Title
Measurement of <tex>$B\bar{B}$</tex> angular correlations based on secondary vertex reconstruction at <tex>$\sqrt{s}$</tex> = 7 TeV Measurement of <tex>$B\bar{B}$</tex> angular correlations based on secondary vertex reconstruction at <tex>$\sqrt{s}$</tex> = 7 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol ,
Subject
Physics
Source (journal)
Journal of high energy physics. - Bristol
Volume/pages
(2011) :3 , p. 1-35
ISSN
1126-6708
1029-8479
Article Reference
136
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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 primary-interaction 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.
E-info
https://repository.uantwerpen.be/docman/iruaauth/284fd1/021ece435d2.pdf
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