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Search for first generation scalar leptoquarks in pp collisions at root s=7 TeV 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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2012 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 709, no 3, 158-176 p.Article in journal (Refereed) Published
Abstract [en]

We report a search for first generation scalar leptoquarks using 1.03 fb(-1) of proton-proton collisions data produced by the Large Hadron Collider at root s = 7 TeV and recorded by the ATLAS experiment. Leptoquarks are sought via their decay into an electron or neutrino and a quark, producing events with two oppositely charged electrons and at least two jets, or events with an electron, missing transverse momentum and at least two jets. Control data samples are used to validate background predictions from Monte Carlo simulation. In the signal region, the observed event yields are consistent with the background expectations. We exclude at 95% confidence level the production of first generation scalar leptoquark with masses m(LQ) < 660 (607) GeV when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

Place, publisher, year, edition, pages
2012. Vol. 709, no 3, 158-176 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-175036DOI: 10.1016/j.physletb.2012.02.004ISI: 000301758800008OAI: oai:DiVA.org:uu-175036DiVA: diva2:529903
Note

With 3007 more authors from the ATLAS Collaboration.

Correction in Physics Letters B, vol 711, issue 5, pages 442-455.

DOI: 10.1016/j.physletb.2012.03.023

Available from: 2012-05-31 Created: 2012-05-31 Last updated: 2017-12-07Bibliographically approved

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Brenner, RichardBuszello, Claus P.Ekelöf, TordEllert, MattiasFerrari, ArnaudIsaksson, Charlie

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