Thermodynamic and kinetic aspects of Sn nucleation and growth processes onto a glassy carbon electrode from SnCl2·2H2O dissolved in ethylene glycol solutions were studied.Typical reduction and oxidation peaks obs...Thermodynamic and kinetic aspects of Sn nucleation and growth processes onto a glassy carbon electrode from SnCl2·2H2O dissolved in ethylene glycol solutions were studied.Typical reduction and oxidation peaks observed in voltammograms have demonstrated the capability of ethylene glycol solutions to electrodeposit Sn.The temperature-dependence of diffusion coefficient values derived from potentiodynamic and potentiostatic studies helped to determine and validate estimations of the activation energy for Sn(II)bulk diffusion.Chronoamperometric results have identified that,the suitable model to describe the early stage of Sn electrodeposition could be composed of Sn three-dimensional nucleation and diffusion-controlled growth and water reduction contributions,which was duly validated by theoretical and experimental approaches.From the model,typical kinetic parameters such as the nucleation frequency of Sn(A),number density of Sn nuclei(N_(0)),and diffusion coefficient of Sn(II)ions(D),were determined.The presence of Sn nuclei with excellent quality and their structures were verified using SEM,EDX,and XRD techniques.展开更多
We study flavor-changing bottom quark radiative decay b→sγinduced at the one-loop level within the minimal gauged two-Higgs-doublet model(G2HDM).Among the three new contributions to this rare process in G2HDM,we fin...We study flavor-changing bottom quark radiative decay b→sγinduced at the one-loop level within the minimal gauged two-Higgs-doublet model(G2HDM).Among the three new contributions to this rare process in G2HDM,we find that only the charged Higgs H^(±) contribution can be constrained by the current global fit data in Bphysics.The other two contributions from complex vectorial dark matter W and dark Higgs D are not sensitive to the current data.Incorporating theoretical constraints imposed on the scalar potential and electroweak precision data for the oblique parameters,we exclude mass regions m_(H)^(±)≤250 GeV and m_(D)≤100 GeV at the 95% confidence level.展开更多
I.EXECUTIVE SUMMARY next-generation,high-intensity electron-positron collider"Higgs factory",such as the Circular Electron-Positron Collider(CEPC),is among the highest priorities for the global high-energy c...I.EXECUTIVE SUMMARY next-generation,high-intensity electron-positron collider"Higgs factory",such as the Circular Electron-Positron Collider(CEPC),is among the highest priorities for the global high-energy collider physics community.The CEPC can provide unprecedented opportunities for making fundamental discoveries and providing decisive insights in the quest for a"New Standard Model(SM)"of nature's fundamental interactions.The CEPC could:·Identify the origin of matter,especially the mechanism related to the first-order phase transition in the early Universe,which could produce a detectable gravitational wave signal.展开更多
文摘Thermodynamic and kinetic aspects of Sn nucleation and growth processes onto a glassy carbon electrode from SnCl2·2H2O dissolved in ethylene glycol solutions were studied.Typical reduction and oxidation peaks observed in voltammograms have demonstrated the capability of ethylene glycol solutions to electrodeposit Sn.The temperature-dependence of diffusion coefficient values derived from potentiodynamic and potentiostatic studies helped to determine and validate estimations of the activation energy for Sn(II)bulk diffusion.Chronoamperometric results have identified that,the suitable model to describe the early stage of Sn electrodeposition could be composed of Sn three-dimensional nucleation and diffusion-controlled growth and water reduction contributions,which was duly validated by theoretical and experimental approaches.From the model,typical kinetic parameters such as the nucleation frequency of Sn(A),number density of Sn nuclei(N_(0)),and diffusion coefficient of Sn(II)ions(D),were determined.The presence of Sn nuclei with excellent quality and their structures were verified using SEM,EDX,and XRD techniques.
基金Supported in part by the National Natural Science Foundation of China (19Z103010239, 12350410369 (VQT), U1932104 (FRX))the NSTC (111-2112-M-001-035 (TCY))。
文摘We study flavor-changing bottom quark radiative decay b→sγinduced at the one-loop level within the minimal gauged two-Higgs-doublet model(G2HDM).Among the three new contributions to this rare process in G2HDM,we find that only the charged Higgs H^(±) contribution can be constrained by the current global fit data in Bphysics.The other two contributions from complex vectorial dark matter W and dark Higgs D are not sensitive to the current data.Incorporating theoretical constraints imposed on the scalar potential and electroweak precision data for the oblique parameters,we exclude mass regions m_(H)^(±)≤250 GeV and m_(D)≤100 GeV at the 95% confidence level.
基金the Natural Science Foundation of China(NSFC)(11905162,12035008,12075097,12075123,12090060,12090064,12105248,12135006,12175039,12205227,12205312,12205387,12205171,12235008,12321005,12235001,12305094,12305115,12335005,12375091,12375094,12375096,11975129,12375194,12447167,12475094,12475101,12475106,12475111,12425506,12375101,12405119,12405101,12505121,12135007,12175218,12075213,12335005,12175243,12533001,12125503,12305103,12505120,12575099,12505122,12342502,12575106,12147214,W2432006,W2441004)the National Key R&D Program of China(2024YFA1610603)+22 种基金the China Postdoctoral Science Foundation(2023M732255,2025M773403,GZC20231613)the Natural Science Foundation of Jiangsu Province(BK20210201)the Natural Science Foundation of Henan(Distinguished Young Scholars of Henan Province)(242300421046)the Natural Science Foundation of Sichuan Province(2025ZNSFSC0880)the Guangdong Major Project of Basic and Applied Basic Research(2020B0301030008)the Department of Science and Technology of Shandong province(tsqn202312052,2024HWYQ-005)the Startup Research Fund of Henan Academy of Sciences(20251820001)the Excellent Young Talents Program of Wuhan University of Technology(40122102)the research program of the Wuhan University of Technology(3120625397,2020IB024)the Fundamental Research Funds for the Central Universities(JZ2023HGTB0222,WUT:2022IVA052)the Excellent Scholar Project of Southeast University(Class A)the Big Data Computing Center of Southeast University,National Science and Technology Council,the Ministry of Education(Higher Education Sprout Project NTU-114L104022-1)the Center for Theoretical Sciences of Taiwan,and Vietnam National Foundation for Science and Technology Development(NAFOSTED)(103.01-2023.50)the Research Office of the University of the Witwatersrand and South African Department of Science and Innovation through the SA-CERN programthe self-determined research funds of Central China Normal University from the colleges'basic research and operation of MOE(CCNU24AI003)SJTU Double First Class start-up fund(WF220442604)the Innovation Capability Support Program of Shaanxi(2021KJXX-47)the Slovenian Research Agency under the research core funding No.P1-0035,the research grants J1-3013,N1-0253,CONICET,ANPCyT under project(PICT-2021-00374)Higher Education Sprout Project(NTU-114L104022-1)KIAS Individual Grants(PG086002)at the Korea Institute for Advanced Study,FAPESP(2021/09547-9)the Slovenian Research Agency under the research core funding(P1-0035)research grants J1-3013,N1-0253the bilateral project Proteus PR-12696/Projet 50194VC。
文摘I.EXECUTIVE SUMMARY next-generation,high-intensity electron-positron collider"Higgs factory",such as the Circular Electron-Positron Collider(CEPC),is among the highest priorities for the global high-energy collider physics community.The CEPC can provide unprecedented opportunities for making fundamental discoveries and providing decisive insights in the quest for a"New Standard Model(SM)"of nature's fundamental interactions.The CEPC could:·Identify the origin of matter,especially the mechanism related to the first-order phase transition in the early Universe,which could produce a detectable gravitational wave signal.
