학술논문

Measurements of charm mixing and $C\!P$ violation using $D^0 \to K^\pm \pi^\mp$ decays
Document Type
Working Paper
Author
LHCb collaborationAaij, R.Adeva, B.Adinolfi, M.Ajaltouni, Z.Akar, S.Albrecht, J.Alessio, F.Alexander, M.Ali, S.Alkhazov, G.Cartelle, P. AlvarezAlves Jr, A. A.Amato, S.Amerio, S.Amhis, Y.An, L.Anderlini, L.Andreassi, G.Andreotti, M.Andrews, J. E.Appleby, R. B.Archilli, F.d'Argent, P.Romeu, J. ArnauArtamonov, A.Artuso, M.Aslanides, E.Auriemma, G.Baalouch, M.Babuschkin, I.Bachmann, S.Back, J. J.Badalov, A.Baesso, C.Baker, S.Baldini, W.Barlow, R. J.Barschel, C.Barsuk, S.Barter, W.Baszczyk, M.Batozskaya, V.Batsukh, B.Battista, V.Bay, A.Beaucourt, L.Beddow, J.Bedeschi, F.Bediaga, I.Bel, L. J.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.Bezshyiko, 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, T. J. V.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.Gomez, M. CalvoCamboni, A.Campana, P.Perez, D. CamporaPerez, D. H. CamporaCapriotti, L.Carbone, A.Carboni, G.Cardinale, R.Cardini, A.Carniti, P.Carson, L.Akiba, K. CarvalhoCasse, G.Cassina, L.Garcia, L. CastilloCattaneo, M.Cauet, Ch.Cavallero, G.Cenci, R.Charles, M.Charpentier, Ph.Chatzikonstantinidis, G.Chefdeville, M.Chen, S.Cheung, S. -F.Chobanova, V.Chrzaszcz, M.Vidal, X. CidCiezarek, G.Clarke, P. E. L.Clemencic, M.Cliff, H. V.Closier, J.Coco, V.Cogan, J.Cogneras, E.Cogoni, V.Cojocariu, L.Collazuol, G.Collins, P.Comerma-Montells, A.Contu, A.Cook, A.Coombs, G.Coquereau, S.Corti, G.Corvo, M.Sobral, C. M. CostaCouturier, B.Cowan, G. A.Craik, D. C.Crocombe, A.Torres, M. CruzCunliffe, S.Currie, R.D'Ambrosio, C.Marinho, F. Da CunhaDall'Occo, E.Dalseno, J.David, P. N. Y.Davis, A.Francisco, O. De AguiarDe Bruyn, K.De Capua, S.De Cian, M.De Miranda, J. M.De Paula, L.De Serio, M.De Simone, P.Dean, C. -T.Decamp, D.Deckenhoff, M.Del Buono, L.Demmer, M.Derkach, D.Deschamps, O.Dettori, F.Dey, B.Di Canto, A.Dijkstra, H.Dordei, F.Dorigo, M.Suárez, A. DosilDovbnya, A.Dreimanis, K.Dufour, L.Dujany, G.Dungs, K.Durante, P.Dzhelyadin, R.Dziurda, A.Dzyuba, A.Déléage, N.Easo, S.Ebert, M.Egede, U.Egorychev, V.Eidelman, S.Eisenhardt, S.Eitschberger, U.Ekelhof, R.Eklund, L.Elsasser, Ch.Ely, S.Esen, S.Evans, H. M.Evans, T.Falabella, A.Farley, N.Farry, S.Fay, R.Fazzini, D.Ferguson, D.Albor, V. FernandezPrieto, A. FernandezFerrari, F.Rodrigues, F. FerreiraFerro-Luzzi, M.Filippov, S.Fini, R. A.Fiore, M.Fiorini, M.Firlej, M.Fitzpatrick, C.Fiutowski, T.Fleuret, F.Fohl, K.Fontana, M.Fontanelli, F.Forshaw, D. C.Forty, R.Lima, V. FrancoFrank, M.Frei, C.Fu, J.Furfaro, E.Färber, C.Torreira, A. GallasGalli, D.Gallorini, S.Gambetta, S.Gandelman, M.Gandini, P.Gao, Y.Martin, L. M. GarciaPardiñas, J. GarcíaTico, J. GarraGarrido, L.Garsed, P. J.Gascon, D.Gaspar, C.Gavardi, L.Gazzoni, G.Gerick, D.Gersabeck, E.Gersabeck, M.Gershon, T.Ghez, Ph.Gianì, S.Gibson, V.Girard, O. G.Giubega, L.Gizdov, K.Gligorov, V. V.Golubkov, D.Golutvin, A.Gomes, A.Gorelov, I. V.Gotti, C.Gándara, M. GrabalosaDiaz, R. GracianiCardoso, L. A. GranadoGraugés, E.Graverini, E.Graziani, G.Grecu, A.Griffith, P.Grillo, L.Cazon, B. R. GrubergGrünberg, O.Gushchin, E.Guz, Yu.Gys, T.Göbel, C.Hadavizadeh, T.Hadjivasiliou, C.Haefeli, G.Haen, C.Haines, S. C.Hall, S.Hamilton, B.Han, X.Hansmann-Menzemer, S.Harnew, N.Harnew, S. T.Harrison, J.Hatch, M.He, J.Head, T.Heister, A.Hennessy, K.Henrard, P.Henry, L.Morata, J. A. Hernandovan Herwijnen, E.Heß, M.Hicheur, A.Hill, D.Hombach, C.Hopchev, H.Hulsbergen, W.Humair, T.Hushchyn, M.Hussain, N.Hutchcroft, D.Idzik, M.Ilten, P.Jacobsson, R.Jaeger, A.Jalocha, J.Jans, E.Jawahery, A.Jiang, F.John, M.Johnson, D.Jones, C. R.Joram, C.Jost, B.Jurik, N.Kandybei, S.Kanso, W.Karacson, M.Kariuki, J. M.Karodia, S.Kecke, M.Kelsey, M.Kenyon, I. R.Kenzie, M.Ketel, T.Khairullin, E.Khanji, B.Khurewathanakul, C.Kirn, T.Klaver, S.Klimaszewski, K.Koliiev, S.Kolpin, M.Komarov, I.Koopman, R. F.Koppenburg, P.Kosmyntseva, A.Kozachuk, A.Kozeiha, M.Kravchuk, L.Kreplin, K.Kreps, M.Krokovny, P.Kruse, F.Krzemien, W.Kucewicz, W.Kucharczyk, M.Kudryavtsev, V.Kuonen, A. K.Kurek, K.Kvaratskheliya, T.Lacarrere, D.Lafferty, G.Lai, A.Lambert, D.Lanfranchi, G.Langenbruch, C.Latham, T.Lazzeroni, C.Gac, R. Levan Leerdam, J.Lees, J. -P.Leflat, A.Lefrançois, J.Lefèvre, R.Lemaitre, F.Cid, E. LemosLeroy, O.Lesiak, T.Leverington, B.Li, Y.Likhomanenko, T.Lindner, R.Linn, C.Lionetto, F.Liu, B.Liu, X.Loh, D.Longstaff, I.Lopes, J. H.Lucchesi, D.Martinez, M. LucioLuo, 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, J. F.Marconi, U.Benito, C. MarinMarino, P.Marks, J.Martellotti, G.Martin, M.Martinelli, M.Santos, D. MartinezVidal, F. MartinezTostes, D. MartinsMassacrier, L. M.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.Meier, F.Meissner, M.Melnychuk, D.Merk, M.Merli, A.Michielin, E.Milanes, D. A.Minard, M. -N.Mitzel, D. S.Mogini, A.Rodriguez, J. MolinaMonroy, I. A.Monteil, S.Morandin, M.Morawski, P.Mordà, A.Morello, M. J.Moron, J.Morris, A. B.Mountain, R.Muheim, F.Mulder, M.Mussini, M.Müller, D.Müller, J.Müller, K.Müller, V.Naik, P.Nakada, T.Nandakumar, R.Nandi, A.Nasteva, I.Needham, M.Neri, N.Neubert, S.Neufeld, N.Neuner, M.Nguyen, A. D.Nguyen-Mau, C.Nieswand, S.Niet, R.Nikitin, N.Nikodem, T.Novoselov, A.O'Hanlon, D. P.Oblakowska-Mucha, A.Obraztsov, V.Ogilvy, S.Oldeman, R.Onderwater, C. J. G.Goicochea, J. M. OtaloraOtto, A.Owen, P.Oyanguren, A.Pais, P. R.Palano, A.Palombo, F.Palutan, M.Panman, J.Papanestis, A.Pappagallo, M.Pappalardo, L. L.Parker, W.Parkes, C.Passaleva, G.Pastore, A.Patel, G. D.Patel, M.Patrignani, C.Pearce, A.Pellegrino, A.Penso, G.Altarelli, M. PepePerazzini, S.Perret, P.Pescatore, L.Petridis, K.Petrolini, A.Petrov, A.Petruzzo, M.Olloqui, E. PicatostePietrzyk, B.Pikies, M.Pinci, D.Pistone, A.Piucci, A.Playfer, S.Casasus, M. PloPoikela, T.Polci, F.Poluektov, A.Polyakov, I.Polycarpo, E.Pomery, G. J.Popov, A.Popov, D.Popovici, B.Poslavskii, S.Potterat, C.Price, E.Price, J. 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Source
Phys. Rev. D 95, 052004 (2017)
Subject
High Energy Physics - Experiment
Language
Abstract
Measurements of charm mixing and $C\!P$ violation parameters from the decay-time-dependent ratio of $ D^0 \to K^+ \pi^- $ to $ D^0 \to K^- \pi^+ $ decay rates and the charge-conjugate ratio are reported. The analysis uses $\overline{B}\to D^{*+} \mu^- X$, and charge-conjugate decays, where $D^{*+}\to D^0 \pi^+$, and $D^0\to K^{\mp} \pi^{\pm}$. The $pp$ collision data are recorded by the LHCb experiment at center-of-mass energies $\sqrt{s}$ = 7 and 8 TeV, corresponding to an integrated luminosity of 3 fb$^{-1}$. The data are analyzed under three hypotheses: (i) mixing assuming $C\!P$ symmetry, (ii) mixing assuming no direct $C\!P$ violation in the Cabibbo-favored or doubly Cabibbo-suppressed decay amplitudes, and (iii) mixing allowing either direct $C\!P$ violation and/or $C\!P$ violation in the superpositions of flavor eigenstates defining the mass eigenstates. The data are also combined with those from a previous LHCb study of $D^0\to K \pi$ decays from a disjoint set of $ D^{*+} $ candidates produced directly in $pp$ collisions. In all cases, the data are consistent with the hypothesis of $C\!P$ symmetry.
Comment: 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-2016-033.html