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Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/23275
Título: 
Measurement of the B-s(0) lifetime in the exclusive decay channel B-s(0)-> J/psi phi
Autor(es): 
Instituição: 
  • Joint Inst Nucl Res
  • Univ Buenos Aires
  • Centro Brasileiro de Pesquisas Físicas (CBPF)
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Estadual Paulista (UNESP)
  • Univ Alberta
  • Simon Fraser Univ
  • Inst High Energy Phys
  • Universidad de los Andes
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  • CINVESTAV
  • NIKHEF H
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  • Institute for Theoretical and Experimental Physics (ITEP)
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  • Petersburg Nucl Phys Inst
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  • Royal Inst Technol
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  • Fermilab Natl Accelerator Lab
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ISSN: 
0031-9007
Resumo: 
Using the exclusive decay B-s(0)-->J/psi(mu(+)mu(-))phi(K+K-), we report the most precise single measurement of the B-s(0) lifetime. The data sample corresponds to an integrated luminosity of approximately 220 pb(-1) collected with the D0 detector at the Fermilab Tevatron Collider in 2002-2004. We reconstruct 337 signal candidates, from which we extract the B-s(0) lifetime, tau(B-s(0))=1.444(-0.090)(+0.098)(stat)+/-0.020(sys) ps. We also report a measurement for the lifetime of the B-0 meson using the exclusive decay B-0-->J/psi(mu(+)mu(-))K-*0(892)(K(+)pi(-)). We reconstruct 1370 signal candidates, obtaining tau(B-0)=1.473(-0.050)(+0.052)(stat)+/-0.023(sys) ps, and the ratio of lifetimes, tau(B-s(0))/tau(B-0)=0.980(-0.071)(+0.076)(stat)+/-0.003(sys).
Data de publicação: 
4-Fev-2005
Citação: 
Physical Review Letters. College Pk: American Physical Soc, v. 94, n. 4, 7 p., 2005.
Duração: 
7
Publicador: 
American Physical Soc
Fonte: 
http://dx.doi.org/10.1103/PhysRevLett.94.042001
Endereço permanente: 
http://hdl.handle.net/11449/23275
Direitos de acesso: 
Acesso restrito
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/23275
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