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Observation of the diphoton decay of the Higgs boson and measurement of its properties

Abstract: Observation of the diphoton decay mode of the recently discovered Higgs boson and measurement of some of its properties are reported. The analysis uses the entire dataset collected by the CMS experiment in proton-proton collisions during the 2011 and 2012 LHC running periods. The data samples correspond to integrated luminosities of 5.1 fb-1at vs = 7 TeV and 19.7 fb-1at 8 TeV. A clear signal is observed in the diphoton channel at a mass close to 125 GeVwith a local significance of 5.7 s, where a significance of 5.2 s is expected for the standard model Higgs boson. The mass is measured to be 124.70 ± 0.34 GeV = 124.70 ± 0.31 (stat) ± 0.15 (syst)GeV, and the best-fit signal strength relative to the standard model prediction is 1.14+0.26-0.23 = 1.14 ± 0.21 (stat) +0.09-0.05 (syst) +0.13-0.09 (theo). Additional measurements include the signal strength modifiers associated with different production mechanisms, and hypothesis tests between spin-0 and spin-2 models.

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Search for physics beyond the standard model in events with jets and two same-sign or at least three charged leptons in proton-proton collisions at ?s = 13 TeV - Artículo de Revista
Measurement of differential cross sections and charge ratios for t-channel single top quark production in proton?proton collisions at ?s=13TeV - Artículo de Revista
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Fuente: European Physical Journal C, Vol. 74, Num. 10, Art. Num. 3076, (2014)

Editorial: Springer New York LLC

Fecha de publicación: 01/10/2014

Nº de páginas: 49

Tipo de publicación: Artículo de Revista

DOI: 10.1140/epjc/s10052-014-3076-z

ISSN: 1434-6044,1434-6052

Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1140/epjc/s10052-014-3076-z

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Autoría

KHACHATRYAN, VLADIMIR

JAVIER ANDRES BROCHERO CIFUENTES

JOSE IBAN CABRILLO BARTOLOME

ALICIA CALDERON TAZON

JORGE DUARTE CAMPDERROS

MARCOS FERNANDEZ GARCIA

GERVASIO GOMEZ GRAMUGLIO

ALBERTO GRAZIANO

MARIA AMPARO LOPEZ VIRTO

JESUS MARCO DE LUCAS

RAFAEL JOSE MARCO DE LUCAS

CELSO MARTINEZ RIVERO

FRANCISCO MATORRAS WEINIG

FRANCISCA JAVIELA MUÑOZ SANCHEZ

JONATAN PIEDRA GOMEZ

MARIA TERESA RODRIGO ANORO

ANA YAIZA RODRIGUEZ MARRERO

ALBERTO RUIZ JIMENO

LUCA SCODELLARO

IVAN VILA ALVAREZ

ROCIO VILAR CORTABITARTE

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