Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at √s = 8TeV with the ATLAS detector

Article, Preprint, Unknown English OPEN
Aad, G. ; Abbott, B. ; Abdallah, J. ; Abdel Khalek, S. ; Abdinov, O. ; Aben, R. ; Abi, B. ; Abolins, M. ; AbouZeid, O. S. ; Abramowicz, H. ; Abreu, H. ; Abreu, R. ; Abulaiti, Y. ; Acharya, B. S. ; Adamczyk, L. ; Adams, D. L. ; Adelman, J. ; Adomeit, Stefanie ; Adye, T. ; Agatonovic-Jovin, T. ; Aguilar-Saavedra, J. A. ; Agustoni, M. ; Ahlen, S. P. ; Ahmad, A. ; Ahmadov, F. ; Aielli, G. ; Zurzolo, G. ; Zutshi, V. ; Zwalinski, L. (2014)
  • Publisher: Ludwig-Maximilians-Universität München
  • Journal: (issn: 1126-6708, vol: 2,014, pp: 141)
  • Related identifiers: doi: 10.7892/boris.68712, doi: 10.1007/JHEP05(2014)071, doi: 10.1103/PhysRevD.90.012004, doi: 10.7892/boris.68715, doi: 10.1103/PhysRevD.90.012004., doi: 10.1103/PhysRevD.90.012004
  • Subject: Supersymmetry | scale [mass] | info:eu-repo/classification/arxiv/Computer Science::Digital Libraries | ATLAS | info:eu-repo/classification/arxiv/Computer Science::Mathematical Software | scalar particle | Constraints | effective field theory | Z boson; pp collisions; ATLAS detector | QC | Physical Sciences | interaction [dark matter] | direct production [slepton] | info:eu-repo/classification/arxiv/Statistics::Machine Learning | High Energy Physics - Experiment | Settore FIS/04 - Fisica Nucleare e Subnucleare | missing-energy [transverse momentum] | Supersymmetry; Hadron-Hadron Scattering | 8000 GeV-cms | Physik | hadron-hadron scattering; supersymmetry; nuclear and high energy physics | Hadron-Hadron Scattering | :Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 [VDP] | contact interaction | Science & Technology | Settore FIS/01 - Fisica Sperimentale | scattering [p p] | final state [dilepton] | leptonic decay [Z0] | Particle Physics - Experiment | pair production [sparticle] | associated production [Z0] | mass: lower limit [sparticle] | 530 | info:eu-repo/classification/arxiv/Computer Science::Machine Learning | info:eu-repo/classification/ddc/ddc:530 | CERN LHC Coll | minimal supersymmetric standard model | mediation | Nuclear and High Energy Physics | direct production [chargino] | experimental results | LHC | QC0170 | search for [dark matter] | direct production [neutralino] | Fysik | :Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 [VDP] | 530 Physics | electroweak interaction
    • ddc: ddc:500.2 | ddc:530
    arxiv: Computer Science::Digital Libraries | Computer Science::Mathematical Software | Computer Science::Machine Learning | Statistics::Machine Learning

A search is presented for production of dark matter particles recoiling against a leptonically decaying $Z$ boson in 20.3 fb$^{-1}$ of $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and two oppositely-charged electrons or muons consistent with the decay of a $Z$ boson are analyzed. No excess above the Standard Model prediction is observed. Limits are set on the mass scale of the contact interaction as a function of the dark matter particle mass using an effective field theory description of the interaction of dark matter with quarks or with $Z$ bosons. Limits are also set on the coupling and mediator mass of a model in which the interaction is mediated by a scalar particle. A search is presented for production of dark matter particles recoiling against a leptonically decaying Z boson in 20.3 fb$^{-1}$ of pp collisions at $\sqrt{s}$=8 TeV with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and two oppositely-charged electrons or muons consistent with the decay of a Z boson are analyzed. No excess above the Standard Model prediction is observed. Limits are set on the mass scale of the contact interaction as a function of the dark matter particle mass using an effective field theory description of the interaction of dark matter with quarks or with Z bosons. Limits are also set on the coupling and mediator mass of a model in which the interaction is mediated by a scalar particle. <p>A search is presented for production of dark-matter particles recoiling against a leptonically decaying <inline-formula><mml:math display="inline"><mml:mi>Z</mml:mi></mml:math></inline-formula> boson in <inline-formula><mml:math display="inline"><mml:mrow><mml:mn>20.3</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:msup><mml:mrow><mml:mi>fb</mml:mi></mml:mrow><mml:mrow><mml:mo>-</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula> of <inline-formula><mml:math display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math></inline-formula> collisions at <inline-formula><mml:math display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>8</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math></inline-formula> with the ATLAS detector at the Large Hadron Collider. Events with large missing transverse momentum and two oppositely charged electrons or muons consistent with the decay of a <inline-formula><mml:math display="inline"><mml:mi>Z</mml:mi></mml:math></inline-formula> boson are analyzed. No excess above the Standard Model prediction is observed. Limits are set on the mass scale of the contact interaction as a function of the dark-matter particle mass using an effective field theory description of the interaction of dark matter with quarks or with <inline-formula><mml:math display="inline"><mml:mi>Z</mml:mi></mml:math></inline-formula> bosons. Limits are also set on the coupling and mediator mass of a model in which the interaction is mediated by a scalar particle.</p>