Khachatryan, V. ; Sirunyan, A. M. ; Tumasyan, A. ; Adam, W. ; Bergauer, T. ; Dragicevic, M. ; Mondal, N. K. ; Fabjan, C. ; Friedl, M. ; et, al. (2011) Measurement of BB̅ angular correlations based on secondary vertex reconstruction at √s=7 TeV Journal of High Energy Physics, 2011 (3). p. 136. ISSN 1126-6708
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Official URL: http://www.springerlink.com/content/97304432884702...
Related URL: http://dx.doi.org/10.1007/JHEP03(2011)136
Abstract
A measurement of the angular correlations between beauty and anti-beauty hadrons ( BB̅) 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 BB̅ 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 BB̅ pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of bb̅production.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| Keywords: | Hadron-Hadron Scattering |
| ID Code: | 89965 |
| Deposited On: | 04 May 2012 05:10 |
| Last Modified: | 04 May 2012 05:10 |
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