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Title: A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole
subject: VDP::Mathematics and natural science: 400::Physics: 430::Nuclear and elementary particle physics: 431
Publisher: Springer
Description: There are 328 authors. Only a few of them have been given author entries in addition to the Collaboration.
Journal Article
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementarymethods are used to reconstruct the energy of weakly decaying b-hadrons, Eweak B . The average value of xweak B = Eweak B /Ebeam is measured to be 0.699 ± 0.011. The resulting xweak B distribution is then analysed in the framework of two choices for the perturbative contribution (parton shower and Next to Leading Log QCD calculation) in order to extract measurements of the non-perturbative contribution to be used in studies of bhadron production in other experimental environments than LEP. In the parton shower framework, data favour the Lund model ansatz and corresponding values of its parameters have been determined within PYTHIA 6.156 from DELPHI data: a = 1.84+0.23 −0.21 and b = 0.642+0.073 −0.063 GeV−2, with a correlation factor ρ = 92.2%. Combining the data on the b-quark fragmentation distributions with those obtained at the Z peak by ALEPH, OPAL and SLD, the average value of xweak B is found to be 0.7092 ± 0.0025 and the non-perturbative fragmentation component is extracted. Using the combined distribution, a better determination of the Lund parameters is also obtained: a = 1.48+0.11 −0.10 and b = 0.509+0.024 −0.023 GeV−2, with a correlation factor ρ = 92.6%
publishedVersion
URI: http://localhost:80/handle/1956/5238
More Information: European Physical Journal C: Particles and Fields 71(2): 1557
1434-6044
http://hdl.handle.net/1956/5238
10.1140/epjc/s10052-011-1557-x
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole
subject: VDP::Mathematics and natural science: 400::Physics: 430::Nuclear and elementary particle physics: 431
Publisher: Springer
Description: There are 328 authors. Only a few of them have been given author entries in addition to the Collaboration.
Journal Article
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementarymethods are used to reconstruct the energy of weakly decaying b-hadrons, Eweak B . The average value of xweak B = Eweak B /Ebeam is measured to be 0.699 ± 0.011. The resulting xweak B distribution is then analysed in the framework of two choices for the perturbative contribution (parton shower and Next to Leading Log QCD calculation) in order to extract measurements of the non-perturbative contribution to be used in studies of bhadron production in other experimental environments than LEP. In the parton shower framework, data favour the Lund model ansatz and corresponding values of its parameters have been determined within PYTHIA 6.156 from DELPHI data: a = 1.84+0.23 −0.21 and b = 0.642+0.073 −0.063 GeV−2, with a correlation factor ρ = 92.2%. Combining the data on the b-quark fragmentation distributions with those obtained at the Z peak by ALEPH, OPAL and SLD, the average value of xweak B is found to be 0.7092 ± 0.0025 and the non-perturbative fragmentation component is extracted. Using the combined distribution, a better determination of the Lund parameters is also obtained: a = 1.48+0.11 −0.10 and b = 0.509+0.024 −0.023 GeV−2, with a correlation factor ρ = 92.6%
publishedVersion
URI: http://localhost:80/handle/1956/5238
More Information: European Physical Journal C: Particles and Fields 71(2): 1557
1434-6044
http://hdl.handle.net/1956/5238
10.1140/epjc/s10052-011-1557-x
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.
Title: A study of the b-quark fragmentation function with the DELPHI detector at LEP I and an averaged distribution obtained at the Z Pole
subject: VDP::Mathematics and natural science: 400::Physics: 430::Nuclear and elementary particle physics: 431
Publisher: Springer
Description: There are 328 authors. Only a few of them have been given author entries in addition to the Collaboration.
Journal Article
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by the DELPHI detector at LEP. Two complementarymethods are used to reconstruct the energy of weakly decaying b-hadrons, Eweak B . The average value of xweak B = Eweak B /Ebeam is measured to be 0.699 ± 0.011. The resulting xweak B distribution is then analysed in the framework of two choices for the perturbative contribution (parton shower and Next to Leading Log QCD calculation) in order to extract measurements of the non-perturbative contribution to be used in studies of bhadron production in other experimental environments than LEP. In the parton shower framework, data favour the Lund model ansatz and corresponding values of its parameters have been determined within PYTHIA 6.156 from DELPHI data: a = 1.84+0.23 −0.21 and b = 0.642+0.073 −0.063 GeV−2, with a correlation factor ρ = 92.2%. Combining the data on the b-quark fragmentation distributions with those obtained at the Z peak by ALEPH, OPAL and SLD, the average value of xweak B is found to be 0.7092 ± 0.0025 and the non-perturbative fragmentation component is extracted. Using the combined distribution, a better determination of the Lund parameters is also obtained: a = 1.48+0.11 −0.10 and b = 0.509+0.024 −0.023 GeV−2, with a correlation factor ρ = 92.6%
publishedVersion
URI: http://localhost:80/handle/1956/5238
More Information: European Physical Journal C: Particles and Fields 71(2): 1557
1434-6044
http://hdl.handle.net/1956/5238
10.1140/epjc/s10052-011-1557-x
Appears in Collections:Department of Earth Science

Files in This Item:
Click on the URI links for accessing contents.