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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/23980
Title: 
Direct limits on the B-s(0) oscillation frequency
Author(s): 
Institution: 
  • Joint Inst Nucl Res Dubna
  • Univ Buenos Aires
  • LAFEX
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Estadual Paulista (UNESP)
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  • Fermilab Natl Accelerator Lab
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ISSN: 
0031-9007
Abstract: 
We report results of a study of the B-s(0) oscillation frequency using a large sample of B-s(0) semileptonic decays corresponding to approximately 1 fb(-1) of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron Collider in 2002-2006. The amplitude method gives a lower limit on the B-s(0) oscillation frequency at 14.8 ps(-1) at the 95% C.L. At Delta m(s)=19 ps(-1), the amplitude deviates from the hypothesis A=0 (1) by 2.5 (1.6) standard deviations, corresponding to a two-sided C.L. of 1% (10%). A likelihood scan over the oscillation frequency, Delta m(s), gives a most probable value of 19 ps(-1) and a range of 17 <Delta m(s)< 21 ps(-1) at the 90% C.L., assuming Gaussian uncertainties. This is the first direct two-sided bound measured by a single experiment. If Delta m(s) lies above 22 ps(-1), then the probability that it would produce a likelihood minimum similar to the one observed in the interval 16-22 ps(-1) is (5.0 +/- 0.3)%.
Issue Date: 
14-Jul-2006
Citation: 
Physical Review Letters. College Pk: Amer Physical Soc, v. 97, n. 2, 7 p., 2006.
Time Duration: 
7
Publisher: 
Amer Physical Soc
Source: 
http://dx.doi.org/10.1103/PhysRevLett.97.021802
URI: 
http://hdl.handle.net/11449/23980
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/23980
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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