Scholars@Duke

Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector

Publication ,  Journal Article
Aad, G; Abbott, B; Abdallah, J; Abdel Khalek, S; Abdinov, O; Aben, R; Abi, B; Abolins, M; Abou Zeid, OS; Abramowicz, H; Abreu, H; Abreu, R ...
Published in: Physical Review D Particles Fields Gravitation and Cosmology
July 16, 2015
Published version (DOI)

We report the observation of Higgs boson decays to WW∗based on an excess over background of 6.1 standard deviations in the dilepton final state, where the Standard Model expectation is 5.8 standard deviations. Evidence for the vector-boson fusion (VBF) production process is obtained with a significance of 3.2 standard deviations. The results are obtained from a data sample corresponding to an integrated luminosity of 25 fb-1from √s = 7 and 8 TeV pp collisions recorded by the ATLAS detector at the LHC. For a Higgs boson mass of 125.36 GeV, the ratio of the measured value to the expected value of the total production cross section times branching fraction is 1.09+0.16-0.15(stat)+0.17-0.14(syst). The corresponding ratios for the gluon fusion and vector-boson fusion production mechanisms are 1.02 ± 0.19(stat)+0.22-0.18(syst) and 1.27+0.44-0.40(stat)+0.30-0.21(syst), respectively. At √s = 8 TeV, the total production cross sections are measured to be σ(gg→H→WW∗)=4.6±0.9(stat)+0.8-0.7(syst) pb and σ(VBF H → WW∗)=0.51+0.17-0.15(stat)+0.13-0.08(syst)pb. The fiducial cross section is determined for the gluon-fusion process in exclusive final states with zero or one associated jet.

Duke Scholars

Alfred T. Goshaw
Author Alfred T. Goshaw Physics
Ashutosh V. Kotwal
Author Ashutosh V. Kotwal Physics
Mark C. Kruse
Author Mark C. Kruse Physics
Seog Oh
Author Seog Oh Physics

Published In

Physical Review D Particles Fields Gravitation and Cosmology

DOI

10.1103/PhysRevD.92.012006

EISSN

1550-2368

ISSN

1550-7998

Publication Date

July 16, 2015

Volume

92

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., … Arslan, O. (2015). Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector. Physical Review D Particles Fields Gravitation and Cosmology, 92(1). https://doi.org/10.1103/PhysRevD.92.012006
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector.” Physical Review D Particles Fields Gravitation and Cosmology 92, no. 1 (July 16, 2015). https://doi.org/10.1103/PhysRevD.92.012006.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, et al. Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector. Physical Review D Particles Fields Gravitation and Cosmology. 2015 Jul 16;92(1).
Aad, G., et al. “Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector.” Physical Review D Particles Fields Gravitation and Cosmology, vol. 92, no. 1, July 2015. Scopus, doi:10.1103/PhysRevD.92.012006.
Aad G, Abbott B, Abdallah J, Abdel Khalek S, Abdinov O, Aben R, Abi B, Abolins M, Abou Zeid OS, Abramowicz H, Abreu H, Abreu R, Abulaiti Y, Acharya BS, Adamczyk L, Adams DL, Adelman J, Adomeit S, Adye T, Agatonovic-Jovin T, Aguilar-Saavedra JA, Agustoni M, Ahlen SP, Ahmadov F, Aielli G, Akerstedt H, Åkesson TPA, Akimoto G, Akimov AV, Alberghi GL, Albert J, Albrand S, Alconada Verzini MJ, Aleksa M, Aleksandrov IN, Alexa C, Alexander G, Alexandre G, Alexopoulos T, Alhroob M, Alimonti G, Alio L, Alison J, Allbrooke BMM, Allison LJ, Allport PP, Aloisio A, Alonso A, Alonso F, Alpigiani C, Altheimer A, Alvarez Gonzalez B, Alviggi MG, Amako K, Amaral Coutinho Y, Amelung C, Amidei D, Amor Dos Santos SP, Amorim A, Amoroso S, Amram N, Amundsen G, Anastopoulos C, Ancu LS, Andari N, Andeen T, Anders CF, Anders G, Anderson KJ, Andreazza A, Andrei V, Anduaga XS, Angelidakis S, Angelozzi I, Anger P, Angerami A, Anghinolfi F, Anisenkov AV, Anjos N, Annovi A, Antonelli M, Antonov A, Antos J, Anulli F, Aoki M, Aperio Bella L, Arabidze G, Arai Y, Araque JP, Arce ATH, Arduh FA, Arguin JF, Argyropoulos S, Arik M, Armbruster AJ, Arnaez O, Arnal V, Arnold H, Arratia M, Arslan O. Observation and measurement of Higgs boson decays to WW∗with the ATLAS detector. Physical Review D Particles Fields Gravitation and Cosmology. 2015 Jul 16;92(1).

Published In

Physical Review D Particles Fields Gravitation and Cosmology

DOI

10.1103/PhysRevD.92.012006

EISSN

1550-2368

ISSN

1550-7998

Publication Date

July 16, 2015

Volume

92

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 4902 Mathematical physics
  • 0206 Quantum Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences