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Upsilon production cross section in pp collisions at √s=7 TeV

CMS Collaboration, Vardan Khachatryan, Pierluigi Bortignon, Lea Caminada, Zhiling Chen, Sergio Cittolin, Günther Dissertori, Michael Dittmar, Jürg Eugster, Klaus Freudenreich, Christoph Grab, Alain Hervé (+30 others)
2011

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The Çð1SÞ, Çð2SÞ, and Çð3SÞ production cross sections in proton-proton collisions at ffiffi ffi s p ¼ 7 TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3:1 AE 0:3 pb À1 . Integrated over the rapidity range jyj < 2, we find the product of the Çð1SÞ production cross section and branching fraction to dimuons to be ðpp ! Çð1SÞXÞ Á BðÇð1SÞ ! þ À Þ ¼ 7:37 AE 0:13 þ0:61 À0:42 AE 0:81 nb, where the first uncertainty is
more » ... ical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Çð1SÞ production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Çð1SÞ, Çð2SÞ, and Çð3SÞ differential cross sections as a function of transverse momentum and rapidity.
doi:10.3929/ethz-b-000038001 fatcat:opifzyc4mre7dmsiw4plwldcfi
Citation

CMS Collaboration, Vardan Khachatryan, Pierluigi Bortignon, Lea Caminada, Zhiling Chen, Sergio Cittolin, Günther Dissertori, Michael Dittmar, Jürg Eugster, Klaus Freudenreich, Christoph Grab, Alain Hervé, Wieland Hintz, Pierre Lecomte, Werner Lustermann, Carmelo Marchica, Pablo Martinez Ruiz Del Arbol, Paolo Meridiani, Predrag Milenovic, Filip Moortgat, Pascal Nef, Francesca Nessi-Tedaldi, Luc Pape, Felicitas Pauss, Thomas Punz, Andrea Rizzi, Frédéric J. Ronga, Marco Rossini, Leonardo Sala, Ann-Karin Sanchez, Marie-Christine Sawley, Benjamin Stieger, Ludwig Tauscher, Alessandro Thea, Konstantinos Theofilatos, Daniel Treille, Christina Urscheler, Rainer Wallny, M. Weber, Lukas Wehrli, J. Weng, Et Al.. "Upsilon production cross section in pp collisions at √s=7 TeV." (2011)