Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb-1 of root s=13 TeV pp collision data 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; R. Abreu; Y. Abulaiti; B.S. Acharya; Shin-ichi Adachi; L. Adamczyk; J. Adelman; M. Adersberger; T. Adye; A. A. Affolder; Y.  Afik; T. Agatonovic-Jovin; C. Agheorghiesei; S. P. Ahlen; Alejandro Alonso Diaz; Geert-Jan Besjes; Milena Bajic; Mogens Dam; Flavia de Almeida Dias; Gorm Aske Gram Krohn Galster; Jørgen Beck Hansen; Peter Henrik Hansen; Jørn Dines Hansen; James William Monk; Fabian Alexander Jürgen Thiele; Simon Holm Stark; Troels Christian Petersen; Graig Wiglesworth; Stefania Xella

doi:10.1007/JHEP06(2018)108

Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb^-1 of root s=13 TeV pp collision data 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, R. Abreu, Y. Abulaiti, B.S. Acharya, Shin-ichi Adachi, L. Adamczyk, J. Adelman, M. Adersberger, T. Adye, A. A. Affolder, Y. AfikT. Agatonovic-Jovin, C. Agheorghiesei, S. P. Ahlen, Alejandro Alonso Diaz, Geert-Jan Besjes, Milena Bajic, Mogens Dam, Flavia de Almeida Dias, Gorm Aske Gram Krohn Galster, Jørgen Beck Hansen, Peter Henrik Hansen, Jørn Dines Hansen, James William Monk, Fabian Alexander Jürgen Thiele, Simon Holm Stark, Troels Christian Petersen, Graig Wiglesworth, Stefania Xella

Experimental Particle Physics

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Abstract

The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also targets spin-0 mediator models, where the mediator decays into a pair of dark-matter particles and is produced in association with a pair of top quarks. The search uses data from proton-proton collisions delivered by the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of s=13 TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36 fb⁻¹. A wide range of signal scenarios with different mass-splittings between the top squark, the lightest neutralino and possible intermediate supersymmetric particles are considered, including cases where the W bosons or the top quarks produced in the decay chain are off-shell. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95% confidence level in several supersymmetry benchmark models. For pair-produced top-squarks decaying into top quarks, top-squark masses up to 940 GeV are excluded. Stringent exclusion limits are also derived for all other considered top-squark decay scenarios. For the spin-0 mediator models, upper limits are set on the visible cross-section.[Figure not available: see fulltext.]

Original language	English
Article number	108
Journal	Journal of High Energy Physics
Volume	2018
Issue number	6
Number of pages	96
ISSN	1126-6708
DOIs	https://doi.org/10.1007/JHEP06(2018)108
Publication status	Published - 1 Jun 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., ... Xella, S. (2018). Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb^-1 of root s=13 TeV pp collision data with the ATLAS detector. Journal of High Energy Physics, 2018(6), [108]. https://doi.org/10.1007/JHEP06(2018)108

Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb^-1 of root s=13 TeV pp collision data with the ATLAS detector. / Aaboud, M.; Aad, G.; Abbott, B. et al.

In: Journal of High Energy Physics, Vol. 2018, No. 6, 108, 01.06.2018.

Research output: Contribution to journal › Journal article › Research › peer-review

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, Ahlen, SP, Alonso Diaz, A, Besjes, G-J, Bajic, M, Dam, M, de Almeida Dias, F, Galster, GAGK, Hansen, JB , Hansen, PH , Hansen, JD, Monk, JW, Thiele, FAJ, Stark, SH, Petersen, TC , Wiglesworth, G & Xella, S 2018, 'Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb^-1 of root s=13 TeV pp collision data with the ATLAS detector', Journal of High Energy Physics, vol. 2018, no. 6, 108. https://doi.org/10.1007/JHEP06(2018)108

@article{dbebb7315ef241d9a5fa96f3268fec11,

title = "Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb-1 of root s=13 TeV pp collision data with the ATLAS detector",

abstract = "The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also targets spin-0 mediator models, where the mediator decays into a pair of dark-matter particles and is produced in association with a pair of top quarks. The search uses data from proton-proton collisions delivered by the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of s=13 TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36 fb−1. A wide range of signal scenarios with different mass-splittings between the top squark, the lightest neutralino and possible intermediate supersymmetric particles are considered, including cases where the W bosons or the top quarks produced in the decay chain are off-shell. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95% confidence level in several supersymmetry benchmark models. For pair-produced top-squarks decaying into top quarks, top-squark masses up to 940 GeV are excluded. Stringent exclusion limits are also derived for all other considered top-squark decay scenarios. For the spin-0 mediator models, upper limits are set on the visible cross-section.[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 R. Abreu and Y. Abulaiti and B.S. Acharya and Shin-ichi 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 Ahlen, {S. P.} and {Alonso Diaz}, Alejandro and Geert-Jan Besjes and Milena Bajic and Mogens Dam and {de Almeida Dias}, Flavia and Galster, {Gorm Aske Gram Krohn} and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Monk, {James William} and Thiele, {Fabian Alexander J{\"u}rgen} and Stark, {Simon Holm} and Petersen, {Troels Christian} and Graig Wiglesworth and Stefania Xella",

year = "2018",

month = jun,

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doi = "10.1007/JHEP06(2018)108",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics (Online)",

issn = "1126-6708",

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T1 - Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb-1 of root s=13 TeV pp collision data 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 - Abreu, R.

AU - Abulaiti, Y.

AU - Acharya, B.S.

AU - Adachi, Shin-ichi

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 - Ahlen, S. P.

AU - Alonso Diaz, Alejandro

AU - Besjes, Geert-Jan

AU - Bajic, Milena

AU - Dam, Mogens

AU - de Almeida Dias, Flavia

AU - Galster, Gorm Aske Gram Krohn

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Monk, James William

AU - Thiele, Fabian Alexander Jürgen

AU - Stark, Simon Holm

AU - Petersen, Troels Christian

AU - Wiglesworth, Graig

AU - Xella, Stefania

PY - 2018/6/1

Y1 - 2018/6/1

N2 - The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also targets spin-0 mediator models, where the mediator decays into a pair of dark-matter particles and is produced in association with a pair of top quarks. The search uses data from proton-proton collisions delivered by the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of s=13 TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36 fb−1. A wide range of signal scenarios with different mass-splittings between the top squark, the lightest neutralino and possible intermediate supersymmetric particles are considered, including cases where the W bosons or the top quarks produced in the decay chain are off-shell. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95% confidence level in several supersymmetry benchmark models. For pair-produced top-squarks decaying into top quarks, top-squark masses up to 940 GeV are excluded. Stringent exclusion limits are also derived for all other considered top-squark decay scenarios. For the spin-0 mediator models, upper limits are set on the visible cross-section.[Figure not available: see fulltext.]

AB - The results of a search for the direct pair production of top squarks, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The analysis also targets spin-0 mediator models, where the mediator decays into a pair of dark-matter particles and is produced in association with a pair of top quarks. The search uses data from proton-proton collisions delivered by the Large Hadron Collider in 2015 and 2016 at a centre-of-mass energy of s=13 TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36 fb−1. A wide range of signal scenarios with different mass-splittings between the top squark, the lightest neutralino and possible intermediate supersymmetric particles are considered, including cases where the W bosons or the top quarks produced in the decay chain are off-shell. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95% confidence level in several supersymmetry benchmark models. For pair-produced top-squarks decaying into top quarks, top-squark masses up to 940 GeV are excluded. Stringent exclusion limits are also derived for all other considered top-squark decay scenarios. For the spin-0 mediator models, upper limits are set on the visible cross-section.[Figure not available: see fulltext.]

U2 - 10.1007/JHEP06(2018)108

DO - 10.1007/JHEP06(2018)108

M3 - Journal article

SN - 1126-6708

VL - 2018

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 6

M1 - 108

ER -

Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb-1 of root s=13 TeV pp collision data with the ATLAS detector

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Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb^-1 of root s=13 TeV pp collision data with the ATLAS detector