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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/23995
Title: 
Lifetime difference and CP-violating phase in the B-s(0) system
Author(s): 
Institution: 
  • 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
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  • Joint Nucl Res Inst
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  • Inst High Energy Phys
  • Petersburg Nucl Phys Inst
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  • Royal Inst Technol
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  • Univ London Imperial Coll Sci Technol & Med
  • University of Manchester
  • University of Arizona
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  • University of California, Riverside (UCR)
  • Florida State University
  • Fermilab Natl Accelerator Lab
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ISSN: 
0031-9007
Abstract: 
From an analysis of the decay B-s(0)-> J/psi phi, we obtain the width difference between the light and heavy mass eigenstates Delta Gamma equivalent to(Gamma(L)-Gamma(H))=0.17 +/- 0.09(stat)+/- 0.02(syst) ps(-1) and the CP-violating phase phi(s)=-0.79 +/- 0.56(stat)(-0.01)(+0.14)(syst). Under the hypothesis of no CP violation (phi(s)equivalent to 0), we obtain 1/Gamma=tau/(B-s(0))=1.52 +/- 0.08(stat)(-0.03)(+0.01)(syst) ps and Delta Gamma=0.12(-0.10)(+0.08)(stat)+/- 0.02(syst) ps(-1). The data sample corresponds to an integrated luminosity of about 1.1 fb(-1) accumulated with the D0 detector at the Fermilab Tevatron collider. This is the first direct measurement of the CP-violating mixing phase in the B-s(0) system.
Issue Date: 
23-Mar-2007
Citation: 
Physical Review Letters. College Pk: Amer Physical Soc, v. 98, n. 12, 7 p., 2007.
Time Duration: 
7
Publisher: 
Amer Physical Soc
Source: 
http://dx.doi.org/10.1103/PhysRevLett.98.121801
URI: 
http://hdl.handle.net/11449/23995
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/23995
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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