J. Bastos
Fundação para a Ciência e Tecnologia
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Publication
Featured researches published by J. Bastos.
Physical Review D | 2006
I. Abt; A. Abyzov; Mark Raymond Adams; H. Albrecht; Vasco Amaral; A. Amorim; S. Aplin; Alexey Vladimirovich Arefiev; M. Atiya; V. Aushev; Yu. Sh. Bagaturia; R. Baghshetsyan; V. Balagura; M. Bargiotti; S. Barsuk; O. Barsukova; V. Bassetti; J. Bastos; C. Bauer; S. Bauer; M. Beck; A. Belkov; I. Belotelov; I. Belyaev; K. Berkhan; A. Bertin; B. Bobchenko; A. Bogatyrev; G. Bohm; C. Borgmeier
A new measurement of the b-bbar production cross section in 920 GeV proton-nucleus collisions is presented by the HERA-B collaboration. The b-bbar production is tagged via inclusive bottom quark decays into J/psi mesons, by exploiting the longitudinal separation of J/psi->ll decay vertices from the primary proton-nucleus interaction point. Both e+e- and mu+mu- channels are reconstructed, for a total of 83 +- 12 inclusive b->J/psi X events found. The combined analysis yields a b-bbar to prompt J/psi cross section ratio of
Physical Review D | 2009
I. Abt; M. Adams; M. Agari; H. Albrecht; A. Aleksandrov; Vasco Amaral; A. Amorim; S. Aplin; V. Aushev; Yu. Sh. Bagaturia; V. Balagura; M. Bargiotti; O. Barsukova; J. Bastos; J. Batista; C. Bauer; Th. Bauer; A. Belkov; Ar. Beikov; I. Belotelov; A. Bertin; B. Bobchenko; M. Böcker; A. Bogatyrev; G. Bohm; M. Bräuer; M. Bruinsma; M. Bruschi; P. Buchholz; T. Buran
{\frac{{\Delta\sigma(bbbar)}}{{\Delta\sigma_{\jpsi}}}} = 0.032\pm 0.005 \stat \pm 0.004 \sys
