Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV

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

doi:10.1140/epjc/s10052-018-5661-z

Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV

M. Aaboud, G. Aad, B. Abbott, O. Abdinov, B Abeloos, S.H. Abidi, Ossama Sherif Alexander Abouzeid, NL Abraham, H. Abramowicz, H. Abreu, R. Abreu, Y. Abulaiti, B.S. Acharya, Sosuke Adachi, L. Adamczyk, J. Adelman, M. Adersberger, T. Adye, A. A. Affolder, Y. AfikT. Agatonovic-Jovin, C. Agheorghiesei, J. A. Aguilar-Saavedra, S. P. Ahlen, F. Ahmadov, Mogens Dam, Geert-Jan Besjes, Gorm Aske Gram Krohn Galster, Alejandro Alonso Diaz, Simon Holm Stark, Milena Bajic, James William Monk, Jørn Dines Hansen, Flavia de Almeida Dias, Graig Wiglesworth, Stefania Xella, Fabian Alexander Jürgen Thiele, Jørgen Beck Hansen, Troels Christian Petersen, Peter Henrik Hansen

Experimental Particle Physics

73 Citations (Scopus)

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Abstract

A search for doubly charged Higgs bosons with pairs of prompt, isolated, highly energetic leptons with the same electric charge is presented. The search uses a proton–proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to 36.1 fb ^{- 1} of integrated luminosity recorded in 2015 and 2016 by the ATLAS detector at the LHC. This analysis focuses on the decays H^{± ±}→ e^±e^±, H^{± ±}→ e^±μ^± and H^{± ±}→ μ^±μ^±, fitting the dilepton mass spectra in several exclusive signal regions. No significant evidence of a signal is observed and corresponding limits on the production cross-section and consequently a lower limit on m(H^{± ±}) are derived at 95% confidence level. With ℓ^±ℓ^±= e^±e^±/ μ^±μ^±/ e^±μ^±, the observed lower limit on the mass of a doubly charged Higgs boson only coupling to left-handed leptons varies from 770 to 870 GeV (850 GeV expected) for B(H^{± ±}→ ℓ^±ℓ^±) = 100 % and both the expected and observed mass limits are above 450 GeV for B(H^{± ±}→ ℓ^±ℓ^±) = 10 % and any combination of partial branching ratios.

Original language	English
Article number	199
Journal	European Physical Journal C
Volume	78
Issue number	3
Number of pages	34
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-018-5661-z
Publication status	Published - 1 Mar 2018

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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., Abreu, R., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adye, T., Affolder, A. A., ... Hansen, P. H. (2018). Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV. European Physical Journal C, 78(3), [199]. https://doi.org/10.1140/epjc/s10052-018-5661-z

Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, Abouzeid, OSA, Abraham, NL, Abramowicz, H, Abreu, H, Abreu, R, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adye, T, Affolder, AA, Afik, Y, Agatonovic-Jovin, T, Agheorghiesei, C, Aguilar-Saavedra, JA, Ahlen, SP, Ahmadov, F, Dam, M, Besjes, G-J, Galster, GAGK, Alonso Diaz, A, Stark, SH, Bajic, M, Monk, JW, Hansen, JD, de Almeida Dias, F, Wiglesworth, G , Xella, S, Thiele, FAJ, Hansen, JB , Petersen, TC & Hansen, PH 2018, 'Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV', European Physical Journal C, vol. 78, no. 3, 199. https://doi.org/10.1140/epjc/s10052-018-5661-z

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title = "Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV",

abstract = "A search for doubly charged Higgs bosons with pairs of prompt, isolated, highly energetic leptons with the same electric charge is presented. The search uses a proton–proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to 36.1 fb - 1 of integrated luminosity recorded in 2015 and 2016 by the ATLAS detector at the LHC. This analysis focuses on the decays H± ±→ e±e±, H± ±→ e±μ± and H± ±→ μ±μ±, fitting the dilepton mass spectra in several exclusive signal regions. No significant evidence of a signal is observed and corresponding limits on the production cross-section and consequently a lower limit on m(H± ±) are derived at 95% confidence level. With ℓ±ℓ±= e±e±/ μ±μ±/ e±μ±, the observed lower limit on the mass of a doubly charged Higgs boson only coupling to left-handed leptons varies from 770 to 870 GeV (850 GeV expected) for B(H± ±→ ℓ±ℓ±) = 100 % and both the expected and observed mass limits are above 450 GeV for B(H± ±→ ℓ±ℓ±) = 10 % and any combination of partial branching ratios.",

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 R. 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 T. Agatonovic-Jovin and C. Agheorghiesei and Aguilar-Saavedra, {J. A.} and Ahlen, {S. P.} and F. Ahmadov and Mogens Dam and Geert-Jan Besjes and Galster, {Gorm Aske Gram Krohn} and {Alonso Diaz}, Alejandro and Stark, {Simon Holm} and Milena Bajic and Monk, {James William} and Hansen, {J{\o}rn Dines} and {de Almeida Dias}, Flavia and Graig Wiglesworth and Stefania Xella and Thiele, {Fabian Alexander J{\"u}rgen} and Hansen, {J{\o}rgen Beck} and Petersen, {Troels Christian} and Hansen, {Peter Henrik}",

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T1 - Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV

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 - Abreu, R.

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 - Agatonovic-Jovin, T.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahlen, S. P.

AU - Ahmadov, F.

AU - Dam, Mogens

AU - Besjes, Geert-Jan

AU - Galster, Gorm Aske Gram Krohn

AU - Alonso Diaz, Alejandro

AU - Stark, Simon Holm

AU - Bajic, Milena

AU - Monk, James William

AU - Hansen, Jørn Dines

AU - de Almeida Dias, Flavia

AU - Wiglesworth, Graig

AU - Xella, Stefania

AU - Thiele, Fabian Alexander Jürgen

AU - Hansen, Jørgen Beck

AU - Petersen, Troels Christian

AU - Hansen, Peter Henrik

PY - 2018/3/1

Y1 - 2018/3/1

N2 - A search for doubly charged Higgs bosons with pairs of prompt, isolated, highly energetic leptons with the same electric charge is presented. The search uses a proton–proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to 36.1 fb - 1 of integrated luminosity recorded in 2015 and 2016 by the ATLAS detector at the LHC. This analysis focuses on the decays H± ±→ e±e±, H± ±→ e±μ± and H± ±→ μ±μ±, fitting the dilepton mass spectra in several exclusive signal regions. No significant evidence of a signal is observed and corresponding limits on the production cross-section and consequently a lower limit on m(H± ±) are derived at 95% confidence level. With ℓ±ℓ±= e±e±/ μ±μ±/ e±μ±, the observed lower limit on the mass of a doubly charged Higgs boson only coupling to left-handed leptons varies from 770 to 870 GeV (850 GeV expected) for B(H± ±→ ℓ±ℓ±) = 100 % and both the expected and observed mass limits are above 450 GeV for B(H± ±→ ℓ±ℓ±) = 10 % and any combination of partial branching ratios.

AB - A search for doubly charged Higgs bosons with pairs of prompt, isolated, highly energetic leptons with the same electric charge is presented. The search uses a proton–proton collision data sample at a centre-of-mass energy of 13 TeV corresponding to 36.1 fb - 1 of integrated luminosity recorded in 2015 and 2016 by the ATLAS detector at the LHC. This analysis focuses on the decays H± ±→ e±e±, H± ±→ e±μ± and H± ±→ μ±μ±, fitting the dilepton mass spectra in several exclusive signal regions. No significant evidence of a signal is observed and corresponding limits on the production cross-section and consequently a lower limit on m(H± ±) are derived at 95% confidence level. With ℓ±ℓ±= e±e±/ μ±μ±/ e±μ±, the observed lower limit on the mass of a doubly charged Higgs boson only coupling to left-handed leptons varies from 770 to 870 GeV (850 GeV expected) for B(H± ±→ ℓ±ℓ±) = 100 % and both the expected and observed mass limits are above 450 GeV for B(H± ±→ ℓ±ℓ±) = 10 % and any combination of partial branching ratios.

U2 - 10.1140/epjc/s10052-018-5661-z

DO - 10.1140/epjc/s10052-018-5661-z

M3 - Journal article

C2 - 31265007

SN - 1434-6044

VL - 78

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

IS - 3

M1 - 199

ER -

Search for doubly charged Higgs boson production in multi-lepton final states with the ATLAS detector using proton-proton collisions at root s=13TeV

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