavour Physics and Beyond
With the successful start of the Large Hadron Collider at CERN
quark flavour physics has entered a new era. Unprecedented samples of
Beauty and charmed mesons and baryons have been collected
by the LHCb experiment, which was built for this purpose,
ATLAS and CMS also have large flavour physics
data samples and the Tevatron and B-factory experiments
continue to produce interesting...
Dr
Evgueni Goudzovski
4/8/14, 9:05 AM
Flavour Physics and Beyond
Observation of charged lepton flavour violation (CLFV) would provide a clear signal for physics beyond the Standard Model. Selected recent experimental results and near-term prospects for the searches for CLFV processes are discussed. The processes considered include μ→e conversion, μ→eγ decay and lepton flavour violating decays of the charged kaons.
Dr
Clark Griffith
4/8/14, 9:35 AM
Flavour Physics and Beyond
Measurement of a non-zero permanent electric dipole moment (EDM) would be clear evidence of a new source of CP violation outside of the quark mixing CKM matrix, and would be a possible signature of Supersymmetry. I will give an overview of current EDM experiments, including searches for atomic EDMs, recent improvements on the electron EDM upper bound measured in polar molecules, and the...
Dr
Helen O'Keeffe
4/8/14, 10:30 AM
The Neutrino Sector
In the last decade, neutrino experiments have provided overwhelming evidence for physics beyond the Standard Model. In this talk I will introduce the theory of neutrino oscillations and discuss current long-baseline neutrino oscillation experiments. Recent results from the T2K and MINOS experiments and prospects for the current generation of experiments will be presented.
Dr
Jeff Hartnell
4/8/14, 11:05 AM
The Neutrino Sector
Neutrinos are the second most abundant particle in the universe and yet one of the least understood. Their fundamental nature, whether they are their own antiparticle, is not yet known and the heaviest neutrino has a mass that we currently only known to within a range that spans about two orders of magnitude. In this talk I will review single beta decay experiments, which give us a model...
Dr
Ryan Nichol
4/8/14, 11:35 AM
The Neutrino Sector
Neutrino particle astrophysics is a frontier field at the crossroads of particle physics and astrophysics. Given the low fluxes of astrophysical neutrinos, gigantic detection volumes are necessary to detect the weakly interacting particles. The past twelve months have been an exciting time in the field on neutrino particle astrophysics, with the IceCube experiment claiming the first evidence...
Jonathan Davis
(IPPP, Durham University)
4/8/14, 1:00 PM
The CoGeNT collaboration claim to have observed a signal of light Dark Matter scattering off nuclei in their detector, to a significance of approximately 2.5 sigma. I will critically assess these recent, and earlier, claims. I present a Bayesian analysis of the 1136 live days CoGeNT data, with particular focus on the removal of surface events through the use of nuisance parameters. I derive...
Mr
Xingguo Li
(Manchester University)
4/8/14, 1:00 PM
The variable $\varphi^\star$ probes the same physical effects as the $Z/\gamma^\star$ boson transverse momentum, but is less susceptible to the effects of experimental resolution and efficiency. Using 10.4 fb$^{−1}$ of proton-antiproton collisions collected by the D0 detector at the Fermilab Tevatron, we measure the distribution of the variable $\varphi^\star$ in events containing dimuon pairs...
James Mccarthy
(University of Birmingham (GB))
4/8/14, 1:00 PM
Decays involving $\eta$ and $\eta\prime$ mesons are particularly interesting to
theorists, as they allow some insight into the relatively poorly
understood topic of $\eta-\eta\prime$ mixing. This subject has been covered
extensively using decays of $B$ and $B_s$ mesons, however, no equivalent processes have been observed in the baryonic sector. This talk outlines
the search for the rare...
Samuel Webb
(University of Manchester (GB))
4/8/14, 1:15 PM
The $\phi_{\eta}^{\star}$ angle of Drell-Yan di-lepton pairs probes initial state gluon radiation and its definition relies only upon the well-measured lepton directions. The $\phi_{\eta}^{\star}$ distribution is sensitive to similar but complementary physics to the intermediate boson transverse momentum distribution. A measurement of the normalised $\phi_{\eta}^{\star}$ differential cross...
Dr
Lea Reichhart
(University College London)
4/8/14, 1:15 PM
A large number of astronomical and cosmological observations point towards the existence of an unknown dark component dominating the matter content of our Universe. The most compelling candidates for dark matter are Weakly Interacting Massive Particles (WIMPs), which may be detected in low background experiments located deep underground, searching for direct interactions of WIMPs with...
Mr
Michael Kiss
(STFC (RAL))
4/8/14, 1:15 PM
Using the data from the LHCb experiment at CERN , the flavour structure of physics beyond standard model (SM) is probed using one of the rare B-decay channels, namely the $\Lambda_{b} \to pK\mu\mu$ decay. This decay occurs through a flavour changing neutral current process mediated by electroweak penguin and box diagrams in the SM. It is forbidden at the tree level and suppressed at the...
Mr
Guillaume Eurin
(University College London (UK))
4/8/14, 1:15 PM
The main goal of the SuperNEMO collaboration is to search for neutrinoless double-$\beta$ decay.
This would prove that the neutrino is a Majorana particle ($\nu$ = $\overline{\nu}$).
Today the best lower limits on half-lives of this process are set around 10$^{24}$ - 10$^{26}$ years as obtained by the NEMO-3 experiment (for the 2$\beta$ isotope $^{100}$Mo) and other experiments.
Several...
Robyn Lucas
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 1:15 PM
Supersymmetry scenarios in which squarks, particularly in the third generation,
are close in mass to the lightest supersymmetric particle are well motivated
and offer a possibility for hidden, natural SUSY. Traditional searches are insensitive to these compressed mass spectra scenarios due to the very soft decay products.
A search for light top squarks close in mass to the LSP at the CMS...
Mr
Adam Bailey
(Imperial College)
4/8/14, 1:30 PM
$^{85}$Kr is an anthropogenic radioisotope which makes up a very small fraction of the Kr abundance in the atmosphere, and contributes to the background in double-phase xenon detectors searching for WIMP dark matter. It has a half-life of 10.8 years and decays predominantly via a $\beta^-$ decay with an endpoint of 687 keV. Commercially available xenon procured for LUX contained 130 ppb g/g...
Christian Gutschow
(University College London (UK))
4/8/14, 1:30 PM
Events with jets produced in association with a $Z$ boson in proton-proton collisions can be used to study distributions sensitive to the vector boson fusion (VBF) process at CERN's Large Hadron Collider.
This process is interesting to study because of its similarity to the VBF production of a Higgs boson as well as its sensitivity to new physics via the WWZ triple gauge...
Pawel Guzowski
(University of Manchester)
4/8/14, 1:30 PM
The SuperNEMO experiment aims to search for neutrinoless double beta decay. If observed, this would show that the neutrino is its own antiparticle and be the first evidence for total lepton number violation. With 100 kg of source, a half-life sensitivity of order $10^{26}$ years (effective neutrino mass sensitivity down to 50 meV) can be achieved. The experimental techniques are similar to the...
Itzebelt Santoyo Castillo
(University of Sussex (GB))
4/8/14, 1:30 PM
The ATLAS experiment at the Large Hadron Collider (LHC) has collected an unprecedented
amount of data in the 3 years of data taking since its start. In this talk I will discuss the latest results from the Supersymmetry (SUSY) searches in events with three leptons (electron/muon/tau) in the final state. The search is performed on the full dataset collected by the experiment in 2012, at a...
Sam Cunliffe
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 1:30 PM
A status report for the analysis of $B^0\rightarrow K^{\star}(892)^{0} (\rightarrow K^+ \pi^-) \mu^+\mu^- $ decays at the LHCb detector at the LHC is presented. This process is the decay of a beauty meson to a vector meson final state and produces an angular distribution in the final state decay products. This angular distribution is highly sensitive to the contributions from Beyond Standard...
Zara Jane Grout
(University of Sussex (GB))
4/8/14, 1:45 PM
A search for supersymmetry is presented, using four or more leptons with the ATLAS detector using $\sqrt{s} =$ 8 TeV data taken at the LHC during 2012. The motivations for this search. optimisation procedure and background estimation are outlined, and results presented for a number of RPC and RPV interpretations.
Dr
Venus Keus
(University of Southampton)
4/8/14, 1:45 PM
Multi Higgs-doublet models (NHDMs) are amongst the simplest extensions of the Standard Model, motivated for instance by Supersymmetric scenarios. I will discuss NHDMs with various symmetry groups which contain viable dark matter candidates, preserved by the remnant of the symmetry after EWSB. I will describe the dark matter phenomenology of these models and look into new Higgs decay channels...
Peter Robert Davison
(University College London (UK))
4/8/14, 1:45 PM
This talk will present the first differential cross section measurements for the production of a Z boson produced in association with at least two b-jets. Data was collected using the ATLAS detector running at a centre of mass energy of 7 TeV during 2011. The analysis selects events with a leptonically decaying Z boson (to two electrons or two muons) produced in conjunction with two jets...
Dr
Joseph Walding
(Royal Holloway, University of London)
4/8/14, 2:00 PM
DEAP-3600 is a single-phase liquid Argon dark matter detector currently under construction at SNOLAB in Canada with first physics data expected in the summer, 2014. DEAP has been designed to achieve extremely low background rates, including those from 39Ar β decays, neutron scatters, and surface α contamination, with the goal of measuring the spin-independent WIMP-nucleon cross section down...
Simon Robert Magee Wright
(University of Cambridge (GB))
4/8/14, 2:00 PM
Measurements of the direct $CP$ asymmetry, $A_{CP}$, and the $CP$ difference in the $\mu^+ \mu^-$ forward-backward asymmetry, $\Delta A_{FB}$, are made for the $B^{0} \rightarrow K^{\star{0}}\mu^+\mu^-$ and $B^+ \rightarrow K^+\mu^+\mu^-$ decay modes using $pp$ collision data corresponding to an integrated luminosity of 3$fb^{-1}$ collected by LHCb in 2011 and 2012. The respective control...
Ashley Back
(Queen Mary, University of London)
4/8/14, 2:00 PM
The multi-purpose SNO+ detector, part of SNOLAB, is currently being filled with ultra-pure water, marking the first step before the addition of liquid scintillator and then Tellurium. While the level of water in the detector rises, the level of activity in preparation for commissioning is accordingly steadily increasing. Recent periods of continuous operation—each lasting of order two...
Craig Anthony Sawyer
(University of Oxford (GB))
4/8/14, 2:00 PM
One of the most challenges backgrounds to vector boson production in association with jets is that of QCD multijets. Current Monte Carlos struggle to model the background well and in adequate sample sizes. As a result data driven methods of estimation have been developed for use in precision analyses at the LHC. In this talk I will summarise the development of these methods in W+jet and R-jet...
Gareth Thomas Fletcher
(University of Sheffield (GB))
4/8/14, 2:00 PM
The strong production of Supersymmetric particles at the LHC offers one of the best current direct discovery prospects for Supersymmetry. This talk will focus on the event topologies of zero leptons 2-6 jets and missing transverse energy. Based on recent searches with the ATLAS detector on 8 TeV LHC data searching for squarks and gluinos.
Adrian Andrew Pritchard
(University of Liverpool (GB))
4/8/14, 2:15 PM
The decay of a $B_{s}^{0}$ meson to two oppositely charged $D_{s}$ mesons is one that is postulated to be almost exclusively CP even. Measuring the properties of this decay can therefore give important information about the behaviour of the $B_{s}^{0}$ system. This presentation will focus on the measurement of the inclusive branching fraction of $B_{s}^{0} \rightarrow D_s^{(\ast)+}...
Scott Stevenson
(University of Oxford (GB))
4/8/14, 2:15 PM
Central exclusive production (CEP) is a mechanism by which a final state is produced in isolation at central rapidity in an elastic collision. CEP provides a uniquely clean environment in which to carry out meson spectroscopy, and to search for evidence of phenomena such as gluon saturation. We introduce CEP and discuss the suitability of the LHCb detector to its study. LHCb measurements of...
Christopher Lucas
(University of Bristol (GB))
4/8/14, 2:15 PM
A search for Supersymmetry in the all-hadronic channel using the CMS detector will be presented. The analysis looks for a jets + MET signature using the alphaT kinematic variable. Events are categorised in independent bins of jet multiplicity, b-tagged jet multiplicity, and HT, the scalar sum of jet pT. Interpretations are shown in a variety of Simplified Model Spectra, including both...
Mark Lancaster
(University College London (UK))
4/8/14, 2:15 PM
The 2004 measurement of the muon’s anomalous magnetic moment by the E821 experiment at Brookhaven is the second most cited paper in experimental particle physics behind the observation of neutrino oscillations. This measured value differs by 3.6σ from the Standard Model (SM) prediction. This may be indicative of new physics beyond the SM or a statistical fluctuation. In this talk I will...
Hilal Kucuk
(University of London (GB))
4/8/14, 2:30 PM
Jets are defined choosing the anti-kt algorithm with two radius parameters of 0.4 and 0.6. The inclusive double-differential cross section measurement at $\sqrt{s}=$8 TeV at 2012 is performed as a function of jet transverse momentum, in bins of jet rapidity. The data sample with no pile-up has been collected on low mu run for detector calibration and “clean” physics studies. Additionally, it...
Dr
Sam Henry
(University of Oxford)
4/8/14, 2:30 PM
A key requirement of the g−2 experiment, aiming to measure the muon anomalous magnetic dipole moment to 0.14ppm, is to monitor the magnitude of the magnetic field around the storage ring to 0.07ppm. This will be done with several hundred proton NMR magnetometers. These must all be calibrated against a standard magnetometer, to account for the ~0.1ppm shifts of individual probes due to the...
Haofei Luo
(University of Edinburgh (GB))
4/8/14, 2:30 PM
Using 3fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s} = 7$ and 8 TeV by LHCb experiment in 2011 and 2012, first observation is made of the suppressed flavor changing neutral current (FCNC) decay mode $B_s^0 \to \phi (K^+ K^-) f_0(980) (\pi^+ \pi^-)$. In the $\pi^+ \pi^-$ invariant mass range below 1100 MeV/c$^2$, the branching ratio, using the reference decay $B_s^0 \to \phi \phi$, is...
Mireia Crispin Ortuzar
(University of Oxford (GB))
4/8/14, 2:30 PM
The Large Hadron Collider (LHC) ran in 2012 at the highest energy reached in a collider so far, allowing us to probe particle masses at the TeV scale. Strongly interacting particles at this mass scale are expected to decay in cascades, producing many jets from emissions of quarks and/or gluons and missing energy from weakly interacting daughters. This is the main target of the search for...
Dr
Malcolm Fairbairn
(King's College London)
4/8/14, 2:30 PM
The continuing search for dark matter will run into problems in the medium term future due to the background of neutrinos (especially from the Sun) which acts as a floor on the M-sigma plane beyond which it seems impossible to probe. We ask how far one can improve this situation using detailed energy, time and directional event information.
Andrew Edmonds
(UCL)
4/8/14, 2:45 PM
I will describe the COMET experiment, which will search for muon to electron conversion in aluminium, and I will also present some of the work I have done for it.
Joshuha Thomas-Wilsker
(Royal Holloway, University of London (GB))
4/8/14, 2:45 PM
The ATLAS experiment has several algorithms which are used to identify b-jets. In this talk I concentrate on the so-called “MV1” b-tagging algorithm, which includes information on displaced secondary vertices and the impact parameters of tracks as inputs into a Neural Network. To calibrate this b-tagging algorithm we test how well it works on b-jets in simulation and then compare this with its...
Mr
Richard Eggleston
(RHUL)
4/8/14, 2:45 PM
The Dark Matter Time Projection Chamber (DMTPC) project aims to detect the direction of dark matter-induced nuclear recoils, in order to correlate a candidate signal with the astrophysical dark matter wind associated with the Earth's motion through the galactic dark matter halo. This talk will discuss recent progress with emphasis on directionality.
Thomas Gillam
(University of Cambridge (GB))
4/8/14, 2:45 PM
The most recent ATLAS analysis searching for two like-charge or three leptons places improved bounds on several strongly-produced supersymmetric models, both simplified and phenomenological. Whilst the targeted event signatures have very low backgrounds from the standard model, there are contributions from fake and charge-flipped leptons. I shall present an overview covering the data-driven...
Mr
Sam Hall
(Imperial College London)
4/8/14, 2:45 PM
Elements of the Cabibbo-Kobayashi-Maskawa (CKM) matrix are accessible through a
variety of processes.
The Decay $B^+\!'\rightarrow D_s^+\phi$ is an annihilation diagram at tree
level, which is sensitive to $V_{ub}$.
While, contributions from the matrix element $V_{ts}$ are present in the loop
level decays $B^+\!\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and ...
Mr
Donal Hill
(University of Oxford, LHCb Experiment)
4/8/14, 3:00 PM
Determination of the CKM angle $\gamma = \mbox{arg}[-V_{ud} V_{ub}^{\star}/(V_{cd} V_{cb}^{\star})]$ is one of the key goals of the LHCb experiment. The cleanest method to access this weak phase is through measurements of $\gamma$-sensitive observables in $B^{\pm} \rightarrow DK^{\pm}$ and $B^{\pm} \rightarrow D\pi^{\pm}$ decays. The largest interference and asymmetries, and thus the greatest...
Felix Kahlhoefer
(University of Oxford)
4/8/14, 3:00 PM
Uncertainty in the local velocity distribution of dark matter is a key difficulty in the analysis of data from direct detection experiments. In my talk, I will propose a completely new approach for dealing with this uncertainty that does not involve any assumptions about astrophysics. By decomposing the dark matter velocity distribution into a sum of a large number of streams with different...
Ms
Amy Cottle
(University of Oxford)
4/8/14, 3:00 PM
Neutron electric dipole moment (nEDM) experiments require precision magnetometry to correct for systematic effects due to magnetic field fluctuations. I discuss the options for such magnetometers and present details of a 12-SQUID magnetometry system constructed for use in a cryogenic nEDM experiment. This has been developed to operate in 0.5 K superfluid helium and installed and tested in...
Kees Jan De Vries
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 3:00 PM
We show the results of global fits of the two constrained models of supersymmetry (SUSY): the constrained MSSM (cMSSM) and non-universal Higgs mass "1" (NUHM1). We take into account constraints from cosmology, electroweak precision observables, B-physics, Higgs physics and direct searches for SUSY at the LHC.
Jeson Abe Jacob
(University of Bristol (GB))
4/8/14, 3:00 PM
Measurements of the top-quark pair differential cross-section with respect to global distributions including missing transverse energy, scalar sum of jet transverse momenta, scalar sum of total event scalar sum, leptonic W boson transverse momentum and leptonic W boson transverse mass have been carried out on 19.7fb-1 of data at 8TeV obtained from the CMS detector at the LHC. After...
Oliver Burrow
(University of Liverpool)
4/8/14, 3:15 PM
Atom interferometers are precision instruments, currently capable of measuring forces an unprecedented precision, with this precision becoming more precise with the development of new techniques. Using atomic interferometers, a parameter search can be made to investigate the dark contents of the vacuum and shed some light on fundamental physics questions such as "What is the nature of dark...
Mr
Duncan Leggat
(University of Brunel)
4/8/14, 3:15 PM
The observation of the associated production of a single top quark and W boson using 12.2 fb$^{-1}$ of pp collisions at $\sqrt{s} = 8$ TeV with the CMS experiment is presented. A multivariate analysis based on kinematic variables was used to discriminate signal from the dominant ttbar background. The observed signal has a significance of 6.0$\sigma$ and a cross section of...
Carl Jeske
(University of Warwick)
4/8/14, 4:00 PM
I will present results of a search for the 125 GeV Higgs boson decaying to a pair of tau leptons. The dataset used is 20.3fb$^{-1}$ of proton-proton collision recorded by the ATLAS detector at a centre of mass energy of 8 TeV. The observed (expected) deviation from the background only hypothesis corresponds to a significance of 4.1 (3.2) standard deviations. The measured signal strength is...
Mr
Andrew Furmanski
(University of Warwick)
4/8/14, 4:00 PM
The T2K experiment is a long baseline neutrino oscillation experiment.
One of the largest sources of uncertainty in neutrino oscillation experiments comes from our poor understanding of neutrino interaction cross-sections.
I will explain why this is the case, and summarise the work that is being done to improve on the current situation.
Nazim Hussain
(University of Oxford (GB))
4/8/14, 4:00 PM
Charged $B$ decays of the form $B^\pm \rightarrow DK^\pm$ (where $D$ represents either a $D^0$ or a $\bar{D^0}$) are powerful tools in the measurement of the $CP$-violating CKM angle $\gamma$. Channels where the $D$ decays to a final state involving a $\pi^0$, such as $D \rightarrow \pi^\pm K^\mp \pi^0$, $D \rightarrow \pi^\pm \pi^\mp \pi^0$ and $D \rightarrow K^\pm K^\mp \pi^0$ are promising...
Mr
Ryan Wilkinson
(IPPP, Durham University)
4/8/14, 4:00 PM
Despite the large number of dedicated experiments, an understanding of the particle nature of dark matter and direct evidence for its existence have remained elusive. However, detection methods generally assume that dark matter consists of cold, massive particles (CDM). In this talk, I will discuss how cosmological data from the CMB and Large-Scale Structure can be used to study dark matter...
Iain Haughton
(University of Manchester (GB))
4/8/14, 4:15 PM
I present an overview on the development of cutting edge 3D diamond and 3D silicon detectors for future upgrades of LHC experiments, with a focus on work done in Manchester. A 3D geometry and its beneficial effects on a detectors radiation tolerance, signal speed and power dissipation have been extensively studied in silicon. As such, 3D silicon is a proven technology; it is included in the...
Ludovica Aperio Bella
(University of Birmingham (GB))
4/8/14, 4:15 PM
This contribution will review the latest ATLAS results on the properties of the Higgs boson in the decay channel $H\rightarrow ZZ\rightarrow 4\ell$ using approximately 25 fb-1 of pp collision data collected during the LHC Run1 at 7 TeV and 8 TeV. The measurements of the mass and the couplings of the newly discovered boson are presented together with the spin-parity analysis results.
Daniel Charles Craik
(University of Warwick (GB))
4/8/14, 4:15 PM
Dalitz plot analyses of $B^0_{(s)}\rightarrow D^0K\pi$ are interesting for multiple reasons. The decay $B^0\rightarrow D^0K\pi$ can be used to make a measurement of the CKM angle $\gamma$. The $B^0_s$ decay is interesting both as a potential background to the $\gamma$ measurement but also to obtain branching fraction measurements for the various two body decays that contribute to...
Pip Hamilton
(Imperial College London)
4/8/14, 4:15 PM
Cross-section measurements are extremely important for reducing systematic uncertainties in neutrino oscillation experiments, but are limited by our understanding of effects inside the target nucleus. Measuring neutrino interactions in gaseous detector allows the models used to simulate these effects to be empirically tested, thanks to the high spatial resolution of the detector and the...
Henrique Araujo
(Imperial College London)
4/8/14, 4:15 PM
The LUX-ZEPLIN (LZ) experiment is a next-generation search for Weakly Interacting Massive Particles, scaling the very successful double-phase xenon technology to multi-tonne target mass. LZ will be deployed at the 4850-ft level of the Sanford Underground Research Facility (South Dakota, USA) after completion of LUX, which is presently operating there. At its core, LZ will feature a 7-tonne...
Dr
Chamkaur Ghag
(University College London)
4/8/14, 4:30 PM
The LZ dark matter experiment will require an unprecedented low background rate within its fiducial volume, defining strict constraints on radioactivity from construction materials that is further mitigated through the combination of powerful self-shielding from liquid xenon, 3D event vertex reconstruction, and external veto detector systems. An aggressive screening campaign with cutting-edge...
Kate Doonan
(University of Glasgow (GB))
4/8/14, 4:30 PM
Planar pixel sensors based on the Front-End-I4 (FE-I4) read-out developed for the Insertible b-Layer (IBL) are being characterised in laboratory tests and in test beams. Systematic tests are being performed to judge the performance of these sensors and read-out chips. Multiple geometries of pixel sensor have been developed. Laboratory tests include threshold and time-over-threshold tuning as...
Rafael Silva Coutinho
(University of Warwick (GB))
4/8/14, 4:30 PM
The study of charmless three body decays with final states including a $K^{0}$ meson has an extensive number of application.
In this talk a review of the recent and ongoing analyses at LHCb will be reported. First, a search for previously unobserved decays of beauty baryons to the final states `$K^{0}_{\mathrm{S}}p\pi^{-}$` and `$K^{0}_{\mathrm{S}}pK^{-}$` is reported. The analysis is based...
Matthew Ian Jackson
(University of Liverpool (GB))
4/8/14, 4:30 PM
Since its discovery a large effort has been made to improve analyses and confirm the properties of the Higgs Boson. At a mass of 125 GeV Higgs to $b\bar{b}$ is the dominant decay mode, however large QCD backgrounds prevent direct analysis, instead an analysis of Higgs to $b\bar{b}$ is considered where the Higgs is produced in association with a Vector Boson ($W$/$Z$). A brief overview of this...
Mr
Michail Lazos
(Liverpool University)
4/8/14, 4:30 PM
To study the neutrino interaction with one proton at the final state we need to make a proton selection. I will present my latest results of my proton selection. It is a very interesting channel and help us understand the CP violation in the lepton sector. The theory is well understood but the analysis is challenging as the background is much greater than the signal.
Simon Peeters
(University of Sussex)
4/8/14, 4:45 PM
Building on the experience with single-phase Liquid Argon detectors, wich are particularly well-suited for high-mass WIMP sensitivity, I will present a conceptual design for a next-generation 50-tonne detector. In this large detector, surface background events which are one of the primary concerns for DEAP-3600, are mitigated more readily with position reconstruction, ultimately allowing a...
John Beddow
(University of Glasgow (GB))
4/8/14, 4:45 PM
Results from the recently published search for the rare decays $ {B^0}\to p\bar{p} $ and $ B_s^0\to p\bar{p} $ carried out using 0.92 fb$^{-1}$ of 7 TeV proton-proton collisions collected by the LHCb experiment in 2011 will be presented ([arXiv:1308.0961 [hep-ex]][1]). The talk covers the physics motivation for the analysis and the tensions between existing theoretical predictions of the...
Ian Allan Connelly
(Royal Holloway, University of London)
4/8/14, 4:45 PM
With the expected reach of ttH(H$\to$bb) not quite approaching Standard Model sensitivity, it is important to squeeze as much information out of the data as possible. The matrix element method calculates the probability of an event coming from signal (ttH) and background (ttbb) decay process by calculating the most likely kinematics of the hard scattering partons and comparing with the...
Mr
Dominic Brailsford
(Imperial College)
4/8/14, 4:45 PM
We present the physics opportunities which can be explored with the Electromagnetic Calorimeters (ECals) of the Tokai-to-Kamioka (T2K) off-axis near detector (ND280). Due to the ECal's high mass, a large fraction of the neutrinos incident on ND280 interact within the constituent lead layers which form the ECal. This makes the ECal an excellent detector for use in making the world's first...
Manuel Proissl
(University of Edinburgh (GB))
4/8/14, 5:00 PM
An updated direct search for a Standard Model Higgs boson decaying into pairs of $b$ quarks in association with a W or Z boson using the ATLAS detector at the LHC is presented. The search is performed in the three decay modes $ZH\rightarrow\nu\nu b\bar{b}$, $WH\rightarrow\ell\nu b\bar{b}$ and $ZH\rightarrow\ell\ell b\bar{b}$ with $\ell$ denoting either electrons or muons and has to cope with...
Luke Southwell
(Lancaster University)
4/8/14, 5:00 PM
In 2014 the T2K experiment will reverse the polarity of the magnetic horns
and begin running with an anti-neutrino beam for the first time. Differences
in the oscillation probabilities between neutrinos and anti-neutrinos may provide
insight into charge-parity violation in the leptonic sector. In order to
measure the the anti-electron neutrino contamination in T2K's anti-muon...
Francis Oliver Newson
(University of Birmingham (GB))
4/8/14, 5:00 PM
Heavy neutrinos are predicted by many beyond-the-Standard-Model theories of
particle physics, with proposed masses ranging from a few eV/$c^{2}$ up to the
Planck scale. Two-body kaon decays provide a method to search for these
particles in a model independent manner, for masses between 100 MeV/$c^{2}$ and
388 MeV/$c^{2}$. In 2007, the NA62 experiment at CERN collected a large sample...
Mark Elliot Smith
(University of Manchester (GB))
4/8/14, 5:00 PM
The method for the measurement of two charm CP violating observables, $A_{\Gamma}$ and $y_{CP}$, is presented. The results for $A_{\Gamma}$ are shown to be the most precise to date.
Euan Niall Cowie
(University of Bristol (GB))
4/8/14, 5:00 PM
TORCH (Time Of internally Reflected CHerenkov radiation) is an innovative time-of-flight system designed to provide particle identification over large areas up to a momentum of 10 GeV/c. Cherenkov photons emitted within a 1 cm thick quartz radiator are propagated by internal reflection and imaged on to an array of Micro-Channel Plate photomultiplier tubes (MCPs).
Performing 3-$\sigma$...
Allan Kenneth Lehan
(University of Liverpool (GB))
4/8/14, 5:15 PM
Long lived neutral particles that decay within the volume of a particle detector to a photon and a dark matter candidate will leave a unique signature which cannot be explained by any Standard Model process providing clear evidence of new physics.
This talk will present an analysis performed on the data collected by the ATLAS Collaboration in 2011 at a center of mass energy of 7TeV...
Samuel Thomas Harnew
(University of Bristol (GB))
4/8/14, 5:15 PM
Although mixing in neutral K and B systems has long been established, mixing in neutral D mesons has only recently been observed. In fact, in 2012 LHCb published the first single observation of D mixing in $D^{0}
\to K^{-}\pi^{+}$ decays.
LHCb has now collected enough data to study D mixing in multi-body D decays such as $D^{0} \to K^{+}\pi^{-}\pi^{0}$ and $D^{0} \to...
Thomas Bird
(University of Manchester (GB))
4/8/14, 5:15 PM
A major upgrade of the LHCb experiment is planned to start taking data in 2020.
The LHCb Vertex Locator will be replaced by a new and highly novel detector.
It will be based on radiation hard hybrid pixel sensors, with a pixel dimension of $55\times{}55\,{\mu{}}\text{m}$, cooled using $\text{CO}_2$ flowing through microchannels integrated into the silicon.
During operation, the sensors...
Ines Ochoa
(University of London (GB))
4/8/14, 5:15 PM
One of the main results of the Large Hadron Collider Run I was the discovery of the Higgs boson by ATLAS and CMS experiments. The boson has been discovered with a mass of around 125 GeV and all measurements performed so far are compatible with the Standard Model predictions.
However, clear evidence of the boson decaying to a pair of $b$-quarks has not been observed yet, despite it being...
Ms
Linda Cremonesi
(Queen Mary University of London)
4/8/14, 5:15 PM
Hyper-Kamiokande is a next generation underground water Cherenkov detector which will serve as far detector of a long-baseline neutrino experiment in Japan (the natural extension of the already successful T2K experiment).
The upgraded facilities at J-PARC will deliver an off-axis narrow band (~0.6 GeV) (anti-)neutrino beam (750kW~1MW) and direct it to Hyper-K that will measure the...
Daniele Mirarchi
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 5:30 PM
One of the main challenges at the CERN Large Hadron Collider (LHC) is to handle the unprecedented stored beam energies that are expected to be up to 360MJ with 7~TeV beams at 25~ns bunch spacing. This may increase to 500~MJ in the LHC High Luminosity upgrade project (HL-LHC). A complex collimation system, able to intercept and to absorb beam halo particles efficiently is used to minimize...
Mr
Thomas Stainer
(University of Liverpool)
4/8/14, 5:30 PM
LAGUNA-LBNO (Large Appartus studying Grand Unification and Neutrino Astrophysics for Long Baseline Neutrino Oscillations) is a feasibility study with the intent to host next generation neutrino detectors. These experiments possess the ability to probe the universe further with proposed detectors of the 100 kton scale. A basic overview of the long baseline experiment is presented with the focus...
Marc Bret Cano
(University of London (GB))
4/8/14, 5:30 PM
The ATLAS detector at the Large Hadron Collider is used to search for high mass resonances decaying to an electron-positron pair or a muon-antimuon pair. Results are presented from the analysis of pp collisions at a center-of-mass energy of 8 TeV corresponding to an integrated luminosity of approximately 21 $fb^{−1}$. A narrow resonance with Standard Model Z couplings to fermions is excluded...
Benedict Allbrooke
(University of Birmingham (GB))
4/8/14, 5:30 PM
The most recent published results for the ATLAS search for a Standard Model Higgs Boson decaying to bb in association with a W boson will be presented. The Higgs decay to bb is a crucial test of the Standard Model Higgs Boson but the search must be made in associated production modes. The search has been performed using 4.7 fb$^{-1}$ of data collected at $\sqrt{s}$=7TeV and 20.3 fb$^{-1}$ at...
Paul Scovell
(University of Oxford)
4/8/14, 5:30 PM
Maintaining stable operating conditions is of utmost importance in any dark matter detector. The LZ detector will be the largest two-phase liquid xenon detector ever constructed and as such will require unsurpassed levels of monitoring. This talk will discuss R&D efforts to this end in the UK and will cover the development of position, liquid level and piezo-electric bubble sensors and of loop...
Dr
Alfredo Tomas Alquezar
(Imperial College London)
4/8/14, 5:45 PM
LUX-ZEPLIN (LZ) is a next-generation direct dark matter search experiment based on a 7-tonne double-phase xenon detector. The large active xenon target brings many benefits, namely outstanding self-shielding of an inner fiducial volume, but also some practical challenges, in particular the need to provide high voltages to sustain the required electric fields. LZ is undertaking a comprehensive...
Mr
William Shields
(Royal Holloway, University of London)
4/8/14, 5:45 PM
Diamond Light Source is a third generation synchrotron facility dedicated to producing radiation of outstanding brightness. Above a threshold current, the electron bunches are susceptible to a phenomenon known as the microbunching instability. The key feature of this instability is the emission of coherent radiation bursts, which have wavelengths of the order of the bunch length and smaller....
Mr
Joseph O'Connor
(University College London)
4/8/14, 5:45 PM
Analysis of the complete set of MINOS accelerator and atmospheric data, combining `$\nu_{\mu}$` disappearance and `$\nu_{e}$` appearance, was published in March 2014. This yielded precision measurements of `$\Delta m^{2}_{32}$` and `$sin^{2}(\theta_{23})$` as well as early constraints on `$\delta_{CP}$`. The first results from MINOS+, adding 2 years of atmospheric and 6 months of beam...
Jon Harrison
(University of Manchester (GB))
4/8/14, 5:45 PM
We report on searches for the lepton-flavour violating decay $\tau^-\rightarrow\mu^-\mu^+\mu^-$ and the lepton-flavour and baryon-number violating decays $\tau^-\rightarrow p\mu^-\mu^-$ and $\tau^-\rightarrow\bar{p}\mu^+\mu^-$, carried out using 1.0 inverse femtobarn of proton-proton collision data taken by the LHCb experiment at 7 TeV during 2011.
No evidence has been found for any signal,...
Thomas Olivier Ravenscroft
(University of Glasgow (GB))
4/8/14, 5:45 PM
Presented is a method to improve the b-jet energy resolution with the task of increasing the signal sensitivity in searches decaying to a b, anti-b quark pair in the final state. The machinery has been tested using Monte Carlo simulated samples in the process $WH \rightarrow l\nu bb$. The method trains a function through regression applying a correction factor to bring the reconstructed jet...
Dr
Paolo Beltrame
(University of Edinburgh)
4/8/14, 6:00 PM
Whilst Weakly Interactive Massive Particles (WIMPs) remain the favoured candidates for dark matter, recent LHC results significantly constrain the available parameter space for several models, including supersymmetric neutralinos. Amongst alternative explanations for the astrophysical evidence of dark matter, axions – more specifically the so-called ‘invisible’ axions and axion-like-particles...
Rebecca Charlotte Lane
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 6:00 PM
A search for the standard model Higgs boson decaying into a pair of tau leptons is presented, using data recorded by the CMS experiment in 2011 and 2012. The analysis includes all 6 possible final states of the two taus, each of which decays either hadronically or leptonically into an electron or muon. An excess of events over the expected contribution from backgrounds is observed,...
Dr
Peter Millington
(University of Manchester and IPPP, Durham University)
4/8/14, 6:00 PM
In arXiv: 1312.3871, we introduce a way to compute transition amplitudes in quantum field theory for scatterings between sources and detectors, that is scatterings over finite space-time domains. Our amplitudes are manifestly causal, by which we mean that the source and detector are always linked by a connected chain of retarded propagators. We illustrate how these amplitudes may be obtained...
Scott Mandry
(University College London, Max-Planck-Institut für Physik)
4/8/14, 6:00 PM
Nick Ryder
(University of Oxford (GB))
4/8/14, 6:00 PM
Oscillation to sterile neutrinos is considered as a possible explanation for the reactor and Gallium neutrino anomalies, which both measured a deficit of neutrinos at short distances from the respective sources.
The SoLid experiment will test this hypothesis by measuring neutrino energy spectra between 6-8 m from a reactor core and looking for distortions in the spectra at different distances...
Mr
Christian Thomay
(University of Bristol)
4/8/14, 6:15 PM
We present a novel approach to the detection of special nuclear material using cosmic rays. Muon Scattering Tomography (MST) is a method for using cosmic muons to scan cargo con- tainers and vehicles for special nuclear material. Cosmic muons are abundant, highly penetrating, not harmful for organic tissue, cannot be screened against, and can easily be detected, which makes them highly suited...
Sam Telfer
(The University of Sheffield)
4/8/14, 6:15 PM
João Pela
(Imperial College Sci., Tech. & Med. (GB))
4/8/14, 6:15 PM
All measurements of the 125 GeV boson to date indicate compatibility with a SM Higgs boson, but the associated uncertainties are large, and the possibility for non-SM properties remains. In addition, although additional SM-like Higgs bosons have been excluded over a wide mass range, additional Higgs bosons with exotic decay modes remains a possibility, and are predicted by many models....
Mr
Michele Re Fiorentin
(University of Southampton)
4/8/14, 6:15 PM
I shall briefly review the main aspects of leptogenesis, describing both the unflavoured and the flavoured versions of the $N_2$-dominated scenario. A study of the success rates of both classes of models has been carried out and I will comment on that, as well as on the incidence of corrective effects to the simplest scenario. I will then focus on the flavoured case and consider the conditions...
Prof.
Geoff Hall
(Imperial College London)
4/9/14, 8:30 AM
Detectors and Accelerators, Near and Far Future
Over the next decade a series of upgrades to both the LHC machine and the experiments which operate at the LHC will be carried out. Some of them are already under way. A brief summary will be given of the motivations for detector upgrades, with the accelerator schedule as it is currently foreseen, and a short review of the major elements of the upgrade plans for the four LHC experiments,...
Dr
Frank Zimmermann
(CERN)
4/9/14, 8:55 AM
Detectors and Accelerators, Near and Far Future
Options for the next high-energy electron-positron collider are reviewed, by comparing a linear-collider design - the ILC - with proposed circular collider Higgs factories such as FCC-ee/TLEP. This presentation sketches relative construction costs, some key intrinsic features of circular and linear colliders, issues related to electrical power consumption, interaction-point spot sizes,...
Dr
Morgan Wascko
4/9/14, 9:25 AM
The Neutrino Sector
The next generation of accelerator neutrino oscillation experiments will have significant discovery potential for CP violation in the lepton sector. I will review the physics prospects of these experiments, with emphasis on the UK's role in them.
Prof.
Sheila Rowan
4/9/14, 9:55 AM
Particle Astrophysics, Current and Future
This talk will cover the status of activities for the construction and
commissioning of the imminent generation of the gravitational GW
detectors due to start first science runs next year. It will focus on
the status of and plans for the Advanced LIGO observatories (in Hanford
Washington, and Livingston Louisiana, USA) and Advanced Virgo (near
Cascina, Italy), and their operation in the...
Prof.
Silvia Pascoli
4/9/14, 11:00 AM
The Neutrino Sector
With the discovery of neutrino oscillations, the existence neutrino masses have been established pointing towards new Physics beyond the Standard Model. New compelling questions are open for the future: is lepton number conserved? Is there CP-violation? Where does the observed leptonic flavour structure come from? After a very brief overview of the related phenomenological issues, I will...
Prof.
John March-Russell
4/9/14, 11:30 AM
Flavour Physics and Beyond
Dr
Vladimir Shiltsev
4/9/14, 12:00 PM
Detectors and Accelerators, Near and Far Future
Particle colliders for high-energy physics have been in the forefront of scientific discoveries for more than half a century. The accelerator technology of the colliders has progressed immensely, while the beam energy, luminosity, facility size, and cost have grown by several orders of magnitude. The method of colliding beams has not fully exhausted its potential but has slowed down...
Prof.
John Womersley
(STFC)
4/9/14, 2:00 PM
Prof.
Matt Griffin
4/9/14, 2:30 PM
Prof.
Tatsuya Nakada
(Ecole Polytechnique Federale de Lausanne (CH))
4/9/14, 4:00 PM
Prof.
Alison Davenport,
Dave Wark
(RAL / Imperial College London), Prof.
Grahame Blair
(STFC), Prof.
John Womersley
(STFC), Prof.
Philip Burrows
(Oxford University), Prof.
Tatsuya Nakada
(Ecole Polytechnique Federale de Lausanne (CH))
4/9/14, 4:25 PM
Chris Quigg
(Fermi National Accelerator Lab. (US))
The Energy Frontier Programme
plenary talk
I will summarize the theoretical context for the search for the avatar of electroweak symmetry breaking, review what we have learned about $H(125)$, and outline what we need to learn about the new particle. I will describe some of the questions raised and opportunities opened by the discovery of $H(125)$, and how they influence our thinking about future accelerators. Finally, I will try to...
Calum Michael Macdonald
(University of Sheffield (GB))
Poster Session
poster
This poster presents the current status of a search for direct production of sbottom and stop scalar quarks with a 50% branching ratio for sbottom or stop decays into neutralinos or charginos. In this search the mass difference between the lightest chargino and lightest neutralino is assumed to be small. Presented here is the current state of the analysis of final states consisting of 2...
Mr
Nathan Woollett
(Lancaster University)
Poster Session
poster
Currently there are a number of ‘Light Shining Through a Wall’(LSW) experiments taking place to search for weakly-interacting sub-eV particles(WISPs). The hidden sector photon(HSP) is an example of a WISP which, if massive, could be detected though kinetic mixing with the Standard Model photon. As HSPs do not couple electrically, they can be searched for using an LSW experiment. For HSP rest...
Mr
Thomas Warburton
(University of Sheffield)
The Neutrino Sector
poster
Cosmogenic background for a 10 kton liquid Argon time projection chamber (LAr-TPC) surface detector for LBNE is simulated. It is found that through the use of effective cuts a detector would be able to observe neutrino oscillation. The effectiveness of these cuts is hoped to be shown through analysis of a 35 ton prototype that takes data in early 2015.
Dr
James Nikkel
(Royal Holloway University of London)
Particle Astrophysics, Current and Future
plenary talk
Physicists are still looking for what makes up most of our galaxy, and while there may be some hints, dark matter still has not been conclusively observed in the lab. I will present the current status of direct dark matter detection and the direction in which this research is headed.
Dr
Clark Griffith
(University of Sussex)
Flavour Physics and Beyond
plenary talk
Measurement of a non-zero permanent electric dipole moment (EDM) would be clear evidence of a new source of CP violation outside of the quark mixing CKM matrix, and would be a possible signature of Supersymmetry. I will give an overview of current EDM experiments, including searches for atomic EDMs, recent improvements on the electron EDM upper bound measured in polar molecules, and the...
Geoff Hall
(Imperial College Sci., Tech. & Med. (GB))
Detectors and Accelerators, Near and Far Future
plenary talk
Over the next decade a series of upgrades to both the LHC machine and the experiments which operate at the LHC will be carried out. Some of them are already under way. A brief summary will be given of the motivations for detector upgrades, with the accelerator schedule as it is currently foreseen, and a short review of the major elements of the upgrade plans for the four LHC experiments,...
Mr
Matthew Thiesse
(University of Sheffield)
Poster Session
poster
The Long-Baseline Neutrino Experiment 35-ton prototype detector was built to evaluate and demonstrate liquid argon time projection chamber design elements specific to the full-scale LBNE far detector, such as modular anode plane assembly elements and membrane cryostat technologies. The work presented here relates to several areas of liquid argon detector R&D involving argon purity and high...
Helen O'Keeffe
(L)
The Neutrino Sector
plenary talk
In the last decade, neutrino experiments have provided overwhelming evidence for physics beyond the Standard Model. In this talk I will introduce the theory of neutrino oscillations and discuss current long-baseline neutrino oscillation experiments. Recent results from the T2K and MINOS experiments and prospects for the current generation of experiments will be presented.
Mr
Michael Wallbank
(University of Sheffield)
Poster Session
poster
The ND280 uses different sub-detectors in an attempt to reconstruct particle tracks as accurately as possible for analysis and in
order to understand the neutrino beam structure before oscillation occurs. Integral to this process are the Electromagnetic
Calorimeters (ECals), used for the reconstruction of neutral particles and the identification of charged particles. Some analyses,
such as...
Hilal Kucuk
(University of London (GB))
Poster Session
poster
Jets are defined choosing the anti-kt algorithm with two radius parameters of 0.4 and 0.6. The inclusive double-differential cross section measurement at $\sqrt{s}=$8 TeV at 2012 is performed as a function of jet transverse momentum, in bins of jet rapidity. The data sample with no pile-up has been collected on low mu run for detector calibration and “clean” physics studies. Additionally, it...
Mr
David Woodward
(The University of Sheffield)
Poster Session
poster
Muon transport simulations have been performed in Geant4 to test the sensitivity of muon tomography for monitoring carbon storage. An accurate geological model of the overburden above the Boulby mine has been used and CO2 injection is simulated by changing the bulk density of a volume of rock. The change in muon flux through a 1000 m^2 detector at a depth of 776 m after CO2 injection is...
Mr
Anthony Ezeribe
(University of Sheffield)
Poster Session
poster
Radon Progeny Recoils (RPRs) have been identified as a major source of background emanating from the vessel in DRIFT dark matter experiment. We present our R&D work towards developing a new data acquisition system with low radon prone materials at reduced cost for the new generations of the detector, DRIFT IIe and DRIFT III due for installation by June 2014 and 2020 respectively. A low radon...
Jeff Hartnell
(University of Sussex)
The Neutrino Sector
plenary talk
Neutrinos are the second most abundant particle in the universe and yet one of the least understood. Their fundamental nature, whether they are their own antiparticle, is not yet known and the heaviest neutrino has a mass that we currently only known to within a range that spans about two orders of magnitude. In this talk I will review single beta decay experiments, which give us a model...
Ryan Nichol
(UCL)
Particle Astrophysics, Current and Future
plenary talk
Neutrino particle astrophysics is a frontier field at the crossroads of particle physics and astrophysics. Given the low fluxes of astrophysical neutrinos, gigantic detection volumes are necessary to detect the weakly interacting particles. The past twelve months have been an exciting time in the field on neutrino particle astrophysics, with the IceCube experiment claiming the first evidence...
Ms
Talitha Bromwich
(University Of Sussex)
Particle Astrophysics, Current and Future
poster
DEAP-3600 is a liquid Argon-based dark matter detection experiment which utilises the organic crystalline solid 1,1,4,4-tetraphenyl-1,3-butadiene (TPB) to absorb scintillated 128nm UV light and re-emit it as 440nm visible light. Here I present the results of TPB evaporations and techniques for analysing the topography of the TPB layer using an atomic force microscope, preliminary tests on...
Craig Anthony Sawyer
(University of Oxford (GB))
Poster Session
poster
2012 saw unprecedented levels of pile-up (multiple interactions per bunch crossing) in collisions at the LHC. This presented a challenging environment in which to calibrate jets for use in both precision analyses and new physics searches. This poster details the jet-area-based pile-up suppression techniques that were developed by ATLAS for 2012 data taking and form the first stage in the jet...
Anthony Challinor
(University of Cambridge)
Particle Astrophysics, Current and Future
plenary talk
I review the main cosmology results from the 2013 Planck release. I will also discuss some developments since the original submission of the papers, and put the Planck results in the context of more recent results from the BICEP2 experiment.
Dr
Evgueni Goudzovski
(University of Birmingham)
Flavour Physics and Beyond
plenary talk
Observation of charged lepton flavour violation (CLFV) would provide a clear signal for physics beyond the Standard Model. Selected recent experimental results and near-term prospects for the searches for CLFV processes are discussed. The processes considered include $\mu\to e$ conversion, $\mu\to e\gamma$ decay and lepton flavour violating decays of the charged kaons.
Dr
Frank Zimmermann
(CERN)
Detectors and Accelerators, Near and Far Future
plenary talk
Options for the next high-energy electron-positron collider are reviewed, by comparing a linear-collider design - the ILC - with proposed circular collider Higgs factories such as FCC-ee/TLEP. This presentation sketches relative construction costs, some key intrinsic features of circular and linear colliders, issues related to electrical power consumption, interaction-point spot sizes,...
Henning Flacher
(University of Bristol (GB))
The Energy Frontier Programme
plenary talk
The search for physics beyond the Standard Model is a priority in the physics programme of the ATLAS and CMS collaborations. These searches cover a wide variety of experimental signatures and proposed models, ranging from, e.g., supersymmetry to heavy gauge bosons, extra dimensions and dark matter. In this talk the latest results obtained with up to 20/fb of data collected at 8 TeV...
Bill Murray
(University of Warwick (GB))
The Energy Frontier Programme
plenary talk
The LHC Higgs programme has been spectacularly successful in discovering what has been variously called 'A new boson', 'a Higgs-like boson' and 'a Higgs boson' even while the machine was running well below design energy. But what do we really know about this particle? Why don't we just call it 'The Higgs boson', and will we ever do so? And what can it tell us about the remaining mysteries such...
Mr
Samuel Timothy Spencer
(University of Durham)
Poster Session
poster
Artificial neural networks, such as multi-layer perceptrons, are computer programs designed to mimic the pattern recognition performed by organic brains. They have many uses in particle physics and astronomy, where a small signal is swamped by a large (but identifiable background). In this poster we will present a novel implementation of a neural net to detect and classify sources with both...
Mr
Andrew Scarff
(University of Sheffield)
Poster Session
poster
This work is to progress with R&D on using Thick GEMs (ThGEM) in a gaseous time projection chamber (TPC) for directional particle detection. It has the potential to be used for low mass WIMP detection with a major area of work being to focus electrons to smaller electrodes to lower the costs in any scale up that may be required.
Javier Alberto Murillo Quijada
(University of Birmingham (GB))
Poster Session
poster
A preliminary study of the top-quark width ($\Gamma_{top}$) is performed using the ATLAS collaboration official Monte Carlo (MC) samples corresponding to proton-proton collisions with centre of mass energy of $\sqrt{s}$ = 8 TeV and scaled to integrated luminosity $\int Ldt$ = 20.3$fb^{-1}$. Templates with different values of $\Gamma_{top}$ are generated assuming an underlying truth top mass...
