Search for large extra dimensions in the production of jets and missing transverse energy in pp̄ collisions at s=1.96TeV
Physical Review Letters 97:17 (2006)
Abstract:
We present the results of a search for new physics in the jets plus missing transverse energy data sample collected from 368pb-1 of pp̄ collisions at s=1.96TeV recorded by the Collider Detector at Fermilab. We compare the number of events observed in the data with a data-based estimate of the standard model backgrounds contributing to this signature. We observe no significant excess of events, and we interpret this null result in terms of lower limits on the fundamental Planck scale for a large extra dimensions scenario. © 2006 The American Physical Society.Search for large extra dimensions in the production of jets and missing transverse energy in pp collisions at square root of s = 1.96 TeV.
Phys Rev Lett 97:17 (2006) 171802
Abstract:
We present the results of a search for new physics in the jets plus missing transverse energy data sample collected from 368 pb(-1) of pp collisions at square root of s = 1.96 TeV recorded by the Collider Detector at Fermilab. We compare the number of events observed in the data with a data-based estimate of the standard model backgrounds contributing to this signature. We observe no significant excess of events, and we interpret this null result in terms of lower limits on the fundamental Planck scale for a large extra dimensions scenario.Measurement of the tt̄ production cross section in pp̄ collisions at s=1.96TeV using lepton+jets events with jet probability b-tagging
Physical Review D - Particles, Fields, Gravitation and Cosmology 74:7 (2006)
Abstract:
We present a measurement of the tt̄ production cross section using events with one charged lepton and jets from pp̄ collisions at a center-of-mass energy of 1.96 TeV. A b-tagging algorithm based on the probability of displaced tracks coming from the event interaction vertex is applied to identify b quarks from top decay. Using 318pb-1 of data collected with the CDF II detector, we measure the tt̄ production cross section in events with at least one restrictive (tight) b-tagged jet and obtain 8.9-1.0+1.0(stat)-1.0+1.1(syst)pb. The cross section value assumes a top quark mass of mt=178GeV/c2 in the acceptance corrections. The dependence of the cross section on mt is presented in the paper. This result is consistent with other CDF measurements of the tt̄ cross section using different samples and analysis techniques, and has similar systematic uncertainties. We have also performed consistency checks by using the b-tagging probability function to vary the signal-to-background ratio and also using events that have at least two b-tagged jets. © 2006 The American Physical Society.Measurement of the tt̄ production cross section in pp̄ collisions at s=1.96TeV in the all hadronic decay mode
Physical Review D - Particles, Fields, Gravitation and Cosmology 74:7 (2006)
Abstract:
We report a measurement of the tt̄ production cross section using the CDF II detector at the Fermilab Tevatron. The analysis is performed using 311pb-1 of pp̄ collisions at s=1.96TeV. The data consist of events selected with six or more hadronic jets with additional kinematic requirements. At least one of these jets must be identified as a b-quark jet by the reconstruction of a secondary vertex. The cross section is measured to be σtt̄=7. 5±2.1(stat.)-2.2+3.3(syst.)-0.4+0.5(lumi.)pb, which is consistent with the standard model prediction. © 2006 The American Physical Society.Measurement of the ratio of branching fractions B(D0→K+π-)/ B(D0→K-π+) using the CDF II detector
Physical Review D - Particles, Fields, Gravitation and Cosmology 74:3 (2006)