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阳江高本底地区辐射致癌危险分析（1979--2002年）

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中华放射医学与防护杂志 2016年第1期36卷 44-50页

作者：王海军孙全富秋葉澄伯张守志钱叶侃雷淑杰深圳市职业病防治院 518001 中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室北京100088 890-8520日本鹿儿岛大学医学和牙科学研究所北京市海淀区疾病预防控制中心 100094

目的分析1999--2002年随访资料，并与既往1979--1998年资料合并分析，以期进一步提高辐射致癌危险估计的统计效能；调整个体吸烟因素，重新估计高本底地区小剂量电离辐射的致癌危险。方法高本底地区和对照地区居民癌症研究采用队列研究... 详细信息

目的分析1999--2002年随访资料，并与既往1979--1998年资料合并分析，以期进一步提高辐射致癌危险估计的统计效能；调整个体吸烟因素，重新估计高本底地区小剂量电离辐射的致癌危险。方法高本底地区和对照地区居民癌症研究采用队列研究方法，分阶段对研究对象进行随访。本研究阶段首先搜集1999--2002年的癌症死亡资料，并初步分析1999--2002年高本底地区居民癌症死亡危险；其次通过ID号连接记录．将1999--2002年研究数据与1979--1998年研究数据进行合并，分析1979--2002年高本底地区居民的癌症死亡危险及调整吸烟后高本底地区居民的辐射致癌死亡危险。用Epicure软件中的DATAB模块计算人年数，用AMFIT模块的Poisson回归模型估算高本底地区居民癌症死亡的相对危险（RR）、超额相对危险系数（ERR／Sv）和可信区间（cI）。结果高本底地区和对照地区队列研究1999--2002年共随访76264人，累积观察300523人年，期间共死亡2267例．其中癌症死亡239例。1979--2002年合并资料共随访125079人，累积观察2293463人年．死亡14711例，其中癌症死亡1441例。1979--2002年癌症死亡分析结果显示，经性别、年龄调整后，高本底地区全癌症死亡的相对危险RR=0．99（95％cI：0．89～1．11），高本底地区和对照地区相比癌症死亡，结果差异无统计学意义（P〉0．05）；1979--2002年高本底地区全部癌症死亡的超额相对危险系数（ERR／Sv）为-0．01（95％cI：-0．50—0．64）。调整吸烟后，1987--2002年高本底地区全癌症死亡相对危险RR=1．00（95％cI：0．87～1．15），差异无统计学意义（P〉0．05）；高本底地区全部癌症死亡的ERR／Sv为0．01（95％cI：-0．56～0．81）。结论未发现高本底地区小剂量电离辐射引起居民癌症死亡危险的增加。调整吸烟后，高本底地区全部癌症死亡与对照地区相比．差异仍无统计学意义．但超额相对危险（ERR）较调整前稍增大。

关键词：高本底地区小剂量辐射癌症死亡相对危险

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.c.rvalho 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

Operative indications of follicular type tumors,based on Japanese clinical guidelines

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World Journal of Surgical Procedures 2013年第3期3卷 41-46页

作者： Hiroshi Takeyama Isao Tabei kumiko kato Makio kamio Hiroko Nogi Yasuo Toriumi Satoki kinoshita Tadashi akiba ken Uchida Toshiaki Morika Department of Surgery Jikei University School of MedicineTokyo 105-8461Japan

AIM: To investigate the accuracy of preoperative examinations in follicular type tumors, we re-evaluate results of our operative ***: cases are follicular neoplasms in 36 patients, which are more than 30 mm in diameter and underwent surgery in our hospital in 2005-2006. These cases had been suspected of malignancy on one or more of the preoperative examinations, including ultrasound(US), thallium-technecium(Tl-Tc) scinitigram,computed tomography(cT), or fine needle aspiration biopsy(FNA) examinations. concern about operative procedure, lobectomy plus sentinel lymph node biopsy(SNB) was performed in all 36 follicular tumors at the first surgery. Because we can diagnose a suspected follicular tumor as carcinoma and can change the operative procedure intra-operatively, when the metastasis of lymph nodes, outside of the thyroid, is found. The operative procedure was changed from lobectomy to total thyroidectomy plus lymph nodes dissection(centralcomponent), when the SNB has metastasis. All thirty six cases were obtained to track the prognosis until 2012, for 6-7 years follow up ***: The final pathological results are 3 cases of follicular carcinoma, 6 cases of papillary carcinoma, 1 case of papillary carcinoma follicular type, 1 case of malignant lymphoma, 16 cases of follicular adenoma, and 9 cases of adenomatous goiter. The malignant tumor were observed in 11/36(30.6%) cases. All six papillary carcinomas were less than 20 mm, and present with follicular adenoma and adenomatous goiter, which have more than 40 mm diameter. In physical examination, tumor size of 36 cases of follicular neoplasm is more than 30 mm all at the time of surgery. The tumors were palpable somewhat stiff, such as no cystic component in 34 cases. Occasional dyspnea, dysphagia, and cough was accompanied in all 36 cases. The true ratio of correct diagnosis of preoperative US, Tl-Tc scinitigram, cT, and FNA were 17/36(47.2%), 16/36(44.4%), 24/36(66.7%), 21/36(58.3%), respectivel

关键词： Follicular type tumor Preoperative diagnosis Operative indication Guideline of thyroid tumor Prognosis

阳江高本底女性居民低剂量辐射照射与颈动脉中内膜厚度关系的初步研究

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中华放射医学与防护杂志 2016年第9期36卷 682-687页

作者：苏垠平谭光享雷淑洁邹剑明张素芬刘建香李小亮孙全富秋菜澄伯中国疾病预防控制中心辐射防护与核安全医学所辐射防护与核应急中国疾病预防控制中心重点实验室北京100088 广东省职业病防治院广州510300 日本鹿儿岛大学医学与口腔学研究所鹿儿岛890-8520

目的探索长期低剂量电离辐射对人群心脑血管疾病的影响。方法选择阳江高本底地区γ外照射剂量率最高的4个管区，对照地区选择了距中心镇距离与高本底地区所选管区距中心镇距离相近的2个管区，高本底地区和对照地区分别选取50岁以上女性... 详细信息

目的探索长期低剂量电离辐射对人群心脑血管疾病的影响。方法选择阳江高本底地区γ外照射剂量率最高的4个管区，对照地区选择了距中心镇距离与高本底地区所选管区距中心镇距离相近的2个管区，高本底地区和对照地区分别选取50岁以上女性居民各100名，通过超声检查测量颈动脉中内膜厚度：采集外周静脉血样本，测定血液生化指标，包括总胆固醇、甘油三酯、高密度脂蛋白、低密度脂蛋白；测量血压、身高及体重，通过问卷调查收集个人生活史和居住史。同时，依据既往研究所测量的室内外环境地表γ剂量率及调查的年龄别居留因子，估算个人终生累积剂量。结果阳江高本底与对照地区居民的平均累积剂量分别为（161．2±38．6）和（43．7±7．3）mSv，平均年龄分别为（65．2±10．4）和（60．7±8．0）岁。高本底地区居民颈动脉中内膜厚度左、右两侧分别为（1．0±0．3）和（1．0±0．2）mm，对照地区左右两侧颈动脉中内膜厚度均为（0．9±0．2）mm。多元回归分析显示，调整年龄、血压、体质量指数（BMI）、血脂因素后，个人终生累积剂量为左颈动脉中内膜增厚的一个危险因素（β左=0．0007，P〈0．05）。不同剂量组（〈50，50～，100～，200～mSv）经调整后左动脉中内膜厚度平均值分别为0．9、1．0、0．9、1．1mm。结论长期低剂量辐射可能有加速血管老化、增加动脉粥样硬化的风险。

关键词：颈动脉中内膜厚度长期低剂量辐射高本底地区动脉粥样硬化

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.c.rvalho 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

阳江高本底地区恶性肿瘤死亡调查1987～1995年资料分析

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中华放射医学与防护杂志 1999年第2期19卷 75-82页

作者：陶祖范秋叶澄伯查永如加藤宽夫孙全富邹剑明李嘉刘玉升菅原努魏履新卫生部工业卫生实验所广东省职业病防治院日本鹿儿岛大学日本放射线影响研究所日本体质研究会

目的本项研究是高本底辐射研究组的一项专题，始于１９７２年，旨在探索平均年有效剂量为６４ｍＳｖ的阳江天然放射性高本底辐射照射的致癌危险。１９９１年起中日两国科学家合作继续研究，以累积更多观察人年数，提高统计学精度，并... 详细信息

目的本项研究是高本底辐射研究组的一项专题，始于１９７２年，旨在探索平均年有效剂量为６４ｍＳｖ的阳江天然放射性高本底辐射照射的致癌危险。１９９１年起中日两国科学家合作继续研究，以累积更多观察人年数，提高统计学精度，并检验以往研究的可重复性。方法合作研究后所获１９８７～１９９５年恶性肿瘤死亡资料是通过回顾性调查或／和前瞻性调查从定群队列中获得。恶性肿瘤死亡现场调查分为队列成员追踪和死因确认两步骤。按外照射年剂量水平，将高本底人群分为高、中、低剂量３个组，以进行内比较。高本底地区３个剂量组与对照组之间的比较采用相对危险（ＲＲ）。ＲＲ和超额相对危险（ＥＲＲ）系数及其９５％置信区间（ＣＩ）计算应用Ｅｐｉｃｕｒｅ中ＡＭＦＩＴ程序。结果１９８７年１月１日定群观察起点人口为１０６５１７人，至１９９５年共累积观察９２６２３８人年，期间共死亡５１６１人，其中恶性肿瘤死亡５５７例。整个高本底地区经性别年龄组调整的全部恶性肿瘤的ＲＲ（９５％ＣＩ）为０９６（０８０，１１５）。就部位别恶性肿瘤而论，白血病、鼻咽癌、食管癌和小肠癌的ＲＲ大于１，而胃癌、肝癌、肺癌、女性乳腺癌、甲状腺癌和淋巴肉瘤的ＲＲ小于１，但差异均无显著性。对全?

关键词：高本底地区癌症死亡调查相对危险肿瘤 ERR

Search for the doubly charmed baryon ?cc+

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Science china(Physics,Mechanics & Astronomy) 2021年第10期Mechanics & Astronomy) .卷 6-17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 R. Bernet D. Berninghoff H. c. Bernstein c. Bertella A. Bertolin c. Betancourt F. Betti I. 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 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 P. 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. clif J. closier J. L. cobbledick V. coco J. A. B. coelho J. cogan E. cogneras L. University of Groningen Universiteit Maastricht AGH-University of Science and Technology Faculty of Physics and Applied computer Science Università di cagliari Eotvos Lorand University 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) Université clermont Auvergne INFN Sezione di Perugia STFc Rutherford Appleton Laboratory School of Physics and Astronomy Monash University Novosibirsk State University Department of Physics and Astronomy Uppsala University University of Michigan Università di Genova School of Physics State key Laboratory of Nuclear Physics and Technology University of Michigan 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 Tria?ngulo Mineiro (UFTM) Institute of Particle Physics central china Normal University Hangzhou Institute for Advanced Study UcAS Instituto de Fisica corpuscular Ann Arbor 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 qUniversità di Siena Università di Padova Scuola Normale Superiore National Research centre kurchatov Institute United States 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 Departamento de Fisica Universidad Nacional de colombia Universit?t Bonn-Helmholtz-Institut für Strahlen und kernphysik nstitute of Physics INFN Sezione di Milano Ecole Polytechnique Fédérale de Lausanne (EPFL) Hanoi University of Science GH-University of Science and Technology Faculty of Physics and Applied computer Science epartment of Physics and Astronomy University of Manchester P.N. Lebedev Phys

A search for the doubly charmed baryon ?cc+with the decay mode ?cc+→Ξc+k-π+is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHcb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb-1. No significant signal is observed within the invariant mass range of 3.6 to 4.0 GeV/c2. Upper limits are set on the ratio R of the production cross-section times the total branching fraction of the ?cc+→Ξc+k-π+decay with respect to the Ξcc++→Λc+k-π+π+decay. Upper limits at 95% credibility level for R in the range 0.005 to 0.11 are obtained for diferent hypotheses on the ?cc+mass and lifetime in the rapidity range from 2.0 to 4.5 and transverse momentum range from 4 to 15 GeV/c.

关键词：

Measurement of Ξcc++ production in pp collisions at s1/2=13 TeV

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chinese Physics c 2020年第2期44卷 13-23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 P.Albicocco J.Albrecht F.Alessio M.Alexander A.Alfonso Albero G.Alkhazov P.Alvarez cartelle A.A.Alves Jr S.Amato Y.Amhis L.An L.Anderlini G.Andreassi M.Andreotti F.Archilli A.Artamonov M.Artuso k.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann J.J.Back S.Baker V.Balagura W.Baldini A.Baranov R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi V.Batozskaya B.Batsukh A.Battig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beiter L.J.Bel V.Belavin S.Belin V.Bellee k.Belous I.Belyaev G.Bencivenni E.Ben-Haim S.Benson S.Beranek 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 M.S.Bieker S.Bifani P.Billoir A.Bizzeti M.Bjørn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska V.Bocci O.Boente Garcia T.Boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk T.J.V.Bowcock c.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu E.Buchanan A.Buonaura c.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.cadeddu H.cai R.calabrese 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 L.capriotti A.carbone G.carboni R.cardinale A.cardini I.carli P.carniti k.c.rvalho akiba A.casais Vidal G.casse M.cattaneo G.cavallero S.celani R.cenci J.cerasoli M.G.chapman M.charles Ph.charpentier G.chatzikonstantinidis M.chefdeville V.chekalina c.chen S.chen A.chernov S.-G.chitic V.chobanova S.cholak M.chrzaszcz A.chubykin P.ciambrone M.F.cicala X.cid Vidal G.ciezarek F.cindolo 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 A.comerma-Montells A.contu N.cooke G.coombs S.coquereau G.corti c.M.costa Sobral B.couturier D.c.craik J.crkovska A.crocombe M.cruz Torres R.currie c.L.Da Silva E.Dall'Occo J.Dalseno c.D' 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 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) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universitéclermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance 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-Bicocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di cagliari MonserratoItaly INFN Sezione di Padova PadovaItaly 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 KrakówPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The production of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4c and the rapidity range2.0 详细信息

The production of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in the transverse-momentum range 4c and the rapidity range2.0correspond to an integrated luminosity of 1.7fb^-1,recorded by the LHcb experiment during *** ratio of the ■ production cross-section times the branching fraction of the■→∧^+ck^-π^+ π^+decay relative to the prompt ∧^+c production cross-section is found to be(2.22±0.27±0.29)×10^-4,assuming the central value of the measured lifetime,where the first uncertainty is statistical and the second systematic.

关键词： doubly charmed baryons hadron production QcD

■^(−)_(b)→J/ψΛk^(−)衰变中一个J/ψΛ结构的迹象与■^(−)激发态的发现

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Science Bulletin 2021年第13期66卷 1278-1287,M0003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 S.Baker 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 E.Bertholet 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.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.c.rvalho 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.crkovská M.cruz Torres R.currie c.L.Da Silva E.Dall’ 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 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) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universitéclermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-ringuet(llr) PalaiseauFrance 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-Bicocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di cagliari MonserratoItaly 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 KrakówPoland AGH-University of Science and Techno

夸克和胶子组成的粒子统称强子,其中包含4个或以上组分夸克的强子被称为奇异强子.目前实验上发现的奇异强子最多包含5个夸克,称为五夸克态.对五夸克态的深入研究可以检验对强相互作用的理解.利用质心能量为7、8和13 TeV,总积分亮度9 fb^... 详细信息

夸克和胶子组成的粒子统称强子,其中包含4个或以上组分夸克的强子被称为奇异强子.目前实验上发现的奇异强子最多包含5个夸克,称为五夸克态.对五夸克态的深入研究可以检验对强相互作用的理解.利用质心能量为7、8和13 TeV,总积分亮度9 fb^(−1)的质子-质子对撞数据,大型强子对撞机底夸克实验(LHcb)采用全谱分析的方法,研究了■^(−)_(b)→J/ψΛk^(−)衰变过程中的共振态结构.实验发现J/ψΛ系统中存在质量约为4.46 MeV/c^(2)的共振结构存在的迹象,其显著程度为3.1倍标准偏差,性质与五夸克态相符.这是实验上首次观测到包含奇异夸克的五夸克态的存在证据,为五夸克态的理论研究和后续的实验探索提供了重要的依据.除此之外,实验还精细测量了Λk−系统中部分共振态的共振参数,精度远高于当前世界平均值,这对加深传统重子谱学的认识有着重要的意义.

关键词：大型强子对撞机强相互作用五夸克态共振结构奇异夸克强子组分夸克重子谱