检索结果-南通市图书馆

eμ Production in R-Parity Violating Supersymmetric Model at Hadron Colliders

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2007年第3X期48卷 491-501页

作者： WANG Shao-Ming han liang ma wen-gan zhang ren-you jiang yi Department of Modern Physics University of Science and Technology of China Hefei 230026 China

We investigate the lepton flavor violating productions pp/pp→eμ ＋ X in the framework of the R-parity violating （RPV） supersymmetric model at the Tevatron and the CERN large hadron collider （LHC）. We present the total cross sections including the next-to-leading order （NLO） QCD corrections and the contribution from gluon-gluon fusion subprocess. Our numerical results show that the one-loop QCD corrections significantly increase the tree-level cross sections, and the variation of K factor is in the range between 1.28 （1.32） and 1.79 （1.58） at the Tevatron （LHC）. We find that the QCD correction from the one-loop gluon-gluon fusion subprocess is remarkable at the LHC and should be taken into account.

关键词： R-parity violating supersymmetric model QCD corrections

e^(+)e^(−)γ production at photon-photon colliders at complete electroweak NLO accuracy

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2022年第4期46卷 40-56页

作者： He-yi Li ren-you zhang wen-gan ma yi jiang Xiao-zhou Li State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China

We present the NLO electroweak radiative corrections to the e^(+)e^(−)γ production in γγ collision,which is an ideal channel for calibrating the beam luminosity of a Photon Linear *** analyze the dependence of the total cross section on the beam colliding energy,and then investigate the kinematic distributions of final particles at various initial photon beam polarizations at EW NLO *** numerical results indicate that the EW relative corrections to the total cross section are non-negligible and become increasingly significant as the increase of the beam colliding energy,even can exceed -10% in the J=2 γγ collision at √s=1 *** EW corrections are very important and should be taken into consideration in precision theoretical and experimental studies at high-energy γγ colliders.

关键词： luminosity measurement at PLC NLO electroweak correction longitudinally-polarized beams

Precision study of W^-W^+H production including parton shower effects at CERN Large Hadron Collider

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2019年第12期43卷 24-37页

作者： Huan-Yu Bi ren-you zhang wen-gan ma yi jiang Xiao-zhou Li Peng-Fei Duan State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modem Physics University of Science and Technology of ChinaHefei 230026China City College Kunming University of Science and TechnologyKunming 650051China

The precision study of W^-W^+H production with subsequent W^±→l^±vl^(-)and H→bb decays at the Large Hadron Collider(LHC)aids in the investigation of Higgs gauge couplings and the search for new physics beyond the standard *** this study,we calculate the shower-matched next-to-leading order QCD and electroweak(EW)corrections from the qq annihilation and photon-induced channels to the W^-W^+H production at the 14 TeV *** deal with the subsequent decays of Higgs and W^±bosons by adopting the maDSPIN *** the integrated cross section and some kinematic distributions of W^±,H,and their decay products are *** find that the QCD correction significantly enhances the leading-order differential cross section,while the EW correction from the qq annihilation channel obviously suppresses it,especially in the high energy phase-space region,due to the Sudakov *** qy-and yy-induced relative corrections are positive and insensitive to the transverse momenta of W^±,H,and their decay *** photon-induced corrections compensate the negative qq-initiated EW correction,and become the dominant EW contribution as the increment of the pp colliding *** parton shower(PS)effects on kinematic distributions are not *** relative PS correction to the b-jet transverse momentum distribution can exceed 100%in the high p_(T,b)***,we investigate the scale and PDF uncertainties,and find that the theoretical error of the QCD+EW+qγ+γγ-corrected integrated cross section mainly originates from the renormalization scale dependence of the QCD correction.

关键词： Higgs gauge coupling QCD+EW correction parton shower

Etiology spectrum and clinical characteristics of renal artery stenosis in a Chinese cohort

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2021年第2期18卷 104-113,I0001页

作者： Xu MENG yi zhou Xiong-jing jiang Jun CAI Hui-Min zhang Hai-ying WU wen-Jun ma ying LOU ya-Xin LIU Xian-liang zhou Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina Emergency and Critical Care Center Fuwai HospitalNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

OBJECTIVE To analyze the causes of renal artery stenosis(RAS)and compare the clinical characteristics in accordance with the primary disease among patients aged from 30 to *** Patients were grouped by etiologies of *** were retrospectively examined and compared regarding demographic data,clinical manifestations,laboratory findings,and imaging *** A total of 152 patients(74 females,78 males;mean age:40.70±6.01 years)were enrolled,including 84 patients(55.3%)with atherosclerosis(AS),46 patients(30.3%)with Takayasu arteritis(TA),18 patients(11.8%)with fibromuscular dysplasia(FMD),and four patients(2.6%)with other *** in AS group had greater body mass index,higher prevalence of comorbidities and higher rate of smoking and drinking *** patients showed more constitutional symptoms and vascular findings,and higher erythrocyte sedimentation *** in both AS group and TA group mainly located on ostia and proximal segments,but RAS in FMD group mainly involved middle to distal segment of renal *** AS group had significantly lesser stenosis than the other *** renal function evaluated by the estimated glomerular filtration rate did not significantly differ among the groups,the incidence of kidney shrinkage was significantly higher in the TA and FMD groups(39.1%and 50%,respectively)than in the AS group(8.3%).The FMD group had milder cardiac damage than other *** AS was the most common cause of RAS in patients aged from 30 to 50,followed by TA and *** etiology of RAS should be carefully distinguished based on clinical manifestations,laboratory findings,and imaging to ensure that proper treatment is provided.

关键词： clinical stenosis finding

Effects of B segregation on Mo-rich phase precipitation in S31254 super-austenitic stainless steels:Experimental and first-principles study

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第11期31卷 445-454页

作者： Pan-Pan Xu jin-yao ma zhou-Hua jiang yi zhang Chao-Xiong liang Nan Dong Pei-De han 无 College of materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Instrumental Analysis Center Taiyuan University of TechnologyTaiyuan 030024China Taiyuan Iron and Steel(Group)Company Ltd Taiyuan 030024China School of Metallurgy Northeastern UniversityShenyang 110167China

Precipitation in super-austenitic stainless steels will significantly affect their corrosion resistance and hot *** effects of Cr and Mo on precipitation behaviors were mainly achieved by affecting the driving force for precipitation,especially Mo has a more substantial promotion effect on the formation of theσphase than *** the present study,B addition to the S31254 super-austenitic stainless steels shows an excellent ability to inhibit *** effect of B on the precipitation behaviors was investigated by microstructure characterization and theoretical *** experimental observation shows that the small addition of B inhibits the formation of theσphase along grain boundaries and changes from continuous to intermittent ***,the inhibitory effect increased obviously with the increase of B *** influence of B addition was theoretically analyzed from the atomic level,and the calculation results demonstrate that B can inhibit the formation ofσphase precipitates by suppressing Mo migration to grain *** is found that B and Mo are inclined to segregate atΣ5 andΣ9 grain boundaries,with B showing the most severe grain boundary segregation *** B distribution at the grain boundary before precipitation begins,the segregation of Mo and Cr will be ***,B’s occupation will induce a high potential barrier,making it difficult for Mo to diffuse towards grain boundaries.

关键词： super-austenitic stainless steel precipitate segregation boron

Lithium-plasmon-based low-powered dynamic color display

在线全文

学校读者我要写书评

暂无评论

National Science Review 2023年第1期10卷 205-213页

作者： Jie liang yan jin Huiling Yu Xinjie Chen Lin zhou Pengcheng Huo Ye zhang Haiyang ma yi jiang Bin Zhu Ting Xu Hui Liu Shining Zhu Jia Zhu National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesSchool of Physics Key Laboratory of Intelligent Optical Sensing and ManipulationMinistry of EducationJiangsu Key Laboratory of Artificial Functional MaterialsNanjing University

Display and power supply have been two essential and independent cornerstones of modern ***,we report a lithium-plasmon-based low-powered dynamic color display with intrinsic dual functionality（plasmonic display and energy recycling unit） which is a result of the electric-field-driven transformation of nanostructured lithium *** color displays are enabled by plasmonic transformation through electrodeposition（electrostripping） of lithium metals during the charging（discharging） process,while the consumed energy for coloring can be retrieved in the inverse process *** recycling of lithium metals brings energy consumption down to 0.390 mW cm-2(0.105 mW cm-2) for the active（static） coloration state of a pro of-of-concept display/battery device,which approaches nearly-zero-energy-consumption in the near-100%-energy-efficiency limit of commercial lithium *** the subwavelength feature of plasmonics with effective energy recycling,the lithium-plasmon-based dynamic display offers a promising route towards next-generation integrated photonic devices,with the intriguing advantages of low energy consumption,a small footprint and high resolution.

关键词： lithium plasmon dynamic display lithium metal battery low energy consumption lithium nanoparticle

Formation of novel TRIP-ductilized bulk metallic glass composites by manipulating nucleation kinetics via minor alloying

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2023年第7期42卷 2182-2188页

作者： Xi-Lai jiang wen-Li Song Ming yang Yuan-Bo zhou yan Huang Zhi-Chao Lu yi-Bo zhang Jie Dong liang Wang Bo Peng Chun-Ming Hu jin-Kui Zhao Sheng-Zhong Kou Dong ma School of materials Science and Engineering Lanzhou University of TechnologyLanzhou730050China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing100049China Spallation Neutron Source Science Center Dongguan523803China Neutron Science Platform Songshan Lake Materials LaboratoryDongguan523808China State Key Laboratory for Advanced Metals and materials University of Science and Technology BeijingBeijing100083China Institute of Physics Chinese Academy of Sciences(CAS)Beijing100190China

A series of conical bulk metallic glass composites(BMGCs)with compositions of Zr_(47)Cu_(47-x)Al_(5)Ag_(1)Ga_(x)(x=0,1,2,4;at%)were synthesized using the minor alloying method to investigate the effect of Ga addition ... 详细信息

关键词： alloying properties glass

Site-testing at Muztagh-ata site Ⅲ:temperature inversion in surface-layer atmosphere

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2020年第6期20卷 185-192页

作者： jing Xu Ali Esamdin Guo-Jie Feng Guang-Xin Pu yi Hu Ke-liang Hu Xu yang jin-Xin Hao yan-Jie Xue Xu zhou Shu-Guo ma Abudusaimaitijiang yisikandee Le-Tian Wang Xuan zhang Chun-Hai Bai Peng Wei liang Ming Lu ma jin-Zhong Liu Yun-ying jiang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China

In this article,we present detailed seasonal,monthly and daily statistics of temperature difference in the surface layer at the Muztagh-ata site based on the temperature measurements at two heights of 2 m and6 *** find that temperature inversion occurs frequently at our site during nighttime,especially during the cold *** temperature inversion always represents stable atmospheric turbulence,which is crucial for an optical *** analyzing the behavior of temperature inversion and its correlation with wind and cloud amount,one conclusion can be made that radiation inversion is the main reason for the existence of temperature inversion in the surface-layer at the Muztagh-ata site.

关键词： site testing atmospheric turbulence temperature inversion

Stepped-up development of accelerator mass spectrometry method for the detection of ^(60)Fe with the HI-13 tandem accelerator

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第4期35卷 136-143页

作者： yang zhang Sheng-Quan yan Ming He Qing-zhang Zhao wen-Hui zhang Chao-Xin Kan Jian-Ming zhou Kang-Ning Li Xiao-Fei Wang Jian-Cheng Liu Zhao-Hua Peng Zhuo liang Ai-Ling Li Jian Zheng Qi-wen Fan Yun-Ju Li you-Bao Wang Zhi-Hong Li yang-Ping Shen Ding Nan Wei Nan Yu-Qiang zhang Jia-ying-Hao Li Jun-wen Tian jiang-Lin Hou Chang-Xin Guo Zhi-Cheng zhang Ming-Hao Zhu Yu-wen Chen Yu-Chen jiang Tao Tian jin-Long ma yi-Hui Liu jing-Yu Dong Run-Long Liu Mei-Yue-Nan ma Yong-Shou Chen Wei-Ping Liu Bing Guo China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China College of Science Southern University of Science and TechnologyShenzhen 518055China School of Physics Xi’an Jiaotong UniversityXi’an 710049China

The Moon provides a unique environment for investigating nearby astrophysical events such as *** samples retain valuable information from these events,via detectable long-lived“fingerprint”radionuclides such as^(60)*** this work,we stepped up the development of an accelerator mass spectrometry(AMS)method for detecting^(60)Fe using the HI-13tandem accelerator at the China Institute of Atomic Energy(CIAE).Since interferences could not be sufficiently removed solely with the existing magnetic systems of the tandem accelerator and the following Q3D magnetic spectrograph,a Wien filter with a maximum voltage of±60 kV and a maximum magnetic field of 0.3 T was installed after the accelerator magnetic systems to lower the detection background for the low abundance nuclide^(60)Fe.A 1μm thick Si_(3)N_(4) foil was installed in front of the Q3D as an energy *** particle detection,a multi-anode gas ionization chamber was mounted at the center of the focal plane of the ***,an^(60)Fe sample with an abundance of 1.125×10^(-10)was used to test the new AMS *** results indicate that^(60)Fe can be clearly distinguished from the isobar^(60)*** sensitivity was assessed to be better than 4.3×10^(-14)based on blank sample measurements lasting 5.8 h,and the sensitivity could,in principle,be expected to be approximately 2.5×10^(-15)when the data were accumulated for 100 h,which is feasible for future lunar sample measurements because the main contaminants were sufficiently separated.

关键词： Accelerator mass spectrometry Wien filter Isobar separation Supernovae Chang'e-5 lunar samples