At present, there are two Micromegas detector production sites at the Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear Research (DLNP JINR). The first site provides the ...production and testing of Micromegas chambers for the outer part of the large sectors (LM2) of the New Small Wheels for the ATLAS Muon spectrometer. It will produce and test 64 double-sided readout panels with a surface area of 3 m
2
each and 32 Micromegas chambers based on them. Component materials for all project participants are centrally delivered from CERN. The second site is for a complete production cycle and intended for the research and development of Micromegas detectors with widths reaching 60 cm.
Performance of multigap RPC detectors in the HARP experiment Barr, G.; Dedovich, D.; Min, A. De ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
11/2004, Volume:
533, Issue:
1-2
Journal Article
Peer reviewed
A time-of-flight system based on 46 multigap glass resistive plate chambers has operated for 2 years in the HARP experiment at the CERN PS. The system covers an area of 10m2 and comprises 368 readout ...channels. Systematic checks of the RPC performance are presented as well as preliminary results on its particle identification capabilities.
The HARP RPC time-of-flight system Bogomilov, M; Dedovich, D; Dumps, R ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
08/2003, Volume:
508, Issue:
1-2
Journal Article
This paper describes an iterative method of per-pixel energy calibration of hybrid pixel detectors with GaAs:Cr sensor and Timepix readout chip. A convolution of precisely measured spectra of ...characteristic X-rays of different metals with the resolution and the efficiency of the pixel detector is used for the calibration. The energy resolution of the detector is also measured during the calibration. The use of per-pixel calibration allows to achieve a good energy resolution of the Timepix detector with GaAs:Cr sensor: 8 and 13% at 60 and 20 keV, respectively.
This paper presents results on the measurement of tau-lepton hadronic decays branching ratios in DELPHI experiments at LEP. It includes the final results on exclusive hadronic branchings (without
π
/
...K
separation) and preliminary results on single-prong tau-lepton decays to kaons.
We study D0Dmacr0 pairs produced in e super(+)e super(-)e+e- collisions at s=3.773 GeV using a data sample of 2.92 fb super(-1) collected with the BESIII detector. We measured the asymmetry AK pi CP ...of the branching fractions of D arrow right K super(-) pi super(+)D arrow right K- pi + in CP -odd and CP -even eigenstates to be (12.7 plus or minus 1.3 plus or minus 0.7)10 super(-2)(12.7 plus or minus 1.3 plus or minus 0.7)10-2. AK pi CP can be used to extract the strong phase difference delta sub(K pi ) delta K pi between the doubly Cabibbo-suppressed process Dmacr0 arrow right K- pi + and the Cabibbo-favored process D super(0) arrow right K super(-) pi super(+)D0 arrow right K- pi +. Using world-average values of external parameters, we obtain cos delta K pi =1.02 plus or minus 0.11 plus or minus 0.06 plus or minus 0.01. Here, the first and second uncertainties are statistical and systematic, respectively, while the third uncertainty arises from the external parameters. This is the most precise measurement of delta sub(K pi ) delta K pi to date.
An analysis is presented of events containing jets including at least one b-tagged jet, sizeable missing transverse momentum, and at least two leptons including a pair of the same electric charge, ...with the scalar sum of the jet and lepton transverse momenta being large. A data sample with an integrated luminosity of 20.3 fb(-1) of pp collisions at root s = 8 TeV recorded by the ATLAS detector at the Large Hadron Collider is used. Standard Model processes rarely produce these final states, but there are several models of physics beyond the Standard Model that predict an enhanced rate of production of such events; the ones considered here are production of vector-like quarks, enhanced fourtop-quark production, pair production of chiral b '-quarks, and production of two positively charged top quarks. Eleven signal regions are defined; subsets of these regions are combined when searching for each class of models. In the three signal regions primarily sensitive to positively charged top quark pair production, the data yield is consistent with the background expectation. There are more data events than expected from background in the set of eight signal regions defined for searching for vector-like quarks and chiral b ' quarks, but the significance of the discrepancy is less than two standard deviations. The discrepancy reaches 2.5 standard deviations in the set of five signal regions defined for searching for four-top-quark production. The results are used to set 95% CL limits on various models.
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