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Dr Andre Sopczak

Formerly at Lancaster University

  1. 2005
  2. Published

    Measurement of the t t¯ production cross section in pp¯ collisions at √s = 1.96 TeV using kinematic characteristics of lepton+jets events

    DO Collaboration, T., Bertram, I. A., Borissov, G. V., Ratoff, P. N. & Sopczak, A., 20/10/2005, In: Physics Letters B. 626, 1-4, p. 45-54 10 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  3. Published

    Measurement of the t t¯ production cross section in pp¯ collisions at √s = 1.96 TeV using lepton +jets events with lifetime b-tagging

    DO Collaboration, T., Bertram, I. A., Borissov, G. V., Ratoff, P. N. & Sopczak, A., 20/10/2005, In: Physics Letters B. 626, 1-4, p. 35-44 10 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  4. Published

    Measurement of the Lifetime Difference in the B0s System

    DO Collaboration, T., Bertram, I. A., Borissov, G. V., Ratoff, P. N. & Sopczak, A., 21/10/2005, In: Physical review letters. 95, 17, p. 171801

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  5. Published

    Search for a single top quark production in pp collisions at √s = 1.96 TeV

    DO Collaboration, T., Bertram, I. A., Borissov, G. V., Ratoff, P. N. & Sopczak, A., 8/12/2005, In: Physics Letters B. 622, 3-4, p. 265-276 12 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  6. Published

    Analyzing the scalar top coannihilation region at the International Linear Collider

    Carena, M. S., Finch, A., Freitas, A., Milstene, C., Nowak, H. & Sopczak, A., 12/12/2005, In: Physical Review D. 72, 11, 17 p., 115008.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  7. 2006
  8. Published

    Search for excited muons in p <span style='text-decoration: overline'></span>p collisions at √<span style='text-decoration: overline'>s</span> = 1.96- TeV}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 2006, In: Physical Review D. 73, p. 111102

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  9. 2007
  10. Published

    Evidence for production of single top quarks and first direct measurement of |V(tb)|.

    D0 Collaboration, 2007, In: Physical review letters. 98, 18, p. 181802 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  11. Published

    Experimental discrimination between charge 2e/3 top quark and charge 4e/3 exotic quark production scenarios.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 2007, In: Physical review letters. 98, p. 041801

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  12. Published
  13. Published

    Measurement of the W boson helicity in top quark decay at D0.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 2007, In: Physical Review D. 75, p. 031102

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  14. Published

    Multivariate searches for single top quark production with the D0 detector.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 2007, In: Physical Review D. 75, 092007.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  15. Published

    Search for techniparticles in e + jets events at D0.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 2007, In: Physical review letters. 98, p. 221801

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  16. Published

    Search for the pair production of scalar top quarks in the acoplanar charm jet topology in p anti-p collisions at s**(1/2) = 1.96-TeV.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 8/02/2007, In: Physics Letters B. 645, 2-3, p. 119-127 9 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  17. Published

    Lifetime difference and CP-violating phase in the B<sup>0</sup><sub></sub>s system}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 21/03/2007, In: Physical review letters. 98, p. 121801

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  18. Published

    Search for a fourth generation b-prime-quark at LEP-II at s**(1/2) = 196-GeV - 209-GeV.

    Abdallah, J., Sopczak, A. & The DELPHI Collaboration, E. A., 04/2007, In: European Physical Journal C: Particles and Fields. 50, 3, p. 507-518 12 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  19. Published

    Search for single production of scalar leptoquarks in p anti-p collisions decaying into muons and quarks with the D0 detector.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 5/04/2007, In: Physics Letters B. 647, 2-3, p. 74-81 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  20. Published

    Measurement of the top quark mass in the lepton + jets channel using the ideogram method.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 11/05/2007, In: Physical Review D. 75, p. 092001

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  21. Published

    Investigation of colour reconnection in WW events with the DELPHI detector at LEP-2.

    Abdallah, J., Sopczak, A. & The DELPHI Collaboration, E. A., 07/2007, In: European Physical Journal C: Particles and Fields. 51, 2, p. 249-269 21 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  22. Published

    Measurement of the shape of the boson rapidity distribution for pp̅ →Z/γ*→e+e-+X events produced at √s of 1.96 TeV

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 16/07/2007, In: Physical Review D. 76, 1, 10 p., 012003 .

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  23. Published

    Simulations of the Temperature Dependence of the Charge Transfer Inefficiency in a High-Speed CCD.

    Sopczak, A., Bekhouche, K., Bowdery, C., Damerell, C., Davies, G., Dehimi, L., Greenshaw, T., Koziel, M., Stefanov, K., Walder, J., Woolliscroft, T. & Worm, S., 08/2007, In: IEEE Transactions on Nuclear Science. 54, 4, p. 1429-1434 6 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  24. Published

    Study of triple-gauge-boson couplings ZZZ, ZZgamma and Zgamma gamma LEP.

    Abdallah, J., Sopczak, A. & The DELPHI Collaboration, E. A., 08/2007, In: European Physical Journal C: Particles and Fields. 51, 3, p. 525-542 18 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  25. Published

    Z gamma* production in e+e- interactions at s**(1/2) = 183 - 209-GeV.

    Abdallah, J., Sopczak, A. & The DELPHI Collaboration, E. A., 08/2007, In: European Physical Journal C: Particles and Fields. 51, 3, p. 503-523 21 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  26. Published

    Search for third-generation leptoquarks in p <span style='text-decoration: overline'></span>p collisions at √<span style='text-decoration: overline'>s</span> = 1.96-TeV}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 6/08/2007, In: Physical review letters. 99, p. 061801

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  27. Published

    Combined D0 measurements constraining the CP-violating phase and width difference in the B/s0 system.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 17/09/2007, In: Physical Review D. 76, p. 057101

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  28. Published

    Search for Pentaquarks in the Hadronic Decays of the Z Boson with the DELPHI Detector at LEP.

    Abdallah, J., Sopczak, A. & DELPHI Collaboration, E. A., 20/09/2007, In: Physics Letters B. 653, 2-4, p. 151-160 10 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  29. Published

    Search for stopped gluinos from p<span style='text-decoration: overline'></span>p collisions at √<span style='text-decoration: overline'>s</span> = 1.96-TeV}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 24/09/2007, In: Physical review letters. 99, p. 131801

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  30. Published

    Z γ production and limits on anomalous Z Z γ and Z γ γ couplings in p<span style='text-decoration: overline'></span>p collisions at √<span style='text-decoration: overline'>s</span> = 1.96- TeV}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 27/09/2007, In: Physics Letters B. 653, 5-6, p. 378-386 9 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  31. Published

    Measurement of the t <span style='text-decoration: overline'></span>t production cross-section in p <span style='text-decoration: overline'>p</span> collisions using dilepton events}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 28/09/2007, In: Physical Review D. 76, p. 052006

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  32. Published

    Study of multi-muon bundles in cosmic ray showers detected with the DELPHI detector at LEP.

    Abdallah, J., Sopczak, A. & DELPHI Collaboration, E. A., 10/2007, In: Astroparticle Physics. 28, 2, p. 273-286 14 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  33. Published

    Measurement of the Λ<sub>b</sub> lifetime in the exclusive decay Λ<sub>b</sub> → J/ψ Λ.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 1/10/2007, In: Physical review letters. 99, p. 142001

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  34. Published

    Measurement of the top quark mass in the dilepton channel.

    Sopczak, A., Bertram, I., Borissov, G., Fox, H. & Ratoff, P., 25/10/2007, In: Physics Letters B. 655, 1-2, p. 7-14 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  35. Published

    Scalar top study: Detector optimization.

    Milstene, C. & Sopczak, A., 11/2007, In: Pramana. 69, 5, p. 921-926 6 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  36. Published

    Search for B<sub>s</sub> → μ<sup></sup>+ μ<sup>-</sup> at D0}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 5/11/2007, In: Physical Review D. 76, p. 092001

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  37. Published

    Search for Production of Single Top Quarks Via tcg and tug Flavor-Changing-Neutral-Current Couplings

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 6/11/2007, In: Physical review letters. 99, p. 191802

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  38. Published

    Search for a Higgs boson produced in association with a Z boson in p <span style='text-decoration: overline'></span>p collisions}.

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 8/11/2007, In: Physics Letters B. 655, 5-6, p. 209-216 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  39. Published

    Measurement of the t[overline t] production cross section in p[overline p] collisions at sqrt(s)=1.96 TeV using kinematic characteristics of lepton+jets events

    Abazov, V. M., Bertram, I., Borissov, G., Fox, H., Ratoff, P. & Sopczak, A., 27/11/2007, In: Physical Review D. 76, p. 092007

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  40. Published

    Small visible energy scalar top iterative discriminant analysis.

    Sopczak, A., Finch, A. J., Freitas, A., Milstene, C. & Schmitt, M., 12/2007, In: Pramana. 69, 6, p. 995-999 5 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  41. Published

    Progress with vertex detector sensors for the International Linear Collider.

    Worm, S., Banda, Y., Bowdery, C., Buttar, C., Clarke, P., Cussans, D., Damerell, C., Davies, G., Devetak, E., Fopma, J., Foster, B., Gaob, R., Gillman, A. R., Goldstein, J., Greenshaw, T., Grimes, M., Harder, K., Hawes, B., Heath, H., Hillert, S., & 17 othersJeffrey, B., Johnson, E., Kundu, N., Martin, V., Murray, P., Nichols, A., Nomerotski, A., O’Shea, V., Parkes, C., Perry, C., Woolliscroft, T., Sopczak, A., Stefanov, K., Thomas, S., Tikkaneng, T., Yang, S. & Zhang, Z., 1/12/2007, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 582, 3, p. 839-842 4 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  42. Published

    Study of the Decay B D D

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Ratoff, P., Sopczak, A. & Walder, J., 12/12/2007, In: Physical review letters. 99, 24, p. 241801 7 p., 241801.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  43. Published

    Measurement of the p <span style='text-decoration: Measurement of the p[overline p]-->WZ+X cross section at sqrt(s)=1.96 TeV and limits on WWZ trilinear gauge couplings

    D0 Collaboration, 28/12/2007, In: Physical Review D. 76, 11, p. 111104 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  44. 2008
  45. Published

    Measurement of the ratios of the Z/G* + >= n jet production cross sections to the total inclusive Z/G* cross section in ppbar collisions at sqrt(s) = 1.96 TeV

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 3/01/2008, In: Physics Letters B. 658, 4, p. 112-119 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  46. Published

    Measurement of the muon charge asymmetry from W boson decays

    Collaboration, D., M. Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 23/01/2008, In: Physical Review D. 77, 1, 8 p., 011106(R) .

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  47. Published

    Search for the lightest scalar top quark in events with two leptons in p-pbar collisions at sqrt(s) = 1.96 TeV

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 24/01/2008, In: Physics Letters B. 659, 3, p. 500-508 9 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  48. Published

    Search for W' bosons decaying to an electron and a neutrino with the D0 detector

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 24/01/2008, In: Physical review letters. 100, 3, 7 p., 031804.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  49. Published

    Search for Supersymmetry in Di-Photon Final States at sqrt{s} = 1.96 TeV

    D0 Collaboration, T., M. Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 7/02/2008, In: Physics Letters B. 659, 5, p. 856-863 8 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  50. Published

    Model-independent measurement of the W boson helicity in top quark decays

    Collaboration, D., M. Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 14/02/2008, In: Physical review letters. 100, 6, 7 p., 062004.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  51. Published

    Observation and properties of the orbitally excited B_{s2}* Meson

    Collaboration, D., Abazov et al, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 28/02/2008, In: Physical review letters. 100, 8, 7 p., 082002.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  52. Published

    Search for squarks and gluinos in events with jets and missing transverse energy using 2.1 fb-1 of ppbar collision data at sqrt(s)=1.96 TeV

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 6/03/2008, In: Physics Letters B. 660, 5, p. 449-457 9 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  53. Published

    Search for Randall-Sundrum gravitons with 1 fb-1 of data from ppbar collisions at sqrt(s)=1.96 TeV

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 7/03/2008, In: Physical review letters. 100, 9, 7 p., 091802.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  54. Published

    Measurement of the shape of the boson transverse momentum distribution in ppbar -> Z/gamma* -> ee+X events produced at sqrt{s}=1.96 TeV

    Collaboration, D., Abazov, V., Bertram, I., Borissov, G., Fox, H., Love, P., Rakitin, A., Ratoff, P., Sopczak, A. & Williams, M., 11/03/2008, In: Physical review letters. 100, 10, 7 p., 102002.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

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