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, d'Ascenzo N, Datta M, de Barbaro P, Demortier L, Deninno M, D'Errico M, Devoto F, Di Canto A, Di Ruzza B, Dittmann J R, Donati S, D'Onofrio M, Dorigo M, Driutti A, Ebina K, Edgar R, Elagin A, Erbacher R, Errede S, Esham B, Farrington S, Fernández 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, González López O, Gorelov I, Goshaw A T, Goulianos K, Gramellini E, Grosso-Pilcher C, Group R C, Guimaraes da Costa J, 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, Hirschbuehl D, 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, Knoepfel K, 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 H, Liu Q, Liu T, Lockwitz S, Loginov A, Lucchesi D, Lucà A, Lueck J, Lujan P, Lukens P, Lungu G, Lys J, Lysak R, Madrak R, Maestro P, 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, Neu C, Nigmanov T, Nodulman L, Noh S Y, Norniella O, Oakes L, Oh S H, Oh Y D, Oksuzian I, 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, Pianori E, Pilot J, Pitts K, Plager C, Pondrom L, Poprocki S, Potamianos K, Pranko A, Prokoshin F, Ptohos F, Punzi G, Redondo Fernández 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, St Denis R, 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, Vázquez F, Velev G, Vellidis C, Vernieri C, Vidal M, Vilar R, Vizán J, Vogel M, Volpi G, Wagner P, Wallny R, Wang S M, Waters D, Wester W C, 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
Division of High Energy Physics, Department of Physics, University of Helsinki, FIN-00014 Helsinki, Finland and Helsinki Institute of Physics, FIN-00014 Helsinki, Finland.
Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy and University of Padova, I-35131 Padova, Italy.
Phys Rev Lett. 2014 Dec 31;113(26):261804. doi: 10.1103/PhysRevLett.113.261804.
We report a measurement of single top quark production in proton-antiproton collisions at a center-of-mass energy of sqrt[s]=1.96 TeV using a data set corresponding to 7.5 fb(-1) of integrated luminosity collected by the Collider Detector at Fermilab. We select events consistent with the single top quark decay process t→Wb→ℓνb by requiring the presence of an electron or muon, a large imbalance of transverse momentum indicating the presence of a neutrino, and two or three jets including at least one originating from a bottom quark. An artificial neural network is used to discriminate the signal from backgrounds. We measure a single top quark production cross section of 3.04(-0.53)(+0.57) pb and set a lower limit on the magnitude of the coupling between the top quark and bottom quark |Vtb|>0.78 at the 95% credibility level.
我们报告了在费米实验室对撞机探测器收集的对应于7.5 fb⁻¹积分亮度的数据集，在质心能量√s = 1.96 TeV的质子 - 反质子碰撞中对单顶夸克产生的测量。我们通过要求存在一个电子或μ子、表明存在中微子的大横向动量不平衡以及两个或三个喷注（包括至少一个源自底夸克的喷注）来选择与单顶夸克衰变过程t→Wb→ℓνb一致的事件。使用人工神经网络来区分信号与背景。我们测量的单顶夸克产生截面为3.04(-0.53)(+0.57) pb，并在95%置信水平下对顶夸克与底夸克之间耦合强度|Vtb|设定了下限|Vtb|>0.78。
