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CMS-BPH-10-010 ; CERN-PH-EP-2010-093
Measurement of $ \mathrm{ B \overline{B} } $ angular correlations based on secondary vertex reconstruction at $\sqrt{s}$ = 7 TeV
CMS Collaboration
15 February 2011
J. High Energy Phys. 03 (2011) 136
Abstract: A measurement of the angular correlations between beauty and anti-beauty hadrons (B B-bar) 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 primary-interaction vertex. The differential B B-bar production cross section, measured from a data sample collected by CMS and corresponding to an integrated luminosity of 3.1 inverse picobarns, shows that a sizable fraction of the B B-bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b b-bar production.
Links: e-print arXiv:1102.3194 [hep-ex] (PDF) ; CDS record ; inSPIRE record ; Public twiki page ; HepData record ; CADI line (restricted) ;
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Compact Muon Solenoid
LHC, CERN