Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions 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; Shin-ichi Adachi; L. Adamczyk; J. Adelman; M. Adersberger; T. Adye; A. A. Affolder; Y.  Afik; C. Agheorghiesei; J. A. Aguilar-Saavedra; Geert-Jan Besjes; Milena Bajic; Alejandro Alonso Diaz; Mogens Dam; Flavia de Almeida Dias; Peter Henrik Hansen; Jørn Dines Hansen; Jørgen Beck Hansen; James William Monk; Gorm Aske Gram Krohn Galster; Simon Holm Stark; Troels Christian Petersen; Fabian Alexander Jürgen Thiele; Stefania Xella; Graig Wiglesworth

doi:10.1140/epjc/s10052-018-6081-9

Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions 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, Shin-ichi Adachi, L. Adamczyk, J. Adelman, M. Adersberger, T. Adye, A. A. Affolder, Y. Afik, C. AgheorghieseiJ. A. Aguilar-Saavedra, Geert-Jan Besjes, Milena Bajic, Alejandro Alonso Diaz, Mogens Dam, Flavia de Almeida Dias, Peter Henrik Hansen, Jørn Dines Hansen, Jørgen Beck Hansen, James William Monk, Gorm Aske Gram Krohn Galster, Simon Holm Stark, Troels Christian Petersen, Fabian Alexander Jürgen Thiele, Stefania Xella, Graig Wiglesworth

Experimental Particle Physics

19 Citations (Scopus)

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Abstract

A search for new phenomena in final states containing an e⁺e^- or μ⁺μ^- pair, jets, and large missing transverse momentum is presented. This analysis makes use of proton–proton collision data with an integrated luminosity of 36.1fb-1, collected during 2015 and 2016 at a centre-of-mass energy s=13TeV with the ATLAS detector at the Large Hadron Collider. The search targets the pair production of supersymmetric coloured particles (squarks or gluinos) and their decays into final states containing an e⁺e^- or μ⁺μ^- pair and the lightest neutralino (χ~10) via one of two next-to-lightest neutralino (χ~20) decay mechanisms: χ~20→Zχ~10, where the Z boson decays leptonically leading to a peak in the dilepton invariant mass distribution around the Z boson mass; and χ~20→ℓ+ℓ-χ~10 with no intermediate ℓ⁺ℓ^- resonance, yielding a kinematic endpoint in the dilepton invariant mass spectrum. The data are found to be consistent with the Standard Model expectation. Results are interpreted using simplified models, and exclude gluinos and squarks with masses as large as 1.85 and 1.3 Te at 95% confidence level, respectively.

Original language	English
Article number	625
Journal	European Physical Journal C
Volume	78
Issue number	8
Number of pages	38
ISSN	1434-6044
DOIs	https://doi.org/10.1140/epjc/s10052-018-6081-9
Publication status	Published - 1 Aug 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., Abulaiti, Y., Acharya, B. S., Adachi, S., Adamczyk, L., Adelman, J., Adersberger, M., Adye, T., Affolder, A. A., Afik, Y., ... Wiglesworth, G. (2018). Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector. European Physical Journal C, 78(8), Article 625. https://doi.org/10.1140/epjc/s10052-018-6081-9

Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector. / Aaboud, M.; Aad, G.; Abbott, B. et al.
In: European Physical Journal C, Vol. 78, No. 8, 625, 01.08.2018.

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, Abulaiti, Y, Acharya, BS, Adachi, S, Adamczyk, L, Adelman, J, Adersberger, M, Adye, T, Affolder, AA, Afik, Y, Agheorghiesei, C, Aguilar-Saavedra, JA, Besjes, G-J, Bajic, M, Alonso Diaz, A, Dam, M, de Almeida Dias, F, Hansen, PH , Hansen, JD , Hansen, JB, Monk, JW, Galster, GAGK, Stark, SH, Petersen, TC, Thiele, FAJ, Xella, S & Wiglesworth, G 2018, 'Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector', European Physical Journal C, vol. 78, no. 8, 625. https://doi.org/10.1140/epjc/s10052-018-6081-9

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title = "Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions with the ATLAS detector",

abstract = "A search for new phenomena in final states containing an e+e- or μ+μ- pair, jets, and large missing transverse momentum is presented. This analysis makes use of proton–proton collision data with an integrated luminosity of 36.1fb-1, collected during 2015 and 2016 at a centre-of-mass energy s=13TeV with the ATLAS detector at the Large Hadron Collider. The search targets the pair production of supersymmetric coloured particles (squarks or gluinos) and their decays into final states containing an e+e- or μ+μ- pair and the lightest neutralino (χ~10) via one of two next-to-lightest neutralino (χ~20) decay mechanisms: χ~20→Zχ~10, where the Z boson decays leptonically leading to a peak in the dilepton invariant mass distribution around the Z boson mass; and χ~20→ℓ+ℓ-χ~10 with no intermediate ℓ+ℓ- resonance, yielding a kinematic endpoint in the dilepton invariant mass spectrum. The data are found to be consistent with the Standard Model expectation. Results are interpreted using simplified models, and exclude gluinos and squarks with masses as large as 1.85 and 1.3 Te at 95% confidence level, respectively.",

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 Shin-ichi 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 Geert-Jan Besjes and Milena Bajic and {Alonso Diaz}, Alejandro and Mogens Dam and {de Almeida Dias}, Flavia and Hansen, {Peter Henrik} and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Monk, {James William} and Galster, {Gorm Aske Gram Krohn} and Stark, {Simon Holm} and Petersen, {Troels Christian} and Thiele, {Fabian Alexander J{\"u}rgen} and Stefania Xella and Graig Wiglesworth",

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T1 - Search for new phenomena using the invariant mass distribution of same-flavour opposite-sign dilepton pairs in events with missing transverse momentum in root s=13 TeV pp collisions 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, Shin-ichi

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 - Besjes, Geert-Jan

AU - Bajic, Milena

AU - Alonso Diaz, Alejandro

AU - Dam, Mogens

AU - de Almeida Dias, Flavia

AU - Hansen, Peter Henrik

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Monk, James William

AU - Galster, Gorm Aske Gram Krohn

AU - Stark, Simon Holm

AU - Petersen, Troels Christian

AU - Thiele, Fabian Alexander Jürgen

AU - Xella, Stefania

AU - Wiglesworth, Graig

PY - 2018/8/1

Y1 - 2018/8/1

N2 - A search for new phenomena in final states containing an e+e- or μ+μ- pair, jets, and large missing transverse momentum is presented. This analysis makes use of proton–proton collision data with an integrated luminosity of 36.1fb-1, collected during 2015 and 2016 at a centre-of-mass energy s=13TeV with the ATLAS detector at the Large Hadron Collider. The search targets the pair production of supersymmetric coloured particles (squarks or gluinos) and their decays into final states containing an e+e- or μ+μ- pair and the lightest neutralino (χ~10) via one of two next-to-lightest neutralino (χ~20) decay mechanisms: χ~20→Zχ~10, where the Z boson decays leptonically leading to a peak in the dilepton invariant mass distribution around the Z boson mass; and χ~20→ℓ+ℓ-χ~10 with no intermediate ℓ+ℓ- resonance, yielding a kinematic endpoint in the dilepton invariant mass spectrum. The data are found to be consistent with the Standard Model expectation. Results are interpreted using simplified models, and exclude gluinos and squarks with masses as large as 1.85 and 1.3 Te at 95% confidence level, respectively.

AB - A search for new phenomena in final states containing an e+e- or μ+μ- pair, jets, and large missing transverse momentum is presented. This analysis makes use of proton–proton collision data with an integrated luminosity of 36.1fb-1, collected during 2015 and 2016 at a centre-of-mass energy s=13TeV with the ATLAS detector at the Large Hadron Collider. The search targets the pair production of supersymmetric coloured particles (squarks or gluinos) and their decays into final states containing an e+e- or μ+μ- pair and the lightest neutralino (χ~10) via one of two next-to-lightest neutralino (χ~20) decay mechanisms: χ~20→Zχ~10, where the Z boson decays leptonically leading to a peak in the dilepton invariant mass distribution around the Z boson mass; and χ~20→ℓ+ℓ-χ~10 with no intermediate ℓ+ℓ- resonance, yielding a kinematic endpoint in the dilepton invariant mass spectrum. The data are found to be consistent with the Standard Model expectation. Results are interpreted using simplified models, and exclude gluinos and squarks with masses as large as 1.85 and 1.3 Te at 95% confidence level, respectively.

U2 - 10.1140/epjc/s10052-018-6081-9

DO - 10.1140/epjc/s10052-018-6081-9

M3 - Journal article

C2 - 30215627

SN - 1434-6044

VL - 78

JO - European Physical Journal C

JF - European Physical Journal C

IS - 8

M1 - 625

ER -