Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays

Physics

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https://doi.org/10.1007/s100520100813
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Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays. / ALEPH Collaboration, The; Heister, A.; Bouhova-Thacker, Evelina et al.
In: European Physical Journal C: Particles and Fields, Vol. 22, No. 2, 11.2001, p. 217-230.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

ALEPH Collaboration, T, Heister, A, Bouhova-Thacker, E , Bowdery, C , Finch, A, Foster, F, Hughes, G & Jones, R 2001, 'Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays', European Physical Journal C: Particles and Fields, vol. 22, no. 2, pp. 217-230. https://doi.org/10.1007/s100520100813

APA

ALEPH Collaboration, T., Heister, A., Bouhova-Thacker, E., Bowdery, C., Finch, A., Foster, F., Hughes, G., & Jones, R. (2001). Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays. European Physical Journal C: Particles and Fields, 22(2), 217-230. https://doi.org/10.1007/s100520100813

Vancouver

ALEPH Collaboration T, Heister A, Bouhova-Thacker E , Bowdery C , Finch A, Foster F et al. Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays. European Physical Journal C: Particles and Fields. 2001 Nov;22(2):217-230. doi: 10.1007/s100520100813

Author

ALEPH Collaboration, The ; Heister, A. ; Bouhova-Thacker, Evelina et al. / Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays. In: European Physical Journal C: Particles and Fields. 2001 ; Vol. 22, No. 2. pp. 217-230.

Bibtex

@article{c2b7d8949bdc464a913cb350d91382ba,

title = "Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays",

abstract = "A measurement of the Michel parameters and the average ντ helicity in τ lepton decays is described. The data was collected with the ALEPH detector at LEP during the years 1991 to 1995. A total integrated luminosity of 155 pb−1 is analysed. The Michel parameters ρl,ξl,(ξδ)l(l=e,μ) , and ημ are determined for the leptonic decays, and the chirality parameters ξπ,ξρ , and ξa1 for the hadronic final states. Under the assumptions of e- μ universality and ξπ=ξρ=ξa1 , the values ρl=0.742±0.016,ηl=0.012±0.026,(ξδ)l=0.776±0.051,ξl=0.986±0.074 , and ξh=0.992±0.011 are obtained. No significant deviation is observed from the Standard Model assumption of the V-A structure of the charged weak interaction.",

author = "{ALEPH Collaboration}, The and A. Heister and Evelina Bouhova-Thacker and Christopher Bowdery and Alexander Finch and Frank Foster and Gareth Hughes and Roger Jones",

year = "2001",

month = nov,

doi = "10.1007/s100520100813",

language = "English",

volume = "22",

pages = "217--230",

journal = "European Physical Journal C: Particles and Fields",

issn = "1434-6044",

publisher = "SPRINGER",

number = "2",

}

RIS

TY - JOUR

T1 - Measurement of the Michel parameters and the nu/tau helicity in tau lepton decays

AU - ALEPH Collaboration, The

AU - Heister, A.

AU - Bouhova-Thacker, Evelina

AU - Bowdery, Christopher

AU - Finch, Alexander

AU - Foster, Frank

AU - Hughes, Gareth

AU - Jones, Roger

PY - 2001/11

Y1 - 2001/11

N2 - A measurement of the Michel parameters and the average ντ helicity in τ lepton decays is described. The data was collected with the ALEPH detector at LEP during the years 1991 to 1995. A total integrated luminosity of 155 pb−1 is analysed. The Michel parameters ρl,ξl,(ξδ)l(l=e,μ) , and ημ are determined for the leptonic decays, and the chirality parameters ξπ,ξρ , and ξa1 for the hadronic final states. Under the assumptions of e- μ universality and ξπ=ξρ=ξa1 , the values ρl=0.742±0.016,ηl=0.012±0.026,(ξδ)l=0.776±0.051,ξl=0.986±0.074 , and ξh=0.992±0.011 are obtained. No significant deviation is observed from the Standard Model assumption of the V-A structure of the charged weak interaction.

AB - A measurement of the Michel parameters and the average ντ helicity in τ lepton decays is described. The data was collected with the ALEPH detector at LEP during the years 1991 to 1995. A total integrated luminosity of 155 pb−1 is analysed. The Michel parameters ρl,ξl,(ξδ)l(l=e,μ) , and ημ are determined for the leptonic decays, and the chirality parameters ξπ,ξρ , and ξa1 for the hadronic final states. Under the assumptions of e- μ universality and ξπ=ξρ=ξa1 , the values ρl=0.742±0.016,ηl=0.012±0.026,(ξδ)l=0.776±0.051,ξl=0.986±0.074 , and ξh=0.992±0.011 are obtained. No significant deviation is observed from the Standard Model assumption of the V-A structure of the charged weak interaction.

U2 - 10.1007/s100520100813

DO - 10.1007/s100520100813

M3 - Journal article

VL - 22

SP - 217

EP - 230

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

IS - 2

ER -

Research

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