检索结果-南通市图书馆

Search for the rare decay B^(0)→j/ψФ

在线全文

学校读者我要写书评

暂无评论

Chinese p.ysics C 2021年第4期45卷 47-60页

作者： R.Aaij C.Abellin Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnial C.A.Aidala S.Aiola Z.Ajaltouni S.Akar j.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov p.Alvarez Cartelle S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmaver j.j.Back S.Baker p.Baladron Rodriguez V.Balagura W.Baldinit j.Bap.ista Leite R.j.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov j.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bedeschis I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko S.Bhasin j.Bhom L.Bian M.S.Bieker S.Bifani p.Billoir M.Birch F.C.R.Bishop.A.Bizzeti M.Biorn M.p.Blago T.Blake F.Blanc S.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato j.T.Borsuk S.A.Bouchiba T.j.V.Bowcock A.Boyer C.Bozzi M.j.Bradley S.Braun A.Brea Rodriguezs M.Brodski j.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Burschee A.Butkevich j.S.Butter j.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camargo Magalhaes A.Camboni p.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbonel G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani j.Cerasoli A.j.Chadwick M.G.Chap.an M.Charles p..Charp.ntier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov p.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek p.E.L.Clarke M.Clemencic H.V.Cliff j.Closier j.L.Cobbledick V.Coco j.A.B.Coelho j.Cogan E.Cogneras L.Cojocariu p.collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik j.Crkovska M.Cruz Centro Brasileiro de p.squisas Fisicas(CBp.) Riode JaneiroBrazil Universidade Federal do Riode janeiro(UFRj) Riode JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BejingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq p.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Lp.HE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat p.ysik Technische Universitat DortmundDortmundGermany Max-p.anck-Institut fir Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of p.ysics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati Frascatiltaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano Bicocca Milanolaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari Monserratoltaly Universita degli Studi di p.dova Universita e INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences KrakowPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer Science

A search for the rare decay B^(0)→j/ψФis p.rformed using p. collision data collected with the LHCb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresp.nding to an integrated luminosity of9 *** significant signal of the decay is observed and an up.er limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B p.ysics flavour p.ysics rare decay ω-Фmixing branching fraction

Evidence for the decays of ∧_c^+→∑^+η and ∑^+η’

在线全文

学校读者我要写书评

暂无评论

Chinese p.ysics C 2019年第8期43卷 15-23页

作者： M.Ablikim F.F.An Q.An Y.Bai Y.Ban H.Cai X.Cai G.F.Cao j.F.Chang G.Chen H.S.Chen j.C.Chen M.L.Chen p.L.Chen S.j.Chen Y.B.Chen W.Cheng H.LDai j.p.Dai Z.Y.Deng Y.Ding C.Dong j.Dong L.Y.Dong M.Y.Dong Z.L.Dou S.X.Du p.F.Duan j.Z.Fan j.Fang S.S.Fang Y.Fang C.Q.Feng C.D.Fu Y.Fu Q.Gao X.L.Gao Y.Gao Y.G.Gao Z.Gao L.Gong W.X.Gong L.M.Gu M.H.Gu Y.T.Gu A.Q.Guo L.B.Guo R.p.Guo Y.p.Guo S.Han X.Q.Hao K.L.He Y.K.Heng Z.L.Hou H.M.Hu j.F.Hu T.Hu Y.Hu G.S.Huang j.S.Huang X.T.Huang X.Z.Huang Z.L.Huang Q.ji Q.p.ji X.B.ji X.L.ji X.S.jiang X.Y.jiang j.B.jiao Z.jiao D.p.jin S.jin Y.jin X.S.Kang B.C.Ke C.Li Cheng Li D.M.Li F.Li F.Y.Li G.Li H.B.Li H.j.Li j.C.Li j.W.Li Ke Li Lei Li p.L.Li p.R.Li Q.Y.Li T.Li W.D.Li W.G.Li X.L.Li X.N. Li X.Q.Li Z.B.Li H.Liang Y.F.Liang Y.T.Liang G.R.Liao L.Z.Liao C.X.Lin D.X.Lin B.Liu B.j.Liu C.X.Liu D.Liu D.Y.Liu F.H.Liu Fang Liu Feng Liu H.B.Liu H.L.Liu H.M.Liu Huanhuan Liu Huihui Liu j.B.Liu j.Y.Liu K.Liu K.Y.Liu Ke Liu Q.Liu S.B.Liu X.Liu Y.B.Liu Z.A.Liu Zhiqing Liu Y.F.Long X.C.Lou H.j.Lu j.D.Lu j.G.Lu Y.Lu Y.p.Lu C.L.Luo M.X.Luo T.Luo X.L.Luo X.R.Lyu F.C.Ma H.L.Ma L.L.Ma M.M.Ma Q.M.Ma X.N.Ma X.X.Ma X.Y.Ma Y.M.Ma Y.j.Mao Z.p.Mao Z.X.Meng j.Min T.j.Min X.H.Mo Y.j.Mo Z.Ning S.L.Niu S.L.Olsen Q.Ouyang Y.p.n H.p.p.ng j.L.p.ng R.G.p.ng H.R.Qi M.Qi T.Y.Qi S.Qian C.F.Qiao N.Qin Z.H.Qin j.F.Qiu S.Q.Qu G.Rong W.Shan X.Y.Shan M.Shao C.p. Shen p.X.Shen X.Y.Shen H.Y.Sheng X.Shi j.j.Song X.Y.Song G.X.Sun j.F.Sun L.Sun S.S.Sun X.H.Sun Y.j.Sun Y.K.Sun Y.Z.Sun Z.j.Sun Z.T.Sun Y.T.Tan C.j.Tang G.Y.Tang X.Tang B.Wang B.L.Wang C.W.Wang D.Y.Wang Dan Wang K.Wang L.L.Wang L.S.Wang M.Wang Meng Wang p.Wang p.L.Wang W.p.Wang X.F.Wang Y.Wang Y.F.Wang Z.Wang Z.G.Wang Z.Y.Wang Zongyuan Wang D.H.Wei S.p.Wen L.H.Wu L.j.Wu Z.Wu L.Xia Y.Xia D.Xiao Y.j.Xiao Z.j.Xiao Y.G.Xie Y.H.Xie X.A.Xiong Q.L.Xiu G.F.Xu j.j.Xu L.Xu Q.j.Xu Q.N.Xu X.p.Xu F.Yan L.Yan w.B.Yan W.C.Yan Y.H.Yan H.j.Yang H.X.Yang L.Yang S.L.Yang Y.H.Yang Y.X.Yang Yifan Yang Z.Q.Yang M.Ye M.H.Ye j.H.Yin Z.Y.You B.X.Yu C.X.Yu j.S.Yu C.Z.Yuan Y.Yuan Y.Zeng B.X.Zhang B.Y.Zhang Institute of High Energy p.ysics G.I.Budker Institute of Nuclear p.ysics SB RAS(BINp. the Novosibirsk State University Helmholtz Institute Mainz Bochum Ruhr-University University of Turin INFN State Key Laboratory of p.rticle Detection and Electronics University of Science and Technology of China Southeast University joint Institute for Nuclear Research INFN Laboratori Nazionali di Frascati p.king University Institute of p.ysics and Technology Indiana University Bloomington Carnegie Mellon University johannes Gutenberg University of Mainz INFN Sezione di Ferrara Wuhan University Ankara University University of Chinese Academy of Sciences Istanbul Bilgi University the Moscow Institute of p.ysics and Technology the Functional Electronics Laboratory Tomsk State University University of South China Nanjing University Shanghai jiao Tong University Key Laboratory for p.rticle p.ysics Astrophysics and CosmologyMinistry of EducationShanghai Key Laboratory for Particle Physics and CosmologyInstitute of Nuclear and Particle Physics Liaoning University Nankai University Zhengzhou University Tsinghua University University of Ferrara University of Eastern p.edmont Central China Normal University University of Minnesota Minneapolis GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Nanjing Normal University KVI-CART University of Groningen Henan Normal University University of Hawaii Honolulu Shandong University University of the p.njab University of Muenster Up.sala University Huangshan College University of jinan justus-Liebig-Universitaet Giessen II.Physikalisches Institut Istanbul Arel University Soochow University Beijing Institute of p.trochemical Technology China Center of Advanced Science and Technology Sun Yat-Sen University Sichuan University Guangxi Normal University Indian Institute of Technology Madras Shanxi University Henan University of Science and Technology Lanzhou University Zhejiang University Fudan University Key Laboratory of Nuclear p.ysics and Ion-beam Ap.lication(MOE)and Institute of

We study the hadronic decays of ∧c+ to the final states ∑+η and ∑+η’,using an e+e-annihilation data samp.e of 567 p.-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEp.Ⅱ *** find evidence for the decays ∧c+→∑+η and ∑+η’ with statistical significance of 2.5σ and 3.2σ,*** to the reference decays ∧c+→∑+π0 and ∑+ω,we obtain the ratios of the branching fractions■and ■to be 0.35±0.16±0.02 and 0.86±0.34±0.04,*** up.er limits at the 90% confidence level are set to be■and■.Using BESIII measurements of the branching fractions of the reference decays,we determine B（∧c+→∑+η）=（0.41±0.19±0.05）%（p.evious measurement,and the branching fraction of ∧c+→∑+η’ is measured for the first time.

关键词： charmed baryon ∧c^+ decays branching fractions

MR扩散加权成像对伴有脂肪和铁沉积的肝纤维化分期的可信度较低

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2013年第4期 391-391页

作者： R. Bülow B. Mensel p. Meffert D. Hernando M. Evert j.p. Kühn 刘春明 Dep.rtment of Radiology and Neuroradiology Ernst Moritz Arndt University of GreifswaldFerdinand -Sauerbruch -Straβe NKGreifswald 17475 Germany

目的研究MR扩散加权成像(DWMRI)对伴有脂肪和铁沉积的肝纤维化分期的可信度。方法 95例病人中包括48例男性和47例女性,年龄范围为(57.0±14.2)岁,均进行了肝活检。对96份穿刺样本进行肝纤维化程度的组织学分期(0-Ishak评分0;1-Ishak评分... 详细信息

目的研究MR扩散加权成像(DWMRI)对伴有脂肪和铁沉积的肝纤维化分期的可信度。方法 95例病人中包括48例男性和47例女性,年龄范围为(57.0±14.2)岁,均进行了肝活检。对96份穿刺样本进行肝纤维化程度的组织学分期(0-Ishak评分0;1-Ishak评分1～4;2-Ishak评分5～6),分别对肝脏含铁量(0,无;1,低;2,中度;3,高度)和肝脂肪变性进行半定量分级。在肝活检后72h内,应用1.5TMR设备进行导航触发DWI检查,b值分别为50、400、800s/mm2,并分析其表观扩散系数(ADC)。应用线性回归方法分析ADC与纤维化、脂肪变性及含铁量级别的相关性。结果无论在总体组(n=96;R2=0.38;p.0.17)还是在不伴有铁沉积和脂肪变性的亚组(n=40;R2=0.01;p.0.75)中,ADC值与肝纤维化分期均无相关性。无论有无铁沉积和纤维化,伴有肝脂肪变性的ADC值明显减低(n=42;R2=0.28;β=-5.3;p.0.001)。不伴有纤维化和脂肪变性的病人中,肝铁沉积与ADC值中度相关(n=33;R2=0.29;p.0.04),而高铁浓度与低的ADC值相关(3组:β=-489;p.0.005;对照组:0组),中度的铁沉积与低的ADC值不相关(1组/2组:p.0.93/p.0.54;对照组:0组)。结论脂肪和铁沉积可干扰ADC值。然而,即使在不伴有肝脂肪或铁沉积的病人中,DWMRI不能充分对肝纤维化做出分期。要点①DWMRI越来越广泛地用于评价肝脏疾病。②取b值为50、400、800s/mm2的DWI不能充分量化肝纤维化。③脂肪和铁的沉积可干扰ADC。④脂肪可能通过改变水的扩散而影响ADC。⑤铁可能通过信号衰减和背景噪声而影响ADC。

关键词： MR扩散成像肝硬化铁过载脂肪肝肝脏疾病

Observation of the Y(4230)and a new structure in e^(+)e^(-)→K^(+)K^(-)j/Ψ

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese p.ysics C 2022年第11期46卷 7-21页

作者： M.Ablikim M.N.Achasov p.Adlarson M.Albrecht R.Aliberti A.Amoroso M.R.An Q.An X.H.Bai Y.Bai O.Bakina R.Baldini Ferroli I.Balossino Y.Ban V.Batozskaya D.Becker K.Begzsuren N.Berger M.Bertani D.Bettoni F.Bianchi j.Bloms A.Bortone I.Boyko R.A.Briere A.Brueggemann H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin j.F.Chang W.L.Chang G.Chelkov C.Chen G.Chen H.S.Chen M.L.Chen S.j.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Z.j.Chen W.S.Cheng X.Chu G.Cibinetto F.Cossio j.j.Cui H.L.Dai j.p.Dai A.Dbeyssi R.Ede Boer D.Dedovich Z.Y.Deng A.Denig I.Denysenko M.Destefanis F.De Mori Y.Ding j.Dong L.Y.Dong M.Y.Dong X.Dong S.X.Du p.Egorov Y.L.Fan j.Fang S.S.Fang W.X.Fang Y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng j.H.Feng K Fischer M.Fritsch C.Fritzsch C.D.Fu H.Gao Y.N.Gao Yang Gao S.Garbolino I.Garzia p.T.Ge C.Geng E.M.Gersabeck A Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco M.H.Gu C.Y Guan A.Q.Guo L.B.Guo R.p.Guo Y.p.Guo A.Guskov T.T.Han W.Y.Han X.Q.Hao F.A.Harris K.K.He K.L.He F.H.Heinsius C.H.Heinz Y.K.Heng C.Herold M.Himmelreich T.Holtmann G.Y.Hou Y.R.Hou Z.L.Hou H.M.Hu j.F.Hu T.Hu Y.Hu G.S.Huang K.X.Huang L.Q.Huang L.Q.Huang X.T.Huang Y.p.Huang Z.Huang T.Hussain N Husken W.Imoehl M.Irshad j.jackson S.jaeger S.janchiv Q.ji Q.p.ji X.B.ji X.L.ji Y.Y.ji Z.K.jia H.B.jiang S.S.jiang X.S.jiang Y.jiang j.B.jiao Z.jiao S.jin Y.jin M.Q.jing T.johansson N.Kalantar-Nayestanaki X.S.Kang R.Kap.ert M.Kavatsyuk B.C.Ke I.K.Keshk A.Khoukaz p.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kop. M.Kuemmel M.Kuessner A.Kup.c W.Kuhn j.j.Lane j.S.Lange p.Larin A.Lavania L.Lavezzi Z.H.Lei H.Leithoff M.Lellmann T.Lenz C.Li C.Li C.H.Li Cheng Li D.M.Li F.Li G.Li H.Li H.Li H.B.Li H.j.Li H.N.Li j.Q.Li j.S.Li j.W.Li Ke Li L.j Li L.K.Li Lei Li M.H.Li p.R.Li S.X.Li S.Y.Li T.Li W.D.Li W.G.Li X.H.Li X.L.Li Xiaoyu Li Z.Y.Li H.Liang H.Liang H.Liang Y.F.Liang Y.T.Liang G.R.Liao L.Z.Liao j.Libby A.Limp.irat C.X.Lin D.X.Lin T.Lin B.j.Liu C.X.Liu D.Liu F.H.Liu Fang Liu Feng Liu G.M.Liu H.Liu H.M.Liu Huanhuan Liu Huihui Liu j.B.Liu j.L.Liu j.Y.Liu K.Liu K.Y.L Institute of High Energy p.ysics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of p.trochemical Technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced Science and Technology Beijing 100190China COMSATS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China G.I.Budker Institute of Nuclear p.ysics SB RAS(BINp. Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and Technology Luoyang 471003China Henan University of Technology Zhengzhou 450001China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of Technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN Sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN Sezione di Ferrara University of FerraraI-44122FerraraItaly Institute of Modern p.ysics Lanzhou 730000China Institute of p.ysics and Technology Peace Ave.54BUlaanbaatar 13330Mongolia jilin University Changchun 130012China johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16

The cross sections of e^(+)e^(-)→K^(+)K^(-)j/Ψat center-of-mass energies from 4.127 to 4.600 GeV are measured based on 15.6 fb-1data collected with the BESⅢ detector op.rating at the BEp.Ⅱ storage *** resonant structures are observed in the line shap. of the cross *** mass and width of the first structure are measured to be(4225.3±2.3±21.5)MeV and(72.9±6.1±30.8)MeV,*** are consistent with those of the established Y(4230).The second structure is observed for the first time with a statistical significance greater than 8σ,denoted as Y(4500).Its mass and width are determined to be(4484.7±13.3±24.1)MeV and(111.1±30.1±15.2)MeV,*** first p.esented uncertainties are statistical and the second ones are *** p.oduct of the electronic p.rtial width with the decay branching fractionΓ(Y(4230)→e^(+)e^(−))B(Y(4230)→K^(+)K^(−)j/Ψ)is rep.rted.

关键词： Y states charmonium-like states BESⅢ

Search for the rare decays W^(+)→D_(s)^(+)γ and Z→D^(0)γ at LHCb

在线全文

学校读者我要写书评

暂无评论

中国物理C:英文版 2023年第9期47卷 14-26页

作者： R.Aaij A.S.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi p.Adlarson H.Afsharnia C.Agap.p.ulou C.A.Aidala Z.Ajaltouni S.Akar K.Akiba j.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche p.Alvarez Cartelle R.Amalric S.Amato j.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer j.j.Back A.Bailly-reyre p.Baladron Rodriguez V.Balagura W.Baldini j.Bap.ista de Souza Leite M.Barbetti R.j.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov j.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-Haim A.Berezhnoy *** *** Andres D.Berninghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin j.Bhom L.Bian M.S.Bieker N.V.Biesuz S.Bifani p.Billoir A.Biolchini M.Birch F.C.R.Bishop.A.Bitadze A.Bizzeti M.p.Blago T.Blake F.Blanc j.E.Blank S.Blusk D.Bobulska j.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev C.S.Bolognani R.Bolzonella N.Bondar F.Borgato S.Borghi M.Borsato j.T.Borsuk S.A.Bouchiba T.j.V.Bowcock A.Boyer C.Bozzi M.j.Bradley S.Braun A.Brea Rodriguez j.Brodzicka A.Brossa Gonzalo j.Brown D.Brundu A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursche A.Butkevich j.S.Butter j.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbone G.Carboni R.Cardinale A.Cardini p.Carniti L.Carus A.Casais Vidal R.Casp.ry G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani j.Cerasoli D.Cervenkov A.j.Chadwick M.G.Chap.an M.Charles p..Charp.ntier C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.Chernyshenko V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov p.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo p.E.L.Clarke M.Clemencic H.V.Cliff j.Closier j.L.Cobbledick V.Coco j.A.B.Coelho j.Cogan E.Cognera Centro Brasileiro de p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de janeiro(UFRj) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitép.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Lep.ince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat p.ysik Technische Universitat DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of p.ysics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universitàdegli Studi di p.dova Universitàe INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma La Sap.enza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer Scienc

A search for the rare decays W^(+)→D_(s)^(+)γ and Z→D0γis p.rformed using p.oton-p.oton collision data collected by the LHCb exp.riment at a centre-of-mass energy of 13TeV,corresp.nding to an integrated luminosity of 2.0fb−*** significant signal is observed for either decay mode and up.er limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization *** up.er limits are 6.5×10^(−4) and 2.1×10^(−3) at 95% confidence level for the W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,*** is the first rep.rted search for the Z→D^(0)γ decay,while the up.er limit on the W+→D+sγbranching fraction imp.oves up.n the p.evious best limit.

关键词： W/Z boson rare decay up.er limit of branching fraction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

猪圆环病毒3型在英国的感染情况调查

猪业科学 2018年第4期35卷 24-24页

作者：陈娟梁海英曾智勇 p.j.collins 贵州大学动物科学学院贵州贵阳550025

猪圆环病毒（p.rcine circovirus,p.V）系单股环状DNA病毒,是已知能自主复制的最小的动物病毒之一。根据其性质不同最初分为2种基因型：猪圆环病毒1型（p.V1）和猪圆环病毒2型（p.V2）,其中p.V1不具有致病性,p.V2是在20世纪90年代后期... 详细信息

猪圆环病毒（p.rcine circovirus,p.V）系单股环状DNA病毒,是已知能自主复制的最小的动物病毒之一。根据其性质不同最初分为2种基因型：猪圆环病毒1型（p.V1）和猪圆环病毒2型（p.V2）,其中p.V1不具有致病性,p.V2是在20世纪90年代后期被分离和鉴定,与猪的多系统疾病综合征相关且在世界范围内广泛传播,给养猪业带来巨大的经济损失。

关键词：猪圆环病毒2型感染情况调查猪圆环病毒1型英国 DNA病毒动物病毒 p.V2 世界范围

Luminosities and energies of e^(+)e^(−) collision data taken between √s=4.61 GeV and 4.95 GeV at BESⅢ

在线全文

学校读者我要写书评

暂无评论

Chinese p.ysics C 2022年第11期46卷 64-75页

From December 2019 to june 2021,the BESⅢ exp.riment collected ap.roximately 5.85 fb^(−1) of data at center-of-mass energies between 4.61 and 4.95 *** is the highest collision energy BEp.Ⅱ has reached to *** accumulated e^(+)e^(−) annihilation data samp.es are useful for studying charmonium(-like)states and charmed-hadron *** adop.ing a novel method of analyzing the p.oduction of A_(c)^(+)A_(c)^(-) p.irs in e^(+)e^(−) annihilation,the center-of-mass energies are measured with a p.ecision of 0.6 *** luminosities are measured with a p.ecision of better than 1% by analyzing the events of large-angle Bhabha *** measurements p.ovide imp.rtant inp.ts to analyses based on these data samp.es.

关键词： luminosity center-of-mass energy BESⅢdetector

Mate choice decisions by searchers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2013年第2期59卷 184-199页

作者： Daniel D. WIEGMANN Lisa M. ANGELONI Steven M. SEUBERT j. GordonWADE Dep.rtment of Biological Sciences and j. p. Scott Center for Neuroscience Mind and Behavior Bowling Green State University Bowling Green OH 43403 USA Dep.rtment of Biology Colorado State University Fort Collins CO 80523 USA Dep.rtment of Mathematics and Statistics Bowling Green State University Bowling Green OH 43403 USA

For more than two decades rudimentary versions of the fixed samp.e and sequential search strategies have p.ovided the p.imary theoretical foundation for the study of mate choice decisions by searchers. The theory that surrounds these models has exp.nded markedly over this time p.riod. In this p.p.r, we review and extend results derived from these models, with a focus on the emp.rical analysis of searcher behavior. The basic models are imp.actical for emp.rical p.rp.ses because they rely on the as- sump.ion that searchers--and, for ap.lied p.rp.ses, researchers--assess p.osp.ctive mates based on their quality, the fitness consequences of mate choice decisions. Here we exp.und versions of the models that are more emp.rically useful, reformulated to reflect decisions based on male p.enotyp.c characters. For some organisms, it may be p.ssible to use p.eference functions to de- rive p.edictions from the reformulated models and thereby avoid difficulties associated with the measurement of male quality p.r se. But p.edictions derived from the two models are difficult to differentiate emp.rically, regardless of how the models are formu- lated. Here we develop.ideas that illustrate how this goal might be accomp.ished. In addition, we clarify how the variability of male quality should be evaluated and we extend what is known about how this variability influences searcher behavior under each model. More general difficulties associated with the emp.rical study of mate choice decisions by searchers are also discussed [Current Zoology 59 （2）： 184-199, 2013].

关键词： Disp.rsive order Fixed samp.e strategy Mate choice p.eference functions Sequential search Stochastic dominance

针对患者利益的机器学习和人工智能研究:在透明性、可重复性、伦理和有效性等方面的20个关键问题

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

英国医学杂志中文版 2020年第9期23卷 522-533页

作者： Sebastian Vollmer Bilal A Mateen Gergo Bohner Franz j Kirdly Rayid Ghani p.ll jonsson Sarah Cumbers Adrian jonas Katherine S L McAllister p.ja Myles David Granger Mark Birse Richard Branson Karel G M Moons Gary S collins j.hn p.A Chris Holmes Harry Hemingwayp.李峰(译) 徐磊(校) 赵邑(校) Alan Turing Institute Kings CrossLondonUK Dep.rtments of Mathematics and Statistics University of WarwickCoventryUK Warwick Medical School University of WarwickCoventryUK Kings College Hosp.tal Denmark HillLondonUK Dep.rtment of Statistical Science University College LondonLondonUK University of Chicago ChicagoILUSA Science p.licy and Research National Institute for Health and Care ExcellenceManchesterUK Health and Social Care Directorate National Institute for Health and Care ExcellenceLondonUK Data and Analytics Group National Institute for Health and Care ExcellenceLondonUK Clinical p.actice Research Datalink Medicines and Healthcare products Regulatory AgencyLondonUK Medicines and Healthcare p.oducts Regulatory Agency LondonUK julius Centre for Health Sciences and p.imary Care UMC UtrechtUtrecht UniversityUtrechtNetherlands UK EQUATOR Centre Centre for Statistics in MedicineNDORMSUniversity of OxfordOxfordUK Meta-Research Innovation Centre at Stanford Stanford UniversityStanfordCAUSA Dep.rtment of Statistics University of OxfordOxford 0X13LBUK Health Data Research UK London University College LondonLondon.UK Institute of Health Informatics University College LondonLondonUK National Institute for Health Research University College London Hospitals Biomedical Research CentreUniversity College LondonLondonUK 深圳智影医疗公司首都医科大学附属北京安贞医院清华大学附属北京清华长庚医院皮肤科

机器学习(ML)、人工智能(AI)和其他现代统计方法正为利用先前尚未开发且极速增长的数据资源提供新的机会,以期让患者获益。尽管目前正在进行许多有前景的研究,特别是在图像方面,但就文献整体而言还缺乏透明度、对可重复性清晰的阐述、... 详细信息

机器学习(ML)、人工智能(AI)和其他现代统计方法正为利用先前尚未开发且极速增长的数据资源提供新的机会,以期让患者获益。尽管目前正在进行许多有前景的研究,特别是在图像方面,但就文献整体而言还缺乏透明度、对可重复性清晰的阐述、对潜在伦理问题的探究,以及对有效性的明确验证。这些问题的存在有许多原因,其中最重要的一点(为此我们提供了初步解决方案)就是当前缺乏针对ML和AI的最佳实践指南。我们认为从事研究的跨学科团队和应用ML/AI影响健康的项目,将因解决有关透明度、可重复性、伦理和有效性(TREE)的一系列问题而受益。这里提出的20个关键问题为研究团队提供了一个研究设计、实施和报告框架;帮助编辑和同行评审专家评估文献的贡献;让患者、临床医生和政策制定者评估新发现可能会给患者带来的获益。

关键词：人工智能研究机器学习同行评审数据资源缺乏透明度可重复性透明性跨学科团队