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首页> 外文期刊>Physical review, D >Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions
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Measurement of the forward-backward asymmetry in low-mass bottom-quark pairs produced in proton-antiproton collisions

机译:质子 - 反罗本碰撞中生产低质量底痕对的前后不对称的测量

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摘要

We report a measurement of the forward-backward asymmetry, A(FB), in b (b) over bar pairs produced in proton-antiproton collisions and identified by muons from semileptonic b-hadron decays. The event sample is collected at a center-of-mass energy of root s = 1.96 TeV with the CDF II detector and corresponds to 6.9 fb(-1) of integrated luminosity. We obtain an integrated asymmetry of A(FB)(b (b) over bar) = (1.2 +/- 0.7)% at the particle level for b-quark pairs with invariant mass, m(b (b) over bar), down to 40 GeV/c(2) and measure the dependence of A(FB)(b (b) over bar) on m(b (b) over bar). The results are compatible with expectations from the standard model.
机译:我们报告了在质子 - 反罗素碰撞中产生的B(B)的前后不对称,A(FB)的测量,并通过从半核心B-HADRON衰变的MUONS识别。 在CDF II检测器的根S = 1.96 TEV的核心能量下收集事件样品,对应于6.9FB(-1)的集成光度。 我们在具有不变质量的B-QUARK对的粒度下获得(FB)(B(b)的粒度)(B)(b))(1.2 +/- 0.7)%,m(b(b)栏), 下至40 gev / c(2)并测量(Fb)(b)(b)上的依赖性)在m(b(b)上方)。 结果与标准模型的期望兼容。

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  • 来源
    《Physical review, D 》 |2016年第1期| 共12页
  • 作者

    Aaltonen T.; Amerio S.; Amidei D.; Anastassov A.; Annovi A.; Antos J.; Apollinari G.; Appel J. A.; Arisawa T.; Artikov A.; Asaadi J.; Ashmanskas W.; Auerbach B.; Aurisano A.; Azfar F.; Badgett W.; Bae T.; Barbaro-Galtieri A.; Barnes V. E.; Barnett B. A.; Barria P.; Bartos P.; Bauce M.; Bedeschi F.; Behari S.; Bellettini G.; Bellinger J.; Benjamin D.; Beretvas A.; Bhatti A.; Bland K. R.; Blumenfeld B.; Bocci A.; Bodek A.; Bortoletto D.; Boudreau J.; Boveia A.; Brigliadori L.; Bromberg C.; Brucken E.; Budagov J.; Budd H. S.; Burkett K.; Busetto G.; Bussey P.; Butti P.; Buzatu A.; Calamba A.; Camarda S.; Campanelli M.; Canelli F.; Carls B.; Carlsmith D.; Carosi R.; Carrillo S.; Casal B.; Casarsa M.; Castro A.; Catastini P.; Cauz D.; Cavaliere V.; Cerri A.; Cerrito L.; Chen Y. C.; Chertok M.; Chiarelli G.; Chlachidze G.; Cho K.; Chokheli D.; Clark A.; Clarke C.; Convery M. E.; Conway J.; Corbo M.; Cordelli M.; Cox C. A.; Cox D. J.; Cremonesi M.; Cruz D.; Cuevas J.; Culbertson R.; dAscenzo N.; Datta M.; de Barbaro P.; Demortier L.; Deninno M.; DErrico M.; Devoto F.; Di Canto A.; Di Ruzza B.; Dittmann J. R.; Donati S.; DOnofrio M.; Dorigo M.; Driutti A.; Ebina K.; Edgar R.; Erbacher R.; Errede S.; Esham B.; Farrington S.; Fernandez Ramos J. P.; Field R.; Flanagan G.; Forrest R.; Franklin M.; Freeman J. C.; Frisch H.; Funakoshi Y.; Galloni C.; Garfinkel A. F.; Garosi P.; Gerberich H.; Gerchtein E.; Giagu S.; Giakoumopoulou V.; Gibson K.; Ginsburg C. M.; Giokaris N.; Giromini P.; Glagolev V.; Glenzinski D.; Gold M.; Goldin D.; Golossanov A.; Gomez G.; Gomez-Ceballos G.; Goncharov M.; Gonzalez Lopez O.; Gorelov I.; Goshaw A. T.; Goulianos K.; Gramellini E.; Grosso-Pilcher C.; da Costa J. Guimaraes; Hahn S. R.; Han J. Y.; Happacher F.; Hara K.; Hare M.; Harr R. F.; Harrington-Taber T.; Hatakeyama K.; Hays C.; Heinrich J.; Herndon M.; Hocker A.; Hong Z.; Hopkins W.; Hou S.; Hughes R. E.; Husemann U.; Hussein M.; Huston J.; Introzzi G.; Iori M.; Ivanov A.; James E.; Jang D.; Jayatilaka B.; Jeon E. J.; Jindariani S.; Jones M.; Joo K. K.; Jun S. Y.; Junk T. R.; Kambeitz M.; Kamon T.; Karchin P. E.; Kasmi A.; Kato Y.; Ketchum W.; Keung J.; Kilminster B.; Kim D. H.; Kim H. S.; Kim J. E.; Kim M. J.; Kim S. H.; Kim S. B.; Kim Y. J.; Kim Y. K.; Kimura N.; Kirby M.; Kondo K.; Kong D. J.; Konigsberg J.; Kotwal A. V.; Kreps M.; Kroll J.; Kruse M.; Kuhr T.; Kurata M.; Laasanen A. T.; Lammel S.; Lancaster M.; Lannon K.; Latino G.; Lee H. S.; Lee J. S.; Leo S.; Leone S.; Lewis J. D.; Limosani A.; Lipeles E.; Lister A.; Liu Q.; Liu T.; Lockwitz S.; Loginov A.; Lucchesi D.; Luca A.; Lueck J.; Lujan P.; Lukens P.; Lungu G.; Lys J.; Lysak R.; Madrak R.; Maestro P.; Majersky O.; Malik S.; Manca G.; Manousakis-Katsikakis A.; Marchese L.; Margaroli F.; Marino P.; Matera K.; Mattson M. E.; Mazzacane A.; Mazzanti P.; McNulty R.; Mehta A.; Mehtala P.; Mesropian C.; Miao T.; Mietlicki D.; Mitra A.; Miyake H.; Moed S.; Moggi N.; Moon C. S.; Moore R.; Morello M. J.; Mukherjee A.; Muller Th.; Murat P.; Mussini M.; Nachtman J.; Nagai Y.; Naganoma J.; Nakano I.; Napier A.; Nett J.; Nigmanov T.; Nodulman L.; Noh S. Y.; Norniella O.; Oakes L.; Oh S. H.; Oh Y. D.; Okusawa T.; Orava R.; Ortolan L.; Pagliarone C.; Palencia E.; Palni P.; Papadimitriou V.; Parker W.; Pauletta G.; Paulini M.; Paus C.; Phillips T. J.; Piacentino G.; Pianori E.; Pilot J.; Pitts K.; Plager C.; Pondrom L.; Poprocki S.; Potamianos K.; Pranko A.; Prokoshin F.; Ptohos F.; Punzi G.; Redondo Fernandez I.; Renton P.; Rescigno M.; Rimondi F.; Ristori L.; Robson A.; Rodriguez T.; Rolli S.; Ronzani M.; Roser R.; Rosner J. L.; Ruffini F.; Ruiz A.; Russ J.; Rusu V.; Sakumoto W. K.; Sakurai Y.; Santi L.; Sato K.; Saveliev V.; Savoy-Navarro A.; Schlabach P.; Schmidt E. E.; Schwarz T.; Scodellaro L.; Scuri F.; Seidel S.; Seiya Y.; Semenov A.; Sforza F.; Shalhout S. Z.; Shears T.; Shepard P. F.; Shimojima M.; Shochet M.; Shreyber-Tecker I.; Simonenko A.; Sliwa K.; Smith J. R.; Snider F. D.; Song H.; Sorin V.; Denis R. St.; Stancari M.; Stentz D.; Strologas J.; Sudo Y.; Sukhanov A.; Suslov I.; Takemasa K.; Takeuchi Y.; Tang J.; Tecchio M.; Teng P. K.; Thom J.; Thomson E.; Thukral V.; Toback D.; Tokar S.; Tollefson K.; Tomura T.; Tonelli D.; Torre S.; Torretta D.; Totaro P.; Trovato M.; Ukegawa F.; Uozumi S.; Vazquez F.; Velev G.; Vellidis C.; Vernieri C.; Vidal M.; Vilar R.; Vizan J.; Vogel M.; Volpi G.; Wagner P.; Wallny R.; Wang S. M.; Waters D.; Wester W. C. III; Whiteson D.; Wicklund A. B.; Wilbur S.; Williams H. H.; Wilson J. S.; Wilson P.; Winer B. L.; Wittich P.; Wolbers S.; Wolfe H.; Wright T.; Wu X.; Wu Z.; Yamamoto K.; Yamato D.; Yang T.; Yang U. K.; Yang Y. C.; Yao W. -M.; Yeh G. P.; Yi K.; Yoh J.; Yorita K.; Yoshida T.; Yu G. B.; Yu I.; Zanetti A. M.; Zeng Y.; Zhou C.; Zucchelli S.;

  • 作者单位

    Univ Helsinki Dept Phys Div High Energy Phys FIN-00014 Helsinki Finland;

    Ist Nazl Fis Nucl Sez Padova I-35131 Padua Italy;

    Univ Michigan Ann Arbor MI 48109 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Comenius Univ Bratislava 84248 Slovakia;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Waseda Univ Tokyo 169 Japan;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Argonne Natl Lab 9700 S Cass Ave Argonne IL 60439 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Univ Oxford Oxford OX1 3RH England;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    Purdue Univ W Lafayette IN 47907 USA;

    Johns Hopkins Univ Baltimore MD 21218 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Comenius Univ Bratislava 84248 Slovakia;

    Ist Nazl Fis Nucl Sez Padova I-35131 Padua Italy;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Wisconsin Madison WI 53706 USA;

    Duke Univ Durham NC 27708 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Rockefeller Univ New York NY 10065 USA;

    Baylor Univ Waco TX 76798 USA;

    Johns Hopkins Univ Baltimore MD 21218 USA;

    Duke Univ Durham NC 27708 USA;

    Univ Rochester 601 Elmwood Ave Rochester NY 14627 USA;

    Purdue Univ W Lafayette IN 47907 USA;

    Univ Pittsburgh Pittsburgh PA 15260 USA;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Michigan State Univ E Lansing MI 48824 USA;

    Univ Helsinki Dept Phys Div High Energy Phys FIN-00014 Helsinki Finland;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Univ Rochester 601 Elmwood Ave Rochester NY 14627 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Padua I-35131 Padua Italy;

    Univ Glasgow Glasgow G12 8QQ Lanark Scotland;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Glasgow Glasgow G12 8QQ Lanark Scotland;

    Carnegie Mellon Univ Pittsburgh PA 15213 USA;

    Univ Autonoma Barcelona ICREA Inst Fis Altes Energies E-08193 Bellaterra Barcelona Spain;

    UCL Mortimer St London WC1E 6BT England;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Univ Illinois Urbana IL 61801 USA;

    Univ Wisconsin Madison WI 53706 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Florida Gainesville FL 32611 USA;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Harvard Univ Cambridge MA 02138 USA;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Univ Illinois Urbana IL 61801 USA;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    UCL Mortimer St London WC1E 6BT England;

    Acad Sinica Inst Phys Taipei 11529 Taiwan;

    Univ Calif Davis Davis CA 95616 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Univ Geneva CH-1211 Geneva 4 Switzerland;

    Wayne State Univ Detroit MI 48201 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Univ Calif Davis Davis CA 95616 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Rochester 601 Elmwood Ave Rochester NY 14627 USA;

    Rockefeller Univ New York NY 10065 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Ist Nazl Fis Nucl Sez Padova I-35131 Padua Italy;

    Univ Helsinki Dept Phys Div High Energy Phys FIN-00014 Helsinki Finland;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Baylor Univ Waco TX 76798 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Liverpool Liverpool L69 7ZE Merseyside England;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Waseda Univ Tokyo 169 Japan;

    Univ Michigan Ann Arbor MI 48109 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Univ Illinois Urbana IL 61801 USA;

    Univ Illinois Urbana IL 61801 USA;

    Univ Oxford Oxford OX1 3RH England;

    CIEMAT E-28040 Madrid Spain;

    Univ Florida Gainesville FL 32611 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Harvard Univ Cambridge MA 02138 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Waseda Univ Tokyo 169 Japan;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Purdue Univ W Lafayette IN 47907 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Illinois Urbana IL 61801 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Univ Athens GR-15771 Athens Greece;

    Univ Pittsburgh Pittsburgh PA 15260 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Athens GR-15771 Athens Greece;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ New Mexico Albuquerque NM 87131 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    MIT 77 Massachusetts Ave Cambridge MA 02139 USA;

    MIT 77 Massachusetts Ave Cambridge MA 02139 USA;

    CIEMAT E-28040 Madrid Spain;

    Univ New Mexico Albuquerque NM 87131 USA;

    Duke Univ Durham NC 27708 USA;

    Rockefeller Univ New York NY 10065 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Harvard Univ Cambridge MA 02138 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Rochester 601 Elmwood Ave Rochester NY 14627 USA;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Tufts Univ Medford MA 02155 USA;

    Wayne State Univ Detroit MI 48201 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Baylor Univ Waco TX 76798 USA;

    Univ Oxford Oxford OX1 3RH England;

    Univ Penn Philadelphia PA 19104 USA;

    Univ Wisconsin Madison WI 53706 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Acad Sinica Inst Phys Taipei 11529 Taiwan;

    Ohio State Univ Columbus OH 43210 USA;

    Yale Univ New Haven CT 06520 USA;

    Michigan State Univ E Lansing MI 48824 USA;

    Michigan State Univ E Lansing MI 48824 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Univ Calif Davis Davis CA 95616 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Carnegie Mellon Univ Pittsburgh PA 15213 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Purdue Univ W Lafayette IN 47907 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Carnegie Mellon Univ Pittsburgh PA 15213 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Karlsruhe Inst Technol Inst Expt Kernphys D-76131 Karlsruhe Germany;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Wayne State Univ Detroit MI 48201 USA;

    Baylor Univ Waco TX 76798 USA;

    Osaka City Univ Osaka 5588585 Japan;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Univ Penn Philadelphia PA 19104 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Waseda Univ Tokyo 169 Japan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Waseda Univ Tokyo 169 Japan;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Univ Florida Gainesville FL 32611 USA;

    Duke Univ Durham NC 27708 USA;

    Karlsruhe Inst Technol Inst Expt Kernphys D-76131 Karlsruhe Germany;

    Univ Penn Philadelphia PA 19104 USA;

    Duke Univ Durham NC 27708 USA;

    Karlsruhe Inst Technol Inst Expt Kernphys D-76131 Karlsruhe Germany;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Purdue Univ W Lafayette IN 47907 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    UCL Mortimer St London WC1E 6BT England;

    Ohio State Univ Columbus OH 43210 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Univ Illinois Urbana IL 61801 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Duke Univ Durham NC 27708 USA;

    Univ Penn Philadelphia PA 19104 USA;

    Univ Geneva CH-1211 Geneva 4 Switzerland;

    Purdue Univ W Lafayette IN 47907 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Yale Univ New Haven CT 06520 USA;

    Yale Univ New Haven CT 06520 USA;

    Ist Nazl Fis Nucl Sez Padova I-35131 Padua Italy;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Karlsruhe Inst Technol Inst Expt Kernphys D-76131 Karlsruhe Germany;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Rockefeller Univ New York NY 10065 USA;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    Comenius Univ Bratislava 84248 Slovakia;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Comenius Univ Bratislava 84248 Slovakia;

    Rockefeller Univ New York NY 10065 USA;

    Univ Liverpool Liverpool L69 7ZE Merseyside England;

    Univ Athens GR-15771 Athens Greece;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Illinois Urbana IL 61801 USA;

    Wayne State Univ Detroit MI 48201 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Univ Liverpool Liverpool L69 7ZE Merseyside England;

    Univ Liverpool Liverpool L69 7ZE Merseyside England;

    Univ Helsinki Dept Phys Div High Energy Phys FIN-00014 Helsinki Finland;

    Rockefeller Univ New York NY 10065 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Michigan Ann Arbor MI 48109 USA;

    Acad Sinica Inst Phys Taipei 11529 Taiwan;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Karlsruhe Inst Technol Inst Expt Kernphys D-76131 Karlsruhe Germany;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Waseda Univ Tokyo 169 Japan;

    Okayama Univ Okayama 7008530 Japan;

    Tufts Univ Medford MA 02155 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Univ Pittsburgh Pittsburgh PA 15260 USA;

    Argonne Natl Lab 9700 S Cass Ave Argonne IL 60439 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Univ Illinois Urbana IL 61801 USA;

    Univ Oxford Oxford OX1 3RH England;

    Duke Univ Durham NC 27708 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Osaka City Univ Osaka 5588585 Japan;

    Univ Helsinki Dept Phys Div High Energy Phys FIN-00014 Helsinki Finland;

    Univ Autonoma Barcelona ICREA Inst Fis Altes Energies E-08193 Bellaterra Barcelona Spain;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    Univ New Mexico Albuquerque NM 87131 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Wisconsin Madison WI 53706 USA;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Carnegie Mellon Univ Pittsburgh PA 15213 USA;

    MIT 77 Massachusetts Ave Cambridge MA 02139 USA;

    Duke Univ Durham NC 27708 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Penn Philadelphia PA 19104 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Univ Illinois Urbana IL 61801 USA;

    Univ Calif Los Angeles Los Angeles CA 90024 USA;

    Univ Wisconsin Madison WI 53706 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    CIEMAT E-28040 Madrid Spain;

    Univ Oxford Oxford OX1 3RH England;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Glasgow Glasgow G12 8QQ Lanark Scotland;

    Univ Penn Philadelphia PA 19104 USA;

    Tufts Univ Medford MA 02155 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    Carnegie Mellon Univ Pittsburgh PA 15213 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Rochester 601 Elmwood Ave Rochester NY 14627 USA;

    Waseda Univ Tokyo 169 Japan;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Michigan Ann Arbor MI 48109 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ New Mexico Albuquerque NM 87131 USA;

    Osaka City Univ Osaka 5588585 Japan;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Calif Davis Davis CA 95616 USA;

    Univ Liverpool Liverpool L69 7ZE Merseyside England;

    Univ Pittsburgh Pittsburgh PA 15260 USA;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Inst Theoret &

    Expt Phys Moscow 117259 Russia;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Tufts Univ Medford MA 02155 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Pittsburgh Pittsburgh PA 15260 USA;

    Univ Autonoma Barcelona ICREA Inst Fis Altes Energies E-08193 Bellaterra Barcelona Spain;

    Univ Glasgow Glasgow G12 8QQ Lanark Scotland;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ New Mexico Albuquerque NM 87131 USA;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Joint Inst Nucl Res RU-141980 Dubna Russia;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Univ Chicago Enrico Fermi Inst 5640 S Ellis Ave Chicago IL 60637 USA;

    Univ Michigan Ann Arbor MI 48109 USA;

    Acad Sinica Inst Phys Taipei 11529 Taiwan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Penn Philadelphia PA 19104 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Texas A&

    M Univ Mitchell Inst Fundamental Phys &

    Astron College Stn TX 77843 USA;

    Comenius Univ Bratislava 84248 Slovakia;

    Michigan State Univ E Lansing MI 48824 USA;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl Sez Padova I-35131 Padua Italy;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Univ Tsukuba Tsukuba Ibaraki 305 Japan;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Univ Florida Gainesville FL 32611 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ist Nazl Fis Nucl I-56127 Pisa Italy;

    Purdue Univ W Lafayette IN 47907 USA;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    Univ Cantabria CSIC Inst Fis Cantabria E-39005 Santander Spain;

    Univ New Mexico Albuquerque NM 87131 USA;

    Ist Nazl Fis Nucl Lab Nazl Frascati POB 13 I-00044 Frascati Italy;

    Univ Penn Philadelphia PA 19104 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Acad Sinica Inst Phys Taipei 11529 Taiwan;

    UCL Mortimer St London WC1E 6BT England;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Univ Penn Philadelphia PA 19104 USA;

    Argonne Natl Lab 9700 S Cass Ave Argonne IL 60439 USA;

    Univ Calif Davis Davis CA 95616 USA;

    Univ Penn Philadelphia PA 19104 USA;

    Univ Michigan Ann Arbor MI 48109 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ohio State Univ Columbus OH 43210 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Ohio State Univ Columbus OH 43210 USA;

    Univ Michigan Ann Arbor MI 48109 USA;

    Univ Geneva CH-1211 Geneva 4 Switzerland;

    Baylor Univ Waco TX 76798 USA;

    Osaka City Univ Osaka 5588585 Japan;

    Osaka City Univ Osaka 5588585 Japan;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Seoul Natl Univ Seoul 151742 South Korea;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Ernest Orlando Lawrence Berkeley Natl Lab Berkeley CA 94720 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Fermilab Natl Accelerator Lab POB 500 Batavia IL 60510 USA;

    Waseda Univ Tokyo 169 Japan;

    Osaka City Univ Osaka 5588585 Japan;

    Duke Univ Durham NC 27708 USA;

    Kyungpook Natl Univ Ctr High Energy Phys Taegu 702701 South Korea;

    Ist Nazl Fis Nucl I-33100 Udine Italy;

    Duke Univ Durham NC 27708 USA;

    Duke Univ Durham NC 27708 USA;

    Ist Nazl Fis Nucl I-40127 Bologna Italy;

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