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**Measurement of the tau lepton lifetime with the three-dimensional impact parameter method.** / ALEPH Collaboration.

Research output: Contribution to journal › Journal article › peer-review

ALEPH Collaboration 1997, 'Measurement of the tau lepton lifetime with the three-dimensional impact parameter method', *Zeitschrift für Physik C Particles and Fields*, vol. 74, no. 3, pp. 387-398.

ALEPH Collaboration (1997). Measurement of the tau lepton lifetime with the three-dimensional impact parameter method. *Zeitschrift für Physik C Particles and Fields*, *74*(3), 387-398.

ALEPH Collaboration. Measurement of the tau lepton lifetime with the three-dimensional impact parameter method. Zeitschrift für Physik C Particles and Fields. 1997;74(3):387-398.

@article{1d7f00d492f4485cacc79ebd96944a42,

title = "Measurement of the tau lepton lifetime with the three-dimensional impact parameter method",

abstract = "A new method is presented for the measurement of the mean tau lepton lifetime using events in which tau's are pair-produced and both tau's decay to hadrons and nu(tau). Based on the correlation between the two tau's produced at a symmetric e(+)e(-) collider, the 3DIP method relies on the three-dimensional information from a double-sided vertex detector and on kinematic constraints for the precise measurement of the tau decay angles. Using the data collected from 1992 to 1994 with the ALEPH detector at LEP, a tau lifetime of 288.0 +/- 3.1 +/- 1.3 fs is obtained from the sample in which both tau's decay to one charged track, and 292.8 +/- 5.6 +/- 3.0 fs from the sample in which one tau decays to one prong and the other to three prongs. The results show small statistical correlations with those derived from other methods. When combined with the previously published ALEPH measurements, the resulting tau lifetime is 291.2 +/- 2.0 +/- 1.2 fs.",

author = "R. Barate and Alexander Finch and {ALEPH Collaboration}",

year = "1997",

language = "English",

volume = "74",

pages = "387--398",

journal = "Zeitschrift f{\"u}r Physik C Particles and Fields",

issn = "0170-9739",

publisher = "Springer Verlag",

number = "3",

}

TY - JOUR

T1 - Measurement of the tau lepton lifetime with the three-dimensional impact parameter method

AU - Barate, R.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1997

Y1 - 1997

N2 - A new method is presented for the measurement of the mean tau lepton lifetime using events in which tau's are pair-produced and both tau's decay to hadrons and nu(tau). Based on the correlation between the two tau's produced at a symmetric e(+)e(-) collider, the 3DIP method relies on the three-dimensional information from a double-sided vertex detector and on kinematic constraints for the precise measurement of the tau decay angles. Using the data collected from 1992 to 1994 with the ALEPH detector at LEP, a tau lifetime of 288.0 +/- 3.1 +/- 1.3 fs is obtained from the sample in which both tau's decay to one charged track, and 292.8 +/- 5.6 +/- 3.0 fs from the sample in which one tau decays to one prong and the other to three prongs. The results show small statistical correlations with those derived from other methods. When combined with the previously published ALEPH measurements, the resulting tau lifetime is 291.2 +/- 2.0 +/- 1.2 fs.

AB - A new method is presented for the measurement of the mean tau lepton lifetime using events in which tau's are pair-produced and both tau's decay to hadrons and nu(tau). Based on the correlation between the two tau's produced at a symmetric e(+)e(-) collider, the 3DIP method relies on the three-dimensional information from a double-sided vertex detector and on kinematic constraints for the precise measurement of the tau decay angles. Using the data collected from 1992 to 1994 with the ALEPH detector at LEP, a tau lifetime of 288.0 +/- 3.1 +/- 1.3 fs is obtained from the sample in which both tau's decay to one charged track, and 292.8 +/- 5.6 +/- 3.0 fs from the sample in which one tau decays to one prong and the other to three prongs. The results show small statistical correlations with those derived from other methods. When combined with the previously published ALEPH measurements, the resulting tau lifetime is 291.2 +/- 2.0 +/- 1.2 fs.

M3 - Journal article

VL - 74

SP - 387

EP - 398

JO - Zeitschrift für Physik C Particles and Fields

JF - Zeitschrift für Physik C Particles and Fields

SN - 0170-9739

IS - 3

ER -