Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

G. Aad; B. Abbott; J. Abdallah; S. Abdel Khalek; O. Abdinov; R. Aben; B. Abi; M. Abolins; O.S. AbouZeid; H. Abramowicz; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Troels Christian Petersen; Peter Henrik Hansen; Stefania Xella; Lotte Ansgaard Thomsen; Lars Egholm Pedersen; Gorm Aske Gram Krohn Galster; Graig Wiglesworth; James William Monk; Ask Emil Løvschall-Jensen; Alejandro Alonso Diaz; Almut Maria Pingel; Morten Dam Jørgensen; Sascha Mehlhase

doi:10.1140/epjc/s10052-014-2883-6

Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

G. Aad, B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, M. Abolins, O.S. AbouZeid, H. Abramowicz, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Troels Christian Petersen, Peter Henrik Hansen, Stefania Xella, Lotte Ansgaard Thomsen, Lars Egholm Pedersen, Gorm Aske Gram Krohn Galster, Graig WiglesworthJames William Monk, Ask Emil Løvschall-Jensen, Alejandro Alonso Diaz, Almut Maria Pingel, Morten Dam Jørgensen, Sascha Mehlhase

Eksperimentel subatomar fysik

33 Citationer (Scopus)

Abstract

A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb⁻¹. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t₂) followed by the decay to the lighter top squark state (t₁) via t₂ → Zt₁, and for t₁ pair production in natural gaugemediated supersymmetry breaking scenarios where the neutralino (χ ₀₁) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G ) via the χ ₀₁ → Z G process.

Originalsprog	Engelsk
Artikelnummer	2883
Tidsskrift	The European Physical Journal C: Particles and Fields
Vol/bind	74
ISSN	1434-6044
DOI	https://doi.org/10.1140/epjc/s10052-014-2883-6
Status	Udgivet - 3 jun. 2014

Adgang til dokumentet

10.1140/epjc/s10052-014-2883-6

Citationsformater

Aad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., Abi, B., Abolins, M., AbouZeid, O. S., Abramowicz, H., Dam, M., Hansen, J. D., Hansen, J. B., Petersen, T. C., Hansen, P. H., Xella, S., Thomsen, L. A., Pedersen, L. E., Galster, G. A. G. K., ... Mehlhase, S. (2014). Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector. The European Physical Journal C: Particles and Fields, 74, Artikel 2883. https://doi.org/10.1140/epjc/s10052-014-2883-6

Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector. / Aad, G.; Abbott, B.; Abdallah, J. et al.
I: The European Physical Journal C: Particles and Fields, Bind 74, 2883, 03.06.2014.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Aad, G, Abbott, B, Abdallah, J, Abdel Khalek, S, Abdinov, O, Aben, R, Abi, B, Abolins, M, AbouZeid, OS, Abramowicz, H, Dam, M , Hansen, JD , Hansen, JB , Petersen, TC , Hansen, PH , Xella, S, Thomsen, LA, Pedersen, LE, Galster, GAGK, Wiglesworth, G, Monk, JW, Løvschall-Jensen, AE, Alonso Diaz, A, Pingel, AM, Jørgensen, MD & Mehlhase, S 2014, 'Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector', The European Physical Journal C: Particles and Fields, bind 74, 2883. https://doi.org/10.1140/epjc/s10052-014-2883-6

@article{3e28c313c8cb4557b6ee49e3a67a3a3c,

title = "Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector",

abstract = "A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb−1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2 → Zt1, and for t1 pair production in natural gaugemediated supersymmetry breaking scenarios where the neutralino (χ 01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G ) via the χ 01 → Z G process.",

author = "G. Aad and B. Abbott and J. Abdallah and {Abdel Khalek}, S. and O. Abdinov and R. Aben and B. Abi and M. Abolins and O.S. AbouZeid and H. Abramowicz and Mogens Dam and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Petersen, {Troels Christian} and Hansen, {Peter Henrik} and Stefania Xella and Thomsen, {Lotte Ansgaard} and Pedersen, {Lars Egholm} and Galster, {Gorm Aske Gram Krohn} and Graig Wiglesworth and Monk, {James William} and L{\o}vschall-Jensen, {Ask Emil} and {Alonso Diaz}, Alejandro and Pingel, {Almut Maria} and J{\o}rgensen, {Morten Dam} and Sascha Mehlhase",

year = "2014",

month = jun,

day = "3",

doi = "10.1140/epjc/s10052-014-2883-6",

language = "English",

volume = "74",

journal = "The European Physical Journal C: Particles and Fields",

issn = "1434-6044",

publisher = "Springer",

}

TY - JOUR

T1 - Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdel Khalek, S.

AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - AbouZeid, O.S.

AU - Abramowicz, H.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Petersen, Troels Christian

AU - Hansen, Peter Henrik

AU - Xella, Stefania

AU - Thomsen, Lotte Ansgaard

AU - Pedersen, Lars Egholm

AU - Galster, Gorm Aske Gram Krohn

AU - Wiglesworth, Graig

AU - Monk, James William

AU - Løvschall-Jensen, Ask Emil

AU - Alonso Diaz, Alejandro

AU - Pingel, Almut Maria

AU - Jørgensen, Morten Dam

AU - Mehlhase, Sascha

PY - 2014/6/3

Y1 - 2014/6/3

N2 - A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb−1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2 → Zt1, and for t1 pair production in natural gaugemediated supersymmetry breaking scenarios where the neutralino (χ 01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G ) via the χ 01 → Z G process.

AB - A search is presented for direct top squark pair production using events with at least two leptons including a same-flavour opposite-sign pair with invariant mass consistent with the Z boson mass, jets tagged as originating from b-quarks and missing transverse momentum. The analysis is performed with proton–proton collision data at √s = 8 TeV collected with the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of 20.3 fb−1. No excess beyond the Standard Model expectation is observed. Interpretations of the results are provided in models based on the direct pair production of the heavier top squark state (t2) followed by the decay to the lighter top squark state (t1) via t2 → Zt1, and for t1 pair production in natural gaugemediated supersymmetry breaking scenarios where the neutralino (χ 01) is the next-to-lightest supersymmetric particle and decays producing a Z boson and a gravitino (G ) via the χ 01 → Z G process.

U2 - 10.1140/epjc/s10052-014-2883-6

DO - 10.1140/epjc/s10052-014-2883-6

M3 - Journal article

SN - 1434-6044

VL - 74

JO - The European Physical Journal C: Particles and Fields

JF - The European Physical Journal C: Particles and Fields

M1 - 2883

ER -

Search for direct top squark pair production in events with a Z boson, b-jets and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

Abstract

Adgang til dokumentet

Fingeraftryk

Citationsformater