a
r
X
iv:cond
-
m
at/0207582v1 [cond-mat.str-el] 24 Jul 2002Current-currentcorrelationsinamodelCuO3system
BhargaviSrinivasanandMarie-BernadetteLepetit
LaboratoiredePhysiqueQuantique,UMR5626duCNRS,Universit´ePaulSabatier,F-31062ToulouseCedex4,France(February1,2008)
Westudya3-bandextendedHubbardmodelonaCuO3systembythedensitymatrixrenormal-izationgroup(DMRG)method.OursystemhasgeometrysimilartothatofasectionoftheCuO2planeofthecopper-oxidesuperconductors.Wehavestudiedtheeffectsofnearest-neighbourrepul-sionsonthecurrent-currentcorrelationsoftwomodelCuO3systems.Wehavecalculatedseveraltypesofstaggeredcurrentcorrelationsasafunctionofvariousmodelparameterssuchasinterac-tionstrengthsandfilling.Weshowthatrepulsiveinteractionsareclearlycapableofincreasingthemagnitudeofthecurrent-currentcorrelationsinbothmodelsstudied.Thelong-distancebehaviorofthecurrent-currentcorrelationsisqualitativelyinfluencedbyV.Weshowthatrepulsiveinterac-tionsarecapableofenhancingcorrelationsinvolvingatleastonecopper-oxygenrungoverdistancescomparabletothelengthofthesystem.Insomecases,Vdecreasestheexponentcorrespondingtothepower-lawdecay,leadingtoaconsiderableslowingdownofthelong-distancedecayofthecurrent-currentcorrelations,comparedtothatoftheHubbardmodel.
PHYSICALREVIEWB94,241110(R)(2016)
HubbardbandversusoxygenvacancystatesinthecorrelatedelectronmetalSrVO3
S.Backes,1T.C.R¨odel,2,3F.Fortuna,2E.Frantzeskakis,2P.LeF`evre,3F.Bertran,3M.Kobayashi,4R.Yukawa,4
T.Mitsuhashi,4M.Kitamura,4K.Horiba,4H.Kumigashira,4R.Saint-Martin,5A.Fouchet,6B.Berini,6Y.Dumont,6
A.J.Kim,1F.Lechermann,7,8H.O.Jeschke,1M.J.Rozenberg,9R.Valent´ı,1,*andA.F.Santander-Syro2,†
1Institutf¨urTheoretischePhysik,Goethe-Universit¨atFrankfurt,Max-von-Laue-Strasse1,60438FrankfurtamMain,Germany2CSNSM,Univ.Paris-Sud,CNRS/IN2P3,Universit´eParis-Saclay,91405OrsayCedex,France3SynchrotronSOLEIL,L’OrmedesMerisiers,Saint-Aubin-BP48,91192Gif-sur-Yvette,France4PhotonFactory,InstituteofMaterialsStructureScience,HighEnergyAcceleratorResearchOrganization(KEK),
1-1Oho,Tsukuba305-0801,Japan5SP2M-ICMMO-UMR-CNRS8182Universit´eParis-Sud,Universit´eParis-Saclay,91405OrsayCedex,France6GEMaC,Universit´edeVersaillesSt.QuentinenY.-CNRS,Universit´eParis-Saclay,Versailles,France7Institutf¨urTheoretischePhysik,Universit¨atHamburg,Jungiusstrasse9,20355Hamburg,Germany8Institutf¨urKeramischeHochleistungswerkstoffe,TUHamburg-Harburg,D-21073Hamburg,Germany9LaboratoiredePhysiquedesSolides,CNRS,Univ.Paris-Sud,Universit´eParis-Saclay,91405OrsayCedex,France
DESY02-096ISSN0418-9833
July2002
SearchforExcitedElectronsatHERA
H1Collaboration
Abstract
Asearchforexcitedelectron(e∗
)productionisdescribedinwhichtheelectroweakdecays
e∗
→eγ,e∗
→eZande∗
→νWareconsidered.Thedatausedcorrespondtoan
integratedluminosityof120pb−1
takenine±
pcollisionsfrom1994to2000withtheH1
detectoratHERAatcentre-of-massenergiesof300and318GeV.Noevidenceforasignal
isfound.Massdependentexclusionlimitsarederivedfortheratioofthecouplingstothe
compositenessscale,f/Λ.Theselimitsextendtheexcludedregiontohighermassesthan
hasbeenpossibleinpreviousdirectsearchesforexcitedelectrons.
Tobesubmittedto
PhysicsLettersBC.Adloff33
,V.Andreev24
,B.Andrieu27
,T.Anthonis4
,A.Astvatsatourov35
,A.Babaev23
,
J.B¨ahr35
,P.Baranov24
,E.Barrelet28
,W.Bartel10
,S.Baumgartner36
,J.Becker37
,
M.Beckingham21
,A.Beglarian34
,O.Behnke13
,A.Belousov24
,Ch.Berger1
a
rXiv:hep-ph/9711228v1 4 Nov 1997hep-ph/9711228
October1997
O(α)QEDCorrectionstoPolarized
ElasticµeandDeepInelasticlNScattering
DimaBardina,b,c,JohannesBl¨umleina,PenkaChristovaa,d,andLidaKalinovskayaa,c
aDESY–Zeuthen,Platanenallee6,D–15735Zeuthen,Germany
bINFN,SezionediTorino,Torino,Italy
cJINR,ul.Joliot-Curie6,RU–141980Dubna,Russia
dBishopKonstantinPreslavskyUniversityofShoumen,9700Shoumen,Bulgaria
Abstract
Twocomputercodesrelevantforthedescriptionofdeepinelasticscatteringoffpolarizedtargetsarediscussed.Thecodeµeladealswithradiativecorrectionstoelasticµescattering,onemethodappliedformuonbeampolarimetry.ThecodeHECTORallowstocalculateboththeradiativecorrectionsforunpolarizedandpolarizeddeepinelasticscattering,includinghigherorderQEDcorrections.
1Introduction
TheexactknowledgeofQED,QCD,andelectroweak(EW)radiativecorrections(RC)tothe
