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International Linear Collider Workshop - LCWS 2007/ILC 2007

29 May 2007 to 4 June 2007
DESY Hamburg
Europe/Zurich timezone

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Session

LCWS: Top/ QCD

31 May 2007, 16:00
DESY Hamburg

DESY Hamburg

Notkestraße 85 22607 Hamburg Germany

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LCWS 2007: Top and QCD

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  1. 185. An estimate of NNNLO corrections to the threshold t tbar cross section
    Dr Yuichiro Kiyo (University of Karlsruhe)
    31/05/2007, 16:00
  2. 186. Recent advances at the top threshold: summation of logs and finite lifetime corrections
    Dr Andre Hoang (MPI Munich)
    31/05/2007, 16:25
  3. 187. Towards a MC generator for ttbar production at threshold
    Filimon Gournaris (UC London)
    31/05/2007, 16:50
    We present a prototype version of a new, fully differential ttbar threshold event generator based on NNLO(NNLL) QCD calculations. We will describe how the generator is structured, the use of an interpolation scheme that is the only practical solution to make it usable in terms of CPU resources, and the use of up to date methods for the inclusion of the ILC luminosity spectrum....
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  4. 188. Determination of the luminosity spectrum and total c.m. energy
    Dr Stewart Boogert (Royal Holloway, University of London)
    31/05/2007, 17:15
    The main technical difficulties associated with measurement of the top quark threshold are from uncertainties in the luminosity spectrum due to the large beamstrahlung and the determination of absolute beam energy of the two beams. We present the ongoing developments to measure both the beam energy using electron beam diagnostics and the luminosity spectrum using the acollinearity of...
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  5. 189. Scalar Tops from Morioka'95 to DESY'07
    Dr Andre Sopczak (University of Lancaster)
    31/05/2007, 17:40
  6. 190. Factorization approach to top mass reconstruction in the continuum: What mass is measured
    Dr Andre Hoang (MPI Munich)
    01/06/2007, 09:00
  7. 192. Single Top Quarks at a Linear Collider
    Prof. Edward Boos (Moscow State University, SINP MSU)
    01/06/2007, 09:25
    Single top quark production is expected to be an interesting process for studies at both hadron and lepton colliders. A review on single top production processes in e+e-, e-gamma and gamma-gamma collision modes at a linear collider is presented. A special attention is paid to the production cross sections, spin correlation properties, some aspects of new physics via single top.
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  8. 193. CP properties of the Higgs boson via ttbar Higgs
    Prof. Rohini Godbole (IISC Bangalore)
    01/06/2007, 09:50
    We analyse the associated production of the Higgs boson with a top quar pair, ${e^-e^+ \to t\bar t\Phi}$, in the most general case where the coupling is a mixture of scalar and pseudoscalar components, $g_{\Phi t \bar t} \propto (a+i b \gamma_5)$. We have calculated the individual helicity amplitudes for the process and obtained the corresponding cross sections for each helicity state;...
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  9. 191. Top anomalous couplings with LCFI Vertexing/b-Tagging Package
    Dr Andrei Nomerotski (University of Oxford)
    02/06/2007, 11:00
    LCFI recently released the ZVTOP vertexing package which also includes the b-tagging capabilities. The talk will review the performance of the package in application to measurements of anomalous couplings of the top quark. Variables which can distiguish between b and bbar (ex vertex charge) will be especially useful to study asymmetries sensitive to the top anomalous couplings.
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  10. 194. NNLO corrections to e+e- -> 3 jets
    Prof. Thomas Gehrmann (University of Zurich)
    02/06/2007, 11:25
  11. 195. BFKL resummation effects in exclusive production of rho meson pairs at the ILC
    Mathieu Segond (LPT Orsay)
    02/06/2007, 11:50
    We calculate the Born order cross-section for the exclusive production of rho meson pairs in e+e- scattering in the Regge limit of QCD and we show the feasibility of the measurement of this process at the ILC. We also give a first estimate of the leading order BFKL evolution and we show how this process could be considered as a clean test of the BFKL resummation effects.
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