The Silicon Vertex Detector of the Collider Detector at Fermilab

Amidei, D.; Azzi, P.; Bacchetta, N.; Bailey, M. W.; Barnett, B. A.; Bedeschi, F.; Bisello, D.; Bolognesi, V.; Boswell, C.; Busetto, G.; Carithers, W.; Carter, H.; Castro, A.; Dell’Agnello, S.; Derwent, P. F.; Ducar, R.; Dunn, A.; Ely, R.; Flaugher, B.; Galeotti, S.; Barbaro-Galtieri, A.; Garfinkel, A. F.; Haber, C.; Holland, S.; Hrycyk, M.; Herrup, D.; Hughes, R.; Kleinfelder, S.; Loreti, M.; Mariotti, M.; Matthews, J.; Menzione, A.; Merrick, T.; Nelson, Charles A.; Pescara, L.; Produit, N.; Punzi, G.; Raffaelli, F.; Ristori, L.; Schneider, O.; Segler, S.; Shapiro, M.; Shaw, N. M.; Shaw, T.; Skarha, J.; Snider, F. D.; Song, T.; Spies, A.; Tipton, P.; Tkaczyk, S.; Tartarelli, G. F.; Tseng, J.; Turini, N.; Turner, K.; Vejcik, S.; Watts, G.; Wesson, T.R.; Wester, W. C.; Wenzel, H.; Wong, M.; Yao, Wei-Ming; Zetti, F.

doi:10.1016/0168-9002(94)91156-8

Cited by 157 publications

(24 citation statements)

References 17 publications

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“…The CDF detector is described in detail elsewhere [1], [4], [5]. For this run, the tracking system was upgraded with a high precision silicon vertex detector (SVX) [5]), and the muon detector was improved at pseudorapidity [6] |η|<0.6 by adding an absorber of 0.6 m of steel followed by drift chambers. In addition, the coverage of the central muon detector was extended to the region of pseudorapidity 0.6 < |η| < 1.0 (over about 2/3 of the azimuth) with drift chambers and scintillation counters.…”

Section: Data Selectionmentioning

confidence: 99%

Kinematic evidence for top quark pair production inW+multijet events inpp¯collisions at √s=1.8 TeV

Abe¹,

Albrow²,

Amendolia³

et al. 1995

Phys. Rev. D

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We present a study of W +multijet events that compares the kinematics of the observed events with expectations from direct QCD W +jet production and from production and decay of top quark pairs. The data were collected in the 1992-93 run with the Collider Detector at Fermilab (CDF) from 19.3 pb −1 of proton-antiproton collisions at √ s = 1.8 TeV. A W + ≥ 2 jet sample and a W + ≥ 3 jet sample are selected with the requirement that at least the two or three jets have energy transverse with respect to the beam axis in excess of 20 GeV. The jet energy distributions for the W + ≥ 2 jet sample agree well with the predictions of direct QCD W production. From the W + ≥ 3 jet events, a "signal sample" with an improved ratio of tt to QCD produced W events is selected by requiring each jet to be emitted centrally in the event center of mass frame.This sample contains 14 events with unusually hard jet E T distributions not well described by expectations for jets from direct QCD W production and other background processes. Using expected jet E T distributions, a relative likelihood is defined and used to determine if an event is more consistent with the decay of tt pairs, with M top = 170GeV/c 2 , than with direct QCD W production. Eight of the 14 signal sample events are found to be more consistent with top than direct QCD W production, while only 1.7 such top-like events are expected in the absence of tt. The probability that the observation is due to an upward fluctuation of the number of background events is found to be 0.8%. The robustness of the result was tested by varying the cuts defining the signal sample, and the largest probability for such a fluctuation found was 1.9% . Good agreement in the jet spectra is obtained if jet production from tt pair decays is included.For those events kinematically more consistent with tt we find evidence for a b-quark content in their jets to the extent expected from top decay, and larger than expected for background processes. For events with four or more jets, the discrepancy with the predicted jet energy distributions from direct QCD W production, and the associated excess of b-quark content is more pronounced.

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Section: Data Selectionmentioning

confidence: 99%

Kinematic evidence for top quark pair production inW+multijet events inpp¯collisions at √s=1.8 TeV

Abe¹,

Albrow²,

Amendolia³

et al. 1995

Phys. Rev. D

Self Cite

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“…On the other side, a detector so close to the interaction region is required to sustain large doses of radiation. Both these criteria are satisfied by silicon micro-strip detectors pioneered in a hadron collider environment by CDF [25]. Finely spaced strips of strongly doped p-type (p + ) silicon are implanted on a lightly doped n-type (n − ) silicon substrate (≈ 300 μm thick).…”

Section: Vertexingmentioning

confidence: 99%

Study of B<sub>s</sub> mixing at the CDFII experiment with a newly developed opposite side b-flavour tagging algorithm using kaons

Salamanna¹

2006

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“…The magnetic field and three tracking devices are all arranged with their principal axis parallel to the proton beam direction (zaxis) [21]. The tracking device closest to the beam line is a four-layer silicon micro-strip vertex detector (SVX), used to find secondary vertices, with layers at radii from 2.8 cm to 7.9 cm [22]. Surrounding the SVX is a set of time projection chambers (VTX) which identifies the pp interaction point(s) along the beam axis with a series of r − z measurements out to a radius of 22 cm.…”

Section: The Cdf Detectormentioning

confidence: 99%

Search for narrow diphoton resonances and forγγ+W/Zsignatures inpp¯collisions at<

Affolder¹,

Akimoto²,

Akopian³

et al. 2001

Phys. Rev. D

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We present results of searches for diphoton resonances produced both inclusively and also in association with a vector boson (W or Z) using 100 pb −1 of pp collisions using the CDF detector. We set upper limits on the product of cross section times branching ratio for both pp → γγ +X and pp → γγ +W/Z. Comparing the inclusive production to the expectations from heavy sgoldstinos we derive limits on the supersymmetry-breaking scale √ F in the TeV range, depending on the sgoldstino mass and the choice of other parameters. Also, using a NLO prediction for the associated production of a Higgs boson with a W or Z boson, we set an upper limit on the branching ratio for H → γγ. Finally, we set a lower limit on the mass of a 'bosophilic' Higgs boson (e.g. one which couples only to γ, W , and Z bosons with standard model couplings) of 82 GeV/c 2 at 95% confidence level. PACS number(s): 13.85

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The Silicon Vertex Detector of the Collider Detector at Fermilab

Cited by 157 publications

References 17 publications

Kinematic evidence for top quark pair production inW+multijet events inpp¯collisions at √s=1.8 TeV

Kinematic evidence for top quark pair production inW+multijet events inpp¯collisions at √s=1.8 TeV

Study of B<sub>s</sub> mixing at the CDFII experiment with a newly developed opposite side b-flavour tagging algorithm using kaons

Search for narrow diphoton resonances and forγγ+W/Zsignatures inpp¯collisions at<

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