Combined search for the Standard Model Higgs boson in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo mathvariant="bold">=</mml:mo><mml:mn>7</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:math>with the ATLAS detector

Abstract

A combined search for the Standard Model Higgs boson with the ATLAS detector at the LHC is presented. The data sets used correspond to integrated luminosities from 4.6 fb(-1) to 4.9 fb(-1) of proton-proton collisions collected at root s = 7 TeV in 2011. The Higgs boson mass ranges of 111.4 GeV to 116.6 GeV, 119.4 GeV to 122.1 GeV, and 129.2 GeV to 541 GeVare excluded at the 95% confidence level, while the range 120 GeV to 560 GeV is expected to be excluded in the absence of a signal. An excess of events is observed at Higgs boson mass hypotheses around 126 GeV with a local significance of 2.9 standard deviations (sigma). The global probability for the background to produce an excess at least as significant anywhere in the entire explored Higgs boson mass range of 110-600 GeV is estimated to be similar to 15%, corresponding to a significance of approximately 1 sigma.

Keywords

Affiliated Institutions

• Université Joseph Fourier FR
• University of California, Berkeley US
• National Institute for Subatomic Physics NL
• Institut National de Physique Nucléaire et de Physique des Particules FR
• University of Manchester GB
• Brookhaven National Laboratory US
• Yale University US
• Aix-Marseille Université FR
• Laboratoire de Physique Subatomique et de Cosmologie FR
• University of Bonn DE
• University of Toronto CA
• Siberian Branch of the Russian Academy of Sciences RU
• Istituto Nazionale di Fisica Nucleare, Sezione di Bologna IT
• Boğaziçi University TR
• University of Pennsylvania US
• Fermi National Accelerator Laboratory US
• The University of Texas at Dallas US
• Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata IT
• Duke University US
• Technische Universität Dresden DE
• Institute for High Energy Physics ES
• Ludwig-Maximilians-Universität München DE
• University of Amsterdam NL
• CEA Paris-Saclay FR
• University of Victoria CA
• Istituto Nazionale di Fisica Nucleare, Sezione di Roma I IT
• Michigan State University US
• Centre National de la Recherche Scientifique FR
• University of Rome Tor Vergata IT
• Humboldt-Universität zu Berlin DE
• Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati IT
• University at Albany, State University of New York US
• Nagoya University JP
• Rutherford Appleton Laboratory GB
• Columbia University US
• University of Freiburg DE
• University of Oklahoma US
• European Organization for Nuclear Research CH
• Hampton University US
• Obayashi (Japan) JP
• Joint Institute for Nuclear Research RU
• Commissariat à l'Énergie Atomique et aux Énergies Alternatives FR
• Universidad de Granada ES
• University of Milan IT
• The Abdus Salam International Centre for Theoretical Physics (ICTP) IT
• University of the Witwatersrand ZA
• Lawrence Berkeley National Laboratory US
• University of Udine IT
• Universidad Nacional de La Plata AR
• Université Paris-Sud FR
• Laboratoire d’Annecy de Physique des Particules FR
• University of Geneva CH
• Brandeis University US
• University of Liverpool GB
• Consejo Nacional de Investigaciones Científicas y Técnicas AR
• LIP - Laboratory of Instrumentation and Experimental Particle Physics PT
• National Research Nuclear University MEPhI RU
• Boston University US
• Lund University SE
• University of Oxford GB
• Oklahoma State University US
• Institute for High Energy Physics RU
• Weizmann Institute of Science IL
• Azerbaijan National Academy of Sciences AZ
• National Technical University of Athens GR
• University of Glasgow GB
• Tel Aviv University IL
• University of Chicago US
• Instituto de Física La Plata AR
• Istituto Nazionale di Fisica Nucleare, Sezione di Milano IT
• AGH University of Krakow PL
• SLAC National Accelerator Laboratory US
• Budker Institute of Nuclear Physics RU
• Institució Catalana de Recerca i Estudis Avançats ES
• Universitat Autònoma de Barcelona ES
• Institut de Recherche sur les Lois Fondamentales de l'Univers FR
• Queen Mary University of London GB
• University of Birmingham GB
• University of Bern CH
• University of Michigan US
• Johannes Gutenberg University Mainz DE
• P.N. Lebedev Physical Institute of the Russian Academy of Sciences RU
• High Energy Accelerator Research Organization JP
• Royal Holloway University of London GB
• Istituto Nazionale di Fisica Nucleare, Sezione di Napoli IT
• Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Udine
• The University of Tokyo JP
• Stony Brook University US
• Heidelberg University DE
• National and Kapodistrian University of Athens GR

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