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Title: | Measurement of the forward-backward asymmetry in Z/γ∗ → μ + μ − decays and determination of the effective weak mixing angle |
Author: | Badalov, Alexey Garrido Beltrán, Lluís Gascón Fora, David Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste Olloqui, Eduardo Rives Molina, Vicente José LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | Nov-2015 |
Publisher: | Springer Verlag |
Abstract: | The forward-backward charge asymmetry for the process qq¯ → Z/γ∗ → µ +µ − is measured as a function of the invariant mass of the dimuon system. Measurements are performed using proton proton collision data collected with the LHCb detector at √ s = 7 and 8 TeV, corresponding to integrated luminosities of 1 fb−1 and 2 fb−1 respectively. Within the Standard Model the results constrain the effective electroweak mixing angle to be sin2 θ eff W = 0.23142 ± 0.00073 ± 0.00052 ± 0.00056, where the first uncertainty is statistical, the second systematic and the third theoretical. This result is in agreement with the current world average, and is one of the most precise determinations at hadron colliders to date. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP11(2015)190 |
It is part of: | Journal of High Energy Physics, 2015, vol. 2021, p. 1-19 |
URI: | http://hdl.handle.net/2445/185810 |
Related resource: | https://doi.org/10.1007/JHEP11(2015)190 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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