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A search for an excited muon decaying to a muon and two jets in pp collisions at root s=8 TeV with the ATLAS detector
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Stockholms universitet, Naturvetenskapliga fakulteten, Oskar Klein-centrum för kosmopartikelfysik (OKC).
Vise andre og tillknytning
Rekke forfattare: 28232016 (engelsk)Inngår i: New Journal of Physics, ISSN 1367-2630, E-ISSN 1367-2630, Vol. 18, artikkel-id 073021Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Anew search signature for excited leptons is explored. Excited muons are sought in the channel pp -> mu mu* -> mu mu jet jet, assuming both the production and decay occur via a contact interaction. The analysis is based on 20.3 fb(-1) of pp collision data at a centre-of-mass energy of root s = 8 TeV taken with the ATLAS detector at the large hadron collider. No evidence of excited muons is found, and limits are set at the 95% confidence level on the cross section times branching ratio as a function of the excited-muon mass m(mu)*. For m(mu)* between 1.3 and 3.0 TeV, the upper limit on sigma B(mu* -> mu q (q) over bar) is between 0.6 and 1 fb. Limits on sB are converted to lower bounds on the compositeness scale Lambda. In the limiting case Lambda = m(mu)*, excited muons with a mass below 2.8 TeV are excluded. With the same model assumptions, these limits at larger mu* masses improve upon previous limits from traditional searches based on the gauge-mediated decay mu* -> mu gamma.

sted, utgiver, år, opplag, sider
2016. Vol. 18, artikkel-id 073021
Emneord [en]
excited leptons, lepton compositeness, leptoquarks
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-134289DOI: 10.1088/1367-2630/18/7/073021ISI: 000381870700003OAI: oai:DiVA.org:su-134289DiVA, id: diva2:1033073
Tilgjengelig fra: 2016-10-05 Laget: 2016-10-03 Sist oppdatert: 2019-12-10bibliografisk kontrollert

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Abulaiti, YimingÅkerstedt, HenrikÅsman, BarbroBendtz, KatarinaBertoli, GabrieleBessidskaia Bylund, OlgaBohm, ChristianClément, ChristopheCribbs, Wayne A.Hellman, StenJon-And, KerstinKhandanyan, HovhannesKlimek, PawelLundberg, OlofMilstead, DavidMoa, TorbjörnMolander, SimonPani, PriscillaPlucinski, PawelPöttgen, RuthRossetti, ValerioShaikh, Nabila W.Shcherbakova, AnnaSilverstein, SamuelSjölin, JörgenStrandberg, SaraTylmad, MajaUghetto, MichaëlWallängen, Veronica
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