V. V. Tokmenin

Spatial resolution of profile-based detectors with external pick-up strips

Abstract We studied profile-based detectors with external pick-up strips (Iarocci-type tubes) with the purpose to find out if they can be used as detectors of large area and high spatial resolution. In this paper we summarize our measurements and calculations. Contributions of different factors in the spatial resolution were theoretically evaluated. The resolution of ∼ 45 μm in the proportional mode and ∼ 100 μm in the limited streamer mode were obtained in a laser beam. The former was limited by electronic noise and the latter by the intrinsic streamer fluctuations. The resolution of ∼ 80 μm in proportional mode was achieved in a muon beam (by subtracting the electronic noise contribution, we estimate that the limit for our prototype was around 60–65 μm).

The results of mass testing of the plastic streamer tubes for the DELPHI hadron calorimeter

Abstract The procedure and results of mass testing of plastic streamer tubes for the DELPHI hadron calorimeter are described in detail. The mass testing includes three stages: high voltage test and conditioning, X-ray test on radiation load capability and wire tension control in ready detectors. The productivity of the test workshop was 240 detectors per day at maximum. After testing of about 25 000 streamer tubes, 8% have been rejected on the ground of severe rejection criteria which exceed significantly the working conditions in the DELPHI experiment.

Measurement of the ratio of inclusive cross sections {sigma}(pp{yields}Z+b-quark jet)/{sigma}(pp{yields}Z+jet) at {radical}(s)=1.96 TeV

The ratio of the cross section for pp interactions producing a Z boson and at least one b-quark jet to the inclusive Z+jet cross section is measured using 4.2 fb{sup -1} of pp collisions collected with the D0 detector at the Fermilab Tevatron collider at {radical}(s)=1.96 TeV. The Z{yields}l{sup +}l{sup -} candidate events with at least one b jet are discriminated from Z+charm and light jet(s) events by a novel technique that exploits the properties of the tracks associated to the jet. The measured ratio is 0.0193{+-}0.0027 for events having a jet with transverse momentum p{sub T}>20 GeV and pseudorapidity |{eta}|{<=}2.5, which is the most precise to date and is consistent with theoretical predictions.The ratio of the cross section for

Measurement of tt production in the {tau}+jets topology using pp collisions at {radical}(s)=1.96 TeV

p\bar{p}

Double parton interactions in {gamma}+3 jet events in pp collisions at {radical}(s)=1.96 TeV

interactions producing a

Search for CP violation in B{sub s}{sup 0{yields}{mu}+}D{sub s}{sup -}X decays in pp collisions at {radical}(s)=1.96 TeV

Z

Evidence for the Decay B{sub s}{sup 0}{yields}D{sub s}{sup (*)}D{sub s}{sup (*)} and a Measurement of {delta}{gamma}{sub s}{sup CP}/{gamma}{sub s}

boson and at least one

Measurement of the Angular and Lifetime Parameters of the Decays B{sub d}{sup 0}{yields}J/{psi}K*{sup 0} and B{sub s}{sup 0}{yields}J/{psi}{phi}

b

Search for Pair Production of Doubly Charged Higgs Bosons in the H{sup ++}H{sup --}{yields}{mu}{sup +}{mu}{sup +}{mu}{sup -}{mu}{sup -} Final State

quark jet to the inclusive

Measurement of the Electron Charge Asymmetry in pp{yields}W+X{yields}e{nu}+X Events at {radical}(s)=1.96 TeV

Z+{\rm jet}