Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ −  Decay Channel in p p  Collisions at √ s = 13     TeV  with the ATLAS Detector

Agni Bethani; Brian Cox; Jonathan Crane; Cinzia Da Via; Nicholas Dann; Alessandra Forti; David Lack; Frederick Loebinger; Jiri Masik; Stephen Menary; Francisca Munoz Sanchez; Alexander Oh; Emily Orgill; Joleen Pater; Yvonne Peters; Andrew Pilkington; Darren Price; Yang Qin; Jacob Rawling; Nicolas Scharmberg; Savanna Shaw; Stephen Watts; Terence Wyatt; The ATLAS Collaboration

doi:10.1103/PhysRevLett.121.191801

Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ − Decay Channel in p p Collisions at √ s = 13 TeV with the ATLAS Detector

Agni Bethani, Brian Cox, Jonathan Crane, Cinzia Da Via, Nicholas Dann, Alessandra Forti, David Lack, Frederick Loebinger, Jiri Masik, Stephen Menary, Francisca Munoz Sanchez, Alexander Oh, Emily Orgill, Joleen Pater, Yvonne Peters, Andrew Pilkington, Darren Price, Yang Qin, Jacob Rawling, Nicolas ScharmbergSavanna Shaw, Stephen Watts, Terence Wyatt, The ATLAS Collaboration

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Abstract

A search for resonant and nonresonant pair production of Higgs bosons in the b¯bτ+τ− final state is presented. The search uses 36.1 fb−1 of pp collision data with √s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV<mX<402 GeV in the simplified hMSSM minimal supersymmetric model for tanβ=2and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325 GeV<mGKK<885 GeVfor k/¯MPl=1.

Original language	English
Article number	191801
Journal	Phys.Rev.Lett.
Volume	121
Early online date	7 Nov 2018
DOIs	https://doi.org/10.1103/PhysRevLett.121.191801
Publication status	Published - 2018

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Bethani, A., Cox, B., Crane, J., Da Via, C., Dann, N., Forti, A., Lack, D., Loebinger, F., Masik, J., Menary, S., Munoz Sanchez, F., Oh, A., Orgill, E., Pater, J., Peters, Y., Pilkington, A., Price, D., Qin, Y., Rawling, J., ... The ATLAS Collaboration (2018). Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ − Decay Channel in p p Collisions at √ s = 13 TeV with the ATLAS Detector. Phys.Rev.Lett., 121, Article 191801. https://doi.org/10.1103/PhysRevLett.121.191801

@article{08ec6a25e7034bf9858cc6d278825a3f,

title = "Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ − Decay Channel in p p Collisions at √ s = 13 TeV with the ATLAS Detector",

abstract = "A search for resonant and nonresonant pair production of Higgs bosons in the b¯bτ+τ− final state is presented. The search uses 36.1 fb−1 of pp collision data with √s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV<mX<402 GeV in the simplified hMSSM minimal supersymmetric model for tanβ=2and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325 GeV<mGKK<885 GeVfor k/¯MPl=1.",

author = "Agni Bethani and Brian Cox and Jonathan Crane and {Da Via}, Cinzia and Nicholas Dann and Alessandra Forti and David Lack and Frederick Loebinger and Jiri Masik and Stephen Menary and {Munoz Sanchez}, Francisca and Alexander Oh and Emily Orgill and Joleen Pater and Yvonne Peters and Andrew Pilkington and Darren Price and Yang Qin and Jacob Rawling and Nicolas Scharmberg and Savanna Shaw and Stephen Watts and Terence Wyatt and {The ATLAS Collaboration}",

year = "2018",

doi = "10.1103/PhysRevLett.121.191801",

language = "English",

volume = "121",

journal = "Phys.Rev.Lett.",

issn = "0031-9007",

publisher = "American Physical Society",

}

Bethani, A, Cox, B, Crane, J, Da Via, C, Dann, N, Forti, A, Lack, D, Loebinger, F, Masik, J, Menary, S, Munoz Sanchez, F , Oh, A, Orgill, E, Pater, J, Peters, Y , Pilkington, A , Price, D, Qin, Y, Rawling, J, Scharmberg, N, Shaw, S, Watts, S, Wyatt, T & The ATLAS Collaboration 2018, 'Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ − Decay Channel in p p Collisions at √ s = 13 TeV with the ATLAS Detector', Phys.Rev.Lett., vol. 121, 191801. https://doi.org/10.1103/PhysRevLett.121.191801

TY - JOUR

T1 - Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ − Decay Channel in p p Collisions at √ s = 13 TeV with the ATLAS Detector

AU - Bethani, Agni

AU - Cox, Brian

AU - Crane, Jonathan

AU - Da Via, Cinzia

AU - Dann, Nicholas

AU - Forti, Alessandra

AU - Lack, David

AU - Loebinger, Frederick

AU - Masik, Jiri

AU - Menary, Stephen

AU - Munoz Sanchez, Francisca

AU - Oh, Alexander

AU - Orgill, Emily

AU - Pater, Joleen

AU - Peters, Yvonne

AU - Pilkington, Andrew

AU - Price, Darren

AU - Qin, Yang

AU - Rawling, Jacob

AU - Scharmberg, Nicolas

AU - Shaw, Savanna

AU - Watts, Stephen

AU - Wyatt, Terence

AU - The ATLAS Collaboration,

PY - 2018

Y1 - 2018

N2 - A search for resonant and nonresonant pair production of Higgs bosons in the b¯bτ+τ− final state is presented. The search uses 36.1 fb−1 of pp collision data with √s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV<mX<402 GeV in the simplified hMSSM minimal supersymmetric model for tanβ=2and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325 GeV<mGKK<885 GeVfor k/¯MPl=1.

AB - A search for resonant and nonresonant pair production of Higgs bosons in the b¯bτ+τ− final state is presented. The search uses 36.1 fb−1 of pp collision data with √s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV<mX<402 GeV in the simplified hMSSM minimal supersymmetric model for tanβ=2and excluding bulk Randall-Sundrum gravitons GKK in the mass range 325 GeV<mGKK<885 GeVfor k/¯MPl=1.

U2 - 10.1103/PhysRevLett.121.191801

DO - 10.1103/PhysRevLett.121.191801

M3 - Article

SN - 0031-9007

VL - 121

JO - Phys.Rev.Lett.

JF - Phys.Rev.Lett.

M1 - 191801

ER -

Search for Resonant and Nonresonant Higgs Boson Pair Production in the b ¯ b τ + τ − Decay Channel in p p Collisions at √ s = 13 TeV with the ATLAS Detector

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