Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2000-2004  (172)
  • 1945-1949  (2)
Source
Material
Years
Year
Language
  • 1
    Electronic Resource
    Electronic Resource
    QCD analyses and determinations of $\alpha_s$ in ${\rm e}^+{\rm e}^-$ annihilation at energies between 35 and 189 GeV (2000)
    Springer
    The European physical journal 17 (2000), S. 19-51 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We employ data taken by the JADE and OPAL experiments for an integrated QCD study in hadronic e $^+$ e $^-$ annihilations at c.m.s. energies ranging from 35 GeV through 189 GeV. The study is based on jet-multiplicity related observables. The observables are obtained to high jet resolution scales with the JADE, Durham, Cambridge and cone jet finders, and compared with the predictions of various QCD and Monte Carlo models. The strong coupling strength, $\alpha_s$ , is determined at each energy by fits of ${\cal O}(\alpha_s^2)$ calculations, as well as matched ${\cal O}(\alpha_s^2)$ and NLLA predictions, to the data. Matching schemes are compared, and the dependence of the results on the choice of the renormalization scale is investigated. The combination of the results using matched predictions gives \[\alpha_s(M_{Z^0})=0.1187^{0.0034}_{0.0019}.\] The strong coupling is also obtained, at lower precision, from ${\cal O}(\alpha_s^2)$ fits of the c.m.s. energy evolution of some of the observables. A qualitative comparison is made between the data and a recent MLLA prediction for mean jet multiplicities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100520000432
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    facet.materialart.
    Unknown
    Towards automation of computing fabrics using tools from the fabric management workpackage of the EU DataGrid project (2003)
    Details
    Publication Date: 2021-01-21
    Language: English
    Type: conferenceobject , doc-type:conferenceObject
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    OPUS
  • 3
    Electronic Resource
    Electronic Resource
    Letters to the Editor (2003)
    Oxford, UK : Blackwell Science Ltd
    European journal of soil science 54 (2003), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2389.2003.00534.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Additions and Corrections-Alkylaminoalkyl Derivatives of 8-Aminoquinoline (1946)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 68 (1946), S. 2753-2753 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01216a620
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Standardization of Chemical Engineering Letter Symbols (1947)
    s.l. : American Chemical Society
    Industrial & engineering chemistry 39 (1947), S. 438-439 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie50448a002
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Search for resonant $\tilde\nu$ production at $\sqrt{s} = $ 183 to 208 GeV (2003)
    Springer
    The European physical journal 28 (2003), S. 15-26 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Searches for resonant $\tilde\nu$ production in e + e - collisions under the assumption that R-parity is not conserved and that the dominant R-parity violating coupling is $\lambda_{121}$ or $\lambda_{131}$ used data recorded by DELPHI in 1997 to 2000 at centre-of-mass energies of 183 to 208 GeV. No deviation from the Standard Model was observed. Upper limits are given for the $\lambda_{121}$ and $\lambda_{131}$ couplings as a function of the sneutrino mass and total width. The limits are especially stringent for sneutrino masses equal to the centre-of-mass energies with the highest integrated luminosities recorded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01158-8
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Single- and multi-photon production in ee collisions at $\sqrt{s}$ up to 209 GeV (2003)
    Springer
    The European physical journal 28 (2003), S. 1-13 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Events containing only energetic photons are analysed in a sample of $628 \mathrm{pb}^{-1}$ of data recorded from $\rm e^+e^-$ collisions at centre-of-mass energies between 189 and 209 GeV by the ALEPH detector at LEP. The $e^+ e^-\to \nu\bar{\nu}\gamma(\gamma)$ and $e^+ e^-\to \gamma\gamma(\gamma)$ cross sections are measured and found to be in agreement with the standard model predictions. The number of light neutrino generations is determined to be $N_\nu = 2.86 \pm 0.09$ . Upper limits are derived on the cross sections for photon production in the context of several supersymmetric models. Limits are also set on the parameters of models with extra spatial dimensions, with contact interactions and with excited electrons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2002-01129-7
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    A measurement of the photonuclear interactions of 180 GeV muons in iron (2003)
    Springer
    The European physical journal 28 (2003), S. 297-304 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The energy spectrum and the cross section of photonuclear interactions of 180 GeV muons in iron were measured at the CERN SPS using prototype modules of the ATLAS hadron calorimeter. The differential cross section $(N_{A}/A)v{d}\sigma/{d}v$ for a muon fractional energy loss $v = \Delta E_{\mu} / E_{\mu}$ was measured in the range 0.1〈v〈1. The integrated cross section $(N_{A}/A) \int_{0.1}^{1} v{d}\s igma/{d}v$ is $(0.26 \pm 0.03_{stat} \pm 0.03_{syst})\cdot 10^{-6}$ cm2g-1 in agreement with the theoretical prediction of $0.267 \cdot 10^{-6}$ cm2g-1. The best adjustment of the data to the theory is achieved for the value of $\sigma_{\gamma N} = (115 \pm 18_stat \pm 15_{syst})\mu {b}$ of the photon-nucleon cross section for photons with energies in the range from 18 to 180 GeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01176-6
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Measurement of the inclusive D $^{*\pm}$ production in $\gamma\gamma$ collisions at LEP (2003)
    Springer
    The European physical journal 28 (2003), S. 437-449 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The inclusive production of D $^{*\pm}$ mesons in two-photon collisions is measured with the ALEPH detector at e+e- centre-of-mass energies from 183 GeV to 209 GeV. A total of $360 \pm 27$ D $^{*\pm}$ meson events are observed from an integrated luminosity of 699pb-1. Contributions from direct and single-resolved processes are separated using the ratio of the transverse momentum $p_{t}^{D^{*\pm}}$ of the D $^{*\pm}$ to the visible invariant mass Wvis of the event. Differential cross sections of D $^{*\pm}$ production as functions of $p_{t}^{D^{*\pm}}$ and the pseudorapidity $\vert\eta^{D^{*\pm}}\vert $ are measured in the range 2 GeV $/c 〈 p_{t}^{D^{*\pm}} 〈 12$ GeV/c and $ \vert\eta^{D^{*\pm}}\vert 〈 1.5 $ . They are compared to next-to-leading order (NLO) perturbative QCD calculations. The extrapolation of the integrated visible D $^{*\pm}$ cross section to the total charm cross section, based on the Pythia Monte Carlo program, yields $ \sigma (e^+e^- \rightarrow e^+e^- c\bar{c})_{\left〈\sqrt{s}\right〉 = 197 GeV} = 731 \pm 74_{stat} \pm 47_{syst} \pm 157_{extr}$ pb .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epjc/s2003-01201-x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Measurements of the Z partial decay width into $c\bar c$ and multiplicity of charm quarks per b decay (2000)
    Springer
    The European physical journal 12 (2000), S. 225-241 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The partial decay width $R_c$ of the Z into $c\bar c$ quark pair and the number of charm quarks $n_c$ per b decay are measured with the DELPHI detector at LEP 1. Particle identification provides clear $D^0$ , $D^+$ , $D_s^+$ and $\Lambda_c^+$ signatures. The charm hadron production rate is measured in each channel by a fit to the scaled energy, impact parameter information and the invariant mass spectrum. Two measurements of $R_c$ are presented, from the $D^{*+}$ production rate and from the overall charm counting, including strange charm baryon production, in $c\bar c$ events. The multiplicity $n_c$ , which includes hidden $c\bar c$ and strange charm baryon production, is inferred from the charm counting in $b\bar{b}$ events. The final results are $R_c = 0.1665 \pm 0.0095$ and $n_c = 1.166 \pm 0.086$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s1005299000228
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...