Holger Diehl

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The electron and photon reconstruction and identification algorithms used by the D0 Collaboration at the Fermilab Tevatron collider are described. The determination of the electron energy scale and resolution is presented. Studies of the performance of the electron and photon reconstruction and identification are summarized. The results are based on(More)
The DØ experiment enjoyed a very successful data-collection run at the Fermilab Tevatron collider between 1992 and 1996. Since then, the detector has been upgraded to take advantage of improvements to the Tevatron and to enhance its physics capabilities. We describe the new elements of the detector, including the silicon microstrip tracker, central fiber(More)
Charles M. Ankenbrandt,1 Muzaffer Atac,1 Bruno Autin,2 Valeri I. Balbekov,1 Vernon D. Barger,3 Odette Benary,4 J. Scott Berg,5 Michael S. Berger,5 Edgar L. Black,6 Alain Blondel,7 S. Alex Bogacz,8 T. Bolton,9 Shlomo Caspi,10 Christine Celata,10 Weiren Chou,1 David B. Cline,11 John Corlett,10 Lucien Cremaldi,12 H. Thomas Diehl,1 Alexandr Drozhdin,1 Richard(More)
V.M. Abazov, B. Abbott, M. Abolins, B. S. Acharya, M. Adams, T. Adams, E. Aguilo, S. H. Ahn, M. Ahsan, G.D. Alexeev, G. Alkhazov, A. Alton,* G. Alverson, G.A. Alves, M. Anastasoaie, L. S. Ancu, T. Andeen, S. Anderson, M. S. Anzelc, M. Aoki, Y. Arnoud, M. Arov, M. Arthaud, A. Askew, B. Åsman, A. C. S. Assis Jesus, O. Atramentov, C. Avila, C. Ay, F. Badaud,(More)
The D0 Collaboration presents first evidence for the production of single top quarks at the Fermilab Tevatron pp[over ] collider. Using a 0.9 fb(-1) dataset, we apply a multivariate analysis to separate signal from background and measure sigma(pp[over ]-->tb+X,tqb+X)=4.9+/-1.4 pb. The probability to measure a cross section at this value or higher in the(More)
We report observation of the electroweak production of single top quarks in pp[over ] collisions at sqrt[s]=1.96 TeV based on 2.3 fb(-1) of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks,(More)
We present an observation for ZZ-->l+l-l'+l'- (l, l'=e or mu) production in p[over]p collisions at a center-of-mass energy of sqrt[s]=1.96 TeV. Using 1.7 fb(-1) of data collected by the D0 experiment at the Fermilab Tevatron Collider, we observe three candidate events with an expected background of 0.14(+0.03)_(-0.02) events. The significance of this(More)
V.M. Abazov, B. Abbott, M. Abolins, B. S. Acharya, M. Adams, T. Adams, E. Aguilo, S. H. Ahn, M. Ahsan, G.D. Alexeev, G. Alkhazov, A. Alton,* G. Alverson, G.A. Alves, M. Anastasoaie, L. S. Ancu, T. Andeen, S. Anderson, B. Andrieu, M. S. Anzelc, Y. Arnoud, M. Arov, M. Arthaud, A. Askew, B. Åsman, A. C. S. Assis Jesus, O. Atramentov, C. Autermann, C. Avila, C.(More)
We present a measurement of the ratio of events with correlated t and t ̅t spins to the total number of t ̅t events. This ratio f is evaluated using a matrix-element-based approach in 729 t ̅t candidate events with a single lepton ℓ (electron or muon) and at least four jets. The analyzed p ̅p collisions data correspond to an integrated luminosity of 5.3(More)