Publicación
Artículo científico (article).
Combinations of single-top-quark production cross-section measurements and |fLVVtb| determinations at √s = 7 and 8 TeV with the ATLAS and CMS experiments
UCrea Repositorio Abierto de la Universidad de Cantabria
oai:repositorio.unican.es:10902/18202
UCrea Repositorio Abierto de la Universidad de Cantabria
- Sirunyan, A. M.
- Cabrillo Bartolomé, José Ibán
- Calderón Tazón, Alicia
- Chazin Quero, Bárbara
- Duarte Campderros, Jorge
- Fernández García, Marcos
- Fernández Manteca, Pedro José
- García Alonso, Andrea
- García Ferrero, Juan
- Gómez Gramuglio, Gervasio
- López Virto, María Amparo
- Marco de Lucas, Jesús
- Martínez Rivero, Celso
- Martínez Ruiz del Árbol, Pablo
- Matorras Weinig, Francisco
- Piedra Gómez, Jonatan
- Prieëls, Cédric
- Rodrigo Anoro, Teresa
- Ruiz Jimeno, Alberto
- Scodellaro, Luca
- Trevisani, Nicolo
- Vila Álvarez, Iván
- Vilar Cortabitarte, Rocío
This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at √s = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at √s = 7 TeV and 12.2 to 20.3 fb−1 at √s = 8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5 ± 5.7 pb and 87.7 ± 5.8 pb at √s = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at √s = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at √s = 8 TeV. The square of the magnitude of the CKM matrix element Vtb multiplied by a form factor fLV is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation |Vtd|, |Vts| ≪ |Vtb|. All the |fLVVtb|2 determinations, extracted from individual ratios at √s = 7 and 8 TeV, are combined, resulting in |fLVVtb| = 1.02 ± 0.04 (meas.) ± 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.
DOI: http://hdl.handle.net/10902/18202
UCrea Repositorio Abierto de la Universidad de Cantabria
oai:repositorio.unican.es:10902/18202
HANDLE: http://hdl.handle.net/10902/18202
UCrea Repositorio Abierto de la Universidad de Cantabria
oai:repositorio.unican.es:10902/18202
Ver en: http://hdl.handle.net/10902/18202
UCrea Repositorio Abierto de la Universidad de Cantabria
oai:repositorio.unican.es:10902/18202