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Updated measurement of decay-time-dependent $C P$ asymmetries in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays

R. Aaij²⁸, C. Abellán Beteta⁴⁶, T. Ackernley⁵⁶, B. Adeva⁴³, M. Adinolfi⁵⁰, H. Afsharnia⁶, C. A. Aidala⁷⁷, S. Aiola²², Z. Ajaltouni⁶ et al. (LHCb Collaboration)

Z. Ajaltouni⁶, S. Akar⁶¹, P. Albicocco¹⁹, J. Albrecht¹¹, F. Alessio⁴⁴, M. Alexander⁵⁵, A. Alfonso Albero⁴², G. Alkhazov³⁴, P. Alvarez Cartelle⁵⁷, A. A. Alves, Jr.⁶¹, S. Amato², Y. Amhis⁸, L. An¹⁸, L. Anderlini¹⁸, G. Andreassi⁴⁵, M. Andreotti¹⁷, F. Archilli¹³, P. d’Argent¹³, J. Arnau Romeu⁷, A. Artamonov⁴¹, M. Artuso⁶³, K. Arzymatov³⁸, E. Aslanides⁷, M. Atzeni⁴⁶, B. Audurier²³, S. Bachmann¹³, J. J. Back⁵², S. Baker⁵⁷, V. Balagura^8,b, W. Baldini^17,44, A. Baranov³⁸, R. J. Barlow⁵⁸, S. Barsuk⁸, W. Barter⁵⁷, M. Bartolini^20,44,h, F. Baryshnikov⁷⁴, G. Bassi²⁵, V. Batozskaya³², B. Batsukh⁶³, A. Battig¹¹, V. Battista⁴⁵, A. Bay⁴⁵, M. Becker¹¹, F. Bedeschi²⁵, I. Bediaga¹, A. Beiter⁶³, L. J. Bel²⁸, V. Belavin³⁸, S. Belin²³, N. Beliy⁶⁶, V. Bellee⁴⁵, K. Belous⁴¹, I. Belyaev³⁵, E. Ben-Haim⁹, G. Bencivenni¹⁹, S. Benson²⁸, S. Beranek¹⁰, A. Berezhnoy³⁶, R. Bernet⁴⁶, D. Berninghoff¹³, H. C. Bernstein⁶³, E. Bertholet⁹, A. Bertolin²⁴, C. Betancourt⁴⁶, F. Betti^16,e, M. O. Bettler⁵¹, M. van Beuzekom²⁸, Ia. Bezshyiko⁴⁶, S. Bhasin⁵⁰, J. Bhom³⁰, M. S. Bieker¹¹, S. Bifani⁴⁹, P. Billoir⁹, A. Bizzeti^18,u, M. Bjørn⁵⁹, M. P. Blago⁴⁴, T. Blake⁵², F. Blanc⁴⁵, S. Blusk⁶³, D. Bobulska⁵⁵, V. Bocci²⁷, O. Boente Garcia⁴³, T. Boettcher⁶⁰, A. Boldyrev³⁹, A. Bondar^40,x, N. Bondar³⁴, S. Borghi^58,44, M. Borisyak³⁸, M. Borsato¹³, J. T. Borsuk³⁰, T. J. V. Bowcock⁵⁶, C. Bozzi¹⁷, S. Braun¹³, A. Brea Rodriguez⁴³, M. Brodski⁴⁴, J. Brodzicka³⁰, A. Brossa Gonzalo⁵², D. Brundu²³, E. Buchanan⁵⁰, A. Buonaura⁴⁶, C. Burr⁴⁴, A. Bursche²³, J. S. Butter²⁸, J. Buytaert⁴⁴, W. Byczynski⁴⁴, S. Cadeddu²³, H. Cai⁶⁸, R. Calabrese^17,g, L. Calero Diaz¹⁹, S. Cali¹⁹, R. Calladine⁴⁹, M. Calvi^21,i, M. Calvo Gomez^42,m, A. Camboni⁴², P. Campana¹⁹, D. H. Campora Perez⁴⁴, L. Capriotti^16,e, A. Carbone^16,e, G. Carboni²⁶, R. Cardinale^20,h, A. Cardini²³, P. Carniti^21,i, K. Carvalho Akiba²⁸, A. Casais Vidal⁴³, G. Casse⁵⁶, M. Cattaneo⁴⁴, G. Cavallero⁴⁴, R. Cenci^25,p, J. Cerasoli⁷, M. G. Chapman⁵⁰, M. Charles^9,44, Ph. Charpentier⁴⁴, G. Chatzikonstantinidis⁴⁹, M. Chefdeville⁵, V. Chekalina³⁸, C. Chen³, S. Chen²³, A. Chernov³⁰, S.-G. Chitic⁴⁴, V. Chobanova⁴³, M. Chrzaszcz⁴⁴, A. Chubykin³⁴, P. Ciambrone¹⁹, M. F. Cicala⁵², X. Cid Vidal⁴³, G. Ciezarek⁴⁴, F. Cindolo¹⁶, P. E. L. Clarke⁵⁴, M. Clemencic⁴⁴, H. V. Cliff⁵¹, J. Closier⁴⁴, J. L. Cobbledick⁵⁸, V. Coco⁴⁴, J. A. B. Coelho⁸, J. Cogan⁷, E. Cogneras⁶, L. Cojocariu³³, P. Collins⁴⁴, T. Colombo⁴⁴, A. Comerma-Montells¹³, A. Contu²³, N. Cooke⁴⁹, G. Coombs⁵⁵, S. Coquereau⁴², G. Corti⁴⁴, C. M. Costa Sobral⁵², B. Couturier⁴⁴, D. C. Craik⁶⁰, J. Crkovska⁷⁸, A. Crocombe⁵², M. Cruz Torres¹, R. Currie⁵⁴, C. D’Ambrosio⁴⁴, C. L. Da Silva⁷⁸, E. Dall’Occo²⁸, J. Dalseno^43,50, A. Danilina³⁵, A. Davis⁵⁸, O. De Aguiar Francisco⁴⁴, K. De Bruyn⁴⁴, S. De Capua⁵⁸, M. De Cian⁴⁵, J. M. De Miranda¹, L. De Paula², M. De Serio^15,d, P. De Simone¹⁹, C. T. Dean⁷⁸, W. Dean⁷⁷, D. Decamp⁵, L. Del Buono⁹, B. Delaney⁵¹, H.-P. Dembinski¹², M. Demmer¹¹, A. Dendek³¹, V. Denysenko⁴⁶, D. Derkach³⁹, O. Deschamps⁶, F. Desse⁸, F. Dettori²³, B. Dey⁶⁹, A. Di Canto⁴⁴, P. Di Nezza¹⁹, S. Didenko⁷⁴, H. Dijkstra⁴⁴, F. Dordei²³, M. Dorigo^25,y, L. Douglas⁵⁵, A. Dovbnya⁴⁷, K. Dreimanis⁵⁶, M. W. Dudek³⁰, L. Dufour⁴⁴, G. Dujany⁹, P. Durante⁴⁴, J. M. Durham⁷⁸, D. Dutta⁵⁸, R. Dzhelyadin^41,†, M. Dziewiecki¹³, A. Dziurda³⁰, A. Dzyuba³⁴, S. Easo⁵³, U. Egede⁵⁷, V. Egorychev³⁵, S. Eidelman^40,x, S. Eisenhardt⁵⁴, S. Ek-In⁴⁵, R. Ekelhof¹¹, L. Eklund⁵⁵, S. Ely⁶³, A. Ene³³, S. Escher¹⁰, S. Esen²⁸, T. Evans⁴⁴, A. Falabella¹⁶, J. Fan³, N. Farley⁴⁹, S. Farry⁵⁶, D. Fazzini⁸, P. Fernandez Declara⁴⁴, A. Fernandez Prieto⁴³, F. Ferrari^16,e, L. Ferreira Lopes⁴⁵, F. Ferreira Rodrigues², S. Ferreres Sole²⁸, M. Ferrillo⁴⁶, M. Ferro-Luzzi⁴⁴, S. Filippov³⁷, R. A. Fini¹⁵, M. Fiorini^17,g, M. Firlej³¹, K. M. Fischer⁵⁹, C. Fitzpatrick⁴⁴, T. Fiutowski³¹, F. Fleuret^8,b, M. Fontana⁴⁴, F. Fontanelli^20,h, R. Forty⁴⁴, V. Franco Lima⁵⁶, M. Franco Sevilla⁶², M. Frank⁴⁴, C. Frei⁴⁴, D. A. Friday⁵⁵, J. Fu^22,q, M. Fuehring¹¹, W. Funk⁴⁴, M. Féo⁴⁴, E. Gabriel⁵⁴, A. Gallas Torreira⁴³, D. Galli^16,e, S. Gallorini²⁴, S. Gambetta⁵⁴, Y. Gan³, M. Gandelman², P. Gandini²², Y. Gao³, L. M. Garcia Martin⁷⁶, B. Garcia Plana⁴³, F. A. Garcia Rosales⁸, J. García Pardiñas⁴⁶, J. Garra Tico⁵¹, L. Garrido⁴², D. Gascon⁴², C. Gaspar⁴⁴, D. Gerick¹³, E. Gersabeck⁵⁸, M. Gersabeck⁵⁸, T. Gershon⁵², D. Gerstel⁷, Ph. Ghez⁵, V. Gibson⁵¹, A. Gioventù⁴³, O. G. Girard⁴⁵, P. Gironella Gironell⁴², L. Giubega³³, C. Giugliano¹⁷, K. Gizdov⁵⁴, V. V. Gligorov⁹, D. Golubkov³⁵, A. Golutvin^57,74, A. Gomes^1,a, P. Gorbounov^35,4, I. V. Gorelov³⁶, C. Gotti^21,i, E. Govorkova²⁸, J. P. Grabowski¹³, R. Graciani Diaz⁴², T. Grammatico⁹, L. A. Granado Cardoso⁴⁴, E. Graugés⁴², E. Graverini⁴⁵, G. Graziani¹⁸, A. Grecu³³, R. Greim²⁸, P. Griffith¹⁷, L. Grillo⁵⁸, L. Gruber⁴⁴, B. R. Gruberg Cazon⁵⁹, C. Gu³, X. Guo⁶⁷, E. Gushchin³⁷, A. Guth¹⁰, Yu. Guz^41,44, T. Gys⁴⁴, C. Göbel⁶⁵, T. Hadavizadeh⁵⁹, G. Haefeli⁴⁵, C. Haen⁴⁴, S. C. Haines⁵¹, P. M. Hamilton⁶², Q. Han⁶⁹, X. Han¹³, T. H. Hancock⁵⁹, S. Hansmann-Menzemer¹³, N. Harnew⁵⁹, T. Harrison⁵⁶, R. Hart²⁸, C. Hasse⁴⁴, M. Hatch⁴⁴, J. He⁶⁶, M. Hecker⁵⁷, K. Heijhoff²⁸, K. Heinicke¹¹, A. Heister¹¹, A. M. Hennequin⁴⁴, K. Hennessy⁵⁶, L. Henry⁷⁶, E. van Herwijnen⁴⁴, J. Heuel¹⁰, A. Hicheur⁶⁴, R. Hidalgo Charman⁵⁸, D. Hill⁵⁹, M. Hilton⁵⁸, P. H. Hopchev⁴⁵, J. Hu¹³, W. Hu⁶⁹, W. Huang⁶⁶, W. Hulsbergen²⁸, T. Humair⁵⁷, R. J. Hunter⁵², M. Hushchyn³⁹, D. Hutchcroft⁵⁶, D. Hynds²⁸, P. Ibis¹¹, M. Idzik³¹, P. Ilten⁴⁹, A. Inglessi³⁴, A. Inyakin⁴¹, K. Ivshin³⁴, R. Jacobsson⁴⁴, S. Jakobsen⁴⁴, J. Jalocha⁵⁹, E. Jans²⁸, B. K. Jashal⁷⁶, A. Jawahery⁶², V. Jevtic¹¹, F. Jiang³, M. John⁵⁹, D. Johnson⁴⁴, C. R. Jones⁵¹, B. Jost⁴⁴, N. Jurik⁵⁹, S. Kandybei⁴⁷, M. Karacson⁴⁴, J. M. Kariuki⁵⁰, N. Kazeev³⁹, M. Kecke¹³, F. Keizer⁵¹, M. Kelsey⁶³, M. Kenzie⁵¹, T. Ketel²⁹, B. Khanji⁴⁴, A. Kharisova⁷⁵, K. E. Kim⁶³, T. Kirn¹⁰, V. S. Kirsebom⁴⁵, S. Klaver¹⁹, K. Klimaszewski³², S. Koliiev⁴⁸, A. Kondybayeva⁷⁴, A. Konoplyannikov³⁵, P. Kopciewicz³¹, R. Kopecna¹³, P. Koppenburg²⁸, I. Kostiuk^28,48, O. Kot⁴⁸, S. Kotriakhova³⁴, L. Kravchuk³⁷, R. D. Krawczyk⁴⁴, M. Kreps⁵², F. Kress⁵⁷, S. Kretzschmar¹⁰, P. Krokovny^40,x, W. Krupa³¹, W. Krzemien³², W. Kucewicz^30,l, M. Kucharczyk³⁰, V. Kudryavtsev^40,x, H. S. Kuindersma²⁸, G. J. Kunde⁷⁸, A. K. Kuonen⁴⁵, T. Kvaratskheliya³⁵, D. Lacarrere⁴⁴, G. Lafferty⁵⁸, A. Lai²³, D. Lancierini⁴⁶, J. J. Lane⁵⁸, G. Lanfranchi¹⁹, C. Langenbruch¹⁰, T. Latham⁵², F. Lazzari^25,v, C. Lazzeroni⁴⁹, R. Le Gac⁷, A. Leflat³⁶, R. Lefèvre⁶, F. Lemaitre⁴⁴, O. Leroy⁷, T. Lesiak³⁰, B. Leverington¹³, H. Li⁶⁷, X. Li⁷⁸, Y. Li⁴, Z. Li⁶³, X. Liang⁶³, R. Lindner⁴⁴, P. Ling⁶⁷, F. Lionetto⁴⁶, V. Lisovskyi⁸, G. Liu⁶⁷, X. Liu³, D. Loh⁵², A. Loi²³, J. Lomba Castro⁴³, I. Longstaff⁵⁵, J. H. Lopes², G. Loustau⁴⁶, G. H. Lovell⁵¹, Y. Lu⁴, D. Lucchesi^24,o, M. Lucio Martinez²⁸, Y. Luo³, A. Lupato²⁴, E. Luppi^17,g, O. Lupton⁵², A. Lusiani²⁵, X. Lyu⁶⁶, R. Ma⁶⁷, S. Maccolini^16,e, F. Machefert⁸, F. Maciuc³³, V. Macko⁴⁵, P. Mackowiak¹¹, S. Maddrell-Mander⁵⁰, L. R. Madhan Mohan⁵⁰, O. Maev^34,44, A. Maevskiy³⁹, K. Maguire⁵⁸, D. Maisuzenko³⁴, M. W. Majewski³¹, S. Malde⁵⁹, B. Malecki⁴⁴, A. Malinin⁷³, T. Maltsev^40,x, H. Malygina¹³, G. Manca^23,f, G. Mancinelli⁷, R. Manera Escalero⁴², D. Manuzzi^16,e, D. Marangotto^22,q, J. Maratas^6,w, J. F. Marchand⁵, U. Marconi¹⁶, S. Mariani¹⁸, C. Marin Benito⁸, M. Marinangeli⁴⁵, P. Marino⁴⁵, J. Marks¹³, P. J. Marshall⁵⁶, G. Martellotti²⁷, L. Martinazzoli⁴⁴, M. Martinelli²¹, D. Martinez Santos⁴³, F. Martinez Vidal⁷⁶, A. Massafferri¹, M. Materok¹⁰, R. Matev⁴⁴, A. Mathad⁴⁶, Z. Mathe⁴⁴, V. Matiunin³⁵, C. Matteuzzi²¹, K. R. Mattioli⁷⁷, A. Mauri⁴⁶, E. Maurice^8,b, M. McCann^57,44, L. Mcconnell¹⁴, A. McNab⁵⁸, R. McNulty¹⁴, J. V. Mead⁵⁶, B. Meadows⁶¹, C. Meaux⁷, G. Meier¹¹, N. Meinert⁷¹, D. Melnychuk³², S. Meloni^21,i, M. Merk²⁸, A. Merli²², M. Mikhasenko⁴⁴, D. A. Milanes⁷⁰, E. Millard⁵², M.-N. Minard⁵, O. Mineev³⁵, L. Minzoni^17,g, S. E. Mitchell⁵⁴, B. Mitreska⁵⁸, D. S. Mitzel ⁴⁴, A. Mogini⁹, R. D. Moise⁵⁷, T. Mombächer¹¹, I. A. Monroy⁷⁰, S. Monteil⁶, M. Morandin²⁴, G. Morello¹⁹, M. J. Morello^25,t, J. Moron³¹, A. B. Morris⁷, A. G. Morris⁵², R. Mountain⁶³, H. Mu³, F. Muheim⁵⁴, M. Mukherjee⁶⁹, M. Mulder²⁸, C. H. Murphy⁵⁹, D. Murray⁵⁸, P. Muzzetto²³, A. Mödden¹¹, D. Müller⁴⁴, K. Müller⁴⁶, V. Müller¹¹, P. Naik⁵⁰, T. Nakada⁴⁵, R. Nandakumar⁵³, A. Nandi⁵⁹, T. Nanut⁴⁵, I. Nasteva², M. Needham⁵⁴, N. Neri^22,q, S. Neubert¹³, N. Neufeld⁴⁴, R. Newcombe⁵⁷, T. D. Nguyen⁴⁵, C. Nguyen-Mau^45,n, E. M. Niel⁸, S. Nieswand¹⁰, N. Nikitin³⁶, N. S. Nolte⁴⁴, C. Nunez⁷⁷, D. P. O’Hanlon¹⁶, A. Oblakowska-Mucha³¹, V. Obraztsov⁴¹, S. Ogilvy⁵⁵, R. Oldeman^23,f, C. J. G. Onderwater⁷², J. D. Osborn⁷⁷, A. Ossowska³⁰, J. M. Otalora Goicochea², T. Ovsiannikova³⁵, P. Owen⁴⁶, A. Oyanguren⁷⁶, P. R. Pais⁴⁵, T. Pajero^25,t, A. Palano¹⁵, M. Palutan¹⁹, G. Panshin⁷⁵, A. Papanestis⁵³, M. Pappagallo⁵⁴, L. L. Pappalardo^17,g, C. Pappenheimer⁶¹, W. Parker⁶², C. Parkes^58,44, G. Passaleva^18,44, A. Pastore¹⁵, M. Patel⁵⁷, C. Patrignani^16,e, A. Pearce⁴⁴, A. Pellegrino²⁸, M. Pepe Altarelli⁴⁴, S. Perazzini¹⁶, D. Pereima³⁵, P. Perret⁶, L. Pescatore⁴⁵, K. Petridis⁵⁰, A. Petrolini^20,h, A. Petrov⁷³, S. Petrucci⁵⁴, M. Petruzzo^22,q, B. Pietrzyk⁵, G. Pietrzyk⁴⁵, M. Pikies³⁰, M. Pili⁵⁹, D. Pinci²⁷, J. Pinzino⁴⁴, F. Pisani⁴⁴, A. Piucci¹³, V. Placinta³³, S. Playfer⁵⁴, J. Plews⁴⁹, M. Plo Casasus⁴³, F. Polci⁹, M. Poli Lener¹⁹, M. Poliakova⁶³, A. Poluektov⁷, N. Polukhina^74,c, I. Polyakov⁶³, E. Polycarpo², G. J. Pomery⁵⁰, S. Ponce⁴⁴, A. Popov⁴¹, D. Popov⁴⁹, S. Poslavskii⁴¹, K. Prasanth³⁰, L. Promberger⁴⁴, C. Prouve⁴³, V. Pugatch⁴⁸, A. Puig Navarro⁴⁶, H. Pullen⁵⁹, G. Punzi^25,p, W. Qian⁶⁶, J. Qin⁶⁶, R. Quagliani⁹, B. Quintana⁶, N. V. Raab¹⁴, R. I. Rabadan Trejo⁷, B. Rachwal³¹, J. H. Rademacker⁵⁰, M. Rama²⁵, M. Ramos Pernas⁴³, M. S. Rangel², F. Ratnikov^38,39, G. Raven²⁹, M. Ravonel Salzgeber⁴⁴, M. Reboud⁵, F. Redi⁴⁵, S. Reichert¹¹, A. C. dos Reis¹, F. Reiss⁹, C. Remon Alepuz⁷⁶, Z. Ren³, V. Renaudin⁵⁹, S. Ricciardi⁵³, S. Richards⁵⁰, K. Rinnert⁵⁶, P. Robbe⁸, A. Robert⁹, A. B. Rodrigues⁴⁵, E. Rodrigues⁶¹, J. A. Rodriguez Lopez⁷⁰, M. Roehrken⁴⁴, S. Roiser⁴⁴, A. Rollings⁵⁹, V. Romanovskiy⁴¹, M. Romero Lamas⁴³, A. Romero Vidal⁴³, J. D. Roth⁷⁷, M. Rotondo¹⁹, M. S. Rudolph⁶³, T. Ruf⁴⁴, J. Ruiz Vidal⁷⁶, J. Ryzka³¹, J. J. Saborido Silva⁴³, N. Sagidova³⁴, B. Saitta^23,f, C. Sanchez Gras²⁸, C. Sanchez Mayordomo⁷⁶, B. Sanmartin Sedes⁴³, R. Santacesaria²⁷, C. Santamarina Rios⁴³, M. Santimaria¹⁹, E. Santovetti^26,j, G. Sarpis⁵⁸, A. Sarti²⁷, C. Satriano^27,s, A. Satta²⁶, M. Saur⁶⁶, D. Savrina^35,36, L. G. Scantlebury Smead⁵⁹, S. Schael¹⁰, M. Schellenberg¹¹, M. Schiller⁵⁵, H. Schindler⁴⁴, M. Schmelling¹², T. Schmelzer¹¹, B. Schmidt⁴⁴, O. Schneider⁴⁵, A. Schopper⁴⁴, H. F. Schreiner⁶¹, M. Schubiger²⁸, S. Schulte⁴⁵, M. H. Schune⁸, R. Schwemmer⁴⁴, B. Sciascia¹⁹, A. Sciubba^27,k, S. Sellam⁶⁴, A. Semennikov³⁵, A. Sergi^49,44, N. Serra⁴⁶, J. Serrano⁷, L. Sestini²⁴, A. Seuthe¹¹, P. Seyfert⁴⁴, D. M. Shangase⁷⁷, M. Shapkin⁴¹, T. Shears⁵⁶, L. Shekhtman^40,x, V. Shevchenko^73,74, E. Shmanin⁷⁴, J. D. Shupperd⁶³, B. G. Siddi¹⁷, R. Silva Coutinho⁴⁶, L. Silva de Oliveira², G. Simi^24,o, S. Simone^15,d, I. Skiba¹⁷, N. Skidmore¹³, T. Skwarnicki⁶³, M. W. Slater⁴⁹, J. G. Smeaton⁵¹, A. Smetkina³⁵, E. Smith¹⁰, I. T. Smith⁵⁴, M. Smith⁵⁷, A. Snoch²⁸, M. Soares¹⁶, L. Soares Lavra¹, M. D. Sokoloff⁶¹, F. J. P. Soler⁵⁵, B. Souza De Paula², B. Spaan¹¹, E. Spadaro Norella^22,q, P. Spradlin⁵⁵, F. Stagni⁴⁴, M. Stahl⁶¹, S. Stahl⁴⁴, P. Stefko⁴⁵, S. Stefkova⁵⁷, O. Steinkamp⁴⁶, S. Stemmle¹³, O. Stenyakin⁴¹, M. Stepanova³⁴, H. Stevens¹¹, A. Stocchi⁸, S. Stone⁶³, S. Stracka²⁵, M. E. Stramaglia⁴⁵, M. Straticiuc³³, S. Strokov⁷⁵, J. Sun³, L. Sun⁶⁸, Y. Sun⁶², P. Svihra⁵⁸, K. Swientek³¹, A. Szabelski³², T. Szumlak³¹, M. Szymanski⁶⁶, S. T’Jampens⁵, S. Taneja⁵⁸, Z. Tang³, T. Tekampe¹¹, G. Tellarini¹⁷, F. Teubert⁴⁴, E. Thomas⁴⁴, K. A. Thomson⁵⁶, J. van Tilburg²⁸, M. J. Tilley⁵⁷, V. Tisserand⁶, M. Tobin⁴, S. Tolk⁴⁴, L. Tomassetti^17,g, D. Tonelli²⁵, D. Y. Tou⁹, E. Tournefier⁵, M. Traill⁵⁵, M. T. Tran⁴⁵, C. Trippl⁴⁵, A. Trisovic⁵¹, A. Tsaregorodtsev⁷, G. Tuci^25,44,p, A. Tully⁴⁵, N. Tuning²⁸, A. Ukleja³², D. J. Unverzagt¹³, A. Usachov⁸, A. Ustyuzhanin^38,39, U. Uwer¹³, A. Vagner⁷⁵, V. Vagnoni¹⁶, A. Valassi⁴⁴, G. Valenti¹⁶, H. Van Hecke⁷⁸, C. B. Van Hulse¹⁴, R. Vazquez Gomez⁴², P. Vazquez Regueiro⁴³, S. Vecchi¹⁷, M. van Veghel⁷², J. J. Velthuis⁵⁰, M. Veltri^18,r, A. Venkateswaran⁶³, M. Vernet⁶, M. Veronesi²⁸, M. Vesterinen⁵², J. V. Viana Barbosa⁴⁴, D. Vieira⁶⁶, M. Vieites Diaz⁴⁵, H. Viemann⁷¹, X. Vilasis-Cardona^42,m, A. Vitkovskiy²⁸, V. Volkov³⁶, A. Vollhardt⁴⁶, D. Vom Bruch⁹, A. Vorobyev³⁴, V. Vorobyev^40,x, N. Voropaev³⁴, J. A. de Vries²⁸, C. Vázquez Sierra²⁸, R. Waldi⁷¹, J. Walsh²⁵, J. Wang⁴, J. Wang³, J. Wang⁶⁸, M. Wang³, Y. Wang⁶⁹, Z. Wang⁴⁶, D. R. Ward⁵¹, H. M. Wark⁵⁶, N. K. Watson⁴⁹, D. Websdale⁵⁷, A. Weiden⁴⁶, C. Weisser⁶⁰, B. D. C. Westhenry⁵⁰, D. J. White⁵⁸, M. Whitehead¹⁰, D. Wiedner¹¹, G. Wilkinson⁵⁹, M. Wilkinson⁶³, I. Williams⁵¹, M. R. J. Williams⁵⁸, M. Williams⁶⁰, T. Williams⁴⁹, F. F. Wilson⁵³, M. Winn⁸, W. Wislicki³², M. Witek³⁰, G. Wormser⁸, S. A. Wotton⁵¹, H. Wu⁶³, K. Wyllie⁴⁴, Z. Xiang⁶⁶, D. Xiao⁶⁹, Y. Xie⁶⁹, H. Xing⁶⁷, A. Xu³, L. Xu³, M. Xu⁶⁹, Q. Xu⁶⁶, Z. Xu³, Z. Xu⁵, Z. Yang³, Z. Yang⁶², Y. Yao⁶³, L. E. Yeomans⁵⁶, H. Yin⁶⁹, J. Yu^69,aa, X. Yuan⁶³, O. Yushchenko⁴¹, K. A. Zarebski⁴⁹, M. Zavertyaev^12,c, M. Zdybal³⁰, M. Zeng³, D. Zhang⁶⁹, L. Zhang³, S. Zhang³, W. C. Zhang^3,z, Y. Zhang⁴⁴, A. Zhelezov¹³, Y. Zheng⁶⁶, X. Zhou⁶⁶, Y. Zhou⁶⁶, X. Zhu³, V. Zhukov^10,36, J. B. Zonneveld⁵⁴, and S. Zucchelli^16,e (LHCb Collaboration)

¹Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
²Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
³Center for High Energy Physics, Tsinghua University, Beijing, China
⁴Institute Of High Energy Physics (IHEP), Beijing, China
⁵Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France
⁶Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France
⁷Aix Marseille Université, CNRS/IN2P3, CPPM, Marseille, France
⁸LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France
⁹LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France
¹⁰I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
¹¹Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
¹²Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
¹³Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
¹⁴School of Physics, University College Dublin, Dublin, Ireland
¹⁵INFN Sezione di Bari, Bari, Italy
¹⁶INFN Sezione di Bologna, Bologna, Italy
¹⁷INFN Sezione di Ferrara, Ferrara, Italy
¹⁸INFN Sezione di Firenze, Firenze, Italy
¹⁹INFN Laboratori Nazionali di Frascati, Frascati, Italy
²⁰INFN Sezione di Genova, Genova, Italy
²¹INFN Sezione di Milano-Bicocca, Milano, Italy
²²INFN Sezione di Milano, Milano, Italy
²³INFN Sezione di Cagliari, Monserrato, Italy
²⁴INFN Sezione di Padova, Padova, Italy
²⁵INFN Sezione di Pisa, Pisa, Italy
²⁶INFN Sezione di Roma Tor Vergata, Roma, Italy
²⁷INFN Sezione di Roma La Sapienza, Roma, Italy
²⁸Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
²⁹Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands
³⁰Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
³¹AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland
³²National Center for Nuclear Research (NCBJ), Warsaw, Poland
³³Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
³⁴Petersburg Nuclear Physics Institute NRC Kurchatov Institute (PNPI NRC KI), Gatchina, Russia
³⁵Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia
³⁶Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
³⁷Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia
³⁸Yandex School of Data Analysis, Moscow, Russia
³⁹National Research University Higher School of Economics, Moscow, Russia
⁴⁰Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia
⁴¹Institute for High Energy Physics NRC Kurchatov Institute (IHEP NRC KI), Protvino, Russia
⁴²ICCUB, Universitat de Barcelona, Barcelona, Spain
⁴³Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
⁴⁴European Organization for Nuclear Research (CERN), Geneva, Switzerland
⁴⁵Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
⁴⁶Physik-Institut, Universität Zürich, Zürich, Switzerland
⁴⁷NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
⁴⁸Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
⁴⁹University of Birmingham, Birmingham, United Kingdom
⁵⁰H. H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
⁵¹Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
⁵²Department of Physics, University of Warwick, Coventry, United Kingdom
⁵³STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
⁵⁴School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
⁵⁵School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
⁵⁶Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
⁵⁷Imperial College London, London, United Kingdom
⁵⁸Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
⁵⁹Department of Physics, University of Oxford, Oxford, United Kingdom
⁶⁰Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
⁶¹University of Cincinnati, Cincinnati, Ohio, USA
⁶²University of Maryland, College Park, Maryland, USA
⁶³Syracuse University, Syracuse, New York, USA
⁶⁴Laboratory of Mathematical and Subatomic Physics, Constantine, Algeria [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil]
⁶⁵Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil [associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil]
⁶⁶University of Chinese Academy of Sciences, Beijing, China [associated with Center for High Energy Physics, Tsinghua University, Beijing, China]
⁶⁷South China Normal University, Guangzhou, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China)
⁶⁸School of Physics and Technology, Wuhan University, Wuhan, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China)
⁶⁹Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China (associated with Center for High Energy Physics, Tsinghua University, Beijing, China)
⁷⁰Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France)
⁷¹Institut für Physik, Universität Rostock, Rostock, Germany (associated with Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany)
⁷²Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands)
⁷³National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia]
⁷⁴National University of Science and Technology “MISIS,” Moscow, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia]
⁷⁵National Research Tomsk Polytechnic University, Tomsk, Russia [associated with Institute of Theoretical and Experimental Physics NRC Kurchatov Institute (ITEP NRC KI), Moscow, Russia]
⁷⁶Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia - CSIC, Valencia, Spain (associated with ICCUB, Universitat de Barcelona, Barcelona, Spain)
⁷⁷University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA)
⁷⁸Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA (associated with Syracuse University, Syracuse, New York, USA)

^*Full author list given at the end of the article.
^†Deceased.
^aUniversidade Federal do Triângulo Mineiro (UFTM), Uberaba-MG, Brazil.
^bLaboratoire Leprince-Ringuet, Palaiseau, France.
^cP. N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia.
^dUniversità di Bari, Bari, Italy.
^eUniversità di Bologna, Bologna, Italy.
^fUniversità di Cagliari, Cagliari, Italy.
^gUniversità di Ferrara, Ferrara, Italy.
^hUniversità di Genova, Genova, Italy.
ⁱUniversità di Milano Bicocca, Milano, Italy.
^jUniversità di Roma Tor Vergata, Roma, Italy.
^kUniversità di Roma La Sapienza, Roma, Italy.
^lAGH - University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland.
^mLIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain.
ⁿHanoi University of Science, Hanoi, Vietnam.
^oUniversità di Padova, Padova, Italy.
^pUniversità di Pisa, Pisa, Italy.
^qUniversità degli Studi di Milano, Milano, Italy.
^rUniversità di Urbino, Urbino, Italy.
^sUniversità della Basilicata, Potenza, Italy.
^tScuola Normale Superiore, Pisa, Italy.
^uUniversità di Modena e Reggio Emilia, Modena, Italy.
^vUniversità di Siena, Siena, Italy.
^wMSU - Iligan Institute of Technology (MSU-IIT), Iligan, Philippines.
^xNovosibirsk State University, Novosibirsk, Russia.
^ySezione INFN di Trieste, Trieste, Italy.
^zSchool of Physics and Information Technology, Shaanxi Normal University (SNNU), Xi’an, China.
^aaPhysics and Micro Electronic College, Hunan University, Changsha City, China.

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Phys. Rev. D 101, 012005 – Published 13 January, 2020

DOI: https://doi.org/10.1103/PhysRevD.101.012005

Abstract

A search for decay-time-dependent charge-parity ( $C P$ ) asymmetry in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays is performed at the LHCb experiment using proton-proton collision data recorded at a center-of-mass energy of 13 TeV, and corresponding to an integrated luminosity of $5.4 {fb}^{- 1}$ . The $D^{0}$ mesons are required to originate from semileptonic decays of $b$ hadrons, such that the charge of the muon identifies the flavor of the neutral $D$ meson at production. The asymmetries in the effective decay widths of $D^{0}$ and ${\bar{D}}^{0}$ mesons are determined to be $A_{Γ} (K^{+} K^{-}) = (- 4.3 \pm 3.6 \pm 0.5) \times 1 0^{- 4}$ and $A_{Γ} (π^{+} π^{-}) = (2.2 \pm 7.0 \pm 0.8) \times 1 0^{- 4}$ , where the uncertainties are statistical and systematic, respectively. The results are consistent with $C P$ symmetry and, when combined with previous LHCb results, yield $A_{Γ} (K^{+} K^{-}) = (- 4.4 \pm 2.3 \pm 0.6) \times 1 0^{- 4}$ and $A_{Γ} (π^{+} π^{-}) = (2.5 \pm 4.3 \pm 0.7) \times 1 0^{- 4}$ .

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References (42)

A. D. Sakharov, Violation of $C P$ invariance, $C$ asymmetry, and baryon asymmetry of the Universe, Pis’ma Zh. Eksp. Teor. Fiz. 5, 32 (1967) [JETP Lett. 5, 24 (1967)]; Usp. Fiz. Nauk 161, 61 (1991) [Sov. Phys. Usp. 34, 392 (1991)].
N. Cabibbo, Unitary Symmetry and Leptonic Decays, Phys. Rev. Lett. 10, 531 (1963).
M. Kobayashi and T. Maskawa, $C P$ -violation in the renormalizable theory of weak interaction, Prog. Theor. Phys. 49, 652 (1973).
P. Huet and E. Sather, Electroweak baryogenesis and standard model $C P$ violation, Phys. Rev. D 51, 379 (1995).
M. Dine and A. Kusenko, The origin of the matter-antimatter asymmetry, Rev. Mod. Phys. 76, 1 (2003).
J. H. Christenson, J. W. Cronin, V. L. Fitch, and R. Turlay, Evidence for the $2 π$ Decay of the $K_{2}^{0}$ Meson, Phys. Rev. Lett. 13, 138 (1964).
B. Aubert et al. (BABAR Collaboration), Direct $C P$ Violating Asymmetry in $B^{0} \to K^{+} π^{-}$ Decays, Phys. Rev. Lett. 93, 131801 (2004).
Y. Chao et al. (Belle Collaboration), Evidence for Direct $C P$ Violation in $B^{0} \to K^{+} π^{-}$ Decays, Phys. Rev. Lett. 93, 191802 (2004).
R. Aaij et al. (LHCb Collaboration), First Observation of $C P$ Violation in the Decays of $B_{s}^{0}$ Mesons, Phys. Rev. Lett. 110, 221601 (2013).
R. Aaij et al. (LHCb Collaboration), Observation of $C P$ violation in $B^{\pm} \to D K^{\pm}$ decays, Phys. Lett. B 712, 203 (2012); Erratum, 713, 351 (2012).
R. Aaij et al. (LHCb Collaboration), Observation of $C P$ Violation in Charm Decays, Phys. Rev. Lett. 122, 211803 (2019).
Y. Amhis et al. (Heavy Flavor Averaging Group), Averages of $b$ -hadron, $c$ -hadron, and $τ$ -lepton properties as of summer 2018, arXiv:1909.12524, updated results and plots available at https://hflav.web.cern.ch.
M. Chala, A. Lenz, A. V. Rusov, and J. Scholtz, $Δ A_{C P}$ within the Standard Model and beyond, J. High Energy Phys. 07 (2019) 161.
H.-N. Li, C.-D. Lü, and F.-S. Yu, Implications on the first observation of charm $C P V$ at LHCb, arXiv:1903.10638.
Y. Grossman and S. Schacht, The emergence of the $Δ U = 0$ rule in charm physics, J. High Energy Phys. 07 (2019) 020.
A. Soni, Resonance enhancement of charm $C P$ , arXiv:1905.00907.
F. Buccella, A. Paul, and P. Santorelli, $S U (3)_{F}$ breaking through final state interactions and $C P$ asymmetries in $D \to P P$ decays, Phys. Rev. D 99, 113001 (2019).
H.-Y. Cheng and C.-W. Chiang, Revisiting $C P$ violation in $D \to P P$ and $V P$ decays, Phys. Rev. D 100, 093002 (2019).
M. Golden and B. Grinstein, Enhanced $C P$ violations in hadronic charm decays, Phys. Lett. B 222, 501 (1989).
F. Buccella, M. Lusignoli, G. Miele, A. Pugliese, and P. Santorelli, Nonleptonic weak decays of charmed mesons, Phys. Rev. D 51, 3478 (1995).
S. Bianco, F. L. Fabbri, D. Benson, and I. Bigi, A Cicerone for the physics of charm, Riv. Nuovo Cimento 26, 1 (2003).
Y. Grossman, A. L. Kagan, and Y. Nir, New physics and $C P$ violation in singly Cabibbo suppressed $D$ decays, Phys. Rev. D 75, 036008 (2007).
M. Artuso, B. Meadows, and A. A. Petrov, Charm meson decays, Annu. Rev. Nucl. Part. Sci. 58, 249 (2008).
A. Khodjamirian and A. A. Petrov, Direct $C P$ asymmetry in $D \to π^{-} π^{+}$ and $D \to K^{-} K^{+}$ in QCD-based approach, Phys. Lett. B 774, 235 (2017).
J. P. Lees et al. (BABAR Collaboration), Measurement of $D^{0}$ - ${\bar{D}}^{0}$ mixing and $C P$ violation in two-body $D^{0}$ decays, Phys. Rev. D 87, 012004 (2013).
T. Aaltonen et al. (CDF Collaboration), Measurement of indirect $C P$ -violating asymmetries in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays at CDF, Phys. Rev. D 90, 111103 (2014).
M. Starič et al. (Belle Collaboration), Measurement of $D^{0}$ - ${\bar{D}}^{0}$ mixing and search for $C P$ violation in $D^{0} \to K^{+} K^{-}, π^{+} π^{-}$ decays with the full Belle data set, Phys. Lett. B 753, 412 (2016).
R. Aaij et al. (LHCb Collaboration), Measurement of indirect $C P$ asymmetries in $D^{0} \to K^{-} K^{+}$ and $D^{0} \to π^{-} π^{+}$ decays using semileptonic $B$ decays, J. High Energy Phys. 04 (2015) 043.
R. Aaij et al. (LHCb Collaboration), Measurement of the $C P$ Violation Parameter $A_{Γ}$ in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ Decays, Phys. Rev. Lett. 118, 261803 (2017).
R. Aaij et al. (LHCb Collaboration), Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates, Phys. Rev. Lett. 122, 231802 (2019).
A. Cerri et al., Opportunities in flavour physics at the HL-LHC and HE-LHC, arXiv:1812.07638.
M. Tanabashi et al. (Particle Data Group), Review of particle physics, Phys. Rev. D 98, 030001 (2018).
T. Aaltonen et al. (CDF Collaboration), Measurement of $C P$ -violating asymmetries in $D^{0} \to π^{+} π^{-}$ and $D^{0} \to K^{+} K^{-}$ decays at CDF, Phys. Rev. D 85, 012009 (2012).
M. Gersabeck, M. Alexander, S. Borghi, V. V. Gligorov, and C. Parkes, On the interplay of direct and indirect $C P$ violation in the charm sector, J. Phys. G 39, 045005 (2012).
LHCb Collaboration, Search for time-dependent $C P$ violation in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays, Report No. LHCb-CONF-2019-001, 2019.
A. A. Alves, Jr. et al. (LHCb Collaboration), The LHCb detector at the LHC, J. Instrum. 3, S08005 (2008).
R. Aaij et al. (LHCb Collaboration), LHCb detector performance, Int. J. Mod. Phys. A 30, 1530022 (2015).
G. Dujany and B. Storaci, Real-time alignment and calibration of the LHCb Detector in Run II, J. Phys. 664, 082010 (2015).
R. Aaij et al., The LHCb trigger and its performance in 2011, J. Instrum. 8, P04022 (2013).
R. Aaij et al., Tesla: An application for real-time data analysis in High Energy Physics, Comput. Phys. Commun. 208, 35 (2016).
N. L. Johnson, Systems of frequency curves generated by methods of translation, Biometrika 36, 149 (1949).
R. Aaij et al. (LHCb Collaboration), Updated determination of $D^{0}$ - ${\bar{D}}^{0}$ mixing and $C P$ violation parameters with $D^{0} \to K^{+} π^{-}$ decays, Phys. Rev. D 97, 031101 (2018).

Phys. Rev. D 101, 012005– Published 13 January, 2020

Vol. 101, Iss. 1 — 1 January 2020

Received 3 November 2019

DOI: https://doi.org/10.1103/PhysRevD.101.012005

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Updated measurement of decay-time-dependent $C P$ asymmetries in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays

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Updated measurement of decay-time-dependent CP asymmetries in D0→K+K− and D0→π+π− decays

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Updated measurement of decay-time-dependent $C P$ asymmetries in $D^{0} \to K^{+} K^{-}$ and $D^{0} \to π^{+} π^{-}$ decays