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Probing Compositeness with the CMS eejj & eej Data
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics. (Theoretical high energy physics)ORCID iD: 0000-0001-7268-549X
2016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 758, 219-225 p.Article in journal (Refereed) Published
Abstract [en]

Quark-lepton compositeness is a well-known beyond the Standard Model (SM) scenario with heavy exotic particles like leptoquarks (LQs) and leptogluons (LGs) etc. These particles can couple to leptons and jets simultaneously. In this letter, we use the recent CMS scalar LQ search data in the eejj and eej channels to probe this scenario. We recast the data in terms of a color octet partner of the SM electron (or a first generation spin-1/2 LG) that couples to an electron and a gluon via a dimension five operator suppressed by the quark-lepton compositeness scale (Lambda). By combining different production processes of the color octet electron (e(8)) at the LHC, we use the CMS 8 TeV data to obtain a simultaneous bound on Lambda and the mass of the e(8) (M-e8). We also study the reach of the 13 TeV LHC to discover the e(8) and interpret the required luminosity in terms of M-e8 and Lambda.

Place, publisher, year, edition, pages
2016. Vol. 758, 219-225 p.
Keyword [en]
LHC; Compositeness scale; Leptogluon; Exclusion limits
National Category
Subatomic Physics
URN: urn:nbn:se:uu:diva-293521DOI: 10.1016/j.physletb.2016.05.020ISI: 000377330500033OAI: diva2:927912
Carl Tryggers foundation , CTS-14:206Swedish Research Council, 621-2011-5107
Available from: 2016-05-13 Created: 2016-05-13 Last updated: 2016-07-14Bibliographically approved

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Publisher's full textarXiv:1602.01273

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