Measurements of direct CP-violating asymmetries in charmless decays of bottom baryons

T Aaltonen; S Amerio; D Amidei; A Anastassov; A Annovi; J Antos; G Apollinari; J A Appel; T Arisawa; A Artikov; J Asaadi; W Ashmanskas; B Auerbach; A Aurisano; F Azfar; W Badgett; T Bae; A Barbaro-Galtieri; V E Barnes; B A Barnett; P Barria; P Bartos; M Bauce; F Bedeschi; S Behari; G Bellettini; J Bellinger; D Benjamin; A Beretvas; A Bhatti; K R Bland; B Blumenfeld; A Bocci; A Bodek; D Bortoletto; J Boudreau; A Boveia; L Brigliadori; C Bromberg; E Brucken; J Budagov; H S Budd; K Burkett; G Busetto; P Bussey; P Butti; A Buzatu; A Calamba; S Camarda; M Campanelli; F Canelli; B Carls; D Carlsmith; R Carosi; S Carrillo; B Casal; M Casarsa; A Castro; P Catastini; D Cauz; V Cavaliere; M Cavalli-Sforza; A Cerri; L Cerrito; Y C Chen; M Chertok; G Chiarelli; G Chlachidze; K Cho; D Chokheli; A Clark; C Clarke; M E Convery; J Conway; M Corbo; M Cordelli; C A Cox; D J Cox; M Cremonesi; D Cruz; J Cuevas; R Culbertson; N d'Ascenzo; M Datta; P de Barbaro; L Demortier; M Deninno; M D'Errico; F Devoto; A Di Canto; B Di Ruzza; J R Dittmann; S Donati; M D'Onofrio; M Dorigo; A Driutti; K Ebina; R Edgar; A Elagin; R Erbacher; S Errede; B Esham; S Farrington; J P Fernández Ramos; R Field; G Flanagan; R Forrest; M Franklin; J C Freeman; H Frisch; Y Funakoshi; C Galloni; A F Garfinkel; P Garosi; H Gerberich; E Gerchtein; S Giagu; V Giakoumopoulou; K Gibson; C M Ginsburg; N Giokaris; P Giromini; G Giurgiu; V Glagolev; D Glenzinski; M Gold; D Goldin; A Golossanov; G Gomez; G Gomez-Ceballos; M Goncharov; O González López; I Gorelov; A T Goshaw; K Goulianos; E Gramellini; S Grinstein; C Grosso-Pilcher; R C Group; J Guimaraes da Costa; S R Hahn; J Y Han; F Happacher; K Hara; M Hare; R F Harr; T Harrington-Taber; K Hatakeyama; C Hays; J Heinrich; M Herndon; A Hocker; Z Hong; W Hopkins; S Hou; R E Hughes; U Husemann; M Hussein; J Huston; G Introzzi; M Iori; A Ivanov; E James; D Jang; B Jayatilaka; E J Jeon; S Jindariani; M Jones; K K Joo; S Y Jun; T R Junk; M Kambeitz; T Kamon; P E Karchin; A Kasmi; Y Kato; W Ketchum; J Keung; B Kilminster; D H Kim; H S Kim; J E Kim; M J Kim; S H Kim; S B Kim; Y J Kim; Y K Kim; N Kimura; M Kirby; K Knoepfel; K Kondo; D J Kong; J Konigsberg; A V Kotwal; M Kreps; J Kroll; M Kruse; T Kuhr; M Kurata; A T Laasanen; S Lammel; M Lancaster; K Lannon; G Latino; H S Lee; J S Lee; S Leo; S Leone; J D Lewis; A Limosani; E Lipeles; A Lister; H Liu; Q Liu; T Liu; S Lockwitz; A Loginov; D Lucchesi; A Lucà; J Lueck; P Lujan; P Lukens; G Lungu; J Lys; R Lysak; R Madrak; P Maestro; S Malik; G Manca; A Manousakis-Katsikakis; L Marchese; F Margaroli; P Marino; M Martínez; K Matera; M E Mattson; A Mazzacane; P Mazzanti; R McNulty; A Mehta; P Mehtala; C Mesropian; T Miao; D Mietlicki; A Mitra; H Miyake; S Moed; N Moggi; C S Moon; R Moore; M J Morello; A Mukherjee; Th Muller; P Murat; M Mussini; J Nachtman; Y Nagai; J Naganoma; I Nakano; A Napier; J Nett; C Neu; T Nigmanov; L Nodulman; S Y Noh; O Norniella; L Oakes; S H Oh; Y D Oh; I Oksuzian; T Okusawa; R Orava; L Ortolan; C Pagliarone; E Palencia; P Palni; V Papadimitriou; W Parker; G Pauletta; M Paulini; C Paus; T J Phillips; G Piacentino; E Pianori; J Pilot; K Pitts; C Plager; L Pondrom; S Poprocki; K Potamianos; A Pranko; F Prokoshin; F Ptohos; G Punzi; N Ranjan; I Redondo Fernández; P Renton; M Rescigno; F Rimondi; L Ristori; A Robson; T Rodriguez; S Rolli; M Ronzani; R Roser; J L Rosner; F Ruffini; A Ruiz; J Russ; V Rusu; W K Sakumoto; Y Sakurai; L Santi; K Sato; V Saveliev; A Savoy-Navarro; P Schlabach; E E Schmidt; T Schwarz; L Scodellaro; F Scuri; S Seidel; Y Seiya; A Semenov; F Sforza; S Z Shalhout; T Shears; P F Shepard; M Shimojima; M Shochet; I Shreyber-Tecker; A Simonenko; K Sliwa; J R Smith; F D Snider; H Song; V Sorin; R St Denis; M Stancari; D Stentz; J Strologas; Y Sudo; A Sukhanov; I Suslov; K Takemasa; Y Takeuchi; J Tang; M Tecchio; P K Teng; J Thom; E Thomson; V Thukral; D Toback; S Tokar; K Tollefson; T Tomura; D Tonelli; S Torre; D Torretta; P Totaro; M Trovato; F Ukegawa; S Uozumi; F Vázquez; G Velev; C Vellidis; C Vernieri; M Vidal; R Vilar; J Vizán; M Vogel; G Volpi; P Wagner; R Wallny; S M Wang; D Waters; W C Wester 3rd; D Whiteson; A B Wicklund; S Wilbur; H H Williams; J S Wilson; P Wilson; B L Winer; P Wittich; S Wolbers; H Wolfe; T Wright; X Wu; Z Wu; K Yamamoto; D Yamato; T Yang; U K Yang; Y C Yang; W-M Yao; G P Yeh; K Yi; J Yoh; K Yorita; T Yoshida; G B Yu; I Yu; A M Zanetti; Y Zeng; C Zhou; S Zucchelli; CDF Collaboration

doi:10.1103/PhysRevLett.113.242001

Measurements of direct CP-violating asymmetries in charmless decays of bottom baryons

Phys Rev Lett. 2014 Dec 12;113(24):242001. doi: 10.1103/PhysRevLett.113.242001. Epub 2014 Dec 9.

Authors

T Aaltonen¹, S Amerio², D Amidei³, A Anastassov⁴, A Annovi⁵, J Antos⁶, G Apollinari⁴, J A Appel⁴, T Arisawa⁷, A Artikov⁸, J Asaadi⁹, W Ashmanskas⁴, B Auerbach¹⁰, A Aurisano⁹, F Azfar¹¹, W Badgett⁴, T Bae¹², A Barbaro-Galtieri¹³, V E Barnes¹⁴, B A Barnett¹⁵, P Barria¹⁶, P Bartos⁶, M Bauce², F Bedeschi¹⁷, S Behari⁴, G Bellettini¹⁸, J Bellinger¹⁹, D Benjamin²⁰, A Beretvas⁴, A Bhatti²¹, K R Bland²², B Blumenfeld¹⁵, A Bocci²⁰, A Bodek²³, D Bortoletto¹⁴, J Boudreau²⁴, A Boveia²⁵, L Brigliadori²⁶, C Bromberg²⁷, E Brucken¹, J Budagov⁸, H S Budd²³, K Burkett⁴, G Busetto², P Bussey²⁸, P Butti¹⁸, A Buzatu²⁸, A Calamba²⁹, S Camarda³⁰, M Campanelli³¹, F Canelli²⁵, B Carls³², D Carlsmith¹⁹, R Carosi¹⁷, S Carrillo³³, B Casal³⁴, M Casarsa³⁵, A Castro²⁶, P Catastini³⁶, D Cauz³⁷, V Cavaliere³², M Cavalli-Sforza³⁰, A Cerri¹³, L Cerrito³¹, Y C Chen³⁸, M Chertok³⁹, G Chiarelli¹⁷, G Chlachidze⁴, K Cho¹², D Chokheli⁸, A Clark⁴⁰, C Clarke⁴¹, M E Convery⁴, J Conway³⁹, M Corbo⁴, M Cordelli⁵, C A Cox³⁹, D J Cox³⁹, M Cremonesi¹⁷, D Cruz⁹, J Cuevas³⁴, R Culbertson⁴, N d'Ascenzo⁴, M Datta⁴, P de Barbaro²³, L Demortier²¹, M Deninno⁴², M D'Errico², F Devoto¹, A Di Canto¹⁸, B Di Ruzza⁴, J R Dittmann²², S Donati¹⁸, M D'Onofrio⁴³, M Dorigo⁴⁴, A Driutti³⁷, K Ebina⁷, R Edgar³, A Elagin⁹, R Erbacher³⁹, S Errede³², B Esham³², S Farrington¹¹, J P Fernández Ramos⁴⁵, R Field³³, G Flanagan⁴, R Forrest³⁹, M Franklin³⁶, J C Freeman⁴, H Frisch²⁵, Y Funakoshi⁷, C Galloni¹⁸, A F Garfinkel¹⁴, P Garosi¹⁶, H Gerberich³², E Gerchtein⁴, S Giagu⁴⁶, V Giakoumopoulou⁴⁷, K Gibson²⁴, C M Ginsburg⁴, N Giokaris⁴⁷, P Giromini⁵, G Giurgiu¹⁵, V Glagolev⁸, D Glenzinski⁴, M Gold⁴⁸, D Goldin⁹, A Golossanov⁴, G Gomez³⁴, G Gomez-Ceballos⁴⁹, M Goncharov⁴⁹, O González López⁴⁵, I Gorelov⁴⁸, A T Goshaw²⁰, K Goulianos²¹, E Gramellini⁴², S Grinstein³⁰, C Grosso-Pilcher²⁵, R C Group⁵⁰, J Guimaraes da Costa³⁶, S R Hahn⁴, J Y Han²³, F Happacher⁵, K Hara⁵¹, M Hare⁵², R F Harr⁴¹, T Harrington-Taber⁴, K Hatakeyama²², C Hays¹¹, J Heinrich⁵³, M Herndon¹⁹, A Hocker⁴, Z Hong⁹, W Hopkins⁴, S Hou³⁸, R E Hughes⁵⁴, U Husemann⁵⁵, M Hussein²⁷, J Huston²⁷, G Introzzi⁵⁶, M Iori⁵⁷, A Ivanov³⁹, E James⁴, D Jang²⁹, B Jayatilaka⁴, E J Jeon¹², S Jindariani⁴, M Jones¹⁴, K K Joo¹², S Y Jun²⁹, T R Junk⁴, M Kambeitz⁵⁸, T Kamon⁵⁹, P E Karchin⁴¹, A Kasmi²², Y Kato⁶⁰, W Ketchum²⁵, J Keung⁵³, B Kilminster⁴, D H Kim¹², H S Kim¹², J E Kim¹², M J Kim⁵, S H Kim⁵¹, S B Kim¹², Y J Kim¹², Y K Kim²⁵, N Kimura⁷, M Kirby⁴, K Knoepfel⁴, K Kondo⁷, D J Kong¹², J Konigsberg³³, A V Kotwal²⁰, M Kreps⁵⁸, J Kroll⁵³, M Kruse²⁰, T Kuhr⁵⁸, M Kurata⁵¹, A T Laasanen¹⁴, S Lammel⁴, M Lancaster³¹, K Lannon⁵⁴, G Latino¹⁶, H S Lee¹², J S Lee¹², S Leo¹⁷, S Leone¹⁷, J D Lewis⁴, A Limosani²⁰, E Lipeles⁵³, A Lister⁴⁰, H Liu⁶¹, Q Liu¹⁴, T Liu⁴, S Lockwitz⁵⁵, A Loginov⁵⁵, D Lucchesi², A Lucà⁵, J Lueck⁵⁸, P Lujan¹³, P Lukens⁴, G Lungu²¹, J Lys¹³, R Lysak⁶, R Madrak⁴, P Maestro¹⁶, S Malik²¹, G Manca⁴³, A Manousakis-Katsikakis⁴⁷, L Marchese⁴², F Margaroli⁴⁶, P Marino⁶², M Martínez³⁰, K Matera³², M E Mattson⁴¹, A Mazzacane⁴, P Mazzanti⁴², R McNulty⁴³, A Mehta⁴³, P Mehtala¹, C Mesropian²¹, T Miao⁴, D Mietlicki³, A Mitra³⁸, H Miyake⁵¹, S Moed⁴, N Moggi⁴², C S Moon⁴, R Moore⁴, M J Morello⁶², A Mukherjee⁴, Th Muller⁵⁸, P Murat⁴, M Mussini²⁶, J Nachtman⁴, Y Nagai⁵¹, J Naganoma⁷, I Nakano⁶³, A Napier⁵², J Nett⁹, C Neu⁶¹, T Nigmanov²⁴, L Nodulman¹⁰, S Y Noh¹², O Norniella³², L Oakes¹¹, S H Oh²⁰, Y D Oh¹², I Oksuzian⁶¹, T Okusawa⁶⁰, R Orava¹, L Ortolan³⁰, C Pagliarone³⁵, E Palencia³⁴, P Palni⁴⁸, V Papadimitriou⁴, W Parker¹⁹, G Pauletta³⁷, M Paulini²⁹, C Paus⁴⁹, T J Phillips²⁰, G Piacentino¹⁷, E Pianori⁵³, J Pilot³⁹, K Pitts³², C Plager⁶⁴, L Pondrom¹⁹, S Poprocki⁴, K Potamianos¹³, A Pranko¹³, F Prokoshin⁸, F Ptohos⁵, G Punzi¹⁸, N Ranjan¹⁴, I Redondo Fernández⁴⁵, P Renton¹¹, M Rescigno⁴⁶, F Rimondi⁴², L Ristori⁶⁵, A Robson²⁸, T Rodriguez⁵³, S Rolli⁵², M Ronzani¹⁸, R Roser⁴, J L Rosner²⁵, F Ruffini¹⁶, A Ruiz³⁴, J Russ²⁹, V Rusu⁴, W K Sakumoto²³, Y Sakurai⁷, L Santi³⁷, K Sato⁵¹, V Saveliev⁴, A Savoy-Navarro⁴, P Schlabach⁴, E E Schmidt⁴, T Schwarz³, L Scodellaro³⁴, F Scuri¹⁷, S Seidel⁴⁸, Y Seiya⁶⁰, A Semenov⁸, F Sforza¹⁸, S Z Shalhout³⁹, T Shears⁴³, P F Shepard²⁴, M Shimojima⁵¹, M Shochet²⁵, I Shreyber-Tecker⁶⁶, A Simonenko⁸, K Sliwa⁵², J R Smith³⁹, F D Snider⁴, H Song²⁴, V Sorin³⁰, R St Denis²⁸, M Stancari⁴, D Stentz⁴, J Strologas⁴⁸, Y Sudo⁵¹, A Sukhanov⁴, I Suslov⁸, K Takemasa⁵¹, Y Takeuchi⁵¹, J Tang²⁵, M Tecchio³, P K Teng³⁸, J Thom⁴, E Thomson⁵³, V Thukral⁹, D Toback⁹, S Tokar⁶, K Tollefson²⁷, T Tomura⁵¹, D Tonelli⁴, S Torre⁵, D Torretta⁴, P Totaro⁶⁷, M Trovato⁶², F Ukegawa⁵¹, S Uozumi¹², F Vázquez³³, G Velev⁴, C Vellidis⁴, C Vernieri⁶², M Vidal¹⁴, R Vilar³⁴, J Vizán³⁴, M Vogel⁴⁸, G Volpi⁵, P Wagner⁵³, R Wallny⁴, S M Wang³⁸, D Waters³¹, W C Wester 3rd⁴, D Whiteson⁵³, A B Wicklund¹⁰, S Wilbur³⁹, H H Williams⁵³, J S Wilson³, P Wilson⁴, B L Winer⁵⁴, P Wittich⁴, S Wolbers⁴, H Wolfe⁵⁴, T Wright³, X Wu⁴⁰, Z Wu²², K Yamamoto⁶⁰, D Yamato⁶⁰, T Yang⁴, U K Yang¹², Y C Yang¹², W-M Yao¹³, G P Yeh⁴, K Yi⁴, J Yoh⁴, K Yorita⁷, T Yoshida⁶⁰, G B Yu²⁰, I Yu¹², A M Zanetti³⁵, Y Zeng²⁰, C Zhou²⁰, S Zucchelli²⁶; CDF Collaboration

Affiliations

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

PMID: 25541767
DOI: 10.1103/PhysRevLett.113.242001

Abstract

We report final measurements of direct CP-violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using the complete √s=1.96 TeV proton-antiproton collisions data set, corresponding to 9.3 fb⁻¹ of integrated luminosity, we measure A(Λ(b)⁰→pπ⁻)=+0.06±0.07(stat)±0.03(syst) and A(Λ(b)⁰→pK⁻)=-0.10±0.08(stat)±0.04(syst), compatible with no asymmetry. In addition we measure the CP-violating asymmetries in B(s)⁰→K⁻π⁺ and B⁰→K⁺π⁻ decays to be A(B(s)⁰→K⁻π⁺)=+0.22±0.07(stat)±0.02(syst) and A(B⁰→K⁺π⁻)=-0.083±0.013(stat)±0.004(syst), respectively, which are significantly different from zero and consistent with current world averages.