Measurement of <i>CP</i> asymmetry in <i>D</i><SUP>0</SUP> → <i>K</i><SUP>-</SUP> <i>K</i><SUP>+</SUP> decays

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Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrechtl, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G et al (show 757 more authors) , Cartelle, R Alvarez, Alves, AA Jr, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, d'Argent, R, Romeu, J Arnau, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baker, S, Baldini, W, Barlow, RJ, Barsche, C, Barsuk, S, Barter, W, Baszczyk, M, Batozskaya, V, Batsukh, B, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Be, LJ, Bellee, V, Belloli, N, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bertolin, A, Betti, F, Bettler, M-O, van Beuzekom, M, Bershyiko, Ia, Bifani, S, Billoir, P, Bird, T, Birnkraut, A, Bitadze, A, Bizzeti, A, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Boettcher, T, Bondar, A, Bondar, N, Bonivento, W, Borgheresi, A, Borghi, S, Borisyak, M, Borsato, M, Bossu, F, Boubdir, M, Bowcock, TJV ORCID: 0000-0002-3505-6915, Bowen, E, Bozzi, C, Braun, S, Britsch, M, Britton, T, Brodzicka, J, Buchanan, E, Burr, C, Bursche, A, Buytaert, J, Cadeddu, S, Calabrese, R, Calvi, M, Calvo Gomez, M, Camboni, A, Campana, R, Perez, D Campora, Perez, DH Campora, Capriotti, L, Carbone, A, Carboni, G, Cardinale, R, Cardini, A, Carniti, R, Carson, L, Carvalho Akiba, K, Casse, G ORCID: 0000-0002-8516-237X, Cassina, L, Garcia, L Castillo, Cattaneo, M, Cauet, Ch, Cavallero, G, Cenci, R, Charles, M, Charpentier, Ph, Chatzikonstantinidis, G, Chefdeville, M, Chen, S, Cheung, S-F, Chobanova, V, Chrzaszcz, M, Cid Vidal, X, Ciezarek, G, Clarke, PEL, Clemencic, M, Cliff, HV, Closier, J, Coco, V, Cogan, J, Cogneras, E, Cogoni, V, Cojocariu, L, Collazuol, G, Collins, P, Comerma-Montells, A, Contu, A, Cook, A, Coquereau, S, Corti, G, Corvo, M, Sobra, CM Costa, Couturier, B, Cowan, GA, Craik, DC, Crocombe, A, Cruz Torres, 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Fontanelli, F, Forshaw, DC, Forty, R, Lima, V Franco ORCID: 0000-0002-3761-209X, Frank, M, Frei, C, Fu, J, Furfaro, E, Farber, C, Gallas Torreira, A, Galli, D, Gallorini, S, Gambetta, S, Gandelman, M, Gandini, R, Gao, Y, Garcia Martin, LM, Garcia Pardinas, J, Tico, J Garra, Garrido, L, Garsed, PJ, Gascon, D, Gaspar, C, Gavardi, L, Gazzoni, G, Gerick, D, Gersabeck, E, Gersabeck, M, Gershon, T, Ghez, Ph, Giani, S, Gibson, V, Girard, OG, Giubega, L, Gizdov, K, Gligorov, VV, Golubkov, D, Golutvin, A, Gomes, A, Gorelov, IV, Gotti, C, Gandara, M Grabalosa, Graciani Diaz, R, Cardoso, LA Granado, Grauges, E, Graverini, E, Graziani, G, Grecu, A, Griffith, R, Grillo, L, Cazon, BR Gruberg, Gruenberg, O, Gushchin, E, Guz, Yu, Gys, T, Gobel, C, Hadavizadeh, T, Hadjivasiliou, C, Haefeli, G, Haen, C, Haines, SC, Hall, S, Hamilton, B, Han, X, Hansmann-Menzemer, S, Harnew, N, Harnew, ST, Harrison, J, Hatch, M, He, J, Head, T, Heister, A, Hennessy, K ORCID: 0000-0002-1529-8087, Henrard, R, Henry, L, Hernando Morata, JA, van Herwijnen, E, Hess, M, Hicheur, A, Hill, D, Hombach, C, Hopchev, H, Hulsbergen, W, Humair, T, Hushchyn, M, Hussain, N, Hutchcroft, D ORCID: 0000-0002-4174-6509, Idzik, M, Ilten, R, Jacobsson, R, Jaeger, A, Jalocha, J, Jans, E, Jawahery, A, Jiang, F, John, M, Johnson, D, Jones, CR, Joram, C, Jost, B, Jurik, N, Kandybei, S, Kanso, W, Karacson, M, Kariuki, JM, Karodia, S, Kecke, M, Kelsey, M, Kenyon, IR, Kenzie, M, Ketel, T, Khairullin, E, Khanji, B, Khurewathanakul, C, Kirn, T, Klaver, S, Klimaszewski, K, Koliiev, S, Kolpin, M, Komarov, I, Koopman, RF, Koppenburg, P, Kozachuk, A, Kozeiha, M, Kravchuk, L, Kreplin, K, Kreps, M, Krokovny, R, Kruse, F, Krzemien, W, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kuonen, AK, Kurek, K, Kvaratskheliya, T, Lacarrere, D, Lafferty, G, Lai, A, Lambert, D, Lanfranchi, G, Langenbruch, C, Latham, T, Lazzeroni, C, Le Gac, R, van Leerdam, J, Lees, J-P, Leflat, A, Lefrancois, J, Lefevre, R, Lemaitre, F, Lemos Cid, E, Leroy, O, Lesiak, T, Leverington, B, Li, Y, Likhomanenko, T, Lindner, R, Linn, C, Lionetto, F, Liu, B, Liu, X, Loh, D, Longstaff, I, Lopes, JH, Lucchesi, D, Lucio Martinez, M, Luo, H, Lupato, A, Luppi, E, Lupton, O, Lusiani, A, Lyu, X, Machefert, F, Maciuc, F, Maev, O, Maguire, K, Malde, S, Malinin, A, Maltsev, T, Manca, G, Mancinelli, G, Manning, P, Maratas, J, Marchand, JF, Marconi, U, Marin Benito, C, Marino, P, Marks, J, Martellotti, G, Martin, M, Martinelli, M, Martinez Santos, D, Martinez Vidal, F, Martins Tostes, D, Massacrier, LM, Massafferri, A, Matev, R, Mathad, A, Mathe, Z, Matteuzzi, C, Mauri, A, Maurin, B, Mazurov, A, McCann, M, McCarthy, J, McNab, A, McNulty, R, Meadows, B, Meierm, F, Meissner, M, Melnychuk, D, Merk, M, Merli, A, Michielin, E, Milanes, DA, Minard, M-N, Mitzel, DS, Mogini, A, Molina Rodriguez, J, Monroy, IA, Montei, S, Morandin, M, Morawski, P, Morda, A, Morello, MJ, Moron, J, Morris, AB, Mountain, R, Muheim, F, Mulder, M, Mussini, M, Mueller, D, Müller, J, Mueller, 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Pugatch, V, Navarro, A Puig, Punzi, G, Qian, W, Quagliani, R, Rachwal, B, Rademacker, JH, Rama, M, Pernas, M Ramos, Rangel, MS, Raniuk, I, Raven, G, Redi, F, Reichert, S, dos Reis, AC, Remon Alepuz, C, Renaudin, V, Ricciardi, S, Richards, S, Rih, M, Rinnert, K, Rives Molina, V, Robbe, P, Rodrigues, AB, Rodrigues, E, Rodriguez Lopez, JA, Perez, R Rodriguez, Rogozhnikov, A, Roiser, S, Rollings, A, Romanovskiy, V, Romero Vidal, A, Ronayne, JW, Rotondo, M, Rudolph, MS, Ruf, T, Ruiz Valls, P, Saborido Silva, JJ, Sadykhov, E, Sagidova, N, Saitta, B, Salustino Guimaraes, V, Sanchez Mayordomo, C, Sanmartin Sedes, B, Santacesaria, R, Rios, C Santamarina, Santimaria, M, Santovetti, E, Sarti, A, Satriano, C, Satta, A, Saunders, DM, Savrina, D, Schae, S, Schellenberg, M, Schiller, M, Schindler, H, Schlupp, M, Schmelling, M, Schmelzer, T, Schmidt, B, Schneider, O, Schopper, A, Schubert, K, Schubiger, M, Schune, M-H, Schwemmer, R, Sciascia, B, Sciubba, A, Semennikov, A, Sergi, A, Serra, N, Serrano, 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asymmetry in <i>D</i><SUP>0</SUP> → <i>K</i><SUP>-</SUP> <i>K</i><SUP>+</SUP> decays. PHYSICS LETTERS B, 767. pp. 177-187.

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Abstract

A measurement of the time-integrated $CP$ asymmetry in the Cabibbo-suppressed decay $D^0\rightarrow K^-K^+$ is performed using pp collision data, corresponding to an integrated luminosity of 3fb$^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. The flavour of the charm meson at production is determined from the charge of the pion in $D^{*+}\rightarrow D^0 \pi^+$ and $D^{*-}\rightarrow \bar{D^0} \pi^-$ decays. The time-integrated $CP$ asymmetry $A_{CP}(K^-K^+)$ is obtained assuming negligible $CP$ violation in charm mixing and in Cabibbo-favoured $D^0\rightarrow K^-\pi^+$, $D^+\rightarrow K^-\pi^+\pi^+$ and $D^+\rightarrow \bar{K^0}\pi^+$ decays used as calibration channels. It is found to be $A_{CP}(K^-K^+)=(0.14\pm0.15(stat)\pm0.10(syst))\%$. A combination of this result with previous LHCb measurements yields $A_{CP}(K^-K^+)=(0.04\pm0.12(stat)\pm0.10(syst))\%$, $A_{CP}(\pi^-\pi^+)=(0.07\pm0.14(stat)\pm0.11(syst))\%$. These are the most precise measurements from a single experiment. The result for $A_{CP}(K^-K^+)$ is the most precise determination of a time-integrated $CP$ asymmetry in the charm sector to date, and neither measurement shows evidence of CP asymmetry.

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-2016-035.html
Uncontrolled Keywords:	hep-ex, hep-ex
Depositing User:	Symplectic Admin
Date Deposited:	24 Feb 2017 13:47
Last Modified:	18 Oct 2023 15:45
DOI:	10.1016/j.physletb.2017.01.061
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3006049