2016DSpace@MIT (Massachusetts Institute of Technology)Open access

Measurement of the Difference of Time-Integrated CP Asymmetries in D[superscript 0] → K[superscript −]K[superscript +] and D[superscript 0] → π[superscript −]π[superscript +] Decays

R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Álvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, G. Andreassi, M. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, P. d’Argent, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, V. Batozskaya, V. Battista, A. Bay, L. Beaucourt, J. Beddow, F. Bedeschi, I. Bediaga, L. J. Bel, V. Bellee, N. Belloli, I. Belyaev, E. Ben-Haim, G. Bencivenni, S. Benson, J. Benton, A. Berezhnoy, R. Bernet, A. Bertolin, F. Betti, M.-O. Bettler, M. van Beuzekom, S. Bifani, P. Billoir, T. Bird, A. Birnkraut, A. Bizzeti, T. Blake, F. Blanc, J. Blouw, S. Blusk, V. Bocci, A. Bondar, N. Bondar, W. Bonivento, A. Borgheresi, S. Borghi, M. Borisyak, M. Borsato, T. J. V. Bowcock, E. 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Karbach, S. Karodia, M. Kecke, M. Kelsey, I. R. Kenyon, M. Kenzie, T. Ketel, E. Khairullin, B. Khanji, C. Khurewathanakul, T. Kirn, S. Klaver, K. Klimaszewski, O. Kochebina, M. Kolpin, I. Komarov, R. F. Koopman, P. Koppenburg, M. Kozeiha, L. Kravchuk, K. Kreplin, M. Kreps, P. Krokovny, F. Kruse, W. Krzemien, W. Kucewicz, M. Kucharczyk, V. Kudryavtsev, A. K. Kuonen, K. Kurek, T. Kvaratskheliya, D. Lacarrère, G. Lafferty, A. Lai, D. Lambert, G. Lanfranchi, C. Langenbruch, B. Langhans, T. Latham, C. Lazzeroni, R. Le Gac, J. van Leerdam, J.-P. Lees, R. Lefèvre, A. Leflat, J. Lefrançois, E. Lemos Cid, O. Leroy, T. Lesiak, B. Leverington, Y. Li, T. Likhomanenko, M. Liles, R. Lindner, C. Linn, F. Lionetto, B. Liu, X. Liu, D. Loh, I. Longstaff, J. H. Lopes, D. Lucchesi, M. Lucio Martínez, H. Luo, A. Lupato, E. Luppi, O. Lupton, A. Lusiani, F. Machefert, F. Maciuc, O. Maev, K. Maguire, S. Malde, A. Malinin, G. Manca, G. Mancinelli, P. Manning, A. Mapelli, J. Maratas, J. F. Marchand, U. 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Wilkinson, M. Wilkinson, M. Williams, M. P. Williams, M. Williams, F. F. Wilson, J. Wimberley, J. Wishahi, W. Wislicki, M. Witek, G. Wormser, S. A. Wotton, K. Wraight, S. Wright, K. Wyllie, Y. Xie, Z. Xu, Z. Yang, J. Yu, X. Yuan, O. Yushchenko, M. Zangoli, M. Zavertyaev, L. Zhang, Y. Zhang, A. Zhelezov, A. Zhokhov, L. Zhong, V. Zhukov, S. Zucchelli, P. Ilten, Michael Williams

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Abstract

A search for CP violation in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb[superscript -1], collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D[superscript *+] → D[superscript 0]π[superscript +] and D[superscript *-] → [bar over D][superscript 0]π[superscript -] decays. The difference between the CP asymmetries in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays, ΔA[subscript CP] ≡ A[subscript CP](K[superscript -]K[superscript +]) - A[subscript CP](π[superscript -]π[superscript +]), is measured to be [-0.10 ± 0.08(stat) ± 0.03(syst)]%. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.

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A search for CP violation in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb[superscript -1], collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D[superscript *+] → D[superscript 0]π[superscript +] and D[superscript *-] → [bar over D][superscript 0]π[superscript -] decays. The difference between the CP asymmetries in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays, ΔA[subscript CP] ≡ A[subscript CP](K[superscript -]K[superscript +]) - A[subscript CP](π[superscript -]π[superscript +]), is measured to be [-0.10 ± 0.08(stat) ± 0.03(syst)]%. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.

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Available abstract

A search for CP violation in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays is performed using pp collision data, corresponding to an integrated luminosity of 3 fb[superscript -1], collected using the LHCb detector at center-of-mass energies of 7 and 8 TeV. The flavor of the charm meson is inferred from the charge of the pion in D[superscript *+] → D[superscript 0]π[superscript +] and D[superscript *-] → [bar over D][superscript 0]π[superscript -] decays. The difference between the CP asymmetries in D[superscript 0] → K[superscript -]K[superscript +] and D[superscript 0] → π[superscript -]π[superscript +] decays, ΔA[subscript CP] ≡ A[subscript CP](K[superscript -]K[superscript +]) - A[subscript CP](π[superscript -]π[superscript +]), is measured to be [-0.10 ± 0.08(stat) ± 0.03(syst)]%. This is the most precise measurement of a time-integrated CP asymmetry in the charm sector from a single experiment.

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Measurement of the Difference of Time-Integrated CP Asymmetries in D[superscript 0] → K[superscript −]K[superscript +] and D[superscript 0] → π[superscript −]π[superscript +] Decays — Research Paper | ScholarLens