The challenge of providing a resilient and scalable computational and data management solution for massive scale research environments requires continuous exploration of new technologies and ...techniques. In this project the aim has been to design a scalable and resilient infrastructure for CERN HEP data analysis. The infrastructure is based on OpenStack components for structuring a private Cloud with the Gluster File System. We integrate the state-of-the-art Cloud technologies with the traditional Grid middleware infrastructure. Our test results show that the adopted approach provides a scalable and resilient solution for managing resources without compromising on performance and high availability.
An OpenStack based private cloud with the Cluster File System has been built and used with both CMS analysis and Monte Carlo simulation jobs in the Datacenter Indirection Infrastructure for Secure ...High Energy Physics (DII-HEP) project. On the cloud we run the ARC middleware that allows running CMS applications without changes on the job submission side. Our test results indicate that the adopted approach provides a scalable and resilient solution for managing resources without compromising on performance and high availability. To manage the virtual machines (VM) dynamically in an elastic fasion, we are testing the EMI authorization service (Argus) and the Execution Environment Service (Argus-EES). An OpenStackplugin has been developed for Argus-EES. The Host Identity Protocol (HIP) has been designed for mobile networks and it provides a secure method for IP multihoming. HIP separates the end-point identifier and locator role for IP address which increases the network availability for the applications. Our solution leverages HIP for traffic management. This presentation gives an update on the status of the work and our lessons learned in creating an OpenStackbased cloud for HEP.
Review of Particle Physics Tanabashi, M.; Nakamura, K.; Tanaka, J. ...
Physical review. D,
08/2018, Letnik:
98, Številka:
3
Journal Article
Recenzirano
Odprti dostop
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 2,873 new measurements from 758 papers, we list, evaluate, and average measured properties of ...gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 118 reviews are many that are new or heavily revised, including a new review on Neutrinos in Cosmology.
We show that the characteristic
p
⊥ spectrum yields valuable information for the test of models for the production of narrow graviton resonances in the TeV range at LHC. Furthermore, it is ...demonstrated that in those scenarios the parton showering formalism agrees with the prediction of NLO matrix element calculations.
B-physics potential of ATLAS: an update Eerola, P.
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
12/1996, Letnik:
384, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The B-physics potential of the ATLAS experiment at LHC is described. Simulation results are shown for the measurement of sin 2β, with an emphasis on new tagging techniques. Other CP-violation ...measurements are described briefly. New limits are shown for the reach of the
x
s-measurement, resulting from increased statistics and improved fitting methods. Some rare decay modes of B-mesons can be easily seen in ATLAS. Analyses of channels B →
μ
+
μ
− (X) are presented here.
We have written a Fortran program BCVEGPY, which is an event generator for the hadronic production of the B-c meson through the dominant hard subprocess gg --> B-c(B-c(*)) + b + c. To achieve a ...compact program, we have written the amplitude of the subprocess with the particle helicity technique and made it as symmetric as possible, by decomposing the gluon self couplings and then applying the symmetries. To check the program, various cross sections of the subprocess have been computed numerically and compared with those in the literature. BCVEGPY is written in a PYTHIA-compatible format, thus it is easy to implement in PYTHIA.
All-solid-state chloride sensors based on poly(3-octylthiophene) (POT) as ion-to-electron transducer were studied by electrochemical impedance spectroscopy (EIS) and potentiometric measurements. POT ...was deposited by solution casting on a glassy carbon (GC) substrate and then coated with a layer of plasticized PVC, containing tridodecylmethylammonium chloride (TDMACl) as the ion-exchanger. Highly reproducible and stable chloride sensors were fabricated with the concentration of TDMACl in the PVC membrane varying in the range of 5–15% (w/w). The presence of TDMACl also in the POT layer was found to significantly decrease the electrode impedance but did not influence the potentiometric response of the chloride sensors studied. Conditioning of the POT layer in AgNO
3, prior to casting of the PVC membrane, slightly improved the potential stability of the electrode (due to the presence of silver in POT) but did not lower the detection limit. The response of the GC/POT/PVC–TDMACl electrode was comparable to that of GC/PEDOT/PVC–TDMACl electrode studied earlier. However, the GC/POT/PVC–TDMACl electrodes are easier to prepare, as the electropolymerization step of PEDOT solid-contact can be avoided. The absence of water (layers) between the solid-contact and the PVC–TDMACl membranes was verified by performing the so-called “water-layer test”.
All-solid-state chloride sensors based on different types of polymeric membranes on a glassy carbon (GC) substrate were studied. Poly(3,4-ethylenedioxythiophene) (PEDOT) doped with chloride was ...electrodeposited on the GC substrate, resulting in a GC/PEDOT sensor where PEDOT worked both as ion-to-electron transducer and sensing membrane. A classical solid-contact electrode was prepared by coating PEDOT with a layer of plasticized poly(vinyl chloride) (PVC) containing tridodecylmethylammonium chloride (TDMACl) as ion-exchanger. A non-classical solid-contact electrode was prepared by coating PEDOT with a layer of electronically semiconducting poly(3-octylthiophene) (POT) containing TDMACl as ion-exchanger as well. These GC/PEDOT, GC/PEDOT/PVC-TDMACl and GC/PEDOT/POT-TDMACl electrodes were compared with a GC/POT-TDMACl electrode. These combinations of polymeric membrane materials with different electronic and ionic conductivities were studied by electrochemical impedance spectroscopy (EIS) and potentiometric measurements. The results show that PEDOT offers highly reversible ion-to-electron transduction and the GC/PEDOT/PVC-TDMACl electrode gives the lowest hysteresis in the calibration plot among the electrodes studied. Interestingly, GC/POT-TDMACl gives a significantly lower detection limit than the other electrodes studied in this work. Furthermore, GC/POT-TDMACl shows a diffusion-controlled ion-to-electron transduction mechanism, which is clearly different from that of GC/PEDOT-based electrodes.
PDF
