Measurement of the semileptonic charge asymmetry in B0 meson mixing with the D0 detector
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
26/10/2012
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Resumo |
We present a measurement of the semileptonic mixing asymmetry for B0 mesons, asld, using two independent decay channels: B0→μ +D -X, with D -→K +π -π -; and B0→μ +D *-X, with D * -→D ̄0π -, D ̄0→ K +π - (and charge conjugate processes). We use a data sample corresponding to 10.4fb -1 of pp̄ collisions at √s=1.96TeV, collected with the D0 experiment at the Fermilab Tevatron collider. We extract the charge asymmetries in these two channels as a function of the visible proper decay length of the B0 meson, correct for detector-related asymmetries using data-driven methods, and account for dilution from charge-symmetric processes using Monte Carlo simulation. The final measurement combines four signal visible proper decay length regions for each channel, yielding asld=[0.68±0.45(stat)±0.14(syst)]%. This is the single most precise measurement of this parameter, with uncertainties smaller than the current world average of B factory measurements. © 2012 American Physical Society. |
Identificador |
http://dx.doi.org/10.1103/PhysRevD.86.072009 Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 86, n. 7, 2012. 1550-7998 1550-2368 http://hdl.handle.net/11449/73678 10.1103/PhysRevD.86.072009 2-s2.0-84868018747 2-s2.0-84868018747.pdf |
Idioma(s) |
eng |
Relação |
Physical Review D: Particles, Fields, Gravitation and Cosmology |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |