Measurement of B(B)over-bar angular correlations based on secondary vertex reconstruction at root s=7 TeV

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Abstract

A measurement of the angular correlations between beauty and anti-beauty hadrons (B (B) over 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) over bar 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 B (B) over bar pairs are produced with small opening angles. These studies provide a test of QCD and further insight into the dynamics of b (b) over bar production.

Autore Pugliese

Tutti gli autori

  • POMPILI A.;MARANGELLI B.;CALABRIA C.;SELVAGGI G.;LUSITO L.;BARBONE L.;ABBRESCIA M.;DE PALMA M.;PACIFICO N.;MY S.;NUZZO S.V.

Titolo volume/Rivista

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Anno di pubblicazione

2011

ISSN

1029-8479

ISBN

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Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

38

Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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