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Measurement of BB¯ angular correlations based on secondary vertex reconstruction at vs = 7 TeV

Abstract: A measurement of the angular correlations between beauty and anti-beauty hadrons (BB) produced in pp collisions at a centre-of-mass energy of 7 TeV at the CERN LHC is presented, probing for the first time the region of small angular separation. The B hadrons are identified by the presence of displaced secondary vertices from their decays. The B hadron angular separation is reconstructed from the decay vertices and the primaryinteraction vertex. The differential BB production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 pb?1, shows that a sizable fraction of the BB pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of bb production.

 Autoría: Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hänsel S., Hartl C., Hoch M., Hörmann N., Hrubec J., Jeitler M., Kasieczka G., Kiesenhofer W., Krammer M., Liko D., Mikulec I., Pernicka M., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Sh

 Fuente: Journal of High Energy Physics, 2011, 2011(3), 136

 Editorial: Springer Verlag

 Fecha de publicación: 01/03/2011

 Nº de páginas: 35

 Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP03(2011)136

 ISSN: 1126-6708,1029-8479

 Url de la publicación: https://doi.org/10.1007/JHEP03(2011)136

Autoría

KHACHATRYAN, V.

JAVIER ANDRES BROCHERO CIFUENTES

MARIA CHAMIZO LLATAS

SHANHUEI CHUANG

MARTA FELCINI

MARCOS FERNANDEZ GARCIA

PATRICIA LOBELLE PARDO

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

MARIA DEL MAR SOBRON SAÑUDO