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Título : Study of Z Boson Production in PbPb Collisions at √sNN=2.76  TeV
Autor : Chatrchyan, S., Brochero Cifuentes, J. A., Cabrillo, I. J., Calderón, A., Chamizo Llatas, M., Chuang, S. H., Duarte Campderros, J., Felcini, M., Fernández, M., Gómez, G., González Sánchez, J., Jorda, C., Lobelle Pardo, P., López Virto, A., Marco, Jesús, Marco, Rafael, Martínez-Rivero, Celso, Matorras, Francisco, Piedra, Jonatan, Muñoz Sánchez, F. J., Rodrigo, Teresa, Rodriguez Marrero, Ana Y., Ruiz Jimeno, Alberto, Scodellaro, Luca, Sobron Sañudo, M., Vilar, Rocío, Vila, Iván
Fecha de publicación : May-2011
Editor: American Physical Society
Citación : Physical Review Letters 106(21): 212301 (2011)
Resumen: A search for Z bosons in the μ+μ- decay channel has been performed in PbPb collisions at √sNN=2.76  TeV with the CMS detector at the LHC, in a 7.2  μb-1 data sample. The number of opposite-sign muon pairs observed in the 60–120  GeV/c2 invariant mass range is 39, corresponding to a yield per unit of rapidity (y) and per minimum bias event of [33.8±5.5(stat)±4.4(syst)]×10-8, in the |y|<2.0 range. Rapidity, transverse momentum, and centrality dependencies are also measured. The results agree with next-to-leading order QCD calculations, scaled by the number of incoherent nucleon-nucleon collisions.
Descripción : 14 páginas, 1 tabla, 2 figuras.-- PACS numbers: 25.75.Cj, 12.38.Bx, 14.70.Hp.-- Creative Commons Attribution 3.0 License.-- CMS Collaboration: et al.
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ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.106.212301
Citación : Physical Review Letters 106(21): 212301 (2011)
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