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

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−1.No 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 channels.The 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,respectively.This 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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Search for the doubly heavy baryon Ξ_(bc)^(+)→ decaying to J/ψΞ_(c)^(+)

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中国物理C:英文版 2023年第9期47卷 1-13页

作者： R.Aaij A.S.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva m.Adinolfi H.Afsharnia C.Agapopoulou C.A.Aidala S.Aiola Z.Ajaltouni S.Akar K.Akiba J.Albrecht F.Alessio m.Alexander A.Alfonso Albero Z.Aliouche P.Alvarez Cartelle 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.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 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 S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev N.Bondar 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 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.Camargo magalhaes P.Campana D.H.Campora Perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli 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.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke 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 Fakultät Physik Technische Universität DortmundDortmundGermany max-Planck-Institut für Kernphysik(mPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universität 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 first search for the Ξ_(bc)^(+)J/ψΞ_(c)^(+) decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with a local (global) significance of 4.3(2.8) and 4.1(2.4) standard deviations at masses of 6571 and 6694 meV/c2, respectively. Upper limits are set on the Ξ+bc baryon production cross-section times the branching fraction relative to that of the B+c→J/ψD+s decay at centre-of-mass energies of 8 and 13 TeV, in the Ξ+bc and in the B+c rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to 20GeV/c, respectively. Upper limits are presented as a function of the Ξ+bc mass and lifetime.

关键词： QCD B physics charm physics spectroscopy

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在早发心血管疾病患者中用聚合酶链反应—单链构像多态性方法探索p66Shc长寿基因的遗传变异

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中国动脉硬化杂志 2006年第8期14卷 704-704页

作者： Sentinelli F Romeo S barbetti F Berni A Filippi E Fanelli m 陈安平

背景动脉粥样硬化实验研究数据提示候补基因中可能包含长寿基因p66Shc。p66Shc基因是细胞内活性氧增加的决定因素,影响核酸氧化损伤的程度。p66Shc^-t-小鼠全身各组织的氧化应激降低,血浆低密度脂蛋白氧化性减弱,动脉粥样硬化损伤也相... 详细信息

背景动脉粥样硬化实验研究数据提示候补基因中可能包含长寿基因p66Shc。p66Shc基因是细胞内活性氧增加的决定因素,影响核酸氧化损伤的程度。p66Shc^-t-小鼠全身各组织的氧化应激降低,血浆低密度脂蛋白氧化性减弱,动脉粥样硬化损伤也相应减轻。因此,p66Shc可能在调控体内氧化应激和血管功能障碍中起关键作用。方法用聚合酶链反应一单链构像多态性方法检测了78例早发冠状动脉病变患者(平均年龄48.5±6岁)和93个长寿者(平均年龄89±6岁)的p66Shc这个Shc基因特定区域及其上游启动子的序列变异。结果发现两条变异链,序列分析显示两个单核苷酸变异:在p66Shc调节区是.354T>C,在p66特定区域(CH2区)是92C>T。这两种变异以前未见报道。首次仅在两个杂合子携带者(一个是冠状动脉疾病患者,一个是长寿者)发现的取代现象部分修改了Sp1转录因子公认的核苷酸序列。CH2区的92C>T导致第31密码子氨基酸替换(脯氨酸被亮氨酸取代,P31L),而且仅在一个杂舍子冠状动脉病变者中发现。在纯合子受试者中没有发现这两个变异的单核苷酸序列。结论从171个受试者中仅发现2个p66Shc基因序列变异,且只在杂合子中被发现。联想到其他研究,我们观察的结果提示,p66Shc基因的重大变异是非常少见的。而这种基因变异可能与冠状动脉疾病的遗传易感性无关。[第一段]

关键词：单链构像多态性心血管疾病患者聚合酶链反应遗传变异长寿基因冠状动脉病变动脉粥样硬化

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芸薹属油菜对菌核病的耐病性(英文)

芸薹属油菜对菌核病的耐病性(英文)

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第十二届国际油菜大会

作者： Rajender Singh Dhiraj Singh martin barbetti Harbinder Singh Somveer Nimbal S.S.Banga Arvind Kumar Krishnapillai Sivasithamparam P.Salisbury Wayne Burton Deptt.of Plant Breeding C.C.S.Haryana Agricultural UniversityHisar 125004India Deptt.of Plant Breeding C.C.S.Haryana Agricultural UniversityHisar 125004India School of Plant Biology Faculty of Natural and Agricultural SciencesThe University of Western Australia35 Stirling HighwayCrawley W.A.6009Australia Deptt.of Plant Breeding C.C.S.Haryana Agricultural UniversityHisar 125004India Deptt.of Plant Breeding C.C.S.Haryana Agricultural UniversityHisar 125004India Department of Plant Breeding Punjab Agricultural UniversityLudhiana 141004India National Research Centre on Rapeseed-mustard SewarBharatpur 321303India School of Earth and Geographical Sciences Faculty of Natural and Agricultural SciencesThe University of Western Australia35 Stirling HighwayCrawleyW.A.6009Australia School of Agriculture and Food Systems The University of MelbourneVictoria 3010 Australia Primary Industries Research Victoria Natimuk RdHorshamVictoria 3401Australia

由核盘菌Sclerotinia sclerotiorum（Lib）De Bary引起的芸薹属物种的菌核病是一种破坏性疾病,在全球范围内各油菜生产国都形成了对芸薹属物种栽培的威胁。本研究在位于29°10’N和75°46’E的印度CCS Haryana农业大学进行,其目的是鉴... 详细信息

由核盘菌Sclerotinia sclerotiorum（Lib）De Bary引起的芸薹属物种的菌核病是一种破坏性疾病,在全球范围内各油菜生产国都形成了对芸薹属物种栽培的威胁。本研究在位于29°10’N和75°46’E的印度CCS Haryana农业大学进行,其目的是鉴定耐菌核病的资源/品系。选择来自澳大利亚、中国和印度的91个种质资源（43个芥菜型油菜、48个甘蓝型油菜）,在温室条件下,通过苗期土壤接种和80%植株开花期（90天植株,处于角果发育期）茎秆接种鉴定苗期和角果发育期抗/耐菌核病资源。因为在这两个时期,病原菌通过子囊孢子和子实体萌发菌核,都具有系统的空气传染能力。接种后5-6天出现病症,15天内幼苗倒伏。没有任何一个芸薹属油料作物种质品系/资源对菌核病表现出完全抗性。在幼苗期,来自澳大利亚的芥菜型油菜JO009、JN031和JN033观察到具有耐病性,而来自印度和中国的品系没有。甘蓝型油菜中,来自澳大利亚的AG Outback、Rainbow、RQ011、RQ011-02m2和来自印度的Neelam和GSL1以及来自中国的YU178在幼苗期观察到耐病性。本研究中病害程度的变异可能是选择的病原体类型和植株年龄造成的。在幼苗期观察到耐病性的基因型在角果形成期不一定具有耐病性,反之亦然。但是,基因型RQ011在幼苗期和角果形成期都观察到具有耐病性。耐病性水平在基因型间也有变化。基于耐病性的有效水平,建议利用已鉴定的基因型进一步提高对菌核病的抗/耐性水平,而非作为聚合菌核病抗性的供体亲本。

关键词： Sclerotinia Indian mustard （Brassica juncea Czern ＆ Coss.） Swede Rape （Brassica napus） Screening Oilseed Brassica.

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