par Khachatryan, Vardan;Charaf, Othman 
;Clerbaux, Barbara ;De Lentdecker, Gilles ;Dero, Vincent ;Gay, Arnaud ;Hammad, Grégory ;Hreus, Tomas ;Marage, Pierre ;Thomas, Laurent ;Vanlaer, Pascal ;Vander Velde, Catherine ;Wickens, John H. ; [et al.]
Référence The Journal of high energy physics, 2011, 3, 136
Publication Publié, 2011
;Clerbaux, Barbara ;De Lentdecker, Gilles ;Dero, Vincent ;Gay, Arnaud ;Hammad, Grégory ;Hreus, Tomas ;Marage, Pierre ;Thomas, Laurent ;Vanlaer, Pascal ;Vander Velde, Catherine ;Wickens, John H. ; [et al.]Référence The Journal of high energy physics, 2011, 3, 136
Publication Publié, 2011
Article révisé par les pairs
| Résumé : | A measurement of the angular correlations between beauty and anti-beauty hadrons (BB̄) 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 BB̄ 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 BB̄ pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of bb̄ production. |
