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Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV $\mathit{pp}$ collisions at the LHC using the ATLAS detector
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Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV $\mathit{pp}$ collisions at the LHC using the ATLAS detector
Bibliographic description
| title: | Search for nonpointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV $\mathit{pp}$ collisions at the LHC using the ATLAS detector |
| author: | Pałka Marek 
|
| contributor: | Współautorami artykułu są członkowie ATLAS Collaboration w liczbie 2890 |
| institution: | ATLAS Collaboration |
| journal title: | Physical Review. D, Particles, Fields, Gravitation, and Cosmology |
| volume: | 90 |
| issue: | 11 |
| date of publication : | 2014 |
| article ID: | 112005 |
| ISSN: |
1550-7998 |
| eISSN: |
1550-2368 |
| DOI: | |
| language: | English |
| journal language: | English |
| abstract in English: | 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. |
| number of pulisher's sheets: | 2 |
| affiliation: | Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego |
| type: | journal article |
| subtype: | academic paper |
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Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 3.0
Projekt „Repozytorium otwartego dostępu do dorobku naukowego i dydaktycznego UJ” współfinansowany w ramach poddziałania 2.3.1 „Cyfrowe udostępnianie zasobów nauki” Programu Operacyjnego Polska Cyfrowa z Europejskiego Funduszu Rozwoju Regionalnego i budżetu państwa na podstawie umowy o dofinansowanie nr POPC.02.03.01-00-0030/17-00
