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Search for direct third-generation squark pair production in finalstates with missing transverse momentum and two b-jets in root s=8 TeV pp collisions with the ATLAS detector
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
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2013 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, no 10, 189- p.Article in journal (Refereed) Published
Abstract [en]

The results of a search for pair production of supersymmetric partners of the Standard Model third-generation quarks are reported. This search uses 20.1 fb(-1) of pp collisions at root s = 8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The lightest bottom and top squarks ((b) over tilde (1) and (t) over tilde (1) respectively) are searched for in a final statewith large missing transverse momentum and two jets identified as originating from b-quarks. No excess of events above the expected level of Standard Model background is found. The results are used to set upper limits on the visible cross section for processes beyond the Standard Model. Exclusion limits at the 95% confidence level on the masses of the third-generationsquarks are derived in phenomenological supersymmetric R-parity-conserving models in which either the bottom or the top squark is the lightest squark. The (b) over tilde (1) is assumed to decay via (b) over tilde (1) -> b (chi) over tilde (0)(1) and the (t) over tilde (1) via (t) over tilde (1) b (chi) over tilde (+/-)(1), with undetectable products of the subsequent decay of the (chi) over tilde (+/-)(1) due to the small mass splitting between the (chi) over tilde (+/-)(1) and the (chi) over tilde (0)(1)

Place, publisher, year, edition, pages
2013. no 10, 189- p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-212375DOI: 10.1007/JHEP10(2013)189ISI: 000326296900004OAI: oai:DiVA.org:uu-212375DiVA: diva2:677421
Note

ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1007/JHEP10(2013)189.

Available from: 2013-12-09 Created: 2013-12-09 Last updated: 2017-12-06Bibliographically approved

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Brenner, RichardBuszello, Claus PConiavitis, EliasEkelöf, TordEllert, MattiasFerrari, ArnaudIsaksson, CharlieMadsen, AlexanderPelikan, Daniel

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