底重子无 charm 衰变中直接 CP 破坏不对称性的测量。
Measurements of direct CP-violating asymmetries in charmless decays of bottom baryons.
作者信息
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, Cavalli-Sforza M, 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, Giurgiu G, 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, Grinstein S, 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, 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, Martínez M, 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, Piacentino G, Pianori E, Pilot J, Pitts K, Plager C, Pondrom L, Poprocki S, Potamianos K, Pranko A, Prokoshin F, Ptohos F, Punzi G, Ranjan N, 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
机构信息
Division of High Energy Physics, Department of Physics, University of Helsinki, FIN-00014, Helsinki, Finland; 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.
出版信息
Phys Rev Lett. 2014 Dec 12;113(24):242001. doi: 10.1103/PhysRevLett.113.242001. Epub 2014 Dec 9.
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.
我们报告了利用费米实验室Tevatron对撞机探测器升级后的数据，对中性底强子到带电强子对的无 charm 衰变中的直接CP破坏不对称性进行的最终测量。使用对应于9.3 fb⁻¹积分亮度的完整√s = 1.96 TeV质子 - 反质子碰撞数据集，我们测量得到A(Λ(b)⁰→pπ⁻)= +0.06±0.07(统计)±0.03(系统)以及A(Λ(b)⁰→pK⁻)= -0.10±0.08(统计)±0.04(系统)，与无不对称性相符。此外，我们测量得到B(s)⁰→K⁻π⁺和B⁰→K⁺π⁻衰变中的CP破坏不对称性分别为A(B(s)⁰→K⁻π⁺)= +0.22±0.07(统计)±0.02(系统)以及A(B⁰→K⁺π⁻)= -0.083±0.013(统计)±0.004(系统)，它们显著异于零且与当前世界平均值一致。
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