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Measurement of the CP-violation parameter of B-0 mixing and decay with p(p)over-bar ->mu mu X data
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Number of Authors: 581
2006 (English)In: Physical Review D, ISSN 1550-7998, Vol. 74, no 9, 092001- p.Article in journal (Refereed) Published
Abstract [en]

We measure the dimuon charge asymmetry A in p (p) over bar collisions at a center of mass energy root s=1960 GeV. The data was recorded with the D0 detector and corresponds to an integrated luminosity of approximately 1.0 fb(-1). Assuming that the asymmetry A is due to asymmetric B-0 <->(B) over bar (0) mixing and decay, we extract the CP-violation parameter of B-0 mixing and decay: ((epsilon B0))/(1+vertical bar epsilon B0 vertical bar 2)=(AB0)/(4)= -0.0023 +/- 0.0011(stat)+/- 0.0008(syst).A(B)(0) is the dimuon charge asymmetry from decays of B-0(B) over bar (0) pairs. The general case, with CP violation in both B-0 and B-s(0) systems, is also considered. Finally we obtain the forward-backward asymmetry that quantifies the tendency of mu(+) to go in the proton direction and mu(-) to go in the antiproton direction. The results are consistent with the standard model and constrain new physics.

Place, publisher, year, edition, pages
2006. Vol. 74, no 9, 092001- p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-37424DOI: 10.1103/PhysRevD.74.092001ISI: 000242409700006ScopusID: 2-s2.0-33750986190OAI: diva2:433857
QC 20110811. Antal författare: 581.Available from: 2011-08-11 Created: 2011-08-11 Last updated: 2012-02-03Bibliographically approved

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Gollub, NilsHansson, PerStrandberg, Jonas
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