Measurement of the production cross section for Z gamma-GT nu (nu) over-bar gamma in pp collisions at root s= 7 TeV and limits on ZZ gamma and Z gamma gamma triple gauge boson …
Yazarlar (6)
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Journal of High Energy Physics (Q1) | ||
| Makale Dili | – | Basım Tarihi | 01-2013 |
| Cilt / Sayı / Sayfa | 0 / 10 / – | DOI | – |
| Makale Linki | https://scholarship.miami.edu/esploro/outputs/journalArticle/Measurement-of-the-production-cross-section/991031739778002976 | ||
| UAK Araştırma Alanları |
Nükleer Fizik
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| Özet |
| A measurement of the Z gamma-> nu (nu) over bar gamma cross section in pp collisions at root s= 7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 fb (-1) collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range vertical bar eta vertical bar< 1.4 with transverse energy above 145 GeV. The Z gamma-> nu<(nu) over bar> gamma production cross section is measured to be 21.1+/-4.2 (stat.)+/-4.3 (syst.)+/-0.5 (lum.) fb, which agrees with the standard model prediction of 21.9+/-1.1 fb. The results are combined with the CMS measurement of Z gamma production in the l (+) l (-) gamma final state (where l is an electron or a muon) to yield the most stringent limits to date on triple gauge boson couplings. vertical bar h (3)(Z) vertical bar< 2.7 x 10 (-3), vertical bar h (4)(Z) vertical bar< 1.3 x 10 (-5) for ZZ gamma and vertical bar h (3)(gamma) vertical bar< 2.9 x 10 (-3), vertical bar h (4)(gamma) vertical bar< 1.5 x 10 (-5) for Z gamma gamma couplings. |
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