Updated determination of D 0 - D 0 mixing and C P violation parameters with D 0 → K + π -

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Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Ali, S et al (show 90 more authors) , Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, D'Argent, P, Arnau Romeu, J, Artamonov, A, Artuso, M, Aslanides, E, Atzeni, M, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, BacK, JJ, Badalov, A, Baesso, C, Baker, S, Balagura, V, Baldini, W, Baranov, A, Barlow, RJ, Barschel, C, BarsuK, S, Barter, W, Baryshnikov, F, Batozskaya, V, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Beiter, A, Bel, LJ, Beliy, N, Bellee, V, Belloli, N, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, BeraneK, S, Berezhnoy, A, Bernet, R, Berninghoff, D, Bertholet, E, Bertolin, A, Betancourt, C, Betti, F, Bettler, MO, Van Beuzekom, M, Bezshyiko, I, Bifani, S, Billoir, P, Birnkraut, A, Bizzeti, A, Bjørn, M, Blake, T, Blanc, F, BlusK, S, Bocci, V, Boettcher, T, Bondar, A, Bondar, N, Bordyuzhin, I, Borghi, S, BorisyaK, M, Borsato, M, Bossu, F, Boubdir, M, BowcocK, TJV ORCID: 0000-0002-3505-6915, Bowen, E, Bozzi, C, Braun, S, Brodzicka, J, Brundu, D, Buchanan, E, Burr, C and Bursche, A (2018) Updated determination of D 0 - D 0 mixing and C P violation parameters with D 0 → K + π - Physical Review D, 97 (3). 031101-. ISSN 2470-0010, 2470-0029

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Abstract

We report measurements of charm-mixing parameters based on the decay-time-dependent ratio of D0→K+π- to D0→K-π+ rates. The analysis uses a data sample of proton-proton collisions corresponding to an integrated luminosity of 5.0 fb-1 recorded by the LHCb experiment from 2011 through 2016. Assuming charge-parity (CP) symmetry, the mixing parameters are determined to be x′2=(3.9±2.7)×10-5, y′=(5.28±0.52)×10-3, and RD=(3.454±0.031)×10-3. Without this assumption, the measurement is performed separately for D0 and D0 mesons, yielding a direct CP-violating asymmetry AD=(-0.1±9.1)×10-3, and magnitude of the ratio of mixing parameters 1.00<|q/p|<1.35 at the 68.3% confidence level. All results include statistical and systematic uncertainties and improve significantly upon previous single-measurement determinations. No evidence for CP violation in charm mixing is observed.

Item Type:	Article
Additional Information:	All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-046.html
Uncontrolled Keywords:	hep-ex, hep-ex
Depositing User:	Symplectic Admin
Date Deposited:	23 Apr 2018 07:48
Last Modified:	22 Jan 2026 07:52
DOI:	10.1103/PhysRevD.97.031101
Open Access URL:	https://doi.org/10.1103/PhysRevD.97.031101
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3020508
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