002691104 001__ 2691104
002691104 005__ 20190930231618.0
002691104 0248_ $$aoai:cds.cern.ch:2691104$$pcerncds:FULLTEXT
002691104 037__ $$aATL-PHYS-SLIDE-2019-704
002691104 041__ $$aeng
002691104 088__ $$9ATL-COM-PHYS-2019-1197
002691104 100__ $$0AUTHOR|(INSPIRE)INSPIRE-00152949$$0AUTHOR|(SzGeCERN)496845$$aAssamagan, [email protected]$$uBrookhaven National Laboratory (BNL)
002691104 110__ $$aThe ATLAS collaboration
002691104 245__ $$aSearch for Dark Sector States at the LHC
002691104 260__ $$c2019
002691104 269__ $$aGeneva$$bCERN$$c30 Sep 2019
002691104 300__ $$a33 p
002691104 520__ $$aHidden sector or dark sector states appear in many extensions to the Standard Model, to provide a particle candidate for dark matter in universe or to explain astrophysical observations such the as positron excess observed in the cosmic radiation flux. A hidden or dark sector can be introduced with an additional U(1)d dark gauge symmetry. The discovery of the Higgs boson during Run 1 of the Large Hadron Collider opens a new and rich experimental program based on the Higgs Portal. This discovery route uses couplings to the dark sector at the Higgs level, which were not experimentally accessible before. These searches use the possible exotic decays: H \to Z Zd \to 4l and H \to Zd Zd \to 4l. Here Zd is a dark vector boson. We have experience of this search from the Run 1 period of the LHC using the ATLAS detector at CERN. These results showed a few events where none was expected. The Run 1 analysis for 8 TeV collision energy is further developed in Run 2 with 13 TeV collision energy, to expand the search area, take advantage of higher statistics, a higher Higgs production cross section, and substantially better performance of the ATLAS detector. The analysis is extended to search for heavier scalars decaying to dark vector bosons.
002691104 594__ $$aSLIDE
002691104 595__ $$aCERN CDS-Invenio WebSubmit
002691104 65017 $$2SzGeCERN$$aParticle Physics - Experiment
002691104 65027 $$2SzGeCERN$$aPhysics
002691104 690C_ $$aCERN
002691104 690C_ $$aINTNOTE
002691104 690C_ $$aPRIVATLAS
002691104 690C_ $$aPUBLATLASSLIDE
002691104 693__ $$aCERN LHC$$eATLAS
002691104 710__ $$5PH-EP
002691104 710__ $$gATLAS Collaboration
002691104 8564_ $$uhttps://cds.cern.ch/record/2689908$$yOriginal Communication (restricted to ATLAS)
002691104 859__ [email protected]
002691104 8564_ $$81520205$$s16148650$$uhttps://cds.cern.ch/record/2691104/files/ATL-PHYS-SLIDE-2019-704.pdf
002691104 916__ $$sn$$w201970
002691104 960__ $$a91
002691104 963__ $$aPUBLIC
002691104 970__ $$a000766769CER
002691104 980__ $$aPUBLATLASSLIDE
002691104 980__ $$aSlides