简介:Thereisagrowingsupportforthelowlyingscalarmesonsf0(500),f0(980),a0(980),and(800)tobegenerateddynamicallyfromtheinteractionofpseudoscalarmesons,whilethecaseofthenextsetofscalarresonancesathigherenergies,f0(1370),f0(1710),K0(1430)ismoreaquestionofdebate.Soisthecaseofthetensorresonancesf2(1270),f′2(1525),K2(1430).AnewperspectiveonthesestateshasbeenofferedinRef.[1]wherethef0(1370)andf2(1270)resonancesareshowntobegeneratedfromtheinteractionprovidedbythelocalhiddengaugeLagrangiansimplementingunitarization.Itisshownthattheideaofthenatureofthesestatesasvectormeson-vectormesoncompositestateshasbeentestedinmanyreactions.Yet,thepermanentdiscussionoftheissuedemandsextrachecksforotherobservablesand,inthissense,theweakdecaysbringanewsourceofvaluableinformationthatshouldservetotestdifferentmodels.
简介:Ultrafast各向异性的腐烂是揭示ultrafast精力和电子转移的一个突出的参数;然而,由于平行和垂直极化的腐烂动力学的同时的可获得性的要求可靠地坚定是困难的。现在,各向异性的腐烂的任何测量是准确同时性的一种途径。这里,我们为同步ultrafastanisotropy腐烂大小报导一个新奇方法,它能很好决定anisotropy,甚至在一很早的时间,作为刺激激光脉搏的升起的阶段。在与协调刺激在房间温度在答案收获Rhodobactersphaeroides的天线建筑群LH2的细菌的光的B850的各向异性的腐烂被这个方法检测,它显示出30fs的一极化反应时间,并且到在B850戒指的bacteriochlorophylls的从起始的刺激的精力转移拿大约70fs。在吸收光谱的红方面被探查的各向异性的腐烂例如880nm,有0.4的起始的价值,相应于模仿的排放,当有0.1的anisotropy的蓝方面贡献漂白的地面状态时。我们的结果证明盖住整个戒指的协调刺激可能没由于LH2碎的对称被认识到:从在到在答案的C2对称的膜的C9对称。
简介:Theoreticalmodelsofstellarevolutionpredictnegligiblequantitiesof6Li,9Be,and11Binthehydrogenburningphasesofastar’sevolution[1].TheprimordialBig-Bangnucleosynthesis(BBN)modelmightbemoregenerousinitsproductionoftheseelements[2].Theradiative-capturecrosssectionforprotoncaptureon11Bleadingto12CissmallatastrophysicallyinterestingenergiesbecauseofthelargeCoulombbarrier.
简介:UsingtheefectiveHamiltonianmethod,weanalyzetheB0-ˉB0mixingintheextensionofthestandardmodel(SM)wherebaryonnumberandleptonnumberarelocalgaugesymmetries.ThenumericalresultsindicatethecorrectionfromtheextraparticlestothemassdiferencemBissignificant.Thereisa60%enhancementcomparedtotheSMpredictionformBatmost,whichagreeswiththecurrentexperimentalresult.
简介:Thefeaturesofthelow-lyingspectraoffour-bodyA+B-A+B-systemshavebeendeducedbasedonsymmetry.Usingthemethodoffew-bodyphysics,wecalculatetheenergyspectraofA+B-A+B-systemsinaharmonicquantumdot.Wefindthatthebiexcitoninatwo-dimensionalquantumdotmayhaveotherboundexcitedstatesandthequantummechanicalsymmetryplaysacrucialroleindeterminingtheenergylevelsandstructuresofthelow-lyingstates.
简介:ThesplittingofpotentialenergylevelsforgroundstateX2ΠgofOx2(x=+1,1)underspin–orbitcoupling(SOC)hasbeencalculatedbyusingthespin–orbit(SO)multi-configurationquasi-degenerateperturbationtheory(SO-MCQDPT).TheirMurrell–Sorbie(M–S)potentialfunctionsaregained,andthenthespectroscopicconstantsforelectronicstates2Π1/2and2Π3/2arederivedfromtheM–Sfunction.TheverticalexcitationenergiesforOx2(x=+1,1)areν[O+12(2Π3/2→X2Π1/2)]=195.652cm1,andν[O12(2Π1/2→X2Π3/2)]=182.568cm1,respectively.Allthespectroscopicdataforelectronicstates2Π1/2and2Π3/2aregivenforthefirsttime.
简介:WeinvestigateindetailtheeffectsofR-parityleptonnumberviolationonthedecay~↑b1→b~↑x1^0intheR-parityviolatingminimalsupersymmetricstandardmodel(Rp-MSSM)underthepresentexperimentalconstraintsonRpparameters.Inournumericalcalculationsweconsidertwocasesofinputparametersofthesquarkandsleptonsectors,MsquarkMslepton,forcomparison.TheresultsshowthattherelativeR-parityviolatingcorrectionisnotverysensitivetothemassofthelightestneutralino-0↑x1andthedegenerateR-parityviolatingcouplingparameterλ2′,butstronglydependsonMsquark,Mslepton,tanβandthedegenerateR-parityviolatingcouplingparameterλ1′.Therelativecorrectionisabout-4~3%andcanexceed-6%insomeregionofparameterspace.Therefore,preciseexperimentanalysesonthedecay~↑b1→b~↑x1^0mayprovideaprobeoftheR-parityviolation.
简介:一个新算法被介绍产生开发通过一条Bézier曲线的表面把一根准线称为的有能力的Bézier。算法基于微分几何学理论在上必要;为是的表面的足够的条件发展能,;在为参数曲线的度评估公式上;为伯恩斯坦基础的线性独立。没有非线性的典型方程不得不被解决。而且为一个锥的顶点;为正切表面的回归的边能容易被获得。Aumann的算法为开发有能力的表面是这篇论文的一种特殊情况。
简介:BasedonthelowenergyeffectiveHamiitonianwithnaivefactorization,wecalculatethebranchingratios(BRs)andCPasymmetries(CPAs)forthetwentythreedoublecharmdecaysB/Bs→Ds*Ds*inboththestandardmodel(SM)andtheminimalsupergravity(mSUGRA)model.Withintheconsideredparameterspace,wefindthat(a)thetheoreticalpredictionsfortheBRs,CPAsandthepolarizationfractionsintheSMandthemSUGRAmodelareallconsistentwiththecurrentlyavailabledatawithin±2σerrors;(b)Foralltheconsidereddecays,thesupersymmetriccontributionsinthemSUGRAmodelareverysmall,lessthan7%numerically.ItmaybedifficulttoobservesosmallSUSYcontributionsevenatLHC.