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Arabidopsis FtsZ2-1 and FtsZ2-2 Are Functionally Redundant, But FtsZ-Based Plastid Division Is Not Essential for chloroplast Partitioning or Plant Growth and Development

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molecular Plant 2009年第6期2卷 1211-1222页

作者： Aaron j. Schmitz jonathan m. Glynn bradley j.S.c. Olson Kevin D. Stokes Katherine W. Osteryoung Department of Plant Biology 166 Plant Biology Bldg Michigan State University East Lansing MI 48824-1312 USA cell and molecular Biology Program Michigan State University East Lansing MI 48824 USA Department of Energy-Plant Research Laboratory Michigan State University East Lansing MI 48824 USA Genetics Program Michigan State University East Lansing MI 48824 USA Biochemistry and molecular Biology Program Michigan State University East Lansing MI 48824 USA Present address: The Salk Institute for Biological Studies Plant Molecular and Cellular Biology Laboratory La Jolla CA 92037 USA Present address: mycobacteria and Brucella Section NVSL/APHIS/USDA 1920 Dayton Ave Ames IA 50010 USA

FtsZ1 and FtsZ2 are phylogenetically distinct families of FtsZ in plants that co-localize to mid-plastid rings and facilitate division of chloroplasts. In plants, altered levels of either FtsZ1 or FtsZ2 cause dose-dependent defects in chloroplast division; thus, studies on the functional relationship between FtsZgenes require careful manipulation of FtsZ levels in vivo. To define the functional relationship between the two FtsZ2 genes in Arabidopsis thaliana, FtsZ2-1 and FtsZ2-2, we expressed FtsZ2-1 in an ftsZ2-2 null mutant, and vice versa, and determined whether the chloroplast division defects were rescued in plants expressing different total levels of FtsZ2. Full rescue was observed when either the FtsZ2-1 or FtsZ2-2 level approximated total FtsZ2 levels in wild-type （WT）. Additionally, FtsZ2-2 interacts with ARc6, as shown previously for FtsZ2- 1. These data indicate that FtsZ2-1 and FtsZ2-2 are functionally redundant for chloroplast division in Arabidopsis. To rigorously validate the requirement of each FtsZ family for chloroplast division, we replaced FtsZ1 with FtsZ2 in vivo, and vice versa, while maintaining the FtsZ level in the transgenic plants equal to that of the total level in WT. chloroplast division defects were not rescued, demonstrating conclusively that FtsZ1 and FtsZ2 are non-redundant for maintenance of WT chloroplast numbers. Finally, we generated ftsZtriple null mutants and show that plants completely devoid of FtsZ protein are viable and fertile. As plastids are presumably essential organelles, these findings suggest that an FtsZ-independent mode of plastid partitioning may occur in higher plants.

关键词： chloroplast plastid division FtsZ ARc6 PDV1.

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DNA末端定量及其应用的研究

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生物化学与生物物理进展 2000年第5期27卷 528-533页

作者：彭黎明江虹 j.j.LIUc.j.bradley 华西医科大学附属第一医院医检专业成都610041 Department of Pathology Univesity of Melbourne Austin Hospital

为定量DNA断裂末端评价DNA的降解程度 ,以饱和标记 (TdT)法定量DNA末端最大标记量 (Lmax) ;并用流式细胞分析 (FcA)、原位DNA末端标记 (TUNEL)和琼脂糖电泳检测或标记DNA降解片段 .结果发现 :a TdT法最低检测限 5ngDNA ,线性范围为 5～ ... 详细信息

为定量DNA断裂末端评价DNA的降解程度 ,以饱和标记 (TdT)法定量DNA末端最大标记量 (Lmax) ;并用流式细胞分析 (FcA)、原位DNA末端标记 (TUNEL)和琼脂糖电泳检测或标记DNA降解片段 .结果发现 :a TdT法最低检测限 5ngDNA ,线性范围为 5～ 5 0 0 0ng ,较检测DNA降解片段的琼脂糖电泳敏感 2 0 0倍以上 ;b 地塞米松 (DEX)诱导淋巴瘤 (Raji)细胞凋亡产生的Lmax呈DEX剂量与诱导时间依赖性增加 ;c 自发性高血压大鼠 (SHR)心肌的Lmax呈年龄依赖性增加并与正常对照鼠 (WKY)相比差异非常显著 (P max与FcA、TUNEL或电泳分析的相关性良好 (r >0 98) .TdT法定量Lmax敏感、特异、准确 ,可应用于分子生物学、细胞生物学。

关键词： DNA末端饱和标记 DNA降解细胞凋亡 TdT法

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Developing one-dimensional implosions for inertial confinement fusion science

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High Power Laser Science and Engineering 2016年第4期4卷 1-7页

作者： j.L.Kline S.A.Yi A.N.Simakov R.E.Olson D.c.Wilson G.A.Kyrala T.S.Perry S.H.Batha E.L.Dewald j.E.Ralph D.j.Strozzi A.G.macPhee D.A.callahan D.Hinkel O.A.Hurricane R.j.Leeper A.B.Zylstra R.R.Peterson B.m.Haines L.Yin P.A.bradley R.c.Shah T.Braun j.Biener B.j.Kozioziemski j.D.Sater m.m.Biener A.V.Hamza A.Nikroo L.F.Berzak Hopkins D.Ho S.LePape N.B.meezan D.S.montgomery W.S.Daughton E.c.merritt T.cardenas E.S.Dodd Los Alamos National Laboratory Lawrence Livermore National Laboratory

Experiments on the National Ignition Facility show that multi-dimensional effects currently dominate the implosion performance. Low mode implosion symmetry and hydrodynamic instabilities seeded by capsule mounting features appear to be two key limiting factors for implosion performance. One reason these factors have a large impact on the performance of inertial confinement fusion implosions is the high convergence required to achieve high fusion *** tackle these problems, a predictable implosion platform is needed meaning experiments must trade-off high gain for performance. LANL has adopted three main approaches to develop a one-dimensional(1D) implosion platform where 1D means measured yield over the 1D clean calculation. A high adiabat, low convergence platform is being developed using beryllium capsules enabling larger case-to-capsule ratios to improve symmetry. The second approach is liquid fuel layers using wetted foam targets. With liquid fuel layers, the implosion convergence can be controlled via the initial vapor pressure set by the target fielding temperature. The last method is double shell targets. For double shells, the smaller inner shell houses the DT fuel and the convergence of this cavity is relatively small compared to hot spot ignition. However,double shell targets have a different set of trade-off versus advantages. Details for each of these approaches are described.

关键词： beryllium capsules double shells inertial confinement fusion liquid layers

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Generation and optical display of a binary-sampled phase-only hologram

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chinese Optics Letters 2016年第1期14卷 12-15页

作者： P. W. m. Tsang Y.-T. chow T.-c. Poon j.-P. Liu Department of Electronic Engineering City University of Hong Kong Hong Kong SAR China bradley Department of Electrical and computer Engineering Virginia Tech Blacksburg VA 24061 USA Department of Photonics Feng Chia University No. 100 Wenhwa Rd. Taichung 407 China

Past research has demonstrated that a phase-only hologram can be obtained by down-sampling the intensity image of the object scene prior to the generation of the hologram. In this Letter, we extend the method to the generation of binary phase-only holograms. A hologram derived with our proposed method is referred to as a binary-sampled phase-only hologram （BSPOH）. Being different from the parent scheme, we have adopted an off- axis configuration in the generation of the BSPOH to avoid the quantization noise, the zeroth-order light, and the conjugate lights. An experimental evaluation reveals that the reconstructed image of the BSPOH is of good quality, and only contains slight amount of noise.

关键词： Bins Holographic displays Lithography

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A novel non-invasive method for predicting bone mineral density and fracture risk using demographic and anthropometric measures

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Sports medicine and Health Science 2023年第4期5卷 308-313页

作者： justin Aflatooni Steven martin Adib Edilbi Pranav Gadangi William Singer Robert Loving Shreya Domakonda Nandini Solanki Patrick c.mcculloch bradley Lambert Orthopedic Biomechanics Research Laboratory Department of Orthopedics and Sports MedicineHouston Methodist HospitalHoustonTXUSA Sydney&j.L.Huffines Institute for Sports medicine&Human Performance Department of Health and KinesiologyTexas A&M UniversityCollege StationTXUSA

Fractures are costly to treat and can significantly increase *** dual-energy x-ray absorptiometry(DEXA)is used to screen at risk people with low bone mineral density(BmD),not all areas have access to *** sought to create a readily accessible,inexpensive,high-throughput prediction tool for BmD that may identify people at risk of fracture for further *** and demographic data were collected from 492 volunteers(♂275,♀217;[44-20]years;Body mass Index(BmI)=[27.6-6.0]kg/m^(2))in addition to total body bone mineral content(Bmc,kg)and BmD measurements of the spine,pelvis,arms,legs and total ***-linear-regression with step-wise removal was used to develop a two-step prediction model for Bmc followed by *** selection was determined by the highest adjusted R2,lowest error of estimate,and lowest level of variance inflation(α=0.05).Height(HTcm),age(years),sex^(m=1,f=0),%body fat(%fat),fat free mass(FFmkg),fat mass(Fmkg),leg length(LLcm),shoulder width(SHWDTHcm),trunk length(TRNKLcm),and pelvis width(PWDTHcm)were observed to be significant predictors in the following two-step model(pmc(kg)=(0.0063×HT)+(-0.0024×AGE)+(0.1712×SEX^(m=1,f=0))+(0.0314×FFm)+(0.001×Fm)+(0.0089×SHWDTH)+(-0.0145×TRNKL)+(-0.0278×PWDTH)-0.5073;R^(2)=0.819,***2:Total body BmD(g/cm^(2))=(-0.0028×HT)+(-0.0437×SEX^(m=1,f=0))+(0.0008×%FAT)+(0.2970×Bmc)+(-0.0023×LL)+(0.0023×SHWDTH)+(-0.0025×TRNKL)+(-0.0113×PWDTH)+1.379;R^(2)=0.89,*** models were also developed to predict leg,arm,spine,and pelvis BmD(R^(2)=0.796-0.864,pmising tools for identifying individuals with low BmD at risk of fracture who would benefit from further evaluation,especially in the resource or time restricted setting.

关键词： Bone Bone density Fracture Fracture risk Assessment Osteoporosis

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An enhanced method for fast generation of hologram sub-lines

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chinese Optics Letters 2009年第12期7卷 1092-1096页

作者： P. W. m. Tsang j. P. Liu K. W. K. cheung T.-c. Poon Department of Electronic Engineering City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong SAR China Department of Photonics Feng Chia University No. 100 Wenhwa Rd. Seatwen Taichung 40724 China bradley Department of Electrical and computer Engineering Virginia Tech Blacksburg Virginia 24061 USA

Sub-lines are one-dimensional diffraction patterns representing the light beams emerging from horizontal planes of an object image. Past research has demonstrated that the sub-lines can be encapsulated as a multi-bank filtering process, and implemented with a field programmable gate array （FPGA） device. As the complexity of the filters is high, their length and the number of input pins have to be reduced substantially, hence leading to degradation on the reconstructed images. We propose an enhanced method to overcome the problem by binarizing the filters＇ coefficients, and half-toning the pixel intensities of the object image. Experimental evaluation reveals that our method results in reconstructed images are superior to that obtained with the parent method.

关键词： Diffraction Field programmable gate arrays (FPGA) Holographic interferometry

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Two disulfide mutants in domain I of <i>Bacillus thuringiensis</i>cry3Aa δ-endotoxin increase stability with no effect on toxicity

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Advances in Biological chemistry 2012年第2期2卷 123-131页

作者： Sheng-jiun Wu Alvaro m. Florez bradley j. Homoelle Donald H. Dean Oscar Alzate Biochemistry Department Ohio State University Columbus USA Department of cell and Developmental Biology University of North Carolina Chapel Hill USA Laboratorio de Biología molecular y Biotecnología Facultad de Medicina Universidad de Santander (UDES) Campus Univer- sitario Bucaramanga Colombia

To increase protein stability and test protein function, three double-cysteine mutations were individually introduced by protein engineering into the cysteine-free cry3Aa δ-endotoxin from Bacillus thuringiensis. These mutations were designed to create disulfide bonds between α-helices 2 and 5 (positions 110 - 193), and α-helices 5 and 7 (positions 195 - 276 and 198 - 276). comparison of the cD spectra of the wild-type and the double-cysteine mutant proteins indicates a tighter helical packing consistent with formation of at least two of the disulfide bonds between the central and the outer helices. Thermal stability analysis indi-cates that potential covalent linkages between the central α-helix 5 and the other helices increase resistance to thermal denaturation by 10?c to 14?c com-pared to the thermal stability of the wild-type protein. Spectroscopic analysis of the disulfide-specific absorbance band indicates that the double mutant proteins are more stable to temperature and denaturant (guanidine hydrochloride) than the wild-type protein, as a result of the formation of two of the disulfide bridges. These results indicate that the double muta-tions m110c/F193c and A198c/V276c successfully established disulfide bonds, resulting in a more stable structure of the entire toxin. Despite the increase in stability and structural changes introduced by the disulfide bonds, no effect on toxicity was observed. A possible mechanism involving the insertion of all of domain I of cry3Aa toxin into the target membrane accounts for these observations.

关键词： Disulfide Bonds cD Spectra cry3Aa Site Directed mutagenesis

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Search for the doubly heavy baryons Ωbc0 and Ξbc0 decaying to Λc+π- and Ξc+π-

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chinese Physics c 2021年第9期45卷 14-25页

作者： R.Aaij c.Abellán Beteta T.Ackernley B.Adeva m.Adinolfi H.Afsharnia 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.Bachmayer j.j.Back P.Baladron Rodriguez V.Balagura W.Baldini j.Baptista 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.Bedeschi 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 A.Bertolin c.Betancourt F.Betti Ia.Bezshyiko S.Bhasin j.Bhom L.Bian m.S.Bieker S.Bifani P.Billoir m.Birch F.c.R.Bishop A.Bitadze A.Bizzeti m.Bj?rn 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 Rodriguez m.Brodski j.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura c.Burr A.Bursche 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.campana A.F.campoverde Quezada S.capelli L.capriotti A.carbone 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.chapman m.charles Ph.charpentier G.chatzikonstantinidis c.A.chavez Barajas m.chefdeville c.chen S.chen A.chernov 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.crkovská m.cruz Torres R.currie c.L.Da Silva E.Dall'Occo j.Dalseno c.D'Amb University of Edinburgh Horia Hulubei National Institute of Physics and Nuclear Engineering INFN Sezione di Bari Università di Bari Los Alamos National Laboratory (LANL) Van Swinderen Institute University of Groningen Universiteit maastricht AGH-University of Science and Technology Faculty of Physics and Applied computer Science Université clermont Auvergne Università di cagliari Institute for Nuclear Research of the National Academy of Sciences (KINR) School of Physics University college Dublin NSc Kharkiv Institute of Physics and Technology (NSc KIPT) INFN Sezione di Perugia STFc Rutherford Appleton Laboratory School of Physics and Astronomy monash University Novosibirsk State University cNRS/IN2P3 Department of Physics and Astronomy Uppsala University Università di Genova School of Physics State Key Laboratory of Nuclear Physics and Technology Peking University National center for Nuclear Research (NcBj) Università di Roma Tor Vergata Pontifícia Universidade católica do Rio de janeiro (PUc-Rio) Universidade Federal do Triangulo mineiro (UFTm) Institute of Particle Physics LPc central china Normal University Hangzhou Institute for Advanced Study UcAS Instituto de Fisica corpuscular centro mixto Universidad de Valencia-cSIc Nikhef National Institute for Subatomic Physics and VU University Amsterdam National Research Tomsk Polytechnic University AGH-University of Science and Technology Faculty of computer Science Electronics and Telecommunications University of michigan Università di Siena Università di Padova Scuola Normale Superiore National Research centre Kurchatov Institute Università degli Studi di milano mSU-Iligan Institute of Technology (mSU-IIT) Università di Firenze INFN Sezione di Roma La Sapienza Institut für Physik Universit?t Rostock INFN Sezione di milano Departamento de Fisica Universidad Nacional de colombia Universit?t Bonn-Helmholtz-Institut für Strahlen und Kernphysik Hanoi University of Science Università di Pisa P.N. Lebedev Physical Institute Russian Academy of Science (LPI RAS) Università

The first search for the doubly heavy Ωbc0baryon and a search for the Ξbc0baryon are performed using pp collision data collected via the LHcb experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresponding to an integrated luminosity of 5.2 *** baryons are reconstructed via their decays to ∧c+π-andΞc+π-.No significant excess is found for invariant masses between 6700 and 7300 meV/c2,in a rapidity range from2.0 to 4.5 and a transverse momentum range from 2 to 20 meV/*** limits are set on the ratio of the Ωbc0andΞbc0production cross-section times the branching fraction to ∧c+π-（Ξc+π-） relative to that of the ∧b0（Ξb0） baryon,for different lifetime hypotheses,at 95% confidence *** upper limits range from 0.5×10-4to 2.5×10-4for theΩbc0→∧c+π-(Ξbc0→∧c+π-) decay,and from 1.4×10-3to 6.9×10-3for the Ωbc0→Ξc+π-(Ξbc0→Ξc+π-) decay,depending on the considered mass and lifetime of the Ωbc0(Ξbc0) baryon.

关键词： B physics quarkonium spectroscopy heavy quark production

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Search for the rare decay B^(0)→j/ψФ

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chinese Physics 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.Baptista 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.campana D.H.campora Perez A.F.campoverde Quezada S.capelli L.capriotti 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.chapman m.charles Ph.charpentier 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 Pesquisas Fisicas(cBPF) Riode JaneiroBrazil Universidade Federal do Riode janeiro(UFRj) Riode JaneiroBrazil center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of chinese Academy of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BejingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany max-Planck-Institut fir Kernphysik(mPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics 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 Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish 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 performed using Pp collision data collected with the LHcb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresponding to an integrated luminosity of9 *** significant signal of the decay is observed and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B physics flavour physics rare decay ω-Фmixing branching fraction

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

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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.Agapopoulou 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.Baptista 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.campana D.H.campora Perez A.F.campoverde Quezada S.capelli L.capriotti A.carbone G.carboni R.cardinale A.cardini P.carniti L.carus A.casais Vidal R.caspary G.casse m.cattaneo G.cavallero V.cavallini S.celani j.cerasoli D.cervenkov A.j.chadwick m.G.chapman m.charles Ph.charpentier 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 Pesquisas Físicas(cBPF) Rio de JaneiroBrazil Universidade Federal do Rio de janeiro(UFRj) Rio de JaneiroBrazil center for High Energy Physics Tsinghua UniversityBeijingChina Institute Of High Energy Physics(IHEP) BeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of chinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Université Savoie mont Blanc CNRSIN2P3-LAPPAnnecyFrance Universitéclermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany max-Planck-Institut für Kernphysik(mPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics 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 Padova Universitàe INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics 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 performed using proton-proton collision data collected by the LHcb experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−*** significant signal is observed for either decay mode and upper limits on their branching fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization *** upper 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 reported search for the Z→D^(0)γ decay,while the upper limit on the W+→D+sγbranching fraction improves upon the previous best limit.

关键词： W/Z boson rare decay upper limit of branching fraction

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