Measurement of the total cross section from elastic scattering in pp collisions at s√=8 TeV with the ATLAS detector

A measurement of the total pp cross section at the LHC at √ s = 8 TeV is presented. An integrated luminosity of 500 µb −1 was accumulated in a special run with high-β ? beam optics to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable t. The mea...

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Detalhes bibliográficos
Autores: Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, Maria Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Wahlberg, Hernan Pablo, Bossio Sola, Jonathan David, Marceca, Gino, Otero y Garzon, Gustavo Javier, Piegaia, Ricardo Nestor, Sacerdoti, Sabrina, Zibell. A., Zieminska, D., Zimine, N. I., Zimmermann, C., Zimmermann, S., Zinonos, Z., Zinser, M., Ziolkowski, M., Živković, L., Zobernig, G., Zoccoli, A., Nedden, M. zur, Zurzolo, G., Zwalinski, L., The ATLAS Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:Argentina
Recursos:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/70689
Acesso em linha:http://hdl.handle.net/11336/70689
Access Level:acceso abierto
Palavra-chave:Proton
Cross-section
ATLAS
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
Descrição
Resumo:A measurement of the total pp cross section at the LHC at √ s = 8 TeV is presented. An integrated luminosity of 500 µb −1 was accumulated in a special run with high-β ? beam optics to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable t. The measurement is performed with the ALFA sub-detector of ATLAS. Using a fit to the differential elastic cross section in the −t range from 0.014 GeV2 to 0.1 GeV2 to extrapolate t → 0, the total cross section, σtot(pp → X), is measured via the optical theorem to be σtot(pp → X) = 96.07 ± 0.18 (stat.) ± 0.85 (exp.) ± 0.31 (extr.) mb , where the first error is statistical, the second accounts for all experimental systematic uncertainties and the last is related to uncertainties in the extrapolation t → 0. In addition, the slope of the exponential function describing the elastic cross section at small t is determined to be B = 19.74 ± 0.05 (stat.) ± 0.23 (syst.) GeV−2 .

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