118360847
PLASTEX: A Tracking Experiment at the Centre of the GREX Scintillator Array
14219403
The new South Pole air shower experiment – SPASE-2
This paper describes a new coincidence experiment designed to improve understanding of the composition of the primary cosmic-ray beam around the knee of the spectrum. The experiment consists of an air shower array on the surface (SPASE-2), which works in coincidence with an array of air-Cherenkov detectors (VULCAN), and the Antarctic Muon and Neutrino Detector Array (AMANDA) deep in the ice. The experiment must cover the energy range from ∼1014 to ∼3×1016 eV to overlap with direct measurements at lower energy and encompass the regions of the knee and beyond in the cosmic ray spectrum.
127546936
A low cost 100 KM**2 air shower detector
124991249
Particle astrophysics in antarctica
9798249
A polarimetric study of the B[e] star HD 45677
We present new medium-resolution spectropolarimetric observations of HD 45677 in the B and R bands. A change in polarization is detected across Hα, Hβ and Hγ confirming that the ionized region around the star is aspherical. (Q, U) points associated with these emission lines occur away from the continuum, defining a polarization vector which points in the same direction for each of the lines at an average intrinsic polarization angle of 164°± 3°. 
 
 
 
These data were combined with past photometric and polarimetric data from the literature to investigate any variability. We find that HD 45677 is both photometrically and polarimetrically variable and that these changes are linked. We suggest that these variations may be caused by an aspherical blowout, and by deriving a least-squares fit to the B-band polarimetric data in the Q–U space, we show that the blowout occurs at an intrinsic polarization angle of 175°± 1°, along the same angle as the proposed geometry of the ionized region.
173160312
Modifications and Improvements to the GREX Array at Haverah Park
118055934
Summary of the CKM 2010 Working Group on Rare Decays
Rare decays were essential in the discovery of the CKM mechanism of flavour and CP violation and are highly sensitive probes of physics beyond the Standard Model. In this summary the current status and future prospects of experimental measurements and the Standard Model theory predictions of various rare B, D and K decay observables are discussed. The specific new physics sensitivities of each mode are also briefly reviewed.
121744643
Characterisation and compensation of magnetic distortions for the pixel Hybrid Photon Detectors of the LHCb RICH
Abstract The LHCb experiment at LHC, optimised for the study of CP violation, has two RICH detectors to provide particle identification in the momentum range ∼ 2 – 100 GeV / c . The stringent requirements on the photon detectors are met by the custom-made pixel Hybrid Photon Detector. The photon detectors need to operate in the fringe field of the LHCb dipole magnet which will produce distortions of the image detected on the pixel chip which is encapsulated inside the HPD. This paper reports on the experimental characterisation of the image distortions caused by an external magnetic flux density. These measurements allow for the development of a parameterisation of the effects and a compensation algorithm, which are also presented.
17738150
Primordial black holes, phase transitions, and the fate of the universe
Phase transitions in the early universe are prime settings for the production of primordial black holes, since they can break the relatively quiescent homogeneity and isotropy of Friedmann-Robertson-Walker (FRW) cosmologies. These epochs of "symmetry breaking," moreover, can affect the subsequent development of spacetime by changing the evolution of some FRW parameters, including the present age and density of the universe. We discuss the relative importance of such effects on constraining mechanisms of black hole formation.
17884247
Performance of the LHCb RICH detector at the LHC
The LHCb experiment has been taking data at the Large Hadron Collider (LHC) at CERN since the end of 2009. One of its key detector components is the Ring-Imaging Cherenkov (RICH) system. This provides charged particle identification over a wide momentum range, from 2–100 GeV/c. The operation and control, software, and online monitoring of the RICH system are described. The particle identification performance is presented, as measured using data from the LHC. Excellent separation of hadronic particle types (π, K, p) is achieved.
13621763
What are sterile neutrinos good for
Taken at face value, current experimental data indicate the existence of a new particle, the sterile neutrino, which must be a singlet under the Standard Model gauge group. Although they are not detectable through traditional means, such particles have interesting observable consequences for particle astrophysics and cosmology. Here we examine these implications and discuss, in particular, sterile neutrino dark matter and the relationship between matter-enhanced active-sterile neutrino transformation and the synthesis of heavy elements in supernovae.