Repository logo
 
Publication

Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at $\sqrt{s} = 8$  TeV using the ATLAS experiment

2015-09-03Journal article Open access
Simple item page
dc.contributor.authorATLAS collaboration (2850 authors)
dc.contributor.authorAguilar-Saavedra, Juan Antonio
dc.contributor.authorAmor Dos Santos, Susana Patricia
dc.contributor.authorAnjos, Nuno
dc.contributor.authorAraque, Juan Pedro
dc.contributor.authorCantrill, Robert
dc.contributor.authorCarvalho, João
dc.contributor.authorCastro, Nuno Filipe
dc.contributor.authorConde Muiño, Patricia
dc.contributor.authorDa Cunha Sargedas De Sousa, Mario Jose
dc.contributor.authorFiolhais, Miguel
dc.contributor.authorGalhardo, Bruno
dc.contributor.authorGomes, Agostinho
dc.contributor.authorGonçalo, Ricardo
dc.contributor.authorJorge, Pedro
dc.contributor.authorLopes, Lourenco
dc.contributor.authorMachado Miguens, Joana
dc.contributor.authorMaio, Amélia
dc.contributor.authorManeira, José
dc.contributor.authorOnofre, António
dc.contributor.authorPalma, Alberto
dc.contributor.authorPedro, Rute
dc.contributor.authorPina, João Antonio
dc.contributor.authorPinto, Belmiro
dc.contributor.authorSantos, Helena
dc.contributor.authorSaraiva, João
dc.contributor.authorSilva, José
dc.contributor.authorTavares Delgado, Ademar
dc.contributor.authorVeloso, Filipe
dc.contributor.authorWolters, Helmut
dc.date.accessioned2019-02-04T07:05:56Z
dc.date.available2019-02-04T07:05:56Z
dc.date.issued2015-09-03
dc.date.updated2019-02-04T07:05:56Z
dc.description.abstractMany extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of $18.4$  fb$^{-1}$ of pp collisions at $\sqrt{s} = 8$  TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95  $\%$ confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.
dc.description.versionPeer Reviewed
dc.identifierEur.Phys.J. C75 (2015) 407; DOI 10.1140/epjc/s10052-015-3609-0
dc.identifier.urihttp://dx.doi.org/10.1140/epjc/s10052-015-3609-0
dc.identifier.urihttp://hdl.handle.net/10400.26/26860
dc.language.isoeng
dc.titleSearch for metastable heavy charged particles with large ionisation energy loss in pp collisions at $\sqrt{s} = 8$  TeV using the ATLAS experiment
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1.pdf
Size:
1.08 MB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.85 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

LIP - AP - Física de Partículas e Astropartículas