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ALEPH Archived Data Publications

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2009-01-19
17:36
Residual Bose-Einstein Correlations and the Söding Model / Beddall, Andrew (Gaziantep U.) ; Beddall, Ayda (Gaziantep U.) ; Bingül, Ahmet (Gaziantep U.)
Bose--Einstein correlations between identical pions close in phase-space is thought to be responsible for the observed distortion in mass spectra of non-identical pions. For example in the decays \rho 0 \rightarrow \pi + \pi - and \rho \pm \rightarrow \pi \pm \pi 0, such distortions are a residual effect where the pions from the \rho decay interact with other identical pions that are close in phase-space. [...]
CERN-ALEPH-ARCH-DATA-2009-004.- Geneva : CERN, 2008 - 8 p. - Published in : Acta Phys. Pol. B 39 (2008) 173-180

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2009-01-19
17:32
Measurement of the Dalitz-decay branching ratio of the $\pi^{0}$ / Beddall, Andrew (Gaziantep U.) ; Beddall, Ayda (Gaziantep U.)
The ratio is measured by comparing the production rates of the π0 in the two decay channels. The analysis is based on approximately four million hadronic decays of the Z boson recorded by the ALEPH detector in the years 1991 to 1995. [...]
CERN-ALEPH-ARCH-DATA-2009-003.- Geneva : CERN, 2008 - 6 p. - Published in : Eur. Phys. J. C 54 (2008) 365-370 Springer Open Access article: PDF;

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2009-01-19
17:27
Inclusive production of the ρ±(770) meson in hadronic decays of the Z boson / Beddall, Andrew (Gaziantep U.) ; Beddall, Ayda (Gaziantep U.) ; Bingül, Ahmet (Gaziantep U.)
The inclusive production rate of the ρ±(770) vector meson in hadronic Z decays is measured with the ALEPH detector at the LEP collider. A total of 3.2 million hadronic events are selected from data recorded between 1991 and 1995. [...]
CERN-ALEPH-ARCH-DATA-2009-002.- Geneva : CERN, 2009 - 7 p. - Published in : Phys. Lett. B 670 (2009) 300-306

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2007-12-04
23:37
First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in $e^+ e^-$ annihilations / Dissertori, G (Zurich, ETH) ; Gehrmann-De Ridder, A (Zurich, ETH) ; Gehrmann, T (Zurich U.) ; Glover, E W N (Durham U.) ; Marlen-Heinrich, G (Edinburgh U.) ; Stenzel, H (Giessen U.)
We present the first determination of the strong coupling constant from a fit of next-to-next-to-leading order QCD predictions to event-shape variables, measured in e+e− annihilations at LEP. The data have been collected by the ALEPH detector at centre-of-mass energies between 91 and 206 GeV. [...]
arXiv:0712.0327; ZU-TH 28-07; IPPP-07-91; EDINBURGH 2007-48; ETHZ-IPP RP-2007-04; CERN-ALEPH-ARCH-DATA-2009-001.- Geneva : CERN, 2008 - 24 p. - Published in : JHEP 02 (2008) 040 External link: Preprint

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