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Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau))

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

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Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau)). / ALEPH Collaboration, The; Barate, R.; Betteridge, Andrew et al.
In: The European Physical Journal C (EPJ C) - Particles and Fields, Vol. 4, No. 3, 07.1998, p. 409-431.

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

Harvard

ALEPH Collaboration, T, Barate, R, Betteridge, A, Bowdery, C, Colrain, P, Finch, A, Foster, F, Hughes, G, Jones, R & Williams, M 1998, 'Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau))', The European Physical Journal C (EPJ C) - Particles and Fields, vol. 4, no. 3, pp. 409-431. https://doi.org/10.1007/s100520050217

APA

ALEPH Collaboration, T., Barate, R., Betteridge, A., Bowdery, C., Colrain, P., Finch, A., Foster, F., Hughes, G., Jones, R., & Williams, M. (1998). Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau)). The European Physical Journal C (EPJ C) - Particles and Fields, 4(3), 409-431. https://doi.org/10.1007/s100520050217

Vancouver

ALEPH Collaboration T, Barate R, Betteridge A, Bowdery C, Colrain P, Finch A et al. Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau)). The European Physical Journal C (EPJ C) - Particles and Fields. 1998 Jul;4(3):409-431. doi: 10.1007/s100520050217

Author

ALEPH Collaboration, The ; Barate, R. ; Betteridge, Andrew et al. / Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau)). In: The European Physical Journal C (EPJ C) - Particles and Fields. 1998 ; Vol. 4, No. 3. pp. 409-431.

Bibtex

@article{7332ab22404646c5b26c8c2e3f6ee4db,
title = "Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau))",
abstract = "An analysis based on 124 000 selected τ pairs recorded by the ALEPH detector at LEP provides the vector (V) and axial-vector (A) spectral functions of hadronic τ decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weighted integrals over the (V−A) spectral functions. In addition, a precise measurement of αs along with a determination of nonperturbative contributions at the τ mass scale is performed. The experimentally and theoretically most robust determination of αs(M2τ) is obtained from the (V+A) fit that yields αs(M2τ)=0.334±0.022 giving αs(M2Z)=0.1202±0.0027 after the extrapolation to the mass of the Z boson. The approach of the Operator Product Expansion (OPE) is tested experimentally studying the evolution of the τ hadronic widths to masses smaller than the τ mass.",
author = "{ALEPH Collaboration}, The and R. Barate and Andrew Betteridge and Christopher Bowdery and Paul Colrain and Alexander Finch and Frank Foster and Gareth Hughes and Roger Jones and Mark Williams",
year = "1998",
month = jul,
doi = "10.1007/s100520050217",
language = "English",
volume = "4",
pages = "409--431",
journal = "The European Physical Journal C (EPJ C) - Particles and Fields",
issn = "1434-6052",
publisher = "SPRINGER",
number = "3",

}

RIS

TY - JOUR

T1 - Measurement of the spectral functions of axial - vector hadronic tau decays and determination of alpha(S)(M**2(tau))

AU - ALEPH Collaboration, The

AU - Barate, R.

AU - Betteridge, Andrew

AU - Bowdery, Christopher

AU - Colrain, Paul

AU - Finch, Alexander

AU - Foster, Frank

AU - Hughes, Gareth

AU - Jones, Roger

AU - Williams, Mark

PY - 1998/7

Y1 - 1998/7

N2 - An analysis based on 124 000 selected τ pairs recorded by the ALEPH detector at LEP provides the vector (V) and axial-vector (A) spectral functions of hadronic τ decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weighted integrals over the (V−A) spectral functions. In addition, a precise measurement of αs along with a determination of nonperturbative contributions at the τ mass scale is performed. The experimentally and theoretically most robust determination of αs(M2τ) is obtained from the (V+A) fit that yields αs(M2τ)=0.334±0.022 giving αs(M2Z)=0.1202±0.0027 after the extrapolation to the mass of the Z boson. The approach of the Operator Product Expansion (OPE) is tested experimentally studying the evolution of the τ hadronic widths to masses smaller than the τ mass.

AB - An analysis based on 124 000 selected τ pairs recorded by the ALEPH detector at LEP provides the vector (V) and axial-vector (A) spectral functions of hadronic τ decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weighted integrals over the (V−A) spectral functions. In addition, a precise measurement of αs along with a determination of nonperturbative contributions at the τ mass scale is performed. The experimentally and theoretically most robust determination of αs(M2τ) is obtained from the (V+A) fit that yields αs(M2τ)=0.334±0.022 giving αs(M2Z)=0.1202±0.0027 after the extrapolation to the mass of the Z boson. The approach of the Operator Product Expansion (OPE) is tested experimentally studying the evolution of the τ hadronic widths to masses smaller than the τ mass.

U2 - 10.1007/s100520050217

DO - 10.1007/s100520050217

M3 - Journal article

VL - 4

SP - 409

EP - 431

JO - The European Physical Journal C (EPJ C) - Particles and Fields

JF - The European Physical Journal C (EPJ C) - Particles and Fields

SN - 1434-6052

IS - 3

ER -