Search for $CP$ violation using $T$-odd correlations in $D^0 \to K^+K^-π^+π^-$ decays
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Adeva, B.
name: Adinolfi, M.
name: Affolder, A.
name: Ajaltouni, Z.
name: Akar, S.
name: Albrecht, J.
name: Alessio, F.
name: Alexander, M.
name: Ali, S.
name: Alkhazov, G.
name: Cartelle, P. Alvarez
name: Alves, A. A.
name: Amato, S.
name: Amerio, S.
name: Amhis, Y.
name: An, L.
name: Anderlini, L.
name: Anderson, J.
name: Andreassen, R.
name: Andreotti, M.
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name: Appleby, R. B.
name: Gutierrez, O. Aquines
name: Archilli, F.
name: Artamonov, A.
name: Artuso, M.
name: Aslanides, E.
name: Auriemma, G.
name: Baalouch, M.
name: Bachmann, S.
name: Back, J. J.
name: Badalov, A.
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name: Batozskaya, V.
name: Battista, V.
name: Bay, A.
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name: Bettler, M. -O.
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name: Bjørnstad, P. M.
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name: Blusk, S.
name: Bocci, V.
name: Bondar, A.
name: Bondar, N.
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name: Borgia, A.
name: Borsato, M.
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name: Bozzi, C.
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name: Britsch, M.
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name: Calvi, M.
name: Gomez, M. Calvo
name: Campana, P.
name: Perez, D. Campora
name: Carbone, A.
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name: Akiba, K. Carvalho
name: Casse, G.
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name: Cauet, Ch.
name: Cenci, R.
name: Charles, M.
name: Charpentier, Ph.
name: Chefdeville, M.
name: Chen, S.
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name: Chrzaszcz, M.
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Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A search for $CP$ violation using $T$-odd correlations is performed using the four-body $D^0 \to K^+K^-π^+π^-$ decay, selected from semileptonic $B$ decays. The data sample corresponds to integrated luminosities of $1.0\,\text{fb}^{-1}$ and $2.0\,\text{fb}^{-1}$ recorded at the centre-of-mass energies of 7 TeV and 8 TeV, respectively. The $CP$-violating asymmetry $a_{CP}^{T\text{-odd}}$ is measured to be $(0.18\pm 0.29\text{(stat)}\pm 0.04\text{(syst)})\%$. Searches for $CP$ violation in different regions of phase space of the four-body decay, and as a function of the $D^0$ decay time, are also presented. No significant deviation from the $CP$ conservation hypothesis is found.
description: 23 pages including author list, 5 figures