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Abstract:

A search has been performed, using the full 20.3 fb-1 data sample of 8 TeV proton-proton collisions collected in 2012 with the ATLAS detector at the LHC, for photons originating from a displaced vertex due to the decay of a neutral long-lived particle into a photon and an invisible particle. The analysis investigates the diphoton plus missing transverse momentum final state, and is therefore most sensitive to pair production of long-lived particles. The analysis technique exploits the capabilities of the ATLAS electromagnetic calorimeter to make precise measurements of the flight direction, as well as the time of flight, of photons. No excess is observed over the Standard Model predictions for background. Exclusion limits are set within the context of gauge mediated supersymmetry breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying into a photon and gravitino with a lifetime in the range from 250 ps to about 100 ns. © 2015 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the «http://creativecommons.org/licenses/by/3.0/» Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Registro:

Documento: Artículo
Título:Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector
Autor:Aad, G. et al.
Este artículo contiene 2891 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2891 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2014
Volumen:90
Número:11
DOI: http://dx.doi.org/10.1103/PhysRevD.90.112005
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
CODEN:PRVDA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n11_p_Aad

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Citas:

---------- APA ----------
(2014) . Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 90(11).
http://dx.doi.org/10.1103/PhysRevD.90.112005
---------- CHICAGO ----------
Aad, G. "Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology 90, no. 11 (2014).
http://dx.doi.org/10.1103/PhysRevD.90.112005
---------- MLA ----------
Aad, G. "Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 90, no. 11, 2014.
http://dx.doi.org/10.1103/PhysRevD.90.112005
---------- VANCOUVER ----------
Aad, G. Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV pp collisions at the LHC using the ATLAS detector. Phys Rev D Part Fields Gravit Cosmol. 2014;90(11).
http://dx.doi.org/10.1103/PhysRevD.90.112005