Search for the b¯b decay of the Standard Model Higgs boson in associated (W/Z)H production with the ATLAS detector

María Josefina Alconada Verzini; Francisco Alonso; Xabier Sebastián Anduaga; Francisco Anuar Arduh; Maria Teresa Dova; Fernando Gabriel Monticelli; Hernán Pablo Wahlberg; ATLAS Collaboration

doi:10.1007/JHEP01(2015)069

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Search for the b¯b decay of the Standard Model Higgs boson in associated (W/Z)H production with the ATLAS detector

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Search for the b¯b decay of the Standard Model Higgs boson in associated (W/Z)H production with the ATLAS detector

María Josefina Alconada Verzini, Francisco Alonso, Xabier Sebastián Anduaga, Francisco Anuar Arduh, Maria Teresa Dova, Fernando Gabriel Monticelli, Hernán Pablo Wahlberg and ATLAS Collaboration

The journal of high energy physics, Vol.2015(1), 69

01/14/2015

DOI: 10.1007/JHEP01(2015)069

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Abstract

A search for the b¯b decay of the Standard Model Higgs boson is performed with the ATLAS experiment using the full dataset recorded at the LHC in Run 1. The integrated luminosities used are 4.7 and 20.3 fb−1 from pp collisions at p s = 7 and 8TeV, respectively. The processes considered are associated (W/Z)H production, where W → e /μ , Z → ee/μμ and Z → vv. The observed (expected) deviation from the backgroundonly hypothesis corresponds to a significance of 1.4 (2.6) standard deviations and the ratio of the measured signal yield to the Standard Model expectation is found to be μ = 0.52 ± 0.32 (stat.) ± 0.24 (syst.) for a Higgs boson mass of 125.36 GeV. The analysis procedure is validated by a measurement of the yield of (W/Z)Z production with Z → b¯b in the same final states as for the Higgs boson search, from which the ratio of the observed signal yield to the Standard Model expectation is found to be 0.74 ± 0.09 (stat.) ± 0.14 (syst.). Facultad de Ciencias Exactas

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Details

Title: Subtitle: Search for the b¯b decay of the Standard Model Higgs boson in associated (W/Z)H production with the ATLAS detector
Creators: María Josefina Alconada Verzini
Francisco Alonso - Universidad Nacional de La Plata
Xabier Sebastián Anduaga - Universidad Nacional de La Plata
Francisco Anuar Arduh - Universidad Nacional de La Plata
Maria Teresa Dova
Fernando Gabriel Monticelli
Hernán Pablo Wahlberg
ATLAS Collaboration
Contributors: U Mallik (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The journal of high energy physics, Vol.2015(1), 69
DOI: 10.1007/JHEP01(2015)069
ISSN: 1126-6708
eISSN: 1029-8479
Language: English
Date published: 01/14/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984199662002771

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