@Article{LHCbCollaborationAaij_etal2019,
author="LHCb Collaboration (Aaij, R. et al
and Garcia Martin, L. M.
and Henry, L.
and Jashal, B. K.
and Martinez-Vidal, F.
and Oyanguren, A.
and Remon Alepuz, C.
and Ruiz Vidal, J.
and Sanchez Mayordomo, C.",
title="Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates",
journal="Physical Review Letters",
year="2019",
publisher="Amer Physical Soc",
volume="122",
number="23",
pages="231802 - 10pp",
abstract="We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use 2.3 x 10(6) D-0 -> K-S(0)pi(+)pi(-) decays reconstructed in proton-proton collisions collected by the LHCb experiment in 2011 and 2012. Allowing for CP violation in mixing and in the interference between mixing and decay, we measure the CP-averaged normalized mass difference x(cp)= [2.7 +/- 1.6(stat) +/- 0.4(syst)] x 10(-3) and the CP-violating parameter Delta x = [-0.53 +/- 0.70(stat) +/- 0.22(syst)] x 10(-3). The results are consistent with CP symmetry. These determinations are the most precise from a single experiment and, combined with current world-average results, yield the fast evidence that the masses of the neutral charm-meson eigenstates differ.",
optnote="WOS:000471988900004",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4061), last updated on Wed, 03 Jul 2019 12:33:37 +0000",
issn="0031-9007",
doi="10.1103/PhysRevLett.122.231802",
opturl="https://arxiv.org/abs/1903.03074",
opturl="https://doi.org/10.1103/PhysRevLett.122.231802",
language="English"
}