Measurement of the Z/gamma* -> tau tau cross section in pp collisions at root s=13 TeV and validation of tau lepton analysis techniques
A measurement is presented of the Z/γ ∗ → τ τ cross section in pp collisions at √s = 13 TeV, using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3 fb−1. The product of the inclusive cross section and branching fraction is measured to be σ (pp → Z/γ...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer New York LLC
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/70431/1/70431_Measurement%20of%20the%20Z%20%CE%B3_article.pdf http://irep.iium.edu.my/70431/7/70431_Measurement%20of%20the%20Z%20%CE%B3_scopus.pdf http://irep.iium.edu.my/70431/13/70431_Measurement%20of%20the%20Z%20%CE%B3_article.pdf_wos.pdf http://irep.iium.edu.my/70431/ https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-018-6146-9.pdf |
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| Summary: | A measurement is presented of the Z/γ ∗ → τ τ
cross section in pp collisions at √s = 13 TeV, using data
recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 2.3 fb−1. The product of
the inclusive cross section and branching fraction is measured to be σ (pp → Z/γ ∗+X) B(Z/γ ∗ → ττ) = 1848 ±
12 (stat) ± 67 (syst + lumi) pb, in agreement with the standard model expectation, computed at next-to-next-to-leading
order accuracy in perturbative quantum chromodynamics.
The measurement is used to validate new analysis techniques
relevant for future measurements of τ lepton production. The
measurement also provides the reconstruction efficiency and
energy scale for τ decays to hadrons + ντ final states, determined with respective relative uncertainties of 2.2 and 0.9% |
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