Measurement of τ polarization in W →τν decays with the ATLAS detector in pp collisions at √s = 7 TeV

The ATLAS Collaboration

doi:10.1140/epjc/s10052-012-2062-6

Measurement of τ polarization in W →τν decays with the ATLAS detector in pp collisions at √s = 7 TeV

The ATLAS Collaboration

European Organization for Nuclear Research
University of Freiburg
University of Oklahoma
The Barcelona Institute of Science and Technology
Laboratoire de l'Accélérateur Linéaire
Section de Physique
University of Geneva
University of Oxford
Azerbaijan Academy of Sciences
Oklahoma State University
Department of Physics and Astronomy
Michigan State University
University of Toronto
Tel Aviv University
Universite Paris-Saclay
Sezione INFN di Milano
University of Milano
Sezione di Roma
Abdus Salam International Centre for Theoretical Physics
Agh University of Science and Technology Faculty of Computer Science
Brookhaven National Laboratory Physics Department
Department of Physics
Hampton University
Yale University
Max-Planck-Institut für Physik
Universität München
School of Physics and Astronomy
Queen Mary University of London
Rutherford Appleton Laboratory
Department of Physics
Brandeis University
Lisboa
Departamento de Fisica Teorica y del Cosmos and CAFPE
University of Granada
Johannes Gutenberg University
Boston University
Departments of Physics & Astronomy and Chemistry
Stony Brook University
Physics Department
University of Texas
INFN Roma Tor Vergata
University of Rome “Tor Vergata”
Department of Physics
Bogazici University
Department of Physics
Lund University
International Center for Elementary Particle Physics and Department of Physics
University of Tokyo
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Kobe University
State University of New York Albany
Department of Physics
Royal Holloway University of London
Department of Physics and Astronomy
University of Victoria
Laboratoire de Physique Subatomique et de Cosmologie de Grenoble
Joint Institute for Nuclear Research, Dubna
Horia Hulubei National Institute of Physics and Nuclear Engineering
Physics Department
National Technical University of Athens
Dipartimento di Chimica
and Physics University of Udine

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

In this paper, a measurement of τ polarization in W → τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb⁻¹, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is P_τ = −1.06±0.04 (stat) ^+0.05 _−0.07 (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [−1,−0.91]. Measurements of τ polarization have not previously been made at hadron colliders.

Original language	English
Article number	2062
Journal	European Physical Journal C
Volume	72
Issue number	7
DOIs	https://doi.org/10.1140/epjc/s10052-012-2062-6
Publication status	Published - 3 Jul 2012
Externally published	Yes

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10.1140/epjc/s10052-012-2062-6

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@article{e0e15f3563d346138d17ea99f35aa600,

title = "Measurement of τ polarization in W →τν decays with the ATLAS detector in pp collisions at √s = 7 TeV",

abstract = "In this paper, a measurement of τ polarization in W → τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb−1, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is Pτ = −1.06±0.04 (stat) +0.05 −0.07 (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 \% CL interval [−1,−0.91]. Measurements of τ polarization have not previously been made at hadron colliders.",

author = "\{The ATLAS Collaboration\} and G. Aad and B. Abbott and J. Abdallah and Khalek, \{S. Abdel\} and Abdelalim, \{A. A.\} and A. Abdesselam and O. Abdinov and B. Abi and M. Abolins and Zeid, \{O. S.Abou\} and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and L. Adamczyk and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and M. Aderholz and S. Adomeit and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and A. Akiyama and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and \{De La Taille\}, C. and Sauvan, \{J. B.\} and O. Simard",

note = "Publisher Copyright: {\textcopyright} 2012, CERN for the benefit of the ATLAS collaboration.",

year = "2012",

month = jul,

day = "3",

doi = "10.1140/epjc/s10052-012-2062-6",

language = "English",

volume = "72",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "7",

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TY - JOUR

T1 - Measurement of τ polarization in W →τν decays with the ATLAS detector in pp collisions at √s = 7 TeV

AU - The ATLAS Collaboration

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Khalek, S. Abdel

AU - Abdelalim, A. A.

AU - Abdesselam, A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - Zeid, O. S.Abou

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Adamczyk, L.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Aderholz, M.

AU - Adomeit, S.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Akiyama, A.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - De La Taille, C.

AU - Sauvan, J. B.

AU - Simard, O.

PY - 2012/7/3

Y1 - 2012/7/3

N2 - In this paper, a measurement of τ polarization in W → τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb−1, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is Pτ = −1.06±0.04 (stat) +0.05 −0.07 (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [−1,−0.91]. Measurements of τ polarization have not previously been made at hadron colliders.

AB - In this paper, a measurement of τ polarization in W → τν decays is presented. It is measured from the energies of the decay products in hadronic τ decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb−1, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the τ polarization is Pτ = −1.06±0.04 (stat) +0.05 −0.07 (syst), in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [−1,−0.91]. Measurements of τ polarization have not previously been made at hadron colliders.

U2 - 10.1140/epjc/s10052-012-2062-6

DO - 10.1140/epjc/s10052-012-2062-6

M3 - Article

AN - SCOPUS:84865464673

SN - 1434-6044

VL - 72

JO - European Physical Journal C

JF - European Physical Journal C

IS - 7

M1 - 2062

ER -

Measurement of τ polarization in W →τν decays with the ATLAS detector in pp collisions at √s = 7 TeV

Abstract

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