Publications (24)
Measurement of the differential cross section dÏ/dt in elastic scattering at sqrt(s)=1.96 TeV
D0 Collaboration, V. M. Abazov, B. Abbott +406
We present a measurement of the elastic differential cross section as a function of the four-momentum-transfer squared t. The data sample cor…
The D0 Run IIb Luminosity Measurement
B. C. K. Casey, M. Corcoran, K. DeVaughan +10
An assessment of the recorded integrated luminosity is presented for data collected with the D0 detector at the Fermilab Tevatron Collider from June 2006 to September 2011 (Run IIb…
Search for pair production of the scalar top quark in the electron-muon final state
V. M. Abazov, B. Abbott, M. Abolins +428
We report the result of a search for the pair production of the lightest supersymmetric partner of the top quark () in collisions at a center-of-mass energy…
Measurement of the W boson helicity in top quark decays using 5.4 fb^-1 of ppbar collision data
V. M. Abazov, B. Abbott, B. S. Acharya +425
We present a measurement of the helicity of the W boson produced in top quark decays using ttbar decays in the l+jets and dilepton final states selected from a sample of 5.4 fb^-1…
Search for pair production of the scalar top quark in muon+tau final states
D0 Collaboration, V. M. Abazov, B. Abbott +407
We present a search for the pair production of scalar top quarks (), the lightest supersymmetric partners of the top quarks, in collisions at a center-of-…
The UV Scattering Halo of the Central Source Associated with Eta Carinae
D. John Hillier, T. Gull, K. Nielsen +8
We have made an extensive study of the UV spectrum of Eta Carinae, and find that we do not directly observe the star and its wind in the UV. Because of dust along our line of sight…
Optical spectroscopy of X-Mega targets in the Carina Nebula. II. The massive double-lined O-type binary HD 93205
N. I. Morrell, R. H. Barba, V. S. Niemela +8
A new high-quality set of orbital parameters for the O-type spectroscopic binary HD93205 has been obtained combining echelle and coude CCD observations. The radial velocity orbits…
New insights into the nature of the SMC WR/LBV binary HD 5980
C. Foellmi, G. Koenigsberger, L. Georgiev +14
We present the results of optical wavelength observations of the unusual SMC eclipsing binary system HD 5980 obtained in 1999 and 2004--2005. Radial velocity curves for the eruptin…
Chandra Grating Spectroscopy of the X-ray Binary 4U 1700-37 in a Flaring State
B. Boroson, S. Vrtilek, T. Kallman +1
Chandra X-ray Observatory grating spectra of the supergiant X-ray Binary 4U 1700-37 reveal emission lines from hydrogen and helium-like S, Si, Mg, and Ne in the 4-13 A range. The s…
The massive double-lined O-type binary HD 165052
J. I. Arias, N. I. Morrell, R. H. Barba +4
We present a new optical spectroscopic study of the O-type binary HD 165052 based on high- and intermediate-resolution CCD observations. We re-investigated the spectral classificat…
A Change in the Physical State of Carinae?
K. Davidson, J. C. Martin, R. M. Humphreys +8
During Car's spectroscopic event in mid-2003, the stellar wind's bright H and H emission lines temporarily had a distinctive shape unlike that reported on any previous…
Discrete absorption components in the massive LBV Binary MWC 314
A. Lobel, C. Martayan, M. Corcoran +2
We investigate the physical properties of large-scale wind structures around massive hot stars with radiatively-driven winds. We observe Discrete Absorption Components (DACs) in op…
Combination of CDF and D0 W-Boson Mass Measurements
CDF Collaboration, T. Aaltonen, S. Amerio +771
We summarize and combine direct measurements of the mass of the boson in proton-antiproton collision data collected by CDF and D0 experiments at th…
Determination of the width of the top quark
V. M. Abazov, B. Abbott, M. Abolins +428
We extract the total width of the top quark, Gamma_t, from the partial decay width Gamma(t -> W b) measured using the t-channel cross section for single top quark production and fr…
Eta Carinae long-term variability
A. Damineli, M. Teodoro, M. Corcoran +1
We present preliminary results of our analysis on the long-term variations observed in the optical spectrum of the LBV star Eta Carinae. Based on the hydrogen line profiles, we con…
Precise measurement of the top quark mass in the dilepton channel at D0
D0 Collaboration, V. M. Abazov, B. Abbott +419
We measure the top quark mass (mt) in ppbar collisions at a center of mass energy of 1.96 TeV using dilepton ttbar->W+bW-bbar->l+nubl-nubarbbar events, where l denotes an electron,…
Comparison of and differential elastic cross sections and observation of the exchange of a colorless -odd gluonic compound
V. M. Abazov, B. Abbott, B. S. Acharya +473
We describe an analysis comparing the elastic cross section as measured by the D0 Collaboration at a center-of-mass energy of 1.96 TeV to that in collisions as meas…
Discovery of CH and OH in the -513 km s-1 Ejecta of Eta Carinae
E. Verner, F. Bruhweiler, K. E. Nielsen +3
The very massive star, Eta Carinae, is enshrouded in an unusual complex of stellar ejecta, which is highly depleted in C and O, and enriched in He and N. This circumstellar gas giv…
Combination of CDF and D0 measurements of the W boson helicity in top quark decays
The CDF, D0 Collaborations, : +864
We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integr…
On the changes in the physical properties of the ionized region around the Weigelt structures in Eta Carinae over the 5.54-yr spectroscopic cycle
M. Teodoro, T. R. Gull, M. A. Bautista +3
We present HST/STIS observations and analysis of two prominent nebular structures around the central source of Eta Carinae, the knots C and D. The former is brighter than the latte…
The D0 Silicon Microstrip Tracker
S. N. Ahmed, R. Angstadt, M. Aoki +131
This paper describes the mechanical design, the readout chain, the production, testing and the installation of the Silicon Microstrip Tracker of the D0 experiment at the Fermilab T…
The high-energy emission from HD~93129A near periastron
S. del Palacio, F. GarcÃa, D. Altamirano +12
We conducted an observational campaign towards one of the most massive and luminous colliding wind binaries in the Galaxy, HD~93129A, close to its periastron passage in 2018. Durin…
Combination of the top-quark mass measurements from the Tevatron collider
The CDF, D0 collaborations, T. Aaltonen +858
The top quark is the heaviest known elementary particle, with a mass about 40 times larger than the mass of its isospin partner, the bottom quark. It decays almost 100% of the time…
Early Chandra X-ray Observations of Eta Carinae
F. D. Seward, Y. M. Butt, M. Karovska +2
Sub-arcsecond resolution Chandra observations of Eta Carinae reveal a 40 arcsec X 70 arcsec ring or partial shell of X-ray emission surrounding an unresolved, bright, central sourc…