Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector
This paper presents a measurement of the polarisation of τ leptons produced in Z/γ ∗ → τ τ decays which is performed with a dataset of proton—proton collisions at √s = 8 TeV, corresponding to an integrated luminosity of 20.2 fb−1 recorded with the ATLAS detector at the LHC in 2012. The Z/γ ∗ → τ τ d...
| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2018
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/106595 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6560714&blobtype=pdf |
| Aporte de: | Aportado por :
SEDICI (UNLP) de
Universidad Nacional de La Plata .
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I19-R120-10915-106595 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física |
| spellingShingle |
Física Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| topic_facet |
Física |
| description |
This paper presents a measurement of the polarisation of τ leptons produced in Z/γ ∗ → τ τ decays which is performed with a dataset of proton—proton collisions at √s = 8 TeV, corresponding to an integrated luminosity of 20.2 fb−1 recorded with the ATLAS detector at the LHC in 2012. The Z/γ ∗ → τ τ decays are reconstructed from a hadronically decaying τ lepton with a single charged particle in the final state, accompanied by a τ lepton that decays leptonically. The τ polarisation is inferred from the relative fraction of energy carried by charged and neutral hadrons in the hadronic τ decays. The polarisation is measured in a fiducial region that corresponds to the kinematic region accessible to this analysis. The τ polarisation extracted over the full phase space within the Z/γ ∗ mass range of 66 < mZ/γ ∗ < 116 GeV is found to be Pτ = −0.14±0.02(stat)±0.04(syst). It is in agreement with the Standard Model prediction of Pτ = −0.1517 ± 0.0019, which is obtained from the ALPGEN event generator interfaced with the PYTHIA 6 parton shower modelling and the TAUOLA τ decay library. |
| format |
Articulo Articulo |
| author |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_facet |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_sort |
Alconada Verzini, María Josefina |
| title |
Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_short |
Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_full |
Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_fullStr |
Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_full_unstemmed |
Measurement of τ polarisation in Z/γ∗→ττ decays in proton-proton collisions at √s=8 TeV with the ATLAS detector |
| title_sort |
measurement of τ polarisation in z/γ∗→ττ decays in proton-proton collisions at √s=8 tev with the atlas detector |
| publishDate |
2018 |
| url |
http://sedici.unlp.edu.ar/handle/10915/106595 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC6560714&blobtype=pdf |
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