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29 papers · 1 filter
The 2-matrix of the spin-polarized electron gas: contraction sum rules and spectral resolutions
P. Ziesche, F. Tasnadi
The spin-polarized homogeneous electron gas with densities and for electrons with spin `up' () and spin `down' (), respectively, i…
W Boson Polarisation at LEP2
The OPAL collaboration, G. Abbiendi
Elements of the spin density matrix for W bosons in e+e- -> W+W- -> qqln events are measured from data recorded by the OPAL detector at LEP. This information is used calculate pola…
Measurement of the partial widths of the Z into up- and down-type quarks
The OPAL collaboration, G. Abbiendi
Using the entire OPAL LEP1 on-peak Z hadronic decay sample, Z -> qbarq gamma decays were selected by tagging hadronic final states with isolated photon candidates in the electromag…
On the number of equivalence classes of binary forms of given degree and given discriminant
Attila Berczes, Jan-Hendrik Evertse, Kalman Gyory
We give an explicit upper bound for the number of equivalence classes of binary forms with rational integral coefficients of given degree and given discriminant, and with given spl…
Plaquette operators used in the rigorous study of ground-states of the Periodic Anderson Model in dimensions
Zsolt Gulacsi
The derivation procedure of exact ground-states for the periodic Anderson model (PAM) in restricted regions of the parameter space and D=2 dimensions using plaquette operators is p…
Exact ground-state for the periodic Anderson model in D=2 dimensions at finite value of the interaction and absence of the direct hopping in the correlated f-band
Zsolt Gulacsi
We report for the first time exact ground-states deduced for the D=2 dimensional generic periodic Anderson model at finite , the Hamiltonian of the model not containing direct h…
Exact multi-electronic electron-concentration dependent ground-states for disordered two-dimensional two-band systems in presence of disordered hoppings and finite on-site random interactions
Zsolt Gulacsi
We report exact multielectronic ground-states dependent on electron concentration for quantum mechanical two-dimensional disordered two-band type many body models in the presence o…
Structure formation in binary colloids
Imre Varga, Ferenc Kun, Karoly F. Pal
A theoretical study of the structure formation observed very recently [Phys. Rev. Lett. 90, 128303 (2003)] in binary colloids is presented. In our model solely the dipole-dipole in…
Renormalization-Group Analysis of the Generalized sine-Gordon Model and of the Coulomb Gas for d >= 3 Dimensions
I. Nandori, U. D. Jentschura, K. Sailer +1
Renormalization-group (RG) flow equations have been derived for the generalized sine-Gordon model (GSGM) and the Coulomb gas (CG) in d >= 3 of dimensions by means of Wegner's and H…
Search for Scalar Leptons and Scalar Quarks at LEP
L3 Collaboration
Scalar partners of quarks and leptons, predicted in supersymmetric models, are searched for in e^+e^- collisions at centre-of-mass energies between 192GeV and 209GeV at LEP. No evi…
Measurement of Non-Random Event-by-Event Fluctuations of Average Transverse Momentum in sqrt(s_NN)=200 GeV Au+Au and p+p Collisions
the PHENIX Collaboration, S. S. Adler
Event-by-event fluctuations of the average transverse momentum of produced particles near mid-rapidity have been measured by the PHENIX Collaboration in sqrt(s_NN)=200 GeV Au+Au an…
Search for Charged Higgs Bosons at LEP
L3 Collaboration
A search for pair-produced charged Higgs bosons is performed with the L3 detector at LEP using data collected at centre-of-mass energies between 189 and 209GeV, corresponding to an…
A Study of W+W-gamma Events at LEP
The OPAL collaboration, G. Abbiendi
A study of W+W- events accomanied by hard photon radiation produced in e+e- collisions at LEP is presented. Events consistent with being two on-shell W bosons and an isolated photo…
Measurement of Heavy Quark Forward-Backward Asymmetries and Average B Mixing Using Leptons in Hadronic Z Decays
The OPAL collaboration, G. Abbiendi
Hadronic Z0 decays with identified electrons or muons have been used to measure the forward-backward asymmetries of e^+e^- --> Z0 --> bbbar and e^+e^- --> Z0 --> ccbar events. The…
High-p_T Charged Hadron Suppression in Au+Au Collisions at sqrt(s_NN) = 200 GeV
PHENIX Collaboration, S. S. Adler
The PHENIX experiment at RHIC has measured charged hadron yields at mid-rapidity over a wide range of transverse momentum (0.5 < p_T < 10 GeV/c) in Au+Au collisions at sqrt(s_NN)=2…
Identified Charged Particle Spectra and Yields in Au+Au Collisions at sqrt(s_NN) = 200 GeV
PHENIX Collaboration, S. S. Adler
The centrality dependence of transverse momentum distributions and yields for pi^+/-, K^+/-, p and p^bar in Au+Au collisions at sqrt(s_NN) = 200 GeV at mid-rapidity are measured by…
Absence of Suppression in Particle Production at Large Transverse Momentum in sqrt(s_NN) = 200 GeV d+Au Collisions
PHENIX Collaboration, S. S. Adler
Transverse momentum spectra of charged hadrons with p_T < 8 GeV/c and neutral pions with p_T < 10 GeV/c have been measured at mid-rapidity by the PHENIX experiment at RHIC in d+Au…
J/psi production from proton-proton collisions at sqrt(s) = 200 GeV
PHENIX Collaboration, S. S. Adler
J/psi production has been measured in proton-proton collisions at sqrt(s)= 200 GeV over a wide rapidity and transverse momentum range by the PHENIX experiment at RHIC. Distribution…
Search for a Higgs Boson Decaying to Weak Boson Pairs at LEP
L3 Collaboration
A Higgs particle produced in association with a Z boson and decaying into weak boson pairs is searched for in 336.4 1/pb of data collected by the L3 experiment at LEP at centre-of-…
Linear maps on the space of all bounded observables preserving maximal deviation
L. Molnar, M. Barczy
In this paper we determine all the bijective linear maps on the space of bounded observables which preserve a fixed moment or the variance. Nonlinear versions of the corresponding…
Search for Stable and Long-Lived Massive Charged Particles in e+e- Collisions at sqrt(s) = 183-209 GeV
The OPAL collaboration
A search for stable and long-lived massive particles of electric charge |Q/e|=1 or fractional charges of 2/3, 4/3, and 5/3 is reported using data collected by the OPAL detector at…
Mid-Rapidity Neutral Pion Production in Proton-Proto Collisions at sqrt(s_NN) = 200 GeV
PHENIX Collaboration, S. S. Adler
The invariant differential cross section for inclusive neutral pion production in p+p collisions at sqrt(s_NN) = 200 GeV has been measured at mid-rapidity |eta| < 0.35 over the ran…
Scaling properties of proton and anti-proton production in sqrt(s_NN) = 200 GeV Au + Au collisions
PHENIX Collaboration, S. S. Adler
We report on the yield of protons and anti-protons, as a function of centrality and transverse momentum, in Au+Au collisions at sqrt(s_NN) = 200 GeV measured at mid-rapidity by the…
J/Psi Production in Au-Au Collisions at sqrt(s_NN) = 200 GeV at the Relativistic Heavy Ion Collider
S. S. Adler
First results on charm quarkonia production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The yield of J/Psi's measured in the PHENIX experim…