Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector
This Letter reports the observation of a high transverse momentum <i>Z → b ̄b</i> signal in proton–proton collisions at √s = 8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integra...
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| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2014
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79673 |
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I19-R120-10915-79673 |
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dspace |
| institution |
Universidad Nacional de La Plata |
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I-19 |
| repository_str |
R-120 |
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SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física la̵rge hadron collider Boosted b ̄ b topologies proton-proton collisions ATLAS detector |
| spellingShingle |
Ciencias Exactas Física la̵rge hadron collider Boosted b ̄ b topologies proton-proton collisions ATLAS detector Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. Wahlberg, Hernán Pablo The ATLAS Collaboration Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
| topic_facet |
Ciencias Exactas Física la̵rge hadron collider Boosted b ̄ b topologies proton-proton collisions ATLAS detector |
| description |
This Letter reports the observation of a high transverse momentum <i>Z → b ̄b</i> signal in proton–proton collisions at √s = 8 TeV and the measurement of its production cross section. The data analysed were collected in 2012 with the ATLAS detector at the LHC and correspond to an integrated luminosity of 19.5 fb<sup>−1</sup>. The <i>Z → b ̄b</i> decay is reconstructed from a pair of b-tagged jets, clustered with the anti-kt jet algorithm with R = 0.4, that have low angular separation and form a dijet with p<sub>T</sub> > 200 GeV. The signal yield is extracted from a fit to the dijet invariant mass distribution, with the dominant, multi-jet background mass shape estimated by employing a fully data-driven technique that reduces the dependence of the analysis on simulation. The fiducial cross section is determined to be σ<sup>fid</sup><sub><i>Z → b ̄b</i></sub> = 2.02 ± 0.20 (stat.) ± 0.25 (syst.) ± 0.06 (lumi.) pb = 2.02 ± 0.33 pb, in good agreement with next-to-leading-order theoretical predictions. |
| format |
Articulo Articulo |
| author |
Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_facet |
Alconada Verzini, María Josefina Alonso, Francisco Anduaga, Xabier Sebastián Dova, María Teresa Monticelli, Fernando Gabriel Tripiana, Martín F. Wahlberg, Hernán Pablo The ATLAS Collaboration |
| author_sort |
Alconada Verzini, María Josefina |
| title |
Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
| title_short |
Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
| title_full |
Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
| title_fullStr |
Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
| title_full_unstemmed |
Measurement of the cross section of high transverse momentum <i>Z → b ̄b</i> production in proton–proton collisions at √s = 8 TeV with the ATLAS detector |
| title_sort |
measurement of the cross section of high transverse momentum <i>z → b ̄b</i> production in proton–proton collisions at √s = 8 tev with the atlas detector |
| publishDate |
2014 |
| url |
http://sedici.unlp.edu.ar/handle/10915/79673 |
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