Measurement of the Higgs boson mass from the H → γγ and H→ ZZ∗→ 4` channels with the ATLAS detector using 25 fb−1 of pp collision data

Aad, G. and Abbott, B. and Abdallah, J. and Khalek, S. A. and Abdinov, O. and Aben, R. and Abi, B. and Abidi, S. H. and Abolins, M. and AbouZeid, O. S. and Abramowicz, H. and Abreu, H. and Abreu, R. and Abulaiti, Y. and Acharya, B. S. and Adamczyk, L. and Adams, D. L. and Adelman, J. and Adomeit, S. and Adye, T. and Agatonovic-Jovin, T. and Aguilar-Saavedra, J. A. and Agustoni, M. and Ahlen, S. P. and Ahmadov, F. and Aielli, G. and Akerstedt, H. and Akesson, T. P. A. and Akimoto, G. and Akimov, A. V. and Krasznahorkay, Attila and Nagai, Yoshikazu and Pásztor, Gabriella and Tóth, József (2014) Measurement of the Higgs boson mass from the H → γγ and H→ ZZ∗→ 4` channels with the ATLAS detector using 25 fb−1 of pp collision data. PHYSICAL REVIEW D, 90 (5). ISSN 2470-0010

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Abstract

An improved measurement of the mass of the Higgs boson is derived from a combined fit to the invariant mass spectra of the decay channels H → γγ and H→ ZZ∗→ 4`. The analysis uses the pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 25 fb−1. The measured value of the Higgs boson mass is mH = 125.36 ± 0.37 (stat) ± 0.18 (syst) GeV. This result is based on improved energy-scale calibrations for photons, electrons, and muons as well as other analysis improvements, and supersedes the previous result from ATLAS. Upper limits on the total width of the Higgs boson are derived from fits to the invariant mass spectra of the H → γγ and H→ ZZ∗→ 4` decay channels.

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