Measurement of the mass difference between top and antitop quarks

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URI: https://hdl.handle.net/10902/28929
ISSN: 1126-6708
ISSN: 1029-8479
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Autoría
Chatrchyan, S.; Brochero Cifuentes, Javier AndrésAutoridad Unican; Cabrillo Bartolomé, José IbanAutoridad Unican; Calderón Tazón, AliciaAutoridad Unican; Chuang, S. H.; Duarte Campderros, JorgeAutoridad Unican; Felcini, Marta; Fernández García, MarcosAutoridad Unican; Gómez Gramuglio, GervasioAutoridad Unican; González Sánchez, Francisco JavierAutoridad Unican; Jordá Lope, Clara; Lobelle Pardo, Patricia; López Virto, María Amparo; Marco de Lucas, JesúsAutoridad Unican; Marco de Lucas, Rafael José; Martínez Rivero, Celso; Matorras Weinig, FranciscoAutoridad Unican; Muñoz Sánchez, Francisca Javiela; Rodrigo Anoro, TeresaAutoridad Unican; [et al.]
Fecha
2012-06
Derechos
Attribution 4.0 International. ©CERN, for the benefit of the CMS Collaboration
Publicado en
Journal of High Energy Physics, 2012, 2012(6), 109
Editorial
Springer Verlag
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Palabras clave
Hadron-hadron scattering
Resumen/Abstract
A measurement of the mass difference between the top and the antitop quark (∆mt = mt − mt ) is performed using events with a muon or an electron and at least four jets in the final state. The analysis is based on data collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.96±0.11 fb−1 , and yields the value of ∆mt = −0.44±0.46 (stat.)±0.27 (syst.) GeV. This result is consistent with equality of particle and antiparticle masses required by CPT invariance, and provides a significantly improved precision relative to existing measurements.
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