Observation of Z decays to four leptons with the CMS detector at the LHC
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| Makale Türü |
Özgün Makale
(SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
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| Dergi Adı | Journal of High Energy Physics (Q1) | ||
| Dergi ISSN | 1029-8479 Dergi Bilgileri (2012) | ||
| Makale Dili | – | Basım Tarihi | 01-2012 |
| Kabul Tarihi | 19-11-2012 | Yayınlanma Tarihi | 01-12-2012 |
| Cilt / Sayı / Sayfa | 2012 / 12 / 1–28 | DOI | 10.1007/JHEP12(2012)034 |
| Makale Linki | https://link.springer.com/article/10.1007/JHEP12(2012)034 | ||
| UAK Araştırma Alanları |
Nükleer Fizik
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| Özet |
| The first observation of the Z boson decaying to four leptons in proton-proton collisions is presented. The analyzed data set corresponds to an integrated luminosity of 5.02 fb− 1 at TeV collected by the CMS detector at the Large Hadron Collider. A pronounced resonance peak, with a statistical significance of 9.7 σ, is observed in the distribution of the invariant mass of four leptons (electrons and/or muons) with mass and width consistent with expectations for Z boson decays. The branching fraction and cross section reported here are defined by phase space restrictions on the leptons, namely, 80< m 4ℓ< 100 GeV, where m 4ℓ is the invariant mass of the four leptons, and m ℓℓ> 4 GeV for all pairs of leptons, where m ℓℓ is the two-lepton invariant mass. The measured branching fraction is\(\mathcal {B}\left ({Z\to 4\ell}\right)=\left ({4.2 _ {-0.8}^{+ 0.9}\left ({\mathrm {stat}.}\right)\pm 0.2\left ({\mathrm {syst}.}\right)}\right … |
| Anahtar Kelimeler |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| Google Scholar | 180 |