Combined Search For Electroweak Production Of Charginos And Neutralinos İn Proton-Proton Collisions At S?=13s=13TeV

Bilki, Burak; ., ve diger

Combined Search For Electroweak Production Of Charginos And Neutralinos İn Proton-Proton Collisions At S?=13s=13TeV

dc.authorid	249433	en_US
dc.contributor.author	Bilki, Burak
dc.contributor.author	., ve diger
dc.date.accessioned	2019-03-28T13:25:06Z
dc.date.available	2019-03-28T13:25:06Z
dc.date.issued	2018
dc.department	İstanbul Beykent Üniversitesi	en_US
dc.description.abstract	A statistical combination of several searches for the electroweak production of charginos and neutralinos is presented. All searches use proton-proton collision data at s?=13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb?1. In addition to the combination of previous searches, a targeted analysis requiring three or more charged leptons (electrons or muons) is presented, focusing on the challenging scenario in which the difference in mass between the two least massive neutralinos is approximately equal to the mass of the Z boson. The results are interpreted in simplified models of chargino-neutralino or neutralino pair production. For chargino-neutralino production, in the case when the lightest neutralino is massless, the combination yields an observed (expected) limit at the 95% confidence level on the chargino mass of up to 650 (570) GeV, improving upon the individual analysis limits by up to 40 GeV. If the mass difference between the two least massive neutralinos is approximately equal to the mass of the Z boson in the chargino-neutralino model, the targeted search requiring three or more leptons obtains observed and expected exclusion limits of around 225 GeV on the second neutralino mass and 125 GeV on the lightest neutralino mass, improving the observed limit by about 60 GeV in both masses compared to the previous CMS result. In the neutralino pair production model, the combined observed (expected) exclusion limit on the neutralino mass extends up to 650–750 (550–750) GeV, depending on the branching fraction assumed. This extends the observed exclusion achieved in the individual analyses by up to 200 GeV. The combined result additionally excludes some intermediate gaps in the mass coverage of the individual analyses.	en_US
dc.identifier.doi	10.1007/JHEP03(2018)160
dc.identifier.issn	1029-8479
dc.identifier.scopus	2-s2.0-85045087730	en_US
dc.identifier.scopusquality	Q2	en_US
dc.identifier.uri	https://doi.org/10.1007/JHEP03(2018)160
dc.identifier.wos	WOS:000429614600001	en_US
dc.identifier.wosquality	Q1	en_US
dc.indekslendigikaynak	Web of Science	en_US
dc.indekslendigikaynak	Scopus	en_US
dc.language.iso	en	en_US
dc.publisher	Springer Link	tr_TR
dc.relation.publicationcategory	Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı	en_US
dc.subject	Hadron-Hadron scattering	tr_TR
dc.subject	Supersymmetry	tr_TR
dc.title	Combined Search For Electroweak Production Of Charginos And Neutralinos İn Proton-Proton Collisions At S?=13s=13TeV	en_US
dc.type	Article	en_US