The Experts below are selected from a list of 131139 Experts worldwide ranked by ideXlab platform
Edward W Hook - One of the best experts on this subject based on the ideXlab platform.
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association of biologic false positive reactions for syphilis with human immunodeficiency virus infection
The Journal of Infectious Diseases, 1992Co-Authors: Anne Rompalo, Thomas C. Quinn, Robert O Cannon, Edward W HookAbstract:The prevalence of biologic false-positive (BFP) reactions for syphilis (reactive rapid plasma reagin [RPR] test, nonreactive fluorescent treponemal antibody absorption [FTA-ABS] test) among patients attending two sexually transmitted disease (STD) clinics was evaluated to assess relationships between BFP reactions and human immunodeficiency virus (HIV) infection. Among 4863 patients, 357 (7.3%) had serologic evidence of syphilis and 4.9% had HIV infection. Only 40 patients (0.8% of total patients, 11% of those with reactive RPR tests) had BFP serologic tests for syphilis. There were no demographic differences between true syphilis and BFP patients as to sex, age, or intravenous drug use. BFP patients tended to have lower RPR titers (less than or equal to 1:4) than did true syphilis patients. After excluding 317 patients with reactive FTA-ABS tests, BFP RPR tests were seen in 6 (4%) of 159 HIV-seropositive patients and 34 (0.8%) of 4387 HIV-seronegative patients (odds ratio, 5.0; 95% confidence interval, 1.9-12.7). Although more common among HIV-infected than HIV-uninfected patients, BFP reactions are relatively rare among STD clinic patients, and 89% of patients with reactive RPR or VDRL serologic tests for syphilis had current or prior syphilis infection. The RPR test remains useful for guiding decisions regarding therapy for syphilis.
C Fabjan - One of the best experts on this subject based on the ideXlab platform.
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measurement of pseudorapidity distributions of charged particles in proton proton collisions at sqrt s 8 tev by the cms and totem experiments
European Physical Journal C, 2014Co-Authors: S Chatrchyan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, V Khachatryan, W Adam, M Dragicevic, J Ero, C Fabjan, M FriedlAbstract:Pseudorapidity (eta) distributions of charged particles produced in proton-proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges abs(eta) < 2.2 and 5.3 < abs(eta) < 6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of 45 inverse microbarns. Measurements are presented for three event categories. The most inclusive category is sensitive to 91-96% of the total inelastic proton-proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions.
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measurement of the triple differential cross section for photon jets production in proton proton collisions at s 7 tev
Journal of High Energy Physics, 2014Co-Authors: S Chatrchyan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, V Khachatryan, W Adam, M Dragicevic, J Ero, C FabjanAbstract:A measurement of the triple-differential cross section (sigma as a function of the photon pt and eta and the jet eta) in photon+jets final states using a data sample from proton-proton collisions at sqrt(s)=7 TeV is presented. This sample corresponds to an integrated luminosity of 2.14 inverse femtobarns collected by the CMS detector at the LHC. Photons and jets are reconstructed within a pseudorapidity range of abs(eta) 30 GeV, respectively. The measurements are compared to theoretical predictions from the SHERPA leading-order QCD Monte Carlo event generator and the next-to-leading-order perturbative QCD calculation from JETPHOX. The predictions are found to be consistent with the data over most of the examined kinematic region.
Anne Rompalo - One of the best experts on this subject based on the ideXlab platform.
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Syphilis Serology in Human Immunodeficiency Virus Infection: Evidence for False-Negative Fluorescent Treponemal Testing
The Journal of Infectious Diseases, 1997Co-Authors: Emily J Erbelding, Pablo J. Sánchez, Wayne Brathwaite, Kenrad Edwin Nelson, Sylvia Cohn, Anne Rompalo, Thomas C. Quinn, David Vlahov, David L ThomasAbstract:: Injection drug users were assessed serologically for human immunodeficiency virus infection and syphilis every 6 months. Treatment histories were reviewed for any high-titer biologic false-positive (BFP) reactors, that is, persons with rapid plasma reagin (RPR) titers > or = 1:4 and negative results for fluorescent treponemal antibody absorption (FTA-ABS) tests. Selected sera were analyzed further by immunoblotting for the presence of antibodies reactive with specific Treponema pallidum antigens. Of 112 BFP reactors, 35 (31%) had at least one RPR test reactive at a dilution >1:8 while the FTA-ABS test remained nonreactive. Five reactors (4.5%) converted from nonreactive to reactive by FTA-ABS test; 4 (3.6%) were reactive by FTA-ABS tests but later became nonreactive. Antibodies to T. pallidum membrane antigens were detected in some samples that were persistently nonreactive by FTA-ABS test. Serologic patterns over time, along with very high-titer BFP reactions and reactivity with T. pallidum-specific antigens, suggest that some BFP reactions may represent FTA-negative syphilis.
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association of biologic false positive reactions for syphilis with human immunodeficiency virus infection
The Journal of Infectious Diseases, 1992Co-Authors: Anne Rompalo, Thomas C. Quinn, Robert O Cannon, Edward W HookAbstract:The prevalence of biologic false-positive (BFP) reactions for syphilis (reactive rapid plasma reagin [RPR] test, nonreactive fluorescent treponemal antibody absorption [FTA-ABS] test) among patients attending two sexually transmitted disease (STD) clinics was evaluated to assess relationships between BFP reactions and human immunodeficiency virus (HIV) infection. Among 4863 patients, 357 (7.3%) had serologic evidence of syphilis and 4.9% had HIV infection. Only 40 patients (0.8% of total patients, 11% of those with reactive RPR tests) had BFP serologic tests for syphilis. There were no demographic differences between true syphilis and BFP patients as to sex, age, or intravenous drug use. BFP patients tended to have lower RPR titers (less than or equal to 1:4) than did true syphilis patients. After excluding 317 patients with reactive FTA-ABS tests, BFP RPR tests were seen in 6 (4%) of 159 HIV-seropositive patients and 34 (0.8%) of 4387 HIV-seronegative patients (odds ratio, 5.0; 95% confidence interval, 1.9-12.7). Although more common among HIV-infected than HIV-uninfected patients, BFP reactions are relatively rare among STD clinic patients, and 89% of patients with reactive RPR or VDRL serologic tests for syphilis had current or prior syphilis infection. The RPR test remains useful for guiding decisions regarding therapy for syphilis.
Armen Tumasyan - One of the best experts on this subject based on the ideXlab platform.
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pseudorapidity distribution of charged hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: Vardan Khachatryan, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Ece Asilar, Waldemar Adam, Erica Brondolin, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
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pseudorapidity distribution of charged hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Ece Asilar, Waldemar Adam, Erica Brondolin, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
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measurement of pseudorapidity distributions of charged particles in proton proton collisions at sqrt s 8 tev by the cms and totem experiments
European Physical Journal C, 2014Co-Authors: S Chatrchyan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, V Khachatryan, W Adam, M Dragicevic, J Ero, C Fabjan, M FriedlAbstract:Pseudorapidity (eta) distributions of charged particles produced in proton-proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges abs(eta) < 2.2 and 5.3 < abs(eta) < 6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of 45 inverse microbarns. Measurements are presented for three event categories. The most inclusive category is sensitive to 91-96% of the total inelastic proton-proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions.
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measurement of the triple differential cross section for photon jets production in proton proton collisions at s 7 tev
Journal of High Energy Physics, 2014Co-Authors: S Chatrchyan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, V Khachatryan, W Adam, M Dragicevic, J Ero, C FabjanAbstract:A measurement of the triple-differential cross section (sigma as a function of the photon pt and eta and the jet eta) in photon+jets final states using a data sample from proton-proton collisions at sqrt(s)=7 TeV is presented. This sample corresponds to an integrated luminosity of 2.14 inverse femtobarns collected by the CMS detector at the LHC. Photons and jets are reconstructed within a pseudorapidity range of abs(eta) 30 GeV, respectively. The measurements are compared to theoretical predictions from the SHERPA leading-order QCD Monte Carlo event generator and the next-to-leading-order perturbative QCD calculation from JETPHOX. The predictions are found to be consistent with the data over most of the examined kinematic region.
Albert M Sirunyan - One of the best experts on this subject based on the ideXlab platform.
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pseudorapidity distribution of charged hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: Vardan Khachatryan, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Ece Asilar, Waldemar Adam, Erica Brondolin, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
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pseudorapidity distribution of charged hadrons in proton proton collisions at s 13 tev
Physics Letters B, 2015Co-Authors: V Khachatryan, Jürgen Brandstetter, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, Ece Asilar, Waldemar Adam, Erica Brondolin, Marko Dragicevic, Martin FlechlAbstract:The pseudorapidity distribution of charged hadrons in pp collisions at sqrt(s) =13 TeV is measured using a data sample obtained with the CMS detector, operated at zero magnetic field, at the CERN LHC. The yield of primary charged long-lived hadrons produced in inelastic pp collisions is determined in the central region of the CMS pixel detector (abs(eta)<2) using both hit pairs and reconstructed tracks. For central pseudorapidities (abs(eta)<0.5), the charged-hadron multiplicity density is dN/d(eta)[charged,abs(eta) < 0.5] = 5.49 +/- 0.01 (stat) +/- 0.17 (sys), a value obtained by combining the two methods. The result is compared to predictions from Monte Carlo event generators and to similar measurements made at lower collision energies.
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measurement of pseudorapidity distributions of charged particles in proton proton collisions at sqrt s 8 tev by the cms and totem experiments
European Physical Journal C, 2014Co-Authors: S Chatrchyan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, V Khachatryan, W Adam, M Dragicevic, J Ero, C Fabjan, M FriedlAbstract:Pseudorapidity (eta) distributions of charged particles produced in proton-proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges abs(eta) < 2.2 and 5.3 < abs(eta) < 6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of 45 inverse microbarns. Measurements are presented for three event categories. The most inclusive category is sensitive to 91-96% of the total inelastic proton-proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions.
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measurement of the triple differential cross section for photon jets production in proton proton collisions at s 7 tev
Journal of High Energy Physics, 2014Co-Authors: S Chatrchyan, Tobias Bergauer, Albert M Sirunyan, Armen Tumasyan, V Khachatryan, W Adam, M Dragicevic, J Ero, C FabjanAbstract:A measurement of the triple-differential cross section (sigma as a function of the photon pt and eta and the jet eta) in photon+jets final states using a data sample from proton-proton collisions at sqrt(s)=7 TeV is presented. This sample corresponds to an integrated luminosity of 2.14 inverse femtobarns collected by the CMS detector at the LHC. Photons and jets are reconstructed within a pseudorapidity range of abs(eta) 30 GeV, respectively. The measurements are compared to theoretical predictions from the SHERPA leading-order QCD Monte Carlo event generator and the next-to-leading-order perturbative QCD calculation from JETPHOX. The predictions are found to be consistent with the data over most of the examined kinematic region.
