caa a22 4500 528782622 20190713030948.0 cr unu---uuuuu 180924e201501 xx s 000 0 eng 10.3929/ethz-b-000105247 doi 10.1007/JHEP01(2015)053 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/105247 Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at √s=8 TeV [Elektronische Daten] [CMS Collaboration, Vardan Khachatryan, Felix Bachmair, Lukas Bäni, Lorenzo Bianchini, Marco A. Buchmann, Bruno Casal, Nicolas Chanon, Günther Dissertori, Michael Dittmar, Mauro Donegà, Marc Dünser, Philipp Eller, Christophorus; id_orcid 0000-0002-6182-3380 Grab, Dmitry Hits, Jan Hoss, Werner Lustermann, Boris Mangano, Andrea C. Marini, Pablo Martinez Ruiz del Arbol, Mario Masciovecchio, Daniel Meister, Niklas Mohr, Christoph Nägeli, Francesca Nessi-Tedaldi, Francesco Pandolfi, Felicitas Pauss, Marco Peruzzi, Milena Quittnat, Liis Rebane, Marco Rossini, Andrey Starodumov, Maiko Takahashi, Konstantinos Theofilatos, Rainer; id_orcid 0000-0001-8038-1613 Wallny, Hannsjörg A. Weber, et al.] J. high energy phys. Open access ethresearch A measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions. The event selection, optimized for reconstructing a single top quark in the final state, requires exactly one isolated lepton (muon or electron) and exactly two jets, one of which is likely to originate from the hadronization of a bottom quark. The analysis is performed using data recorded at a center-of-mass energy of 8 TeV with the CMS detector at the CERN LHC in 2012. The data sample corresponds to an integrated luminosity of 19.7 fb−1. The measured helicity fractions are F L = 0.298 ± 0.028 (stat) ± 0.032(syst), F 0 = 0.720 ± 0.039 (stat) ± 0.037(syst), and F R = −0.018 ± 0.019 (stat) ± 0.011(syst). These results are used to set limits on the real part of the tWb anomalous couplings, g L and g R. Open image in new window Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 ethresearch Electroweak interaction ethresearch Hadron-Hadron Scattering ethresearch CMS Collaboration joint author Khachatryan Vardan joint author Bachmair Felix joint author Bäni Lukas joint author Bianchini Lorenzo joint author Buchmann Marco A. joint author Casal Bruno joint author Chanon Nicolas joint author Dissertori Günther joint author Dittmar Michael joint author Donegà Mauro joint author Dünser Marc joint author Eller Philipp joint author Grab Christophorus; id_orcid 0000-0002-6182-3380 joint author Hits Dmitry joint author Hoss Jan joint author Lustermann Werner joint author Mangano Boris joint author Marini Andrea C. joint author Martinez Ruiz del Arbol Pablo joint author Masciovecchio Mario joint author Meister Daniel joint author Mohr Niklas joint author Nägeli Christoph joint author Nessi-Tedaldi Francesca joint author Pandolfi Francesco joint author Pauss Felicitas joint author Peruzzi Marco joint author Quittnat Milena joint author Rebane Liis joint author Rossini Marco joint author Starodumov Andrey joint author Takahashi Maiko joint author Theofilatos Konstantinos joint author Wallny Rainer; id_orcid 0000-0001-8038-1613 joint author Weber Hannsjörg A. joint author et al. joint author Journal of High Energy Physics Berlin : Springer 1, p. 53 1126-6708 http://hdl.handle.net/20.500.11850/105247 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/105247 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 -- CMS Collaboration joint author ETHRESEARCH 700 1- Khachatryan Vardan joint author ETHRESEARCH 700 1- Bachmair Felix joint author ETHRESEARCH 700 1- Bäni Lukas joint author ETHRESEARCH 700 1- Bianchini Lorenzo joint author ETHRESEARCH 700 1- Buchmann Marco A. joint author ETHRESEARCH 700 1- Casal Bruno joint author ETHRESEARCH 700 1- Chanon Nicolas joint author ETHRESEARCH 700 1- Dissertori Günther joint author ETHRESEARCH 700 1- Dittmar Michael joint author ETHRESEARCH 700 1- Donegà Mauro joint author ETHRESEARCH 700 1- Dünser Marc joint author ETHRESEARCH 700 1- Eller Philipp joint author ETHRESEARCH 700 1- Grab Christophorus; id_orcid 0000-0002-6182-3380 joint author ETHRESEARCH 700 1- Hits Dmitry joint author ETHRESEARCH 700 1- Hoss Jan joint author ETHRESEARCH 700 1- Lustermann Werner joint author ETHRESEARCH 700 1- Mangano Boris joint author ETHRESEARCH 700 1- Marini Andrea C. joint author ETHRESEARCH 700 1- Martinez Ruiz del Arbol Pablo joint author ETHRESEARCH 700 1- Masciovecchio Mario joint author ETHRESEARCH 700 1- Meister Daniel joint author ETHRESEARCH 700 1- Mohr Niklas joint author ETHRESEARCH 700 1- Nägeli Christoph joint author ETHRESEARCH 700 1- Nessi-Tedaldi Francesca joint author ETHRESEARCH 700 1- Pandolfi Francesco joint author ETHRESEARCH 700 1- Pauss Felicitas joint author ETHRESEARCH 700 1- Peruzzi Marco joint author ETHRESEARCH 700 1- Quittnat Milena joint author ETHRESEARCH 700 1- Rebane Liis joint author ETHRESEARCH 700 1- Rossini Marco joint author ETHRESEARCH 700 1- Starodumov Andrey joint author ETHRESEARCH 700 1- Takahashi Maiko joint author ETHRESEARCH 700 1- Theofilatos Konstantinos joint author ETHRESEARCH 700 1- Wallny Rainer; id_orcid 0000-0001-8038-1613 joint author ETHRESEARCH 700 1- Weber Hannsjörg A. joint author ETHRESEARCH 700 -- et al joint author ETHRESEARCH 773 0- Journal of High Energy Physics Berlin : Springer 1, p. 53 1126-6708 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access