Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector

M. Aaboud; G. Aad; B. Abbott; O. Abdinov; B Abeloos; S.H. Abidi; Ossama Sherif Alexander AbouZeid; NL Abraham; H. Abramowicz; H. Abreu; Y. Abulaiti; B.S. Acharya; Sosuke Adachi; L. Adamczyk; J. Adelman; M. Adersberger; T. Adye; A. A. Affolder; Y.  Afik; C. Agheorghiesei; J. A. Aguilar-Saavedra; F. Ahmadov; G. Aielli; S. Akatsuka; T. P. A. Akesson; E. Akilli; Flavia de Almeida Dias; Jørgen Beck Hansen; Peter Henrik Hansen; James William Monk; Alejandro Alonso Diaz; Troels Christian Petersen; Graig Wiglesworth; Geert-Jan Besjes; Milena Bajic; Stefania Xella; Gorm Aske Gram Krohn Galster; Jørn Dines Hansen; Mogens Dam; hqz214 hqz214; Simon Holm Stark; Rosanna Ignazzi; Alessandra Camplani; ATLAS

doi:10.1007/JHEP01(2019)030

Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B Abeloos, S.H. Abidi, Ossama Sherif Alexander AbouZeid, NL Abraham, H. Abramowicz, H. Abreu, Y. Abulaiti, B.S. Acharya, Sosuke Adachi, L. Adamczyk, J. Adelman, M. Adersberger, T. Adye, A. A. Affolder, Y. Afik, C. AgheorghieseiJ. A. Aguilar-Saavedra, F. Ahmadov, G. Aielli, S. Akatsuka, T. P. A. Akesson, E. Akilli, Flavia de Almeida Dias, Jørgen Beck Hansen, Peter Henrik Hansen, James William Monk, Alejandro Alonso Diaz, Troels Christian Petersen, Graig Wiglesworth, Geert-Jan Besjes, Milena Bajic, Stefania Xella, Gorm Aske Gram Krohn Galster, Jørn Dines Hansen, Mogens Dam, hqz214 hqz214, Simon Holm Stark, Rosanna Ignazzi, Alessandra Camplani, ATLAS

Experimental Particle Physics

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Abstract

A search for Higgs boson pair production in the bb¯ bb¯ final state is carried out with up to 36.1 fb⁻¹ of LHC proton-proton collision data collected at s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bb¯ bb¯ are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.[Figure not available: see fulltext.].

Original language	English
Article number	UNSP 030
Journal	Journal of High Energy Physics
Volume	2019
Issue number	1
Number of pages	49
ISSN	1126-6708
DOIs	https://doi.org/10.1007/JHEP01(2019)030
Publication status	Published - 1 Jan 2019

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Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abidi, S. H., AbouZeid, O. S. A., Abraham, NL., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adye, T., Affolder, A. A., Afik, Y., ... ATLAS (2019). Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector. Journal of High Energy Physics, 2019(1), Article UNSP 030. https://doi.org/10.1007/JHEP01(2019)030

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adye, T, Affolder, AA, Afik, Y, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahmadov, F, Aielli, G, Akatsuka, S, Akesson, TPA, Akilli, E, de Almeida Dias, F, Hansen, JB , Hansen, PH, Monk, JW, Alonso Diaz, A, Petersen, TC , Wiglesworth, G, Besjes, G-J, Bajic, M, Xella, S, Galster, GAGK, Hansen, JD , Dam, M, hqz214, H, Stark, SH, Ignazzi, R, Camplani, A & ATLAS 2019, 'Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector', Journal of High Energy Physics, vol. 2019, no. 1, UNSP 030. https://doi.org/10.1007/JHEP01(2019)030

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title = "Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector",

abstract = "A search for Higgs boson pair production in the bb¯ bb¯ final state is carried out with up to 36.1 fb−1 of LHC proton-proton collision data collected at s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bb¯ bb¯ are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.[Figure not available: see fulltext.].",

author = "M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B Abeloos and S.H. Abidi and AbouZeid, {Ossama Sherif Alexander} and NL Abraham and H. Abramowicz and H. Abreu and Y. Abulaiti and B.S. Acharya and Sosuke Adachi and L. Adamczyk and J. Adelman and M. Adersberger and T. Adye and Affolder, {A. A.} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, {J. A.} and F. Ahmadov and G. Aielli and S. Akatsuka and Akesson, {T. P. A.} and E. Akilli and {de Almeida Dias}, Flavia and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Monk, {James William} and {Alonso Diaz}, Alejandro and Petersen, {Troels Christian} and Graig Wiglesworth and Geert-Jan Besjes and Milena Bajic and Stefania Xella and Galster, {Gorm Aske Gram Krohn} and Hansen, {J{\o}rn Dines} and Mogens Dam and hqz214 hqz214 and Stark, {Simon Holm} and Rosanna Ignazzi and Alessandra Camplani and ATLAS",

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doi = "10.1007/JHEP01(2019)030",

language = "English",

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T1 - Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B

AU - Abidi, S.H.

AU - AbouZeid, Ossama Sherif Alexander

AU - Abraham, NL

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, Sosuke

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Akesson, T. P. A.

AU - Akilli, E.

AU - de Almeida Dias, Flavia

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Monk, James William

AU - Alonso Diaz, Alejandro

AU - Petersen, Troels Christian

AU - Wiglesworth, Graig

AU - Besjes, Geert-Jan

AU - Bajic, Milena

AU - Xella, Stefania

AU - Galster, Gorm Aske Gram Krohn

AU - Hansen, Jørn Dines

AU - Dam, Mogens

AU - hqz214, hqz214

AU - Stark, Simon Holm

AU - Ignazzi, Rosanna

AU - Camplani, Alessandra

AU - ATLAS

PY - 2019/1/1

Y1 - 2019/1/1

N2 - A search for Higgs boson pair production in the bb¯ bb¯ final state is carried out with up to 36.1 fb−1 of LHC proton-proton collision data collected at s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bb¯ bb¯ are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.[Figure not available: see fulltext.].

AB - A search for Higgs boson pair production in the bb¯ bb¯ final state is carried out with up to 36.1 fb−1 of LHC proton-proton collision data collected at s=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to bb¯ bb¯ are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.[Figure not available: see fulltext.].

U2 - 10.1007/JHEP01(2019)030

DO - 10.1007/JHEP01(2019)030

M3 - Journal article

SN - 1126-6708

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 1

M1 - UNSP 030

ER -

Search for pair production of Higgs bosons in the b(b)over-barb(b)over-bar final state using proton-proton collisions at root s=13 TeV with the ATLAS detector

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