Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs

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URI: https://hdl.handle.net/10902/28228
ISSN: 0031-9007
ISSN: 1079-7114
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Autoría
Chatrchyan, Serguei; 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; Graziano, Alberto; Jordá Lope, Clara; 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
2013-02
Derechos
Attribution 3.0. ©2013 CERN, for the CMS Collaboration
Publicado en
Physical Review Letters, 2013, 110(8), 081803
Editorial
American Physical Society
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Resumen/Abstract
A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17.3  fb−1, collected by the CMS experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, is used. The measured mass in the ZZ channel, where both Z bosons decay to e or μ pairs, is 126.2 ±0.6(stat)±0.2(syst)  GeV. The angular distributions of the lepton pairs in this channel are sensitive to the spin-parity of the boson. Under the assumption of spin 0, the present data are consistent with the pure scalar hypothesis, while disfavoring the pure pseudoscalar hypothesis.
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Attribution 3.0. ©2013 CERN, for the CMS CollaborationExcepto si se señala otra cosa, la licencia del ítem se describe como Attribution 3.0. ©2013 CERN, for the CMS Collaboration