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 ffiffiffi s p ¼ 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.

Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., et al. (2014). Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at s =8TeV with the ATLAS detector. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90(1), 012004-1-012004-21 [10.1103/PhysRevD.90.012004].

Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at s =8TeV with the ATLAS detector

BELLAGAMBA, LORENZO;BRUNI, ALESSIA;BRUNI, GRAZIANO;DE CASTRO, STEFANO;FABBRI, LAURA;FRANCHINI, MATTEO;GABRIELLI, ALESSANDRO;GIACOBBE, BENEDETTO;GIORGI, FILIPPO MARIA;MENGARELLI, ALBERTO;PICCININI, MAURIZIO;RINALDI, LORENZO;ROMANO, MARINO;SBARRA, CARLA;SEMPRINI CESARI, NICOLA;SPIGHI, ROBERTO;VALENTINETTI, SARA;VILLA, MAURO;Vivarelli, I.;ZOCCOLI, ANTONIO;
2014

Abstract

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 ffiffiffi s p ¼ 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.
2014
Aad, G., Abajyan, T., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., et al. (2014). Search for dark matter in events with a Z boson and missing transverse momentum in pp collisions at s =8TeV with the ATLAS detector. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90(1), 012004-1-012004-21 [10.1103/PhysRevD.90.012004].
Aad, G.; Abajyan, T.; Abbott, B.; Abdallah, J.; Abdel Khalek, S.; Abdinov, O.; Aben, R.; Abi, B.; Abolins, M.; Abouzeid, O.S.; Abramowicz, H.; Abreu, ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/520894
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