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Phys Rev Lett. 2013 Dec 6;111(23):231802. Epub 2013 Dec 4.

Observation of D⁰-D¯⁰ mixing using the CDF II detector.

Aaltonen T1, Amerio S2, Amidei D3, Anastassov A4, Annovi A5, Antos J6, Apollinari G4, Appel JA4, Arisawa T7, Artikov A8, Asaadi J9, Ashmanskas W4, Auerbach B10, Aurisano A9, Azfar F11, Badgett W4, Bae T12, Barbaro-Galtieri A13, Barnes VE14, Barnett BA15, Barria P16, Bartos P6, Bauce M2, Bedeschi F17, Behari S4, Bellettini G18, Bellinger J19, Benjamin D20, Beretvas A4, Bhatti A21, Bland KR22, Blumenfeld B15, Bocci A20, Bodek A23, Bortoletto D14, Boudreau J24, Boveia A25, Brigliadori L26, Bromberg C27, Brucken E1, Budagov J8, Budd HS23, Burkett K4, Busetto G2, Bussey P28, Butti P18, Buzatu A28, Calamba A29, Camarda S30, Campanelli M31, Canelli F25, Carls B32, Carlsmith D19, Carosi R17, Carrillo S33, Casal B34, Casarsa M35, Castro A26, Catastini P36, Cauz D37, Cavaliere V32, Cavalli-Sforza M30, Cerri A13, Cerrito L31, Chen YC38, Chertok M39, Chiarelli G17, Chlachidze G4, Cho K12, Chokheli D8, Clark A40, Clarke C41, Convery ME4, Conway J5, Corbo M4, Cordelli M5, Cox CA39, Cox DJ39, Cremonesi M17, Cruz D9, Cuevas J34, Culbertson R4, d'Ascenzo N4, Datta M4, de Barbaro P23, Demortier L21, Deninno M42, D'Errico M2, Devoto F1, Di Canto A18, Di Ruzza B4, Dittmann JR22, Donati S18, D'Onofrio M43, Dorigo M44, Driutti A37, Ebina K7, Edgar R3, Elagin A9, Erbacher R39, Errede S32, Esham B32, Farrington S11, Fernández Ramos JP45, Field R33, Flanagan G4, Forrest R39, Franklin M36, Freeman JC4, Frisch H25, Funakoshi Y7, Galloni C18, Garfinkel AF14, Garosi P16, Gerberich H32, Gerchtein E4, Giagu S46, Giakoumopoulou V47, Gibson K24, Ginsburg CM4, Giokaris N47, Giromini P5, Giurgiu G15, Glagolev V8, Glenzinski D4, Gold M48, Goldin D9, Golossanov A4, Gomez G34, Gomez-Ceballos G49, Goncharov M49, González López O45, Gorelov I48, Goshaw AT20, Goulianos K21, Gramellini E42, Grinstein S30, Grosso-Pilcher C25, Group RC50, Guimaraes da Costa J36, Hahn SR4, Han JY23, Happacher F5, Hara K51, Hare M52, Harr RF41, Harrington-Taber T4, Hatakeyama K22, Hays C11, Heinrich J53, Herndon M19, Hocker A4, Hong Z9, Hopkins W4, Hou S38, Hughes RE54, Husemann U55, Hussein M27, Huston J27, Introzzi G56, Iori M57, Ivanov A39, James E4, Jang D29, Jayatilaka B4, Jeon EJ12, Jindariani S4, Jones M14, Joo KK12, Jun SY29, Junk TR4, Kambeitz M58, Kamon T59, Karchin PE41, Kasmi A22, Kato Y60, Ketchum W25, Keung J53, Kilminster B4, Kim DH12, Kim HS12, Kim JE12, Kim MJ5, Kim SH51, Kim SB12, Kim YJ12, Kim YK25, Kimura N7, Kirby M4, Knoepfel K4, Kondo K7, Kong DJ12, Konigsberg J33, Kotwal AV20, Kreps M58, Kroll J53, Kruse M20, Kuhr T58, Kulkarni N41, Kurata M51, Laasanen AT14, Lammel S4, Lancaster M31, Lannon K54, Latino G16, Lee HS12, Lee JS12, Leo S17, Leone S17, Lewis JD4, Limosani A20, Lipeles E53, Lister A40, Liu H61, Liu Q14, Liu T4, Lockwitz S55, Loginov A55, Lucchesi D2, Lucà A5, Lueck J58, Lujan P13, Lukens P4, Lungu G21, Lys J58, Lysak R6, Madrak R4, Maestro P16, Malik S21, Manca G43, Manousakis-Katsikakis A47, Marchese L42, Margaroli F46, Marino P62, Martínez M30, Matera K32, Mattson ME41, Mazzacane A4, Mazzanti P42, McNulty R43, Mehta A43, Mehtala P1, Mesropian C21, Miao T4, Mietlicki D3, Mitra A38, Miyake H51, Moed S4, Moggi N42, Moon CS4, Moore R4, Morello MJ62, Mukherjee A4, Muller T58, Murat P4, Mussini M26, Nachtman J4, Nagai Y51, Naganoma J7, Nakano I63, Napier A52, Nett J9, Neu C61, Nigmanov T24, Nodulman L10, Noh SY12, Norniella O32, Oakes L11, Oh SH20, Oh YD12, Oksuzian I61, Okusawa T60, Orava R1, Ortolan L30, Pagliarone C35, Palencia E34, Palni P48, Papadimitriou V4, Parker W19, Pauletta G37, Paulini M29, Paus C49, Phillips TJ20, Piacentino G17, Pianori E53, Pilot J39, Pitts K32, Plager C64, Pondrom L19, Poprocki S4, Potamianos K13, Pranko A13, Prokoshin F8, Ptohos F5, Punzi G18, Ranjan N14, Redondo Fernández I45, Renton P11, Rescigno M46, Rimondi F42, Ristori L65, Robson A28, Rodriguez T53, Rolli S52, Ronzani M18, Roser R4, Rosner JL25, Ruffini F16, Ruiz A34, Russ J29, Rusu V4, Sakumoto WK23, Sakurai Y7, Santi L37, Sato K51, Saveliev V4, Savoy-Navarro A4, Schlabach P4, Schmidt EE4, Schwarz T3, Scodellaro L34, Scuri F17, Seidel S48, Seiya Y60, Semenov A8, Sforza F18, Shalhout SZ39, Shears T43, Shepard PF24, Shimojima M51, Shochet M25, Shreyber-Tecker I66, Simonenko A8, Sliwa K52, Smith JR39, Snider FD4, Song H24, Sorin V30, St Denis R28, Stancari M4, Stentz D4, Strologas J48, Sudo Y51, Sukhanov A4, Suslov I8, Takemasa K51, Takeuchi Y51, Tang J25, Tecchio M3, Teng PK38, Thom J4, Thomson E53, Thukral V9, Toback D9, Tokar S6, Tollefson K27, Tomura T51, Tonelli D4, Torre S5, Torretta D4, Totaro P67, Trovato M62, Ukegawa F51, Uozumi S12, Vázquez F33, Velev G4, Vellidis C4, Vernieri C62, Vidal M14, Vilar R34, Vizán J34, Vogel M48, Volpi G5, Wagner P53, Wallny R4, Wang SM38, Waters D31, Wester WC 3rd4, Whiteson D53, Wicklund AB10, Wilbur S39, Williams HH53, Wilson JS3, Wilson P4, Winer BL54, Wittich P4, Wolbers S4, Wolfe H54, Wright T3, Wu X40, Wu Z22, Yamamoto K60, Yamato D60, Yang T4, Yang UK12, Yang YC12, Yao WM13, Yeh GP4, Yi K4, Yoh J4, Yorita K7, Yoshida T60, Yu GB20, Yu I12, Zanetti AM35, Zeng Y20, Zhou C20, Zucchelli S26.

Author information

  • 1Division of High Energy Physics, Department of Physics, University of Helsinki, FIN-00014, Helsinki, Finland; Helsinki Institute of Physics, FIN-00014, Helsinki, Finland.
  • 2Istituto Nazionale di Fisica Nucleare, Sezione di Padova and University of Padova, I-35131 Padova, Italy.
  • 3University of Michigan, Ann Arbor, Michigan 48109, USA.
  • 4Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.
  • 5Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati, Italy.
  • 6Comenius University, 842 48 Bratislava, Slovakia; Institute of Experimental Physics, 040 01 Kosice, Slovakia.
  • 7Waseda University, Tokyo 169, Japan.
  • 8Joint Institute for Nuclear Research, RU-141980 Dubna, Russia.
  • 9Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
  • 10Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • 11University of Oxford, Oxford OX1 3RH, United Kingdom.
  • 12Center for High Energy Physics: Kyungpook National University, Daegu 702-701, Korea; Seoul National University, Seoul 151-742, Korea; Sungkyunkwan University, Suwon 440-746, Korea; Korea Institute of Science and Technology Information, Daejeon 305-806, Korea; Chonnam National University, Gwangju 500-757, Korea; Chonbuk National University, Jeonju 561-756, Korea; Ewha Womans University, Seoul, 120-750, Korea.
  • 13Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • 14Purdue University, West Lafayette, Indiana 47907, USA.
  • 15The Johns Hopkins University, Baltimore, Maryland 21218, USA.
  • 16Istituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy, and University of Siena, I-56127 Pisa, Italy.
  • 17Istituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy.
  • 18Istituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy, and University of Pisa, I-56127 Pisa, Italy.
  • 19University of Wisconsin, Madison, Wisconsin 53706, USA.
  • 20Duke University, Durham, North Carolina 27708, USA.
  • 21The Rockefeller University, New York, New York 10065, USA.
  • 22Baylor University, Waco, Texas 76798, USA.
  • 23University of Rochester, Rochester, New York 14627, USA.
  • 24University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
  • 25Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
  • 26Istituto Nazionale di Fisica Nucleare Bologna, I-40127 Bologna, Italy and University of Bologna, I-40127 Bologna, Italy.
  • 27Michigan State University, East Lansing, Michigan 48824, USA.
  • 28Glasgow University, Glasgow G12 8QQ, United Kingdom.
  • 29Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • 30Institut de Fisica d'Altes Energies, ICREA, Universitat Autonoma de Barcelona, E-08193, Bellaterra (Barcelona), Spain.
  • 31University College London, London WC1E 6BT, United Kingdom.
  • 32University of Illinois, Urbana, Illinois 61801, USA.
  • 33University of Florida, Gainesville, Florida 32611, USA.
  • 34Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander, Spain.
  • 35Istituto Nazionale di Fisica Nucleare Trieste, I-33100 Udine, Italy.
  • 36Harvard University, Cambridge, Massachusetts 02138, USA.
  • 37Istituto Nazionale di Fisica Nucleare Trieste, I-33100 Udine, Italy and Gruppo Collegato di Udine, I-33100 Udine, Italy and University of Udine, I-33100 Udine, Italy.
  • 38Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China.
  • 39University of California, Davis, Davis, California 95616, USA.
  • 40University of Geneva, CH-1211 Geneva 4, Switzerland.
  • 41Wayne State University, Detroit, Michigan 48201, USA.
  • 42Istituto Nazionale di Fisica Nucleare Bologna, I-40127 Bologna, Italy.
  • 43University of Liverpool, Liverpool L69 7ZE, United Kingdom.
  • 44Istituto Nazionale di Fisica Nucleare Trieste, I-33100 Udine, Italy and University of Trieste, I-34127 Trieste, Italy.
  • 45Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, E-28040 Madrid, Spain.
  • 46Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1.
  • 47University of Athens, 157 71 Athens, Greece.
  • 48University of New Mexico, Albuquerque, New Mexico 87131, USA.
  • 49Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • 50Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA and University of Virginia, Charlottesville, Virginia 22906, USA.
  • 51University of Tsukuba, Tsukuba, Ibaraki 305, Japan.
  • 52Tufts University, Medford, Massachusetts 02155, USA.
  • 53University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
  • 54The Ohio State University, Columbus, Ohio 43210, USA.
  • 55Yale University, New Haven, Connecticut 06520, USA.
  • 56Istituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy, and INFN Pavia, I-27100 Pavia, Italy, and University of Pavia, I-27100 Pavia, Italy.
  • 57Istituto Nazionale di Fisica Nucleare, Sezione di Roma 1 and Sapienza Università di Roma, I-00185 Roma, Italy.
  • 58Institut für Experimentelle Kernphysik, Karlsruhe Institute of Technology, D-76131 Karlsruhe, Germany.
  • 59Center for High Energy Physics: Kyungpook National University, Daegu 702-701, Korea; Seoul National University, Seoul 151-742, Korea; Sungkyunkwan University, Suwon 440-746, Korea; Korea Institute of Science and Technology Information, Daejeon 305-806, Korea; Chonnam National University, Gwangju 500-757, Korea; Chonbuk National University, Jeonju 561-756, Korea; Ewha Womans University, Seoul, 120-750, Korea and Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA.
  • 60Osaka City University, Osaka 558-8585, Japan.
  • 61University of Virginia, Charlottesville, Virginia 22906, USA.
  • 62Istituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy, and Scuola Normale Superiore, I-56127 Pisa, Italy.
  • 63Okayama University, Okayama 700-8530, Japan.
  • 64University of California, Los Angeles, Los Angeles, California 90024, USA.
  • 65Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA and Istituto Nazionale di Fisica Nucleare Pisa, I-56127 Pisa, Italy.
  • 66Institution for Theoretical and Experimental Physics, ITEP, Moscow 117259, Russia.
  • 67Istituto Nazionale di Fisica Nucleare, Sezione di Padova.

Abstract

We measure the time dependence of the ratio of decay rates for D0→K(+)π(-) to the Cabibbo-favored decay D(0)→K(-)π(+). The charge conjugate decays are included. A signal of 3.3×10(4) D(*+)→π(+)D(0), D(0)→K(+)π(-) decays is obtained with D0 proper decay times between 0.75 and 10 mean D0 lifetimes. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 9.6  fb(-1) for pp¯ collisions at √s=1.96  TeV. Assuming CP conservation, we search for D0-D¯0 mixing and measure the mixing parameters to be R(D)=(3.51±0.35)×10(-3), y'=(4.3±4.3)×10(-3), and x'2=(0.08±0.18)×10(-3). We report Bayesian probability intervals in the x'2-y' plane and find that the significance of excluding the no-mixing hypothesis is equivalent to 6.1 Gaussian standard deviations, providing the second observation of D0-D¯0 mixing from a single experiment.

PMID:
24476256
[PubMed - in process]
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