Conveners
Track 4
- Benjamin Still (Queen Mary, University of London)
Track 4
- Georgios Christodoulou (University of Liverpool)
Track 4
- Melissa George (Imperial College London)
Dr
Melissa George
(Imperial College)
4/9/13, 8:45 AM
Parallel Track 4
Muon ionization cooling is the only solution to prepare the high brilliance muon beams that are necessary for a Neutrino Factory or Muon Collider. The International Muon Ionization Cooling Experiment (MICE) is a collaboration of over 70 scientists from 9 countries and is under development at the Rutherford Appleton Laboratory. MICE aims to be the first experiment to observe the ionizaion...
Richard David Mudd
(University of Birmingham (GB))
4/9/13, 8:57 AM
Parallel Track 4
Updated search results and property measurements are presented in the H->ZZ->4l decay channel using proton-proton collision data collected by the ATLAS detector during the 2011 and 2012 LHC runs.
An excess of events consistent with the production of a Standard Model Higgs Boson is observed at a mass of around 125 GeV.
The couplings of the new particle are probed for the first time with this...
Andrew Daniells
(University of Birmingham (GB))
4/9/13, 9:09 AM
Parallel Track 4
Following the recent discovery, the ATLAS collaboration is performing detailed studies on the properties of the new boson. An important ingredient for these studies is the signal selection efficiency, which is studied using a Tag-and-Probe method applied on 20.7 fb^{-1} of Z->mumu and Z->ee data recorded by the ATLAS detector at \sqrt{s}=8TeV. Also, a technique to improve the signal mass...
Nicola Anne Skidmore
(STFC - Science & Technology Facilities Council (GB))
4/9/13, 9:21 AM
Parallel Track 4
An analysis to measure the parameter R_k=BF(B^+->K^+\mu^+\mu^-)/BF(B^+->K^+e^+e^-)in the dilepton invariant mass squared region 1<q^2<6 GeV^2/c^4 using data collected by LHCb in 2011 and 2012 is presented. R_k is a probe of New Physics providing model-independent constraints on the Wilson Coefficients C_s and C_p complementary to those from the B(B_s->\mu^+\mu^-) measurement from LHCb in 2012....
Patrick Haworth Owen
(Imperial College Sci., Tech. & Med. (GB))
4/9/13, 9:33 AM
Parallel Track 4
Using the large heavy flavour cross section at the LHC, the Standard Model can be probed more precisely than ever before. Results comparing the rates of neutral and charged rare B decays using 1.0 fb-1 of luminosity collected at the LHCb detector are presented. This so-called "isospin asymmetry" is expected to very close to zero in the SM, however results show a significant deviation from this...
Sean Benson
(University of Edinburgh (GB))
4/9/13, 9:45 AM
Parallel Track 4
A first measurement of the time-dependent CP-violating asymmetry in hadronic
B_s → φφ decays is presented. In this decay channel, the CP -violating weak phase
arises due to CP violation in the interference between B_s − bar{B}_s mixing and the
b → s bar{s} s hadronic penguin decay amplitude. Using a sample of 1.0 fb^−1 of pp
collision data collected at a centre-of mass energy of sqrt{s}=7...
Andrew Stephen Chisholm
(University of Birmingham (GB))
4/9/13, 1:30 PM
Parallel Track 4
Many years on from the discovery of the J/psi, our theoretical understanding of quarkonium production at hadron experiments is still far from satisfactory. The large data samples gathered at the LHC during 2010-2012, in conjunction with recent advances in theory, represent a fantastic opportunity for the LHC experiments to contribute to the improvement of this situation. The P-wave quarkonium...
Stephen Ogilvy
(University of Glasgow (GB))
4/9/13, 1:42 PM
Parallel Track 4
An analysis to measure the ratios of the $\Lambda_{c}^{+} \to p^{+} h^{-} h^{+}$, {$h = K, \pi$} $\mathcal{BF}s$ using 2011 LHCb data is presented. Two sources of $\Lambda_{c}^{+}$ are used, those produced promptly and those produced in semileptonic $\Lambda_{b}^{0} \to \Lambda_{c}^{+} \mu^{-} \bar{\nu}$ decays. The analysis includes a search for the hitherto unobserved...
Josh McFayden
(University of Sheffield (GB))
4/9/13, 1:54 PM
Parallel Track 4
Searches for supersymmetric 3rd generation squarks at the LHC are well motivated by naturalness arguments. The exclusion of TeV scale first and generation squarks and gluinos by previous LHC searches makes these searches particularly interesting.
I will present the current status of the top squark searches in ATLAS including the most recent results with 8 TeV data. The focus will be on the...
Tom Williams
(University of Bristol (GB))
4/9/13, 2:06 PM
Parallel Track 4
Through the analysis of data from 7 & 8 TeV centre-of-mass energy pp collisions at the Large Hadron Collider (LHC) in CERN, the LHC experiments have been expanding the frontiers of particle physics into the TeV energy regime. In addition to the discovery of a Higgs-like boson last year, there are many searches for Beyond the Standard Model (BSM) theories at the Compact Muon Solenoid (CMS)...
Benjamin Still
4/9/13, 2:18 PM
Parallel Track 4
The T2K neutrino beam is created at J-PARC in the East of Japan and is aimed at Super Kamiokande (Super-K) 2.5° off-axis and 295km to the West. Super-K is a 50kT water Cherenkov detector upgraded in 2006 for use by the T2K experiment as a far detector. In this talk we present the status, data taking efficiency, and candidate events selection for both appearance and disappearance analyses. We...
Jonathan Davies
(UCL)
4/9/13, 2:30 PM
Parallel Track 4
Ultra-high energy neutrinos from sources outside our solar system provide an opportunity to study particle physics at energies unobtainable at terrestrial accelerators. This weakly interacting messenger can be used to probe the high energy Universe alongside the astro-physical objects and mechanisms that produce them.
The Askaryan Radio Array (ARA) is a new teraton-scale ultra-high energy...
Matthew Mottram
(University of Sussex)
4/9/13, 2:42 PM
Parallel Track 4
SNO+ is a multipurpose neutrino experiment located 2km underground in Sudbury, Canada, which will begin operation this year. The detector consists of 8 kilotonnes of ultra-pure water shielding, with an array of ~9500 PMTs, surrounding a central O(1 kTonne) interaction volume. SNO+ will operate in three distinct phases, with a different material in the interaction volume during each phase:...
Thomas Dealtry
(RAL & University of Oxford)
4/9/13, 2:54 PM
Parallel Track 4
T2K is an off-axis long-baseline neutrino experiment, using the J-PARC muon-neutrino beam to look for muon-neutrino disappearance (to measure $\theta_{23}$ and $\Delta m^2_{32}$) and electron-neutrino appearance (to measure $\theta_{13}$). Super-Kamiokande, a 22.5 kton fiducial water Cerenkov detector located 295 km from the neutrino source, is used as the far detector. I report the result of...
Ms
Xiaohe Zhang
(University of Oxford)
4/9/13, 3:06 PM
Parallel Track 4
The EURECA (European Underground Rare Event Calorimeter Array) collaboration aims to construct and operate a cryogenic tonne-scale dark matter detector. The chosen technology is low-temperature calorimeters that combine the detection of a heat signal for precise energy measurement with either ionization or scintillation for efficient event type identification. The aim is to probe WIMP-nucleon...
Mr
Clive Tomlinson
(Sheffield University)
4/10/13, 8:45 AM
Parallel Track 4
General Relativity predicts that astrophysical systems or events with high mass-energy flux emit gravitational waves, a time varying curvature of space-time which carry energy, and propagate at the speed of light. The spatial strain induced by a passing gravitational wave (GW) is exceedingly small (~10-21), making their detection amidst instrumental noise a highly technical challenge. To...
Cristovao Vilela
(University College London)
4/10/13, 8:57 AM
Parallel Track 4
SuperNEMO is a low background experiment with the aim of observing neutrinoless double beta decay, an extremely rare nuclear decay which is the only known method for determining whether neutrinos are Majorana or Dirac particles. The detector comprises tracker and calorimeter submodules, the former currently being built in the UK. This talk will focus on the effort towards the development of...
Mr
Dean Forshaw
(University of Liverpool)
4/10/13, 9:09 AM
Parallel Track 4
To extend the physics reach of the LHC, upgrades to the accelerator are planned which will increase the peak luminosity by a factor of 5 to 10. This will increase the occupancy and the radiation damage of the inner trackers.To cope with the elevated occupancy, the ATLAS experiment plans to introduce an all-silicon inner tracker with the High Luminosity-LHC (HL-LHC) phase-II upgrade. This...
Henrique Araujo
(Imperial College London)
4/10/13, 9:21 AM
Parallel Track 4
We present the status of two WIMP search projects based on two-phase xenon emission detectors: the Large Underground Xenon (LUX) experiment, presently in the final stages of commissioning at the Sanford Underground Laboratory, and the LZ (LUX-ZEPLIN) project, a next-generation experiment featuring a 7-tonne xenon target being developed by US, UK and Portuguese teams. The LUX detector contains...
Adrian Bevan
(University of London (GB))
4/10/13, 9:33 AM
Parallel Track 4
The laws of quantum physics can be studied under
the mathematical T operation that inverts the direction of time.
Strong and electromagnetic forces are known to be invariant under temporal inversion, however the weak force is
not. The BaBar experiment recently exploited the quantum-correlated production
of neutral B mesons to show that T is a broken symmetry. Here
we show that it is...
