Search for excited leptons in pp collisions at $sqrt{s} = 7$ TeV

Pramana

on behalf of the CMS Collaboration¹  Shilpi Jain1² 

[1] $$;Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700 064, India$$

关键词: Large Hadron Collider;    compact muon solenoid;    compositeness;    excited leptons;    contact interaction.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A search for excited leptons, carried out with the CMS detector in 𝑝𝑝 collision at the LHC with $sqrt{s} = 7$ TeV, is presented. The search has been performed for an associated production of a lepton and an oppositely charged excited lepton $pp → ll^{*}$, followed by the decay $l^{*} → l𝛾$ , resulting in $ll𝛾$ final state, where $l = e,𝜇$. No excess above the Standard Model expectation is observed in the data. Interpreting the findings in the context of $l^{∗}$ production through four-fermion contact interactions and $l^{∗}$ decay via electroweak processes, upper limits are reported for $l^{∗}$ production at this collision energy and the exclusion region in the $𝛬 - M(l^{*})$ parameter space is extended beyond the previously established limits.

【 授权许可】

Unknown