Search for scalar leptoquarks in pp collisions at √s = 13 TeV with the ATLAS experiment

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Search for scalar leptoquarks in pp collisions at √s = 13 TeV with the ATLAS experiment. New journal of physics, 18(9), 093016. Institute of Physics Publishing IOP 10.1088/1367-2630/18/9/093016

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An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at √s= 13 TeV at the Large Hadron Collider, have been considered. An integrated luminosity of 3.2 fb⁻¹, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 GeV and 1050 GeV (1160 GeV and 1040 GeV) for first and second generation leptoquarks, respectively, assuming a branching ratio into a charged lepton and a quark of 100%. Upper limits on the aforementioned branching ratio are also given as a function of leptoquark mass. Compared with the results of earlier ATLAS searches, the sensitivity is increased for leptoquark masses above 860 GeV, and the observed exclusion limits confirm and extend the published results.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics
500 Science > 510 Mathematics

ISSN:

1367-2630

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Annette Krebs-Wegenast

Date Deposited:

04 Aug 2017 10:29

Last Modified:

06 Aug 2017 02:17

Publisher DOI:

10.1088/1367-2630/18/9/093016

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt.

BORIS DOI:

10.7892/boris.99954

URI:

https://boris.unibe.ch/id/eprint/99954

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