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Lifetime difference and CP-violating phase in the B-s(0) system
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2007 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 98, no 12, 121801-1-121801-7 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2007. Vol. 98, no 12, 121801-1-121801-7 p.
Keyword [en]
Colliding beam accelerators, Detectors, Eigenvalues and eigenfunctions, Luminance, Bs0 system, CP-violating mixing phase, Fermilab Tevatron colliders
National Category
Subatomic Physics
URN: urn:nbn:se:kth:diva-35522DOI: 10.1103/PhysRevLett.98.121801ISI: 000245135400012ScopusID: 2-s2.0-33947496436OAI: diva2:428942
QC 20110701Available from: 2011-07-01 Created: 2011-07-01 Last updated: 2012-02-02Bibliographically approved

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Clément, ChristopheGollub, NilsHansson, PerStrandberg, Jonas
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