Search for metastable heavy charged particles with large ionization energy loss in pp collisions at root s=13 TeV using the ATLAS experiment

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dc.WoS.categoriesAstronomy & Astrophysics; Physics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-11-23T13:28:40Z
dc.date.available2020-11-23T13:28:40Z
dc.date.issued2016-06-28
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractAbstract This paper presents a search for massive charged long-lived particles produced in pp collisions at root s = 13 TeV at the LHC using the ATLAS experiment. The data set used corresponds to an integrated luminosity of 3.2 fb(-1). Many extensions of the Standard Model predict the existence of massive charged long-lived particles, such as R-hadrons. These massive particles are expected to be produced with a velocity significantly below the speed of light, and therefore to have a specific ionization higher than any Standard Model particle of unit charge at high momenta. The Pixel subsystem of the ATLAS detector is used to measure the ionization energy loss of reconstructed charged particles and to search for such highly ionizing particles. The search presented here has much greater sensitivity than a similar search performed using the ATLAS detector in the root s = 8 TeV data set, thanks to the increase in expected signal cross section due to the higher center-of-mass energy of collisions, to an upgraded detector with a new silicon layer close to the interaction point, and to analysis improvements. No significant deviation from Standard Model background expectations is observed, and lifetime-dependent upper limits on R-hadron production cross sections and masses are set. Gluino R-hadrons with lifetimes above 0.4 ns and decaying to q (q) over bar plus a 100 GeV neutralino are excluded at the 95% confidence level, with lower mass limit ranging between 740 and 1590 GeV. In the case of stable R-hadrons the lower mass limit at the 95% confidence level is 1570 GeV.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1103/PhysRevD.93.112015en_US
dc.identifier.issn2470-0029
dc.identifier.issn2470-0010
dc.identifier.scopus2-s2.0-84977628776en_US
dc.identifier.urihttps://hdl.handle.net/11411/2702
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.93.112015
dc.identifier.wosWOS:000378819900002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.issue11en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors100+en_US
dc.publisherAmer. Physical Soc.en_US
dc.relation.ispartofPhysical Review Den_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSUPERSYMMETRYen_US
dc.subjectSQUARKen_US
dc.titleSearch for metastable heavy charged particles with large ionization energy loss in pp collisions at root s=13 TeV using the ATLAS experimenten_US
dc.typeArticleen_US
dc.volume93en_US

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