Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/43816
Título: | A search for an excited muon decaying to a muon and two jets in pp collisions at √ s = 8 TeV with the ATLAS detector |
Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
Palavras-chave: | excited leptons lepton compositeness leptoquarks |
Data: | 2016 |
Editora: | IOP Publishing |
Revista: | New Journal of Physics |
Citação: | Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., Aben, R., . . . Zwalinski, L. (2016). A search for an excited muon decaying to a muon and two jets in pp collisions at √ s = 8 TeV with the ATLAS detector. [Article]. New Journal of Physics, 18(7). doi: 10.1088/1367-2630/18/7/073021 |
Resumo(s): | A new search signature for excited leptons is explored. Excited muons are sought in the channel ${pp}\to \mu {\mu }^{* }\to \mu \mu \ {\rm{jet}}\;{\rm{jet}}$, 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 $\sqrt{s}\;=\;8\;{\rm{TeV}}$ 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 $\sigma B({\mu }^{* }\to \mu q\bar{q}$) is between 0.6 and 1 fb. Limits on $\sigma B$ are converted to lower bounds on the compositeness scale Λ. In the limiting case ${\rm{\Lambda }}={m}_{{\mu }^{* }}$, 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 }^{* }\to \mu \gamma $. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/43816 |
DOI: | 10.1088/1367-2630/18/7/073021 |
ISSN: | 0370-2693 |
e-ISSN: | 1873-2445 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Aad_2016_New_J._Phys._18_073021.pdf | 1,23 MB | Adobe PDF | Ver/Abrir |